use crate::config::{Config, IdentityConfig};
use crate::diarize;
use crate::error::MinutesError;
use crate::logging;
use crate::markdown::{
    self, ContentType, Frontmatter, OutputStatus, ProcessingWarning, WriteResult,
};
use crate::notes;
use crate::summarize;
use chrono::{DateTime, Local};
use std::collections::{BTreeMap, BTreeSet};
use std::path::Path;
use whisper_guard::segments as wg_segments;

/// Stem active-ratio threshold below which a capture source is considered
/// "sparse" (almost no audible energy).
///
/// Keep in sync with the silence detector in `diarize::active_ratio` callers
/// (see `diarize.rs` around line 861, where the same `0.02` value classifies
/// a stem as `FailureKind::Sparse`). Pulled into a named constant so the
/// suppression gate below can read it without re-deriving the number.
const SPARSE_STEM_ACTIVE_RATIO: f32 = 0.02;

/// Body text we render in place of the transcript when the all-noise
/// suppression gate fires. Kept short and pointed - the surrounding markdown
/// already shows the diagnosis and `minutes process` retry hint, so this
/// just labels the gap.
const ALL_NOISE_SUPPRESSED_BODY: &str =
    "*No audible content was captured. See capture diagnostics.*";

/// Decide whether the transcript body should be suppressed because it is
/// almost certainly fabricated.
///
/// Returns `Some(diagnosis)` (a short human-readable string to store in
/// `Frontmatter::filter_diagnosis`) when **both** of these are true:
///
/// 1. Every non-empty line in `transcript` is a noise marker (bracketed
///    `[music]` / `[Growling]` or parenthetical `(crying)` / `(applause)`)
///    according to [`wg_segments::is_all_noise`].
/// 2. Both stem active ratios in `recording_health` are below
///    [`SPARSE_STEM_ACTIVE_RATIO`]. **Both ratios must be present**: if
///    either `voice_stem_active_ratio` or `system_stem_active_ratio` is
///    `None` (e.g. dictation captures with no system stem, or any recording
///    where stem-active health was not computed) the gate does NOT fire.
///    Missing health is treated as insufficient evidence to override the
///    transcript, not as confirmation that the stem was silent.
///
/// Otherwise returns `None` and the transcript flows through unchanged.
fn suppress_if_all_noise(
    transcript: &str,
    recording_health: Option<&markdown::RecordingHealth>,
) -> Option<String> {
    let lines: Vec<String> = transcript.lines().map(str::to_string).collect();
    if !wg_segments::is_all_noise(&lines) {
        return None;
    }

    let health = recording_health?;
    let voice = health.voice_stem_active_ratio?;
    let system = health.system_stem_active_ratio?;
    if voice >= SPARSE_STEM_ACTIVE_RATIO || system >= SPARSE_STEM_ACTIVE_RATIO {
        return None;
    }

    Some(format!(
        "all-noise transcript on sparse stems (voice active {:.3}, system active {:.3}, threshold {:.2}); whisper produced only non-speech markers - body suppressed",
        voice, system, SPARSE_STEM_ACTIVE_RATIO
    ))
}

/// Outcome of the shared suppression decision used by BOTH the
/// `write_transcript_artifact` background-recording path and the
/// `minutes process <wav>` reprocess path.
///
/// Returning a strongly typed struct (rather than a tuple) keeps the two call
/// sites mechanically identical and makes drift obvious in code review: if a
/// new field is added here the compiler forces an update at every call site.
#[derive(Debug, Clone, PartialEq, Eq)]
struct SuppressionOutcome {
    /// Replacement body to write in place of the hallucinated transcript.
    body: String,
    /// Human-readable explanation, stored in `Frontmatter::filter_diagnosis`.
    diagnosis: String,
}

/// Shared decision: should the transcript body be suppressed because it is
/// almost certainly fabricated noise on near-silent audio?
///
/// This is the **single source of truth** for the suppression rule. Both
/// `write_transcript_artifact` (background recording finalizer) and
/// `process_with_progress_and_sidecar` (`minutes process <wav>` reprocess
/// path) call this helper so users see identical behavior regardless of
/// which entry point produced the artifact - the codex review on PR #246
/// flagged this drift as blocker #2.
///
/// Returns `Some(outcome)` when [`suppress_if_all_noise`] confirms the
/// transcript is all noise markers AND both stems are sparse; `None`
/// otherwise.
fn should_suppress_transcript(
    transcript: &str,
    recording_health: Option<&markdown::RecordingHealth>,
) -> Option<SuppressionOutcome> {
    let diagnosis = suppress_if_all_noise(transcript, recording_health)?;
    Some(SuppressionOutcome {
        body: ALL_NOISE_SUPPRESSED_BODY.to_string(),
        diagnosis,
    })
}

/// Detect post-transcript pipeline degradation and produce one
/// [`ProcessingWarning`] per failed step. See issue #243.
///
/// Returns an empty `Vec` when nothing degraded. Callers should promote
/// [`OutputStatus::Complete`] to [`OutputStatus::Degraded`] when the
/// result is non-empty and store the warnings on
/// [`Frontmatter::processing_warnings`] so the file itself is honest
/// about which sections are missing or fell back to defaults.
///
/// Today this detects the most user-visible failure mode: the
/// summarization engine returned `None` despite being configured to run
/// (typically an agent-CLI timeout or unexpected error). Follow-up
/// PRs can plumb richer per-step warnings through the LLM call sites
/// to populate the `reason`, `timeout_secs`, and `message` fields with
/// precise context.
///
/// **Single source of truth** for the suppression rule shared by both
/// `write_transcript_artifact` and `process_with_progress_and_sidecar`.
/// Keeping the detection here (rather than at each call site) prevents
/// the two paths from drifting and emitting different status values
/// for the same underlying failure.
fn detect_summarization_warnings(
    summary: Option<&str>,
    engine: &str,
    agent_command: &str,
    agent_timeout_secs: u64,
    summarization_attempted: bool,
) -> Vec<ProcessingWarning> {
    let mut warnings = Vec::new();
    if engine == "none" {
        return warnings;
    }
    // If summarization was deliberately not attempted (e.g. no-speech path
    // or all-noise suppression), an absent summary is expected behavior,
    // not a degradation. Without this guard the helper would emit a bogus
    // `summarize_failed` warning on every no-speech recording.
    if !summarization_attempted {
        return warnings;
    }
    if summary.is_none() {
        // We know the engine ran and produced nothing. The specific reason
        // (timeout vs error vs network failure) lives in audio.log; this is
        // a coarser file-level signal so users see something is missing
        // without grepping logs. Follow-up: plumb the precise reason
        // through summarize::run_summarization's return type.
        let (reason, timeout_secs, message) = match engine {
            "agent" => (
                "summarize_failed".to_string(),
                Some(agent_timeout_secs),
                Some(format!(
                    "Summarization via agent `{}` produced no output (timeout budget {}s, or agent error); see audio.log for the precise reason.",
                    agent_command, agent_timeout_secs
                )),
            ),
            "auto" => (
                "summarize_failed".to_string(),
                Some(agent_timeout_secs),
                Some(format!(
                    "Summarization with `engine = \"auto\"` produced no output (auto-detect picks the first available agent CLI then runs under the {}s budget); see audio.log for which agent was selected and the precise failure.",
                    agent_timeout_secs
                )),
            ),
            other => (
                "summarize_failed".to_string(),
                None,
                Some(format!(
                    "Summarization via engine `{}` produced no output; see audio.log for the precise reason.",
                    other
                )),
            ),
        };
        warnings.push(ProcessingWarning {
            step: "summarize".to_string(),
            reason,
            timeout_secs,
            message,
        });
    }
    warnings
}

/// Result of Level 2 voice enrollment matching.
struct VoiceMatchResult {
    /// Speaker attributions from voice matching (one per matched label).
    attributions: Vec<diarize::SpeakerAttribution>,
    /// Whether the user's own enrolled profile exists in the database
    /// (by `config.identity.name`), regardless of whether it matched a speaker.
    self_profile_exists: bool,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, serde::Serialize)]
#[serde(rename_all = "kebab-case")]
enum SelfAttributionAppliedVia {
    VoiceStemMatch,
    SourceBackedStem,
    FallbackIdentityOnly,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, serde::Serialize)]
#[serde(rename_all = "kebab-case")]
enum SelfAttributionSkippedReason {
    NoDiarizedSpeakers,
    DiarizationNotFromStems,
    AlreadyMapped,
    NoStableLabel,
    RemoteOnlyLabel,
    NoSelfProfile,
    NoStems,
    EmptyVoiceStem,
    VoiceStemDiarizationFailed,
    VoiceStemNoSelfMatch,
}

#[derive(Debug, Clone, serde::Serialize)]
struct SelfAttributionDebug {
    returned_some: bool,
    #[serde(skip_serializing_if = "Option::is_none")]
    speaker_label: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    name: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    confidence: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    source: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    applied_via: Option<SelfAttributionAppliedVia>,
    #[serde(skip_serializing_if = "Option::is_none")]
    skipped_reason: Option<SelfAttributionSkippedReason>,
    #[serde(skip_serializing_if = "Option::is_none")]
    fallback_reason: Option<SelfAttributionSkippedReason>,
}

#[derive(Debug, Clone, serde::Serialize)]
struct SpeakerAttributionDebug {
    speaker_label: String,
    name: String,
    confidence: String,
    source: String,
}

#[derive(Debug, Clone, serde::Serialize)]
struct AttributionDebugInfo {
    capture_backend: String,
    diarization_from_stems: bool,
    raw_diarization_num_speakers: usize,
    effective_transcript_speaker_labels: Vec<String>,
    self_attribution: SelfAttributionDebug,
    final_speaker_map: Vec<SpeakerAttributionDebug>,
}

#[derive(Debug, Clone)]
struct AttributionProcessingResult {
    transcript: String,
    speaker_map: Vec<diarize::SpeakerAttribution>,
    debug: AttributionDebugInfo,
}

#[derive(Debug, Clone)]
struct SelfAttributionOutcome {
    attribution: Option<diarize::SpeakerAttribution>,
    debug: SelfAttributionDebug,
}

impl SelfAttributionOutcome {
    fn applied(
        attribution: diarize::SpeakerAttribution,
        applied_via: SelfAttributionAppliedVia,
        fallback_reason: Option<SelfAttributionSkippedReason>,
    ) -> Self {
        Self {
            debug: SelfAttributionDebug {
                returned_some: true,
                speaker_label: Some(attribution.speaker_label.clone()),
                name: Some(attribution.name.clone()),
                confidence: Some(confidence_label(attribution.confidence)),
                source: Some(attribution_source_label(attribution.source)),
                applied_via: Some(applied_via),
                skipped_reason: None,
                fallback_reason,
            },
            attribution: Some(attribution),
        }
    }

    fn skipped(reason: SelfAttributionSkippedReason) -> Self {
        Self {
            attribution: None,
            debug: SelfAttributionDebug {
                returned_some: false,
                speaker_label: None,
                name: None,
                confidence: None,
                source: None,
                applied_via: None,
                skipped_reason: Some(reason),
                fallback_reason: None,
            },
        }
    }
}

/// Match diarized speaker embeddings against enrolled voice profiles (Level 2).
///
/// For each speaker label, `match_embedding` returns at most one name — the
/// profile with the highest cosine similarity above threshold. This means each
/// label gets at most one attribution, even if multiple profiles exceed the
/// threshold.
fn match_speakers_by_voice(
    config: &Config,
    diarization_embeddings: &std::collections::HashMap<String, Vec<f32>>,
) -> VoiceMatchResult {
    if !config.voice.enabled || diarization_embeddings.is_empty() {
        return VoiceMatchResult {
            attributions: Vec::new(),
            self_profile_exists: false,
        };
    }

    let profiles = crate::voice::open_db()
        .ok()
        .and_then(|conn| crate::voice::load_all_with_embeddings(&conn).ok())
        .unwrap_or_default();

    if profiles.is_empty() {
        return VoiceMatchResult {
            attributions: Vec::new(),
            self_profile_exists: false,
        };
    }

    let self_profile_exists = config
        .identity
        .name
        .as_ref()
        .map(|name| {
            let slug = slugify(name);
            profiles.iter().any(|p| p.person_slug == slug)
        })
        .unwrap_or(false);

    let threshold = config.voice.match_threshold;
    let mut attributions = Vec::new();

    for (label, emb) in diarization_embeddings {
        if let Some(name) = crate::voice::match_embedding(emb, &profiles, threshold) {
            tracing::info!(
                speaker = %label,
                name = %name,
                threshold = threshold,
                "Level 2: voice enrollment match"
            );
            attributions.push(diarize::SpeakerAttribution {
                speaker_label: label.clone(),
                name,
                confidence: diarize::Confidence::High,
                source: diarize::AttributionSource::Enrollment,
            });
        }
    }

    VoiceMatchResult {
        attributions,
        self_profile_exists,
    }
}

fn confidence_label(confidence: diarize::Confidence) -> String {
    match confidence {
        diarize::Confidence::High => "high".into(),
        diarize::Confidence::Medium => "medium".into(),
        diarize::Confidence::Low => "low".into(),
    }
}

fn attribution_source_label(source: diarize::AttributionSource) -> String {
    match source {
        diarize::AttributionSource::Deterministic => "deterministic".into(),
        diarize::AttributionSource::Llm => "llm".into(),
        diarize::AttributionSource::Enrollment => "enrollment".into(),
        diarize::AttributionSource::Manual => "manual".into(),
        diarize::AttributionSource::MlBleedDegraded => "ml-bleed-degraded".into(),
        diarize::AttributionSource::StemRecovery => "stem-recovery".into(),
    }
}

fn infer_capture_backend(audio_path: &Path, source: Option<&str>) -> String {
    if audio_path
        .components()
        .any(|component| component.as_os_str() == "native-captures")
    {
        "native-call".into()
    } else if let Some(source) = source {
        source.to_string()
    } else if audio_path
        .extension()
        .and_then(|ext| ext.to_str())
        .is_some_and(|ext| ext.eq_ignore_ascii_case("wav"))
    {
        "cpal".into()
    } else {
        "unknown".into()
    }
}

fn extract_effective_transcript_speaker_labels(transcript: &str) -> Vec<String> {
    let mut labels = Vec::new();
    let mut seen = std::collections::HashSet::new();
    for line in transcript.lines() {
        if let Some(rest) = line.strip_prefix('[') {
            if let Some(bracket_end) = rest.find(']') {
                let inside = &rest[..bracket_end];
                if let Some(space_pos) = inside.find(' ') {
                    let label = &inside[..space_pos];
                    if seen.insert(label.to_string()) {
                        labels.push(label.to_string());
                    }
                }
            }
        }
    }
    labels
}

fn debug_speaker_map(speaker_map: &[diarize::SpeakerAttribution]) -> Vec<SpeakerAttributionDebug> {
    speaker_map
        .iter()
        .map(|entry| SpeakerAttributionDebug {
            speaker_label: entry.speaker_label.clone(),
            name: entry.name.clone(),
            confidence: confidence_label(entry.confidence),
            source: attribution_source_label(entry.source),
        })
        .collect()
}

fn is_degraded_ml_fallback_result(result: &diarize::DiarizationResult) -> bool {
    result.degraded_capture.is_some() && !result.from_stems && !result.source_aware
}

fn degraded_ml_recording_health(reason: diarize::DegradedCapture) -> markdown::RecordingHealth {
    markdown::RecordingHealth::from_degraded_capture(
        reason,
        markdown::DiarizationPath::MlBleedDegraded,
    )
}

fn merge_recording_health(
    primary: Option<markdown::RecordingHealth>,
    existing: Option<markdown::RecordingHealth>,
) -> Option<markdown::RecordingHealth> {
    match (primary, existing) {
        (Some(mut primary), Some(existing)) => {
            primary.voice_stem_active_ratio = primary
                .voice_stem_active_ratio
                .or(existing.voice_stem_active_ratio);
            primary.system_stem_active_ratio = primary
                .system_stem_active_ratio
                .or(existing.system_stem_active_ratio);
            primary.system_dominant_ratio = primary
                .system_dominant_ratio
                .or(existing.system_dominant_ratio);
            if primary.diarization_path.is_none() {
                primary.diarization_path = existing.diarization_path;
            }
            let mut warnings = existing.capture_warnings;
            warnings.extend(primary.capture_warnings);
            primary.capture_warnings = warnings;
            Some(primary)
        }
        (Some(primary), None) => Some(primary),
        (None, Some(existing)) => Some(existing),
        (None, None) => None,
    }
}

fn mark_degraded_ml_attributions(speaker_map: &mut [diarize::SpeakerAttribution]) {
    for attribution in speaker_map {
        attribution.confidence = diarize::Confidence::Low;
        attribution.source = diarize::AttributionSource::MlBleedDegraded;
    }
}

fn log_rendered_label_collapse_diagnostic(
    audio_path: &Path,
    result: &diarize::DiarizationResult,
    transcript: &str,
) {
    if result.num_speakers <= 1 {
        return;
    }

    let rendered_labels = extract_effective_transcript_speaker_labels(transcript);
    let rendered_speaker_labels = rendered_labels
        .iter()
        .filter(|label| label.as_str() != "UNKNOWN")
        .count();
    if rendered_speaker_labels > 1 {
        return;
    }

    tracing::warn!(
        diarization_speakers = result.num_speakers,
        rendered_speaker_labels,
        degraded_capture = result.degraded_capture.is_some(),
        audio = %audio_path.display(),
        "diarization found multiple speakers but transcript rendered one or fewer speaker labels"
    );
    logging::log_step(
        "diarize_rendered_label_collapse",
        &audio_path.display().to_string(),
        0,
        serde_json::json!({
            "diagnostic": true,
            "diarization_speakers": result.num_speakers,
            "rendered_speaker_labels": rendered_speaker_labels,
            "degraded_capture": result.degraded_capture.is_some(),
        }),
    );
}

fn expected_voice_stem_path(audio_path: &Path) -> Option<std::path::PathBuf> {
    let stem = audio_path.file_stem()?.to_str()?;
    let dir = audio_path.parent()?;
    Some(dir.join(format!("{}.voice.wav", stem)))
}

/// RAII handle for a stem-mix temp file. Dropping the value unlinks the
/// file from /tmp, including on early Err returns from the transcription
/// coordinator. Belt-and-suspenders against future call-site refactors
/// that might forget the manual cleanup (#235 review item #1).
///
/// The temp file contains raw meeting audio, so leaking it on error is
/// a privacy issue, not just a cleanliness one. The Drop impl deliberately
/// swallows the unlink error (the file may already be gone if the OS or
/// a test harness cleaned it up); leaving a partial file behind is the
/// only failure mode worth thinking about and `Drop` cannot recover from
/// it any better than the existing best-effort logic did.
struct MixedStemTempFile {
    path: std::path::PathBuf,
}

impl MixedStemTempFile {
    fn as_path(&self) -> &Path {
        &self.path
    }
}

impl Drop for MixedStemTempFile {
    fn drop(&mut self) {
        let _ = std::fs::remove_file(&self.path);
    }
}

/// Prepare the input handed to the transcription coordinator, working around
/// the macOS 26 SCRecordingOutput dual-track `.mov` 2x decode bug (#234).
///
/// macOS SCRecordingOutput writes a `.mov` with two audio tracks (system + mic)
/// plus pristine `.voice.wav` and `.system.wav` PCM stems beside it. Decoding
/// the `.mov` for transcription produces audio at 2x real duration, so whisper
/// receives garbled samples and emits gibberish. When the stems are present and
/// valid, this helper mixes them into a 16kHz mono PCM via `ffmpeg amix` and
/// returns a `MixedStemTempFile` for the caller to hand to the transcriber;
/// the handle's `Drop` impl cleans up the temp file on success, Err, panic, or
/// any future early-return.
///
/// Return contract:
/// - `Ok(None)` — input does not need stem-mixing. Either it is not a `.mov`,
///   or it is a `.mov` with no sibling stems at all (treated as an ordinary
///   non-native-call container; the caller hands the original path to the
///   transcriber and accepts whatever the decoder does with it).
/// - `Ok(Some(handle))` — input is a native-call `.mov` and stems mixed cleanly.
/// - `Err(MinutesError::Transcribe(NativeCaptureStemMixUnavailable))` — input is
///   a native-call `.mov` (one or both stems present, indicating a SCRecording-
///   Output capture) but the mix cannot be produced. This is the "should-have-
///   mixed-but-couldn't" case from PR #235 review item #4: silent fallback to
///   the broken `.mov` decode would re-enter exactly the bug this helper exists
///   to prevent, so the caller is forced to propagate.
///
/// Path handling: the `.mov` is canonicalized before stem lookup so a symlinked
/// recording resolves to its target before sibling lookup (#237 touched the
/// same area in the diarization path). Stem discovery, including the empty-stem
/// check via `stem_has_audio`, reuses [`crate::diarize::discover_stem_plan`] so
/// a single source of truth governs which side files count as "stems present".
fn prepare_transcription_input(
    audio_path: &Path,
) -> Result<Option<MixedStemTempFile>, MinutesError> {
    // Only `.mov` containers can hit the 2x decode bug. Everything else is
    // either a clean PCM wav (Jake's manual reprocess flow), a single-stream
    // m4a/mp3/ogg (voice memos), or a format that does not exercise the
    // SCRecordingOutput dual-track path.
    let ext = audio_path
        .extension()
        .and_then(|e| e.to_str())
        .map(|s| s.to_lowercase());
    if ext.as_deref() != Some("mov") {
        return Ok(None);
    }

    // Canonicalize so a symlinked `.mov` resolves to its target before stem
    // lookup. Stems live next to the canonical file, not the symlink. Falls
    // back to the original path if canonicalize fails (symlink to a target
    // we cannot stat, permission denied, etc.); the stem discovery on the
    // next line will return None for any path it cannot read alongside.
    let canonical = audio_path
        .canonicalize()
        .unwrap_or_else(|_| audio_path.to_path_buf());

    // Stem discovery reuses the diarization helper so transcription and
    // diarization agree on what "stems present" means, including the
    // zero-byte-stem check via `stem_has_audio` that catches partial-crash
    // wavs (.exists() alone accepts them; `stem_has_audio` requires a valid
    // hound-readable header with non-zero sample/channel counts).
    let plan = crate::diarize::discover_stem_plan(&canonical);

    let stems = match plan {
        Some(crate::diarize::SourceAwareDiarizationPlan::FullStems(paths)) => paths,
        Some(crate::diarize::SourceAwareDiarizationPlan::SystemStemOnly(system)) => {
            return Err(
                crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
                    reason: format!(
                        "voice stem missing or empty for {} (system stem present at {}). \
                     Cannot mix to PCM; recording is unrecoverable without the mic side.",
                        canonical.display(),
                        system.display()
                    ),
                }
                .into(),
            );
        }
        Some(crate::diarize::SourceAwareDiarizationPlan::SilentSystemStem(paths)) => {
            return Err(
                crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
                    reason: format!(
                        "system stem at {} is empty (voice stem present at {}). \
                     Partial-crash signature; mix would substitute silence for the far-side audio.",
                        paths.system.display(),
                        paths.voice.display()
                    ),
                }
                .into(),
            );
        }
        None => {
            // `discover_stem_plan` returns None for two semantically different
            // cases: (a) neither stem present (ordinary non-native-call `.mov`
            // or a native capture whose stems were cleaned up) and (b) voice
            // stem present and audible but system stem file is entirely
            // absent from disk (`(true, false) && !system.exists()` branch of
            // discover_stem_plan at `diarize.rs:600-606`). Case (b) is a
            // native capture where the system side was lost during recording,
            // and falling through to the broken `.mov` decoder reproduces the
            // exact 2x-duration bug this helper exists to prevent. Codex
            // review of PR #235 v2 caught this.
            //
            // Distinguish by independently checking for a usable sibling
            // voice stem. If one exists, surface the same typed error as
            // the other should-have-mixed-but-couldn't branches.
            if let Some(parent) = canonical.parent() {
                if let Some(stem_name) = canonical.file_stem().and_then(|s| s.to_str()) {
                    let voice = parent.join(format!("{}.voice.wav", stem_name));
                    if voice.exists() && crate::diarize::stem_has_audio(&voice) {
                        return Err(
                            crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
                                reason: format!(
                                    "voice stem present at {} but system stem is missing from disk. \
                                     Partial-crash signature; mix would substitute silence for the \
                                     far-side audio.",
                                    voice.display()
                                ),
                            }
                            .into(),
                        );
                    }
                }
            }
            // No usable stems at all. Could be a non-native-call `.mov`
            // (screen recording, downloaded file) or a native-call capture
            // whose stems were cleaned up; we cannot distinguish. Conservative:
            // treat as ordinary `.mov` and let the existing decoder handle
            // it. Hard-erroring on every stemless `.mov` would break
            // legitimate non-native-call use cases.
            return Ok(None);
        }
    };

    // Tempfile name includes pid + nanosecond timestamp + stem so two
    // concurrent invocations on the same recording cannot land on the same
    // path (Tauri's recovery path can spawn a worker thread for a recording
    // whose `processing` flag is mid-CAS, which would otherwise collide
    // here). Falls back to pid+stem alone if SystemTime is unavailable.
    let stem_name = canonical
        .file_stem()
        .and_then(|s| s.to_str())
        .unwrap_or("unknown");
    let unique_suffix = std::time::SystemTime::now()
        .duration_since(std::time::UNIX_EPOCH)
        .map(|d| d.as_nanos())
        .unwrap_or(0);
    let tmp = std::env::temp_dir().join(format!(
        "minutes-stem-mix-{}-{}-{}.wav",
        std::process::id(),
        unique_suffix,
        stem_name
    ));
    #[cfg(unix)]
    {
        if let Ok(f) = std::fs::File::create(&tmp) {
            drop(f);
            use std::os::unix::fs::PermissionsExt;
            std::fs::set_permissions(&tmp, std::fs::Permissions::from_mode(0o600)).ok();
        }
    }

    // ffmpeg amix defaults: `duration=longest` is the framework default
    // (specifying it explicitly was redundant); `normalize=1` is the
    // default and prevents combined-amplitude clipping when one stem is
    // significantly louder than the other. System audio is usually
    // hotter than mic, so `normalize=0` could bake clipping into the
    // PCM before whisper sees it (jmh1313 confirmed the original PR's
    // recordings had stems at -0.0 and -0.1 dB peak, which would have
    // clipped on normalize=0). Default normalization is the safer
    // choice unless we add explicit weights with measured levels.
    let system_str = stems.system.to_str().ok_or_else(|| {
        crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
            reason: format!(
                "system stem path is not valid UTF-8: {}",
                stems.system.display()
            ),
        }
    })?;
    let voice_str = stems.voice.to_str().ok_or_else(|| {
        crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
            reason: format!(
                "voice stem path is not valid UTF-8: {}",
                stems.voice.display()
            ),
        }
    })?;
    let tmp_str = tmp.to_str().ok_or_else(|| {
        crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
            reason: format!("temp mix path is not valid UTF-8: {}", tmp.display()),
        }
    })?;

    let output = std::process::Command::new("ffmpeg")
        .args([
            "-y",
            "-i",
            system_str,
            "-i",
            voice_str,
            "-filter_complex",
            "[0:a][1:a]amix=inputs=2",
            "-ac",
            "1",
            "-ar",
            "16000",
            "-c:a",
            "pcm_s16le",
            tmp_str,
        ])
        .stdin(std::process::Stdio::null())
        .stdout(std::process::Stdio::null())
        .stderr(std::process::Stdio::piped())
        .output()
        .map_err(|e| {
            let _ = std::fs::remove_file(&tmp);
            crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
                reason: format!(
                    "ffmpeg could not be invoked for stem mix of {}: {}. Install ffmpeg (brew install ffmpeg).",
                    canonical.display(),
                    e
                ),
            }
        })?;
    if !output.status.success() {
        let _ = std::fs::remove_file(&tmp);
        let stderr_tail = String::from_utf8_lossy(&output.stderr);
        let last_line = stderr_tail
            .lines()
            .last()
            .unwrap_or("(no stderr)")
            .to_string();
        return Err(
            crate::error::TranscribeError::NativeCaptureStemMixUnavailable {
                reason: format!(
                    "ffmpeg amix failed for {} (voice={}, system={}): {}",
                    canonical.display(),
                    stems.voice.display(),
                    stems.system.display(),
                    last_line
                ),
            }
            .into(),
        );
    }
    tracing::info!(
        audio = %canonical.display(),
        mixed = %tmp.display(),
        "using mixed stems instead of .mov for transcription (workaround for dual-track 2x bug)"
    );
    Ok(Some(MixedStemTempFile { path: tmp }))
}

fn log_attribution_decision(
    audio_path: &Path,
    output_path: &Path,
    duration_ms: u64,
    details: &AttributionDebugInfo,
) {
    let extra = serde_json::json!({
        "output": output_path.display().to_string(),
        "capture_backend": details.capture_backend,
        "diarization_from_stems": details.diarization_from_stems,
        "raw_diarization_num_speakers": details.raw_diarization_num_speakers,
        "effective_transcript_speaker_labels": details.effective_transcript_speaker_labels,
        "self_attribution": details.self_attribution,
        "speaker_map": details.final_speaker_map,
    });
    logging::log_step(
        "attribution",
        &audio_path.display().to_string(),
        duration_ms,
        extra,
    );
    tracing::info!(
        audio = %audio_path.display(),
        output = %output_path.display(),
        capture_backend = %details.capture_backend,
        diarization_from_stems = details.diarization_from_stems,
        raw_diarization_num_speakers = details.raw_diarization_num_speakers,
        effective_transcript_speaker_labels = ?details.effective_transcript_speaker_labels,
        self_attribution = ?details.self_attribution,
        speaker_map = ?details.final_speaker_map,
        "meeting attribution instrumentation"
    );
}

fn summary_signal_chars(summary: &summarize::Summary) -> usize {
    summary.text.len()
        + summary
            .decisions
            .iter()
            .map(|item| item.len())
            .sum::<usize>()
        + summary
            .action_items
            .iter()
            .map(|item| item.len())
            .sum::<usize>()
        + summary
            .open_questions
            .iter()
            .map(|item| item.len())
            .sum::<usize>()
        + summary
            .commitments
            .iter()
            .map(|item| item.len())
            .sum::<usize>()
        + summary
            .key_points
            .iter()
            .map(|item| item.len())
            .sum::<usize>()
        + summary
            .participants
            .iter()
            .map(|item| item.len())
            .sum::<usize>()
}

fn serialized_chars<T: serde::Serialize>(value: &T) -> usize {
    serde_json::to_string(value)
        .map(|json| json.len())
        .unwrap_or(0)
}

struct StructuredLlmLogFields {
    outcome: &'static str,
    model: String,
    input_chars: usize,
    output_chars: usize,
    extra: serde_json::Value,
}

fn log_structured_llm_step(
    step: &str,
    audio_path: &Path,
    started: std::time::Instant,
    fields: StructuredLlmLogFields,
) {
    let mut payload = serde_json::Map::from_iter([
        ("outcome".to_string(), serde_json::json!(fields.outcome)),
        ("model".to_string(), serde_json::json!(fields.model)),
        (
            "input_chars".to_string(),
            serde_json::json!(fields.input_chars),
        ),
        (
            "output_chars".to_string(),
            serde_json::json!(fields.output_chars),
        ),
    ]);
    if let Some(obj) = fields.extra.as_object() {
        payload.extend(obj.clone());
    }
    logging::log_step(
        step,
        &audio_path.display().to_string(),
        started.elapsed().as_millis() as u64,
        serde_json::Value::Object(payload),
    );
}

#[allow(clippy::too_many_arguments)]
fn single_stem_speaker_self_attribution(
    audio_path: &Path,
    config: &Config,
    voice_result: &VoiceMatchResult,
    diarization_from_stems: bool,
    transcript: &str,
    transcript_labels: &[String],
    already_mapped_labels: &std::collections::HashSet<String>,
) -> SelfAttributionOutcome {
    if !diarization_from_stems || !already_mapped_labels.is_empty() {
        return if !diarization_from_stems {
            SelfAttributionOutcome::skipped(SelfAttributionSkippedReason::DiarizationNotFromStems)
        } else {
            SelfAttributionOutcome::skipped(SelfAttributionSkippedReason::AlreadyMapped)
        };
    }

    let source_backed_speaker_label = if transcript_labels.iter().any(|label| label == "SPEAKER_0")
    {
        Some("SPEAKER_0".to_string())
    } else {
        None
    };
    let speaker_label = if let Some(label) = source_backed_speaker_label.clone() {
        label
    } else if transcript_labels.len() == 1 && transcript_labels[0] == "SPEAKER_1" {
        "SPEAKER_1".to_string()
    } else if transcript.contains("[UNKNOWN ") {
        "UNKNOWN".to_string()
    } else {
        return SelfAttributionOutcome::skipped(SelfAttributionSkippedReason::NoStableLabel);
    };

    let Some(my_name) = config.identity.name.as_ref() else {
        return SelfAttributionOutcome::skipped(SelfAttributionSkippedReason::NoSelfProfile);
    };
    if let Some(voice_stem_path) = expected_voice_stem_path(audio_path) {
        if let Ok(metadata) = std::fs::metadata(&voice_stem_path) {
            if metadata.len() <= 44 {
                return SelfAttributionOutcome::skipped(
                    SelfAttributionSkippedReason::EmptyVoiceStem,
                );
            }
        }
    }
    if let Some(stems) = diarize::discover_stems(audio_path) {
        if let Some(source_backed_label) = source_backed_speaker_label.clone() {
            if let Some(voice_stem_result) = diarize::diarize(&stems.voice, config) {
                let matched_self =
                    match_speakers_by_voice(config, &voice_stem_result.speaker_embeddings)
                        .attributions
                        .iter()
                        .any(|attr| attr.name == *my_name);
                return SelfAttributionOutcome::applied(
                    diarize::SpeakerAttribution {
                        speaker_label: source_backed_label,
                        name: my_name.clone(),
                        confidence: if matched_self {
                            diarize::Confidence::High
                        } else {
                            diarize::Confidence::Medium
                        },
                        source: if matched_self {
                            diarize::AttributionSource::Enrollment
                        } else {
                            diarize::AttributionSource::Deterministic
                        },
                    },
                    if matched_self {
                        SelfAttributionAppliedVia::VoiceStemMatch
                    } else {
                        SelfAttributionAppliedVia::SourceBackedStem
                    },
                    None,
                );
            }

            return SelfAttributionOutcome::applied(
                diarize::SpeakerAttribution {
                    speaker_label: source_backed_label,
                    name: my_name.clone(),
                    confidence: diarize::Confidence::Medium,
                    source: diarize::AttributionSource::Deterministic,
                },
                SelfAttributionAppliedVia::SourceBackedStem,
                Some(SelfAttributionSkippedReason::VoiceStemDiarizationFailed),
            );
        }

        if let Some(voice_stem_result) = diarize::diarize(&stems.voice, config) {
            let _ = voice_stem_result;
            if speaker_label == "SPEAKER_1" {
                return SelfAttributionOutcome::skipped(
                    SelfAttributionSkippedReason::RemoteOnlyLabel,
                );
            }

            return SelfAttributionOutcome::skipped(
                SelfAttributionSkippedReason::VoiceStemNoSelfMatch,
            );
        }

        return SelfAttributionOutcome::skipped(
            SelfAttributionSkippedReason::VoiceStemDiarizationFailed,
        );
    }

    if speaker_label == "SPEAKER_1" {
        return SelfAttributionOutcome::skipped(SelfAttributionSkippedReason::RemoteOnlyLabel);
    }

    SelfAttributionOutcome::applied(
        diarize::SpeakerAttribution {
            speaker_label,
            name: my_name.clone(),
            confidence: diarize::Confidence::Medium,
            source: diarize::AttributionSource::Deterministic,
        },
        SelfAttributionAppliedVia::FallbackIdentityOnly,
        Some(if voice_result.self_profile_exists {
            SelfAttributionSkippedReason::NoStems
        } else {
            SelfAttributionSkippedReason::NoSelfProfile
        }),
    )
}

#[allow(clippy::too_many_arguments)]
fn attribute_meeting_speakers(
    audio_path: &Path,
    content_type: ContentType,
    source: Option<&str>,
    config: &Config,
    trusted_attendees: &[String],
    llm_attendees: &[String],
    diarization_num_speakers: usize,
    diarization_from_stems: bool,
    degraded_ml_fallback: bool,
    diarization_embeddings: &std::collections::HashMap<String, Vec<f32>>,
    transcript: String,
) -> AttributionProcessingResult {
    let mut transcript = transcript;
    let mut speaker_map: Vec<diarize::SpeakerAttribution> = Vec::new();
    let capture_backend = infer_capture_backend(audio_path, source);

    let self_attribution = if content_type == ContentType::Meeting && diarization_num_speakers == 0
    {
        SelfAttributionOutcome::skipped(SelfAttributionSkippedReason::NoDiarizedSpeakers)
    } else if content_type != ContentType::Meeting {
        SelfAttributionOutcome::skipped(SelfAttributionSkippedReason::NoStableLabel)
    } else {
        let voice_result = match_speakers_by_voice(config, diarization_embeddings);
        speaker_map.extend(voice_result.attributions.clone());

        let transcript_labels = crate::summarize::extract_speaker_labels_pub(&transcript);
        let l2_labels: std::collections::HashSet<String> = speaker_map
            .iter()
            .map(|a| a.speaker_label.clone())
            .collect();

        if !trusted_attendees.is_empty()
            && diarization_num_speakers == trusted_attendees.len()
            && diarization_num_speakers == 2
            && transcript_labels.len() == 2
            && l2_labels.is_empty()
        {
            if let Some(my_name) = config.identity.name.as_ref() {
                let my_slug = slugify(my_name);
                let other = trusted_attendees
                    .iter()
                    .find(|attendee| slugify(attendee) != my_slug);
                if let Some(other_name) = other {
                    speaker_map.push(diarize::SpeakerAttribution {
                        speaker_label: transcript_labels[0].clone(),
                        name: my_name.clone(),
                        confidence: diarize::Confidence::Medium,
                        source: diarize::AttributionSource::Deterministic,
                    });
                    speaker_map.push(diarize::SpeakerAttribution {
                        speaker_label: transcript_labels[1].clone(),
                        name: other_name.clone(),
                        confidence: diarize::Confidence::Medium,
                        source: diarize::AttributionSource::Deterministic,
                    });
                    tracing::info!(
                        my_name = %my_name,
                        other_name = %other_name,
                        labels = ?transcript_labels,
                        "Level 0: deterministic 1-on-1 speaker attribution"
                    );
                }
            }
        }

        // Recompute the mapped-labels set so it reflects BOTH L2 voice matches
        // (extended into speaker_map at line 456) AND any L0 deterministic
        // mapping that just fired above. l2_labels was captured before L0,
        // so passing it here would let self_attribution duplicate a label
        // L0 already mapped (regression introduced by f15a7e8).
        let already_mapped_labels: std::collections::HashSet<String> = speaker_map
            .iter()
            .map(|a| a.speaker_label.clone())
            .collect();
        let self_attribution = single_stem_speaker_self_attribution(
            audio_path,
            config,
            &voice_result,
            diarization_from_stems,
            &transcript,
            &transcript_labels,
            &already_mapped_labels,
        );
        if let Some(attr) = self_attribution.attribution.clone() {
            speaker_map.push(attr);
        }

        let mapped_labels: std::collections::HashSet<String> = speaker_map
            .iter()
            .map(|attribution| attribution.speaker_label.clone())
            .collect();
        let has_unmapped = transcript.lines().any(|line| {
            if let Some(rest) = line.strip_prefix('[') {
                if let Some(bracket_end) = rest.find(']') {
                    let inside = &rest[..bracket_end];
                    if let Some(space_pos) = inside.find(' ') {
                        let label = &inside[..space_pos];
                        return label.starts_with("SPEAKER_") && !mapped_labels.contains(label);
                    }
                }
            }
            false
        });
        if has_unmapped {
            // Keep L0 deterministic mapping fenced to trusted attendees; the
            // broader merged attendee list is only for the L1 name-mapping fallback.
            let log_file = audio_path.display().to_string();
            for attribution in
                summarize::map_speakers(&transcript, llm_attendees, config, Some(&log_file))
            {
                if !mapped_labels.contains(&attribution.speaker_label) {
                    speaker_map.push(attribution);
                }
            }
        }

        let effective_transcript_speaker_labels =
            extract_effective_transcript_speaker_labels(&transcript);

        if degraded_ml_fallback {
            mark_degraded_ml_attributions(&mut speaker_map);
        }

        if speaker_map
            .iter()
            .any(|attribution| attribution.confidence == diarize::Confidence::High)
        {
            transcript = diarize::apply_confirmed_names(&transcript, &speaker_map);
        }

        return AttributionProcessingResult {
            debug: AttributionDebugInfo {
                capture_backend,
                diarization_from_stems,
                raw_diarization_num_speakers: diarization_num_speakers,
                effective_transcript_speaker_labels,
                self_attribution: self_attribution.debug,
                final_speaker_map: debug_speaker_map(&speaker_map),
            },
            transcript,
            speaker_map,
        };
    };

    AttributionProcessingResult {
        debug: AttributionDebugInfo {
            capture_backend,
            diarization_from_stems,
            raw_diarization_num_speakers: diarization_num_speakers,
            effective_transcript_speaker_labels: extract_effective_transcript_speaker_labels(
                &transcript,
            ),
            self_attribution: self_attribution.debug,
            final_speaker_map: debug_speaker_map(&speaker_map),
        },
        transcript,
        speaker_map,
    }
}

// ──────────────────────────────────────────────────────────────
// Pipeline orchestration:
//
//   Audio → Transcribe → [Diarize] → [Summarize] → Write Markdown
//                           ▲             ▲
//                           │             │
//                     config.diarization  config.summarization
//                     .engine != "none"   .engine != "none"
//
// Transcription uses whisper-rs (whisper.cpp) with symphonia for
// format conversion (m4a/mp3/ogg → 16kHz mono PCM).
// Phase 1b adds Diarize + Summarize with if-guards.
// ──────────────────────────────────────────────────────────────

#[derive(Debug, Clone, Copy, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
#[serde(rename_all = "kebab-case")]
pub enum PipelineStage {
    Transcribing,
    Diarizing,
    Summarizing,
    Saving,
}

#[derive(Debug, Clone, Default)]
pub struct BackgroundPipelineContext {
    pub sidecar: Option<SidecarMetadata>,
    pub user_notes: Option<String>,
    pub pre_context: Option<String>,
    pub calendar_event: Option<crate::calendar::CalendarEvent>,
    pub recorded_at: Option<DateTime<Local>>,
    pub requested_title: Option<String>,
    pub recording_health: Option<crate::markdown::RecordingHealth>,
    /// Optional template applied to summarization. Recorded in frontmatter
    /// so Phase 2 reprocessing knows which template produced this file.
    pub template: Option<crate::template::Template>,
}

#[derive(Debug, Clone)]
pub struct TranscriptArtifact {
    pub write_result: WriteResult,
    pub frontmatter: Frontmatter,
    pub transcript: String,
}

/// Optional metadata from a sidecar JSON file (e.g., from iPhone Apple Shortcut).
/// Merged into frontmatter when present.
#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
pub struct SidecarMetadata {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub device: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub captured_at: Option<chrono::DateTime<Local>>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub source: Option<String>,
}

/// Process an audio file through the full pipeline.
pub fn process(
    audio_path: &Path,
    content_type: ContentType,
    title: Option<&str>,
    config: &Config,
) -> Result<WriteResult, MinutesError> {
    process_with_sidecar(audio_path, content_type, title, config, None, |_| {})
}

/// Process an audio file with optional sidecar metadata (from iPhone, etc.).
pub fn process_with_sidecar<F>(
    audio_path: &Path,
    content_type: ContentType,
    title: Option<&str>,
    config: &Config,
    sidecar: Option<&SidecarMetadata>,
    on_progress: F,
) -> Result<WriteResult, MinutesError>
where
    F: FnMut(PipelineStage),
{
    process_with_progress_and_sidecar(
        audio_path,
        content_type,
        title,
        config,
        sidecar,
        None,
        on_progress,
    )
}

pub fn process_with_progress<F>(
    audio_path: &Path,
    content_type: ContentType,
    title: Option<&str>,
    config: &Config,
    on_progress: F,
) -> Result<WriteResult, MinutesError>
where
    F: FnMut(PipelineStage),
{
    process_with_progress_and_sidecar(
        audio_path,
        content_type,
        title,
        config,
        None,
        None,
        on_progress,
    )
}

/// Process an audio file with an optional template applied to summarization.
/// The template's slug is recorded in the meeting's frontmatter so a Phase 2
/// reprocessor can identify which template produced the file.
pub fn process_with_template<F>(
    audio_path: &Path,
    content_type: ContentType,
    title: Option<&str>,
    config: &Config,
    sidecar: Option<&SidecarMetadata>,
    template: Option<&crate::template::Template>,
    on_progress: F,
) -> Result<WriteResult, MinutesError>
where
    F: FnMut(PipelineStage),
{
    process_with_progress_and_sidecar(
        audio_path,
        content_type,
        title,
        config,
        sidecar,
        template,
        on_progress,
    )
}

pub fn transcribe_to_artifact(
    audio_path: &Path,
    content_type: ContentType,
    title: Option<&str>,
    config: &Config,
    context: &BackgroundPipelineContext,
    existing_output_path: Option<&Path>,
) -> Result<TranscriptArtifact, MinutesError> {
    let metadata = std::fs::metadata(audio_path)?;
    if metadata.len() == 0 {
        return Err(crate::error::TranscribeError::EmptyAudio.into());
    }
    let recording_date =
        infer_recording_date(context.recorded_at, context.sidecar.as_ref(), &metadata);

    if let Ok(canonical) = audio_path.canonicalize() {
        let allowed = &config.security.allowed_audio_dirs;
        if !allowed.is_empty() {
            let in_allowed = allowed.iter().any(|dir| {
                dir.canonicalize()
                    .map(|d| canonical.starts_with(&d))
                    .unwrap_or(false)
            });
            if !in_allowed {
                return Err(crate::error::TranscribeError::UnsupportedFormat(format!(
                    "file not in allowed directories: {}",
                    audio_path.display()
                ))
                .into());
            }
        }
    }

    let matched_event = if content_type == ContentType::Meeting {
        context.calendar_event.clone().or_else(|| {
            select_calendar_event(&crate::calendar::events_overlapping(recording_date), title)
        })
    } else {
        None
    };
    let calendar_event_title = matched_event.as_ref().map(|event| event.title.clone());
    let attendees = matched_event
        .as_ref()
        .map(|event| event.attendees.clone())
        .unwrap_or_default();
    let decode_hints = build_decode_hints(
        title,
        calendar_event_title.as_deref(),
        context.pre_context.as_deref(),
        &attendees,
        Some(&config.identity),
        load_vocabulary_for_decode_hints().as_ref(),
    );

    // Apply the same stem-mix workaround as `process_with_progress_and_sidecar`
    // so background-job and `minutes process` callers (which reach the
    // pipeline via `transcribe_to_artifact` and bypass the foreground
    // entry point) are not exposed to the macOS 26 dual-track `.mov` 2x
    // bug. The MixedStemTempFile handle's Drop impl cleans up the temp PCM
    // on success, on Err propagation, or on panic. #235 review item #6.
    let mixed_stem_path = prepare_transcription_input(audio_path)?;
    let transcribe_input = mixed_stem_path
        .as_ref()
        .map(|f| f.as_path())
        .unwrap_or(audio_path);
    let step_start = std::time::Instant::now();
    let result = crate::transcription_coordinator::transcribe_path_for_content_with_hints(
        transcribe_input,
        content_type,
        config,
        decode_hints,
    )?;
    drop(mixed_stem_path);
    let transcript = if content_type == ContentType::Meeting {
        normalize_transcript_for_self_name_participant(&result.text, &attendees, &config.identity)
    } else {
        result.text
    };
    let filter_stats = result.stats;
    write_transcript_artifact(
        audio_path,
        content_type,
        title,
        config,
        context,
        existing_output_path,
        transcript,
        filter_stats,
        step_start.elapsed().as_millis() as u64,
    )
}

#[allow(clippy::too_many_arguments)]
pub fn write_transcript_artifact(
    audio_path: &Path,
    content_type: ContentType,
    title: Option<&str>,
    config: &Config,
    context: &BackgroundPipelineContext,
    existing_output_path: Option<&Path>,
    transcript: String,
    filter_stats: crate::transcribe::FilterStats,
    transcribe_ms: u64,
) -> Result<TranscriptArtifact, MinutesError> {
    let metadata = std::fs::metadata(audio_path)?;
    let recording_date =
        infer_recording_date(context.recorded_at, context.sidecar.as_ref(), &metadata);
    let matched_event = if content_type == ContentType::Meeting {
        context.calendar_event.clone().or_else(|| {
            select_calendar_event(&crate::calendar::events_overlapping(recording_date), title)
        })
    } else {
        None
    };
    let calendar_event_title = matched_event.as_ref().map(|event| event.title.clone());
    let attendees = matched_event
        .as_ref()
        .map(|event| event.attendees.clone())
        .unwrap_or_default();
    let transcript = if content_type == ContentType::Meeting {
        normalize_transcript_for_self_name_participant(&transcript, &attendees, &config.identity)
    } else {
        transcript
    };

    // Suppression gate (issue #241): if the cleaned transcript is nothing but
    // hallucinated non-speech markers AND both capture stems were sparse, the
    // body is almost certainly fabricated on near-silent audio. Replace it
    // with a clear diagnostic message and promote `status: NoSpeech` for
    // greppability. The original noisy text is dropped - the source WAV is
    // preserved on disk and `minutes process` is the canonical retry path,
    // so there is no need to round-trip the hallucinated lines through the
    // markdown output.
    //
    // Decision routed through `should_suppress_transcript` so this path and
    // `process_with_progress_and_sidecar` share the exact same gate (codex
    // blocker #2 on PR #246).
    let (transcript, forced_no_speech_diagnosis) =
        match should_suppress_transcript(&transcript, context.recording_health.as_ref()) {
            Some(outcome) => (outcome.body, Some(outcome.diagnosis)),
            None => (transcript, None),
        };

    let word_count = transcript.split_whitespace().count();
    logging::log_step(
        "transcribe",
        &audio_path.display().to_string(),
        transcribe_ms,
        serde_json::json!({"words": word_count, "mode": "background", "diagnosis": filter_stats.diagnosis()}),
    );

    let status =
        if forced_no_speech_diagnosis.is_some() || word_count < config.transcription.min_words {
            Some(OutputStatus::NoSpeech)
        } else {
            Some(OutputStatus::TranscriptOnly)
        };

    let auto_title = title.map(String::from).unwrap_or_else(|| {
        if status == Some(OutputStatus::NoSpeech) {
            "Untitled Recording".into()
        } else {
            calendar_event_title
                .as_deref()
                .and_then(title_from_context)
                .map(finalize_title)
                .unwrap_or_else(|| generate_title(&transcript, context.pre_context.as_deref()))
        }
    });

    let entities = build_entity_links(
        &auto_title,
        context.pre_context.as_deref(),
        &attendees,
        &[],
        &[],
        &[],
        &[],
        Some(&config.identity),
    );
    let people = entities
        .people
        .iter()
        .map(|entity| entity.label.clone())
        .collect();

    let source = if let Some(source) = context
        .sidecar
        .as_ref()
        .and_then(|sidecar| sidecar.source.clone())
    {
        Some(source)
    } else {
        match content_type {
            ContentType::Memo => Some("voice-memos".into()),
            ContentType::Meeting => None,
            ContentType::Dictation => Some("dictation".into()),
        }
    };
    let tags = derive_structured_tags(
        content_type,
        source.as_deref(),
        context
            .sidecar
            .as_ref()
            .and_then(|sidecar| sidecar.device.as_deref()),
        &entities,
        &[],
        &[],
    );

    let frontmatter = Frontmatter {
        title: auto_title,
        r#type: content_type,
        date: recording_date,
        duration: estimate_duration(audio_path),
        source,
        status,
        tags,
        attendees,
        attendees_raw: None,
        calendar_event: calendar_event_title,
        people,
        entities,
        device: context
            .sidecar
            .as_ref()
            .and_then(|sidecar| sidecar.device.clone()),
        captured_at: context
            .sidecar
            .as_ref()
            .and_then(|sidecar| sidecar.captured_at),
        context: context.pre_context.clone(),
        action_items: vec![],
        decisions: vec![],
        intents: vec![],
        recorded_by: config.identity.name.clone(),
        visibility: None,
        speaker_map: vec![],
        recording_health: context.recording_health.clone(),
        processing_warnings: Vec::new(),
        template: context.template.as_ref().map(|t| t.slug().to_string()),
        filter_diagnosis: if status == Some(OutputStatus::NoSpeech) {
            // Prefer the all-noise-suppression diagnosis when it fired; it
            // describes a different failure mode (whisper produced only
            // non-speech markers on sparse stems) than the standard
            // min_words / no_speech filter path.
            Some(
                forced_no_speech_diagnosis
                    .clone()
                    .unwrap_or_else(|| filter_stats.diagnosis()),
            )
        } else {
            None
        },
    };

    let write_result = if let Some(path) = existing_output_path {
        markdown::rewrite_with_retry_path(
            path,
            &frontmatter,
            &transcript,
            None,
            context.user_notes.as_deref(),
            Some(audio_path),
        )?
    } else {
        markdown::write_with_retry_path(
            &frontmatter,
            &transcript,
            None,
            context.user_notes.as_deref(),
            Some(audio_path),
            config,
        )?
    };

    Ok(TranscriptArtifact {
        write_result,
        frontmatter,
        transcript,
    })
}

pub fn enrich_transcript_artifact<F>(
    audio_path: &Path,
    artifact: &TranscriptArtifact,
    config: &Config,
    context: &BackgroundPipelineContext,
    mut on_progress: F,
) -> Result<WriteResult, MinutesError>
where
    F: FnMut(PipelineStage),
{
    if artifact.frontmatter.status == Some(OutputStatus::NoSpeech) {
        return Ok(artifact.write_result.clone());
    }

    let mut transcript = artifact.transcript.clone();
    let mut diarization_num_speakers = 0usize;
    let mut diarization_from_stems = false;
    let mut degraded_ml_fallback = false;
    let mut diarization_embeddings: std::collections::HashMap<String, Vec<f32>> =
        std::collections::HashMap::new();
    let mut recording_health: Option<markdown::RecordingHealth> = None;
    if config.diarization.engine != "none" && artifact.frontmatter.r#type == ContentType::Meeting {
        on_progress(PipelineStage::Diarizing);
        let diarize_start = std::time::Instant::now();
        let transcript_windows = build_transcript_windows(
            &transcript,
            diarize::audio_duration_secs(audio_path).unwrap_or(f64::INFINITY),
        );
        let ctx = diarize::DiarizationContext {
            purpose: diarize::DiarizationPurpose::PrimaryMeeting,
            transcript_windows: Some(&transcript_windows),
        };
        match diarize::diarize_with_context(audio_path, config, ctx) {
            diarize::DiarizationOutcome::Result(result) => {
                let diarize_ms = diarize_start.elapsed().as_millis() as u64;
                diarization_num_speakers = result.num_speakers;
                diarization_from_stems = result.source_aware;
                degraded_ml_fallback = is_degraded_ml_fallback_result(&result);
                if degraded_ml_fallback {
                    if let Some(reason) = result.degraded_capture.clone() {
                        recording_health = Some(degraded_ml_recording_health(reason));
                    }
                }
                diarization_embeddings = result.speaker_embeddings.clone();
                logging::log_step(
                    "diarize",
                    &audio_path.display().to_string(),
                    diarize_ms,
                    serde_json::json!({
                        "speakers": result.num_speakers,
                        "segments": result.segments.len(),
                        "first_segment_start": result.segments.first().map(|s| s.start),
                        "last_segment_end": result.segments.last().map(|s| s.end),
                    }),
                );
                transcript = diarize::apply_speakers(&transcript, &result);
                log_rendered_label_collapse_diagnostic(audio_path, &result, &transcript);
            }
            diarize::DiarizationOutcome::Skipped { reason } => {
                let diarize_ms = diarize_start.elapsed().as_millis() as u64;
                logging::log_step(
                    "diarize",
                    &audio_path.display().to_string(),
                    diarize_ms,
                    serde_json::json!({
                        "skipped": true,
                        "reason": "degraded_capture",
                        "failure_kind": format!("{:?}", reason.failure_kind),
                    }),
                );
                recording_health = Some(reason.into());
            }
            diarize::DiarizationOutcome::NotConfigured => {
                logging::log_step(
                    "diarize",
                    &audio_path.display().to_string(),
                    diarize_start.elapsed().as_millis() as u64,
                    serde_json::json!({"skipped": true}),
                );
            }
        }
    }

    let screen_dir = crate::screen::screens_dir_for(audio_path);
    let screen_files = if screen_dir.exists() {
        crate::screen::list_screenshots(&screen_dir)
    } else {
        vec![]
    };

    let mut summary_participants: Vec<String> = Vec::new();
    let mut structured_actions: Vec<markdown::ActionItem> = Vec::new();
    let mut structured_decisions: Vec<markdown::Decision> = Vec::new();
    let mut structured_intents: Vec<markdown::Intent> = Vec::new();
    let audio_log_target = audio_path.display().to_string();
    let summary_model = summarize::summarization_model_hint(config, !screen_files.is_empty());

    let mut raw_summary: Option<summarize::Summary> = None;
    let summary = if config.summarization.engine != "none" {
        on_progress(PipelineStage::Summarizing);
        let transcript_with_notes = if let Some(notes) = context.user_notes.as_ref() {
            format!(
                "USER NOTES (these moments were marked as important — weight them heavily):\n{}\n\nTRANSCRIPT:\n{}",
                notes, transcript
            )
        } else {
            transcript.clone()
        };

        summarize::summarize_with_template(
            &transcript_with_notes,
            &screen_files,
            config,
            context.template.as_ref(),
            Some(&audio_log_target),
        )
        .map(|summary| {
            let summary_chars = summary_signal_chars(&summary);

            let actions_started = std::time::Instant::now();
            structured_actions = extract_action_items(&summary);
            log_structured_llm_step(
                "action_items",
                audio_path,
                actions_started,
                StructuredLlmLogFields {
                    outcome: if structured_actions.is_empty() {
                        "empty"
                    } else {
                        "ok"
                    },
                    model: summary_model.clone(),
                    input_chars: summary_chars,
                    output_chars: serialized_chars(&structured_actions),
                    extra: serde_json::json!({ "count": structured_actions.len() }),
                },
            );

            structured_decisions = extract_decisions(&summary);

            let intents_started = std::time::Instant::now();
            structured_intents = extract_intents(&summary);
            log_structured_llm_step(
                "intent_extract",
                audio_path,
                intents_started,
                StructuredLlmLogFields {
                    outcome: if structured_intents.is_empty() {
                        "empty"
                    } else {
                        "ok"
                    },
                    model: summary_model.clone(),
                    input_chars: summary_chars,
                    output_chars: serialized_chars(&structured_intents),
                    extra: serde_json::json!({ "count": structured_intents.len() }),
                },
            );

            summary_participants = summary.participants.clone();
            let formatted = summarize::format_summary(&summary);
            raw_summary = Some(summary);
            formatted
        })
    } else {
        None
    };
    if summary.is_none() && config.summarization.engine != "none" {
        log_structured_llm_step(
            "action_items",
            audio_path,
            std::time::Instant::now(),
            StructuredLlmLogFields {
                outcome: "fallback",
                model: summary_model.clone(),
                input_chars: transcript.len(),
                output_chars: 0,
                extra: serde_json::json!({ "count": 0 }),
            },
        );
        log_structured_llm_step(
            "intent_extract",
            audio_path,
            std::time::Instant::now(),
            StructuredLlmLogFields {
                outcome: "fallback",
                model: summary_model.clone(),
                input_chars: transcript.len(),
                output_chars: 0,
                extra: serde_json::json!({ "count": 0 }),
            },
        );
    }

    if !screen_files.is_empty()
        && !config.screen_context.keep_after_summary
        && std::fs::remove_dir_all(&screen_dir).is_ok()
    {
        tracing::info!(dir = %screen_dir.display(), "screen captures cleaned up");
    }

    let attendees = merge_attendees(&artifact.frontmatter.attendees, &summary_participants);

    let attribution_start = std::time::Instant::now();
    let attribution = attribute_meeting_speakers(
        audio_path,
        artifact.frontmatter.r#type,
        artifact.frontmatter.source.as_deref(),
        config,
        &artifact.frontmatter.attendees,
        &attendees,
        diarization_num_speakers,
        diarization_from_stems,
        degraded_ml_fallback,
        &diarization_embeddings,
        transcript,
    );
    let attribution_ms = attribution_start.elapsed().as_millis() as u64;
    transcript = attribution.transcript;
    let speaker_map = attribution.speaker_map;
    let attendees = normalize_attendees_with_speaker_map(&attendees, &speaker_map);
    let structured_actions =
        normalize_action_items_with_speaker_map(structured_actions, &speaker_map);
    let structured_intents = normalize_intents_with_speaker_map(structured_intents, &speaker_map);
    let structured_decisions =
        normalize_decisions_with_speaker_map(structured_decisions, &speaker_map);

    let entities_started = std::time::Instant::now();
    let entities = build_entity_links(
        &artifact.frontmatter.title,
        context.pre_context.as_deref(),
        &attendees,
        &structured_actions,
        &structured_decisions,
        &structured_intents,
        &artifact.frontmatter.tags,
        Some(&config.identity),
    );
    log_structured_llm_step(
        "entity_extract",
        audio_path,
        entities_started,
        StructuredLlmLogFields {
            outcome: if entities.people.is_empty() && entities.projects.is_empty() {
                "empty"
            } else if raw_summary.is_some() {
                "ok"
            } else {
                "fallback"
            },
            model: summary_model.clone(),
            input_chars: transcript.len(),
            output_chars: serialized_chars(&entities),
            extra: serde_json::json!({
                "people": entities.people.len(),
                "projects": entities.projects.len(),
            }),
        },
    );
    let people = entities
        .people
        .iter()
        .map(|entity| entity.label.clone())
        .collect();
    let title_generation = maybe_refine_title_with_llm(
        &artifact.frontmatter.title,
        context.requested_title.as_deref(),
        summary.as_deref(),
        raw_summary.as_ref(),
        &entities,
        config,
        summarize::refine_title,
    );

    let mut frontmatter = artifact.frontmatter.clone();
    // write_transcript_artifact calls summarize unconditionally whenever
    // engine != "none" (no all-noise gate at this site), so attempted-ness
    // collapses to the same condition.
    let summarization_attempted = config.summarization.engine != "none";
    let summarization_warnings = detect_summarization_warnings(
        summary.as_deref(),
        &config.summarization.engine,
        &config.summarization.agent_command,
        config.summarization.agent_timeout_secs,
        summarization_attempted,
    );
    frontmatter.status = if !summarization_warnings.is_empty() {
        Some(OutputStatus::Degraded)
    } else if config.summarization.engine != "none" {
        Some(OutputStatus::Complete)
    } else {
        Some(OutputStatus::TranscriptOnly)
    };
    frontmatter.processing_warnings = summarization_warnings;
    frontmatter.attendees = attendees;
    frontmatter.people = people;
    frontmatter.entities = entities;
    frontmatter.action_items = structured_actions;
    frontmatter.decisions = structured_decisions;
    frontmatter.intents = structured_intents;
    frontmatter.speaker_map = speaker_map;
    frontmatter.recording_health =
        merge_recording_health(recording_health, frontmatter.recording_health);

    on_progress(PipelineStage::Saving);
    let mut result = markdown::rewrite_with_retry_path(
        &artifact.write_result.path,
        &frontmatter,
        &transcript,
        summary.as_deref(),
        context.user_notes.as_deref(),
        Some(audio_path),
    )?;
    apply_title_generation(
        audio_path,
        &mut result,
        &mut frontmatter,
        title_generation,
        |duration_ms, extra| {
            logging::log_step(
                "title_generation",
                &audio_path.display().to_string(),
                duration_ms,
                extra,
            );
        },
    );

    if frontmatter.r#type == ContentType::Meeting {
        log_attribution_decision(audio_path, &result.path, attribution_ms, &attribution.debug);
    }

    if !diarization_embeddings.is_empty() {
        crate::voice::save_meeting_embeddings(&result.path, &diarization_embeddings);
    }

    // Emit structured insight events for agent subscription
    if let Some(ref summary_data) = raw_summary {
        crate::events::emit_insights_from_summary(
            summary_data,
            &result.path.display().to_string(),
            &frontmatter.title,
            &frontmatter.attendees,
        );
    }

    if let Err(error) = crate::daily_notes::append_backlink(
        &result,
        frontmatter.date,
        summary.as_deref(),
        Some(&frontmatter),
        config,
    ) {
        tracing::warn!(
            error = %error,
            output = %result.path.display(),
            "failed to append daily note backlink"
        );
    }

    match crate::vault::sync_file(&result.path, config) {
        Ok(Some(vault_path)) => {
            crate::events::append_event(crate::events::MinutesEvent::VaultSynced {
                source_path: result.path.display().to_string(),
                vault_path: vault_path.display().to_string(),
                strategy: config.vault.strategy.clone(),
            });
        }
        Ok(None) => {}
        Err(error) => {
            tracing::warn!(error = %error, output = %result.path.display(), "vault sync failed");
        }
    }

    if config.knowledge.enabled {
        match crate::knowledge::update_from_meeting(&result, &frontmatter, &transcript, config) {
            Ok(update) => {
                if update.facts_written > 0 {
                    tracing::info!(
                        facts_written = update.facts_written,
                        facts_skipped = update.facts_skipped,
                        people = ?update.people_updated,
                        "knowledge base updated"
                    );
                    crate::events::append_event(crate::events::MinutesEvent::KnowledgeUpdated {
                        meeting_path: result.path.display().to_string(),
                        facts_written: update.facts_written,
                        facts_skipped: update.facts_skipped,
                        people_updated: update.people_updated,
                    });
                }
            }
            Err(error) => {
                tracing::warn!(
                    error = %error,
                    meeting = %result.path.display(),
                    "knowledge update failed"
                );
            }
        }
    }

    Ok(result)
}

fn process_with_progress_and_sidecar<F>(
    audio_path: &Path,
    content_type: ContentType,
    title: Option<&str>,
    config: &Config,
    sidecar: Option<&SidecarMetadata>,
    template: Option<&crate::template::Template>,
    mut on_progress: F,
) -> Result<WriteResult, MinutesError>
where
    F: FnMut(PipelineStage),
{
    let start = std::time::Instant::now();
    tracing::info!(
        file = %audio_path.display(),
        content_type = ?content_type,
        "starting pipeline"
    );

    // Verify file exists and is not empty
    let metadata = std::fs::metadata(audio_path)?;
    let recording_date =
        infer_recording_date(sidecar.and_then(|s| s.captured_at), sidecar, &metadata);
    if metadata.len() == 0 {
        return Err(crate::error::TranscribeError::EmptyAudio.into());
    }

    // Security: verify file is in an allowed directory (prevents path traversal via MCP)
    if let Ok(canonical) = audio_path.canonicalize() {
        let allowed = &config.security.allowed_audio_dirs;
        if !allowed.is_empty() {
            let in_allowed = allowed.iter().any(|dir| {
                dir.canonicalize()
                    .map(|d| canonical.starts_with(&d))
                    .unwrap_or(false)
            });
            if !in_allowed {
                return Err(crate::error::TranscribeError::UnsupportedFormat(format!(
                    "file not in allowed directories: {}",
                    audio_path.display()
                ))
                .into());
            }
        }
    }

    // Read user notes and pre-meeting context before transcription so they can
    // inform batch decode hints.
    let user_notes = notes::read_notes();
    let pre_context = notes::read_context();

    let calendar_events = if content_type == ContentType::Meeting {
        crate::calendar::events_overlapping(recording_date)
    } else {
        Vec::new()
    };
    let matched_event = select_calendar_event(&calendar_events, title);
    let calendar_event_title = matched_event.as_ref().map(|e| e.title.clone());
    let calendar_attendees: Vec<String> = matched_event
        .as_ref()
        .map(|e| e.attendees.clone())
        .unwrap_or_default();
    let decode_hints = build_decode_hints(
        title,
        calendar_event_title.as_deref(),
        pre_context.as_deref(),
        &calendar_attendees,
        Some(&config.identity),
        load_vocabulary_for_decode_hints().as_ref(),
    );

    // Step 1: Transcribe (always)
    on_progress(PipelineStage::Transcribing);
    // Workaround: if this is a native-call .mov with stems beside it, transcribe
    // a freshly-mixed PCM from the stems to avoid the .mov dual-track 2x bug.
    // `mixed_stem_path` is held in this scope so its Drop impl removes the
    // temp file when this function returns, including on Err propagation
    // from the transcription coordinator (#235 review item #1: meeting
    // audio in /tmp is a privacy issue and the previous manual cleanup
    // was skipped by the `?` early-return). The `?` here propagates the
    // typed `NativeCaptureStemMixUnavailable` error (#235 review item #4)
    // up to the pipeline boundary so the UI surfaces the real failure
    // instead of silently transcribing the broken `.mov`.
    let mixed_stem_path = prepare_transcription_input(audio_path)?;
    let transcribe_input = mixed_stem_path
        .as_ref()
        .map(|f| f.as_path())
        .unwrap_or(audio_path);
    tracing::info!(step = "transcribe", file = %transcribe_input.display(), "transcribing audio");
    let step_start = std::time::Instant::now();
    let result = crate::transcription_coordinator::transcribe_path_for_content_with_hints(
        transcribe_input,
        content_type,
        config,
        decode_hints,
    )?;
    drop(mixed_stem_path);
    let transcribe_ms = step_start.elapsed().as_millis() as u64;
    let transcript = if content_type == ContentType::Meeting {
        normalize_transcript_for_self_name_participant(
            &result.text,
            &calendar_attendees,
            &config.identity,
        )
    } else {
        result.text
    };
    let filter_stats = result.stats;

    let word_count = transcript.split_whitespace().count();
    tracing::info!(
        step = "transcribe",
        words = word_count,
        diagnosis = filter_stats.diagnosis(),
        "transcription complete"
    );
    logging::log_step(
        "transcribe",
        &audio_path.display().to_string(),
        transcribe_ms,
        serde_json::json!({"words": word_count, "diagnosis": filter_stats.diagnosis()}),
    );

    // Check minimum word threshold
    let mut status = if word_count < config.transcription.min_words {
        tracing::warn!(
            words = word_count,
            min = config.transcription.min_words,
            diagnosis = filter_stats.diagnosis(),
            "below minimum word threshold — marking as no-speech"
        );
        Some(OutputStatus::NoSpeech)
    } else if config.summarization.engine != "none" {
        Some(OutputStatus::Complete)
    } else {
        Some(OutputStatus::TranscriptOnly)
    };

    // Step 2: Diarize (optional — depends on config.diarization.engine)
    let mut diarization_num_speakers: usize = 0;
    let mut diarization_from_stems = false;
    let mut degraded_ml_fallback = false;
    let mut diarization_embeddings: std::collections::HashMap<String, Vec<f32>> =
        std::collections::HashMap::new();
    let mut recording_health: Option<markdown::RecordingHealth> = None;
    let transcript = if config.diarization.engine != "none" && content_type == ContentType::Meeting
    {
        on_progress(PipelineStage::Diarizing);
        tracing::info!(step = "diarize", "running speaker diarization");
        let transcript_windows = build_transcript_windows(
            &transcript,
            diarize::audio_duration_secs(audio_path).unwrap_or(f64::INFINITY),
        );
        let ctx = diarize::DiarizationContext {
            purpose: diarize::DiarizationPurpose::PrimaryMeeting,
            transcript_windows: Some(&transcript_windows),
        };
        match diarize::diarize_with_context(audio_path, config, ctx) {
            diarize::DiarizationOutcome::Result(result) => {
                diarization_num_speakers = result.num_speakers;
                diarization_from_stems = result.source_aware;
                degraded_ml_fallback = is_degraded_ml_fallback_result(&result);
                if degraded_ml_fallback {
                    if let Some(reason) = result.degraded_capture.clone() {
                        recording_health = Some(degraded_ml_recording_health(reason));
                    }
                }
                diarization_embeddings = result.speaker_embeddings.clone();
                let transcript = diarize::apply_speakers(&transcript, &result);
                log_rendered_label_collapse_diagnostic(audio_path, &result, &transcript);
                transcript
            }
            diarize::DiarizationOutcome::Skipped { reason } => {
                recording_health = Some(reason.into());
                transcript
            }
            diarize::DiarizationOutcome::NotConfigured => transcript,
        }
    } else {
        transcript
    };

    // Suppression gate (issue #241): if the diarized transcript is nothing
    // but hallucinated non-speech markers AND both capture stems were sparse,
    // replace the body with a diagnostic message and force `status: NoSpeech`.
    // Routed through `should_suppress_transcript` so this path and
    // `write_transcript_artifact` share the exact same gate (codex blocker
    // #2 on PR #246) - users see identical behavior regardless of which
    // entry point produced the artifact. The original noisy text is dropped
    // - the source WAV is preserved and `minutes process` is the canonical
    // retry path.
    let (transcript, forced_no_speech_diagnosis) =
        match should_suppress_transcript(&transcript, recording_health.as_ref()) {
            Some(outcome) => {
                tracing::warn!(
                    step = "transcribe",
                    diagnosis = %outcome.diagnosis,
                    "all-noise suppression fired on process path — replacing transcript body"
                );
                // Force NoSpeech status: we know the body is fabricated even
                // if the original `word_count` cleared `min_words`.
                status = Some(OutputStatus::NoSpeech);
                (outcome.body, Some(outcome.diagnosis))
            }
            None => (transcript, None),
        };

    // Step 3: Summarize (optional — depends on config.summarization.engine)
    // Pass user notes to the summarizer as high-priority context
    // Step 3: Summarize + extract structured intent
    let mut structured_actions: Vec<markdown::ActionItem> = Vec::new();
    let mut structured_decisions: Vec<markdown::Decision> = Vec::new();
    let mut structured_intents: Vec<markdown::Intent> = Vec::new();

    // Collect screen context screenshots (if any were captured)
    let screen_dir = crate::screen::screens_dir_for(audio_path);
    let screen_files = if screen_dir.exists() {
        let files = crate::screen::list_screenshots(&screen_dir);
        if !files.is_empty() {
            tracing::info!(count = files.len(), "screen context screenshots found");
        }
        files
    } else {
        vec![]
    };

    let mut summary_participants: Vec<String> = Vec::new();
    let audio_log_target = audio_path.display().to_string();
    let summary_model = summarize::summarization_model_hint(config, !screen_files.is_empty());

    let mut raw_summary: Option<summarize::Summary> = None;
    // Skip summarization when the all-noise gate replaced the transcript body:
    // the LLM has nothing to summarize, and we'd just burn tokens / surface
    // a hallucinated summary on top of a hallucinated transcript.
    let summary: Option<String> = if forced_no_speech_diagnosis.is_some() {
        None
    } else if config.summarization.engine != "none" {
        on_progress(PipelineStage::Summarizing);
        tracing::info!(step = "summarize", "generating summary");

        // Build transcript with user notes as context
        let transcript_with_notes = if let Some(ref n) = user_notes {
            format!(
                "USER NOTES (these moments were marked as important — weight them heavily):\n{}\n\nTRANSCRIPT:\n{}",
                n, transcript
            )
        } else {
            transcript.clone()
        };

        // Send screenshots as actual images to vision-capable LLMs
        summarize::summarize_with_template(
            &transcript_with_notes,
            &screen_files,
            config,
            template,
            Some(&audio_log_target),
        )
        .map(|s| {
            let summary_chars = summary_signal_chars(&s);

            let actions_started = std::time::Instant::now();
            structured_actions = extract_action_items(&s);
            log_structured_llm_step(
                "action_items",
                audio_path,
                actions_started,
                StructuredLlmLogFields {
                    outcome: if structured_actions.is_empty() {
                        "empty"
                    } else {
                        "ok"
                    },
                    model: summary_model.clone(),
                    input_chars: summary_chars,
                    output_chars: serialized_chars(&structured_actions),
                    extra: serde_json::json!({ "count": structured_actions.len() }),
                },
            );

            structured_decisions = extract_decisions(&s);

            let intents_started = std::time::Instant::now();
            structured_intents = extract_intents(&s);
            log_structured_llm_step(
                "intent_extract",
                audio_path,
                intents_started,
                StructuredLlmLogFields {
                    outcome: if structured_intents.is_empty() {
                        "empty"
                    } else {
                        "ok"
                    },
                    model: summary_model.clone(),
                    input_chars: summary_chars,
                    output_chars: serialized_chars(&structured_intents),
                    extra: serde_json::json!({ "count": structured_intents.len() }),
                },
            );

            summary_participants = s.participants.clone();
            if !summary_participants.is_empty() {
                tracing::info!(
                    participants = ?summary_participants,
                    "extracted participants from summary"
                );
            }
            let formatted = summarize::format_summary(&s);
            raw_summary = Some(s);
            formatted
        })
    } else {
        None
    };
    if summary.is_none() && config.summarization.engine != "none" {
        log_structured_llm_step(
            "action_items",
            audio_path,
            std::time::Instant::now(),
            StructuredLlmLogFields {
                outcome: "fallback",
                model: summary_model.clone(),
                input_chars: transcript.len(),
                output_chars: 0,
                extra: serde_json::json!({ "count": 0 }),
            },
        );
        log_structured_llm_step(
            "intent_extract",
            audio_path,
            std::time::Instant::now(),
            StructuredLlmLogFields {
                outcome: "fallback",
                model: summary_model.clone(),
                input_chars: transcript.len(),
                output_chars: 0,
                extra: serde_json::json!({ "count": 0 }),
            },
        );
    }

    // Clean up screen captures (runs regardless of summarization setting — fixes race)
    if !screen_files.is_empty()
        && !config.screen_context.keep_after_summary
        && std::fs::remove_dir_all(&screen_dir).is_ok()
    {
        tracing::info!(dir = %screen_dir.display(), "screen captures cleaned up");
    }

    // Step 4: Match calendar event + merge attendees
    on_progress(PipelineStage::Saving);

    if let Some(ref title) = calendar_event_title {
        tracing::info!(event = %title, attendees = calendar_attendees.len(), "matched calendar event");
    }

    let attendees = merge_attendees(&calendar_attendees, &summary_participants);

    if !attendees.is_empty() {
        tracing::info!(attendees = ?attendees, "merged attendee list");
    }

    // Step 4b: Speaker attribution
    // Level 2 → Level 0 → Level 1 (voice enrollment → deterministic → LLM)
    let attribution_start = std::time::Instant::now();
    let attribution = attribute_meeting_speakers(
        audio_path,
        content_type,
        sidecar.and_then(|metadata| metadata.source.as_deref()),
        config,
        &calendar_attendees,
        &attendees,
        diarization_num_speakers,
        diarization_from_stems,
        degraded_ml_fallback,
        &diarization_embeddings,
        transcript,
    );
    let attribution_ms = attribution_start.elapsed().as_millis() as u64;
    let transcript = attribution.transcript;
    let speaker_map = attribution.speaker_map;
    let attendees = normalize_attendees_with_speaker_map(&attendees, &speaker_map);
    let structured_actions =
        normalize_action_items_with_speaker_map(structured_actions, &speaker_map);
    let structured_intents = normalize_intents_with_speaker_map(structured_intents, &speaker_map);
    let structured_decisions =
        normalize_decisions_with_speaker_map(structured_decisions, &speaker_map);

    // Step 5: Write markdown (always)
    let duration = estimate_duration(audio_path);
    let auto_title = title.map(String::from).unwrap_or_else(|| {
        if status == Some(OutputStatus::NoSpeech) {
            "Untitled Recording".into()
        } else {
            // Prefer calendar event title over transcript-derived title
            calendar_event_title
                .as_deref()
                .and_then(title_from_context)
                .map(finalize_title)
                .unwrap_or_else(|| generate_title(&transcript, pre_context.as_deref()))
        }
    });
    let entities_started = std::time::Instant::now();
    let entities = build_entity_links(
        &auto_title,
        pre_context.as_deref(),
        &attendees,
        &structured_actions,
        &structured_decisions,
        &structured_intents,
        &[],
        Some(&config.identity),
    );
    log_structured_llm_step(
        "entity_extract",
        audio_path,
        entities_started,
        StructuredLlmLogFields {
            outcome: if entities.people.is_empty() && entities.projects.is_empty() {
                "empty"
            } else if raw_summary.is_some() {
                "ok"
            } else {
                "fallback"
            },
            model: summary_model.clone(),
            input_chars: transcript.len(),
            output_chars: serialized_chars(&entities),
            extra: serde_json::json!({
                "people": entities.people.len(),
                "projects": entities.projects.len(),
            }),
        },
    );
    let people = entities
        .people
        .iter()
        .map(|entity| entity.label.clone())
        .collect();
    let title_generation = maybe_refine_title_with_llm(
        &auto_title,
        title,
        summary.as_deref(),
        raw_summary.as_ref(),
        &entities,
        config,
        summarize::refine_title,
    );

    // Determine source field: sidecar overrides default, normalize to "voice-memos" (plural)
    let source = if let Some(s) = sidecar.and_then(|s| s.source.clone()) {
        Some(s)
    } else {
        match content_type {
            ContentType::Memo => Some("voice-memos".into()),
            ContentType::Meeting => None,
            ContentType::Dictation => Some("dictation".into()),
        }
    };
    let tags = derive_structured_tags(
        content_type,
        source.as_deref(),
        sidecar.and_then(|s| s.device.as_deref()),
        &entities,
        &structured_decisions,
        &structured_intents,
    );

    // Issue #243: detect post-transcript degradation (e.g. summarization
    // failed or timed out) and promote status to `Degraded` so the file
    // itself is honest about what's missing. The initial `status` set
    // above didn't yet know whether summarization would succeed; this
    // is the corrective pass.
    //
    // Summarization was *attempted* only when both the all-noise gate
    // did NOT fire (forced_no_speech_diagnosis is None) AND engine is
    // not "none". Without the all-noise guard, an empty summary on a
    // no-speech recording would falsely look like a summarize failure.
    let summarization_attempted =
        forced_no_speech_diagnosis.is_none() && config.summarization.engine != "none";
    let summarization_warnings = detect_summarization_warnings(
        summary.as_deref(),
        &config.summarization.engine,
        &config.summarization.agent_command,
        config.summarization.agent_timeout_secs,
        summarization_attempted,
    );
    let status = if !summarization_warnings.is_empty() && status == Some(OutputStatus::Complete) {
        Some(OutputStatus::Degraded)
    } else {
        status
    };

    let mut frontmatter = Frontmatter {
        title: auto_title,
        r#type: content_type,
        date: recording_date,
        duration,
        source,
        status,
        processing_warnings: summarization_warnings,
        tags,
        attendees,
        attendees_raw: None,
        calendar_event: calendar_event_title,
        people,
        entities,
        device: sidecar.and_then(|s| s.device.clone()),
        captured_at: sidecar.and_then(|s| s.captured_at),
        context: pre_context,
        action_items: structured_actions,
        decisions: structured_decisions,
        intents: structured_intents,
        recorded_by: config.identity.name.clone(),
        visibility: None,
        speaker_map,
        recording_health,
        template: template.map(|t| t.slug().to_string()),
        filter_diagnosis: if status == Some(OutputStatus::NoSpeech) {
            // Prefer the all-noise-suppression diagnosis when it fired; it
            // describes a different failure mode (whisper produced only
            // non-speech markers on sparse stems) than the standard
            // min_words / no_speech filter path. Identical preference order
            // to `write_transcript_artifact` so both entry points produce
            // matching frontmatter.
            Some(
                forced_no_speech_diagnosis
                    .clone()
                    .unwrap_or_else(|| filter_stats.diagnosis()),
            )
        } else {
            None
        },
    };

    tracing::info!(step = "write", "writing markdown");
    let step_start = std::time::Instant::now();
    let mut result = markdown::write_with_retry_path(
        &frontmatter,
        &transcript,
        summary.as_deref(),
        user_notes.as_deref(),
        Some(audio_path),
        config,
    )?;
    apply_title_generation(
        audio_path,
        &mut result,
        &mut frontmatter,
        title_generation,
        |duration_ms, extra| {
            logging::log_step(
                "title_generation",
                &audio_path.display().to_string(),
                duration_ms,
                extra,
            );
        },
    );

    if frontmatter.r#type == ContentType::Meeting {
        log_attribution_decision(audio_path, &result.path, attribution_ms, &attribution.debug);
    }
    // Save per-speaker embeddings as sidecar (for Level 3 confirmed learning)
    if !diarization_embeddings.is_empty() {
        crate::voice::save_meeting_embeddings(&result.path, &diarization_embeddings);
    }

    if let Err(error) = crate::daily_notes::append_backlink(
        &result,
        frontmatter.date,
        summary.as_deref(),
        Some(&frontmatter),
        config,
    ) {
        tracing::warn!(
            error = %error,
            output = %result.path.display(),
            "failed to append daily note backlink"
        );
    }
    let write_ms = step_start.elapsed().as_millis() as u64;
    logging::log_step(
        "write",
        &audio_path.display().to_string(),
        write_ms,
        serde_json::json!({"output": result.path.display().to_string(), "words": result.word_count}),
    );

    // Emit structured insight events for agent subscription
    if let Some(ref summary_data) = raw_summary {
        crate::events::emit_insights_from_summary(
            summary_data,
            &result.path.display().to_string(),
            &result.title,
            &frontmatter.attendees,
        );
    }

    // Vault sync (non-fatal — pipeline succeeds regardless)
    match crate::vault::sync_file(&result.path, config) {
        Ok(Some(vault_path)) => {
            crate::events::append_event(crate::events::MinutesEvent::VaultSynced {
                source_path: result.path.display().to_string(),
                vault_path: vault_path.display().to_string(),
                strategy: config.vault.strategy.clone(),
            });
        }
        Ok(None) => {} // vault not enabled or no-op strategy
        Err(e) => {
            tracing::warn!(error = %e, output = %result.path.display(), "vault sync failed");
        }
    }

    // Emit event for agents/watchers
    crate::events::append_event(crate::events::audio_processed_event(
        &result,
        &audio_path.display().to_string(),
    ));

    let elapsed = start.elapsed();
    logging::log_step(
        "pipeline_complete",
        &audio_path.display().to_string(),
        elapsed.as_millis() as u64,
        serde_json::json!({"output": result.path.display().to_string(), "words": result.word_count, "content_type": format!("{:?}", content_type)}),
    );
    tracing::info!(
        file = %result.path.display(),
        words = result.word_count,
        elapsed_ms = elapsed.as_millis() as u64,
        "pipeline complete"
    );

    Ok(result)
}

/// Estimate audio duration from file size (rough approximation).
/// 16kHz mono 16-bit WAV ≈ 32KB/sec.
fn estimate_duration(audio_path: &Path) -> String {
    if let Ok(duration_secs) = diarize::audio_duration_secs(audio_path) {
        return format_duration_secs(duration_secs);
    }

    let bytes = std::fs::metadata(audio_path).map(|m| m.len()).unwrap_or(0);

    // WAV header is 44 bytes, then raw PCM at 32000 bytes/sec (16kHz 16-bit mono)
    let secs = if bytes > 44 { (bytes - 44) / 32_000 } else { 0 };

    format_duration_secs(secs as f64)
}

fn format_duration_secs(duration_secs: f64) -> String {
    let secs = duration_secs.round().max(0.0) as u64;
    let mins = secs / 60;
    let remaining_secs = secs % 60;
    if mins > 0 {
        format!("{}m {}s", mins, remaining_secs)
    } else {
        format!("{}s", remaining_secs)
    }
}

fn parse_transcript_line_start_secs(line: &str) -> Option<f32> {
    let rest = line.strip_prefix('[')?;
    let bracket_end = rest.find(']')?;
    let timestamp = &rest[..bracket_end];
    let parts: Vec<&str> = timestamp.split(':').collect();
    let secs = match parts.as_slice() {
        [minutes, seconds] => minutes.parse::<u64>().ok()? * 60 + seconds.parse::<u64>().ok()?,
        [hours, minutes, seconds] => {
            hours.parse::<u64>().ok()? * 3600
                + minutes.parse::<u64>().ok()? * 60
                + seconds.parse::<u64>().ok()?
        }
        _ => return None,
    };
    Some(secs as f32)
}

fn parse_transcript_line_starts(transcript: &str) -> Vec<f32> {
    transcript
        .lines()
        .filter_map(parse_transcript_line_start_secs)
        .collect()
}

fn build_transcript_windows(
    transcript: &str,
    audio_duration_secs: f64,
) -> Vec<diarize::TranscriptWindow> {
    let starts = parse_transcript_line_starts(transcript);
    let duration = audio_duration_secs as f32;
    let mut windows = Vec::new();

    for (index, start) in starts.iter().copied().enumerate() {
        let next_start = starts.get(index + 1).copied().unwrap_or(f32::INFINITY);
        let natural_end = start + 8.0;
        let mut end = next_start.min(natural_end);
        if duration.is_finite() {
            end = end.min(duration);
        }
        if end > start {
            windows.push(diarize::TranscriptWindow {
                start_secs: start,
                end_secs: end,
            });
        }
    }

    windows
}

#[derive(Debug, Clone, PartialEq, Eq)]
struct TitleGenerationDecision {
    final_title: String,
    refined_title: Option<String>,
    outcome: &'static str,
    model: Option<String>,
    input_chars: usize,
    detail: Option<String>,
    /// Wall-clock duration of the LLM refine call itself. Zero when the
    /// fallback paths (explicit title, missing summary) short-circuit before
    /// any LLM invocation.
    llm_duration_ms: u64,
}

fn maybe_refine_title_with_llm<F>(
    fallback_title: &str,
    explicit_title: Option<&str>,
    summary_text: Option<&str>,
    raw_summary: Option<&summarize::Summary>,
    entities: &markdown::EntityLinks,
    config: &Config,
    refine: F,
) -> TitleGenerationDecision
where
    F: FnOnce(
        &str,
        &summarize::Summary,
        &markdown::EntityLinks,
        &Config,
    ) -> Result<summarize::TitleRefinement, Box<dyn std::error::Error>>,
{
    if explicit_title.is_some() {
        return TitleGenerationDecision {
            final_title: fallback_title.to_string(),
            refined_title: None,
            outcome: "fallback",
            model: None,
            input_chars: 0,
            detail: Some("explicit-title".into()),
            llm_duration_ms: 0,
        };
    }

    let Some(summary_text) = summary_text.filter(|text| !text.trim().is_empty()) else {
        return TitleGenerationDecision {
            final_title: fallback_title.to_string(),
            refined_title: None,
            outcome: "fallback",
            model: None,
            input_chars: 0,
            detail: Some("missing-summary-text".into()),
            llm_duration_ms: 0,
        };
    };
    let Some(raw_summary) = raw_summary else {
        return TitleGenerationDecision {
            final_title: fallback_title.to_string(),
            refined_title: None,
            outcome: "fallback",
            model: None,
            input_chars: 0,
            detail: Some("missing-summary-struct".into()),
            llm_duration_ms: 0,
        };
    };

    let attempted_model = summarize::title_refinement_model(config);
    let input_chars = summarize::title_refinement_input_chars(summary_text, raw_summary, entities);

    let llm_started = std::time::Instant::now();
    let refine_result = refine(summary_text, raw_summary, entities, config);
    let llm_duration_ms = llm_started.elapsed().as_millis() as u64;

    match refine_result {
        Ok(refined) => {
            let cleaned = sanitize_llm_title_candidate(&refined.title);
            if llm_title_passes_quality(&cleaned) {
                TitleGenerationDecision {
                    final_title: cleaned.clone(),
                    refined_title: Some(cleaned),
                    outcome: "llm",
                    model: Some(refined.model),
                    input_chars: refined.input_chars,
                    detail: None,
                    llm_duration_ms,
                }
            } else {
                TitleGenerationDecision {
                    final_title: fallback_title.to_string(),
                    refined_title: None,
                    outcome: "fallback",
                    model: Some(refined.model),
                    input_chars: refined.input_chars,
                    detail: Some(format!("rejected-title: {}", cleaned)),
                    llm_duration_ms,
                }
            }
        }
        Err(error) => TitleGenerationDecision {
            final_title: fallback_title.to_string(),
            refined_title: None,
            outcome: "error",
            model: attempted_model,
            input_chars,
            detail: Some(error.to_string()),
            llm_duration_ms,
        },
    }
}

fn apply_title_generation(
    audio_path: &Path,
    result: &mut WriteResult,
    frontmatter: &mut Frontmatter,
    decision: TitleGenerationDecision,
    mut log_step: impl FnMut(u64, serde_json::Value),
) {
    let apply_start = std::time::Instant::now();
    let mut outcome = decision.outcome;
    let mut detail = decision.detail.clone();

    if let Some(refined_title) = decision.refined_title.as_ref() {
        if refined_title != &result.title {
            match markdown::rename_meeting(&result.path, refined_title) {
                Ok(new_path) => {
                    result.path = new_path;
                    result.title = refined_title.clone();
                    frontmatter.title = refined_title.clone();
                }
                Err(error) => {
                    outcome = "error";
                    detail = Some(error.to_string());
                    tracing::warn!(
                        error = %error,
                        output = %result.path.display(),
                        refined_title = %refined_title,
                        "failed to apply LLM-refined title"
                    );
                }
            }
        } else {
            frontmatter.title = refined_title.clone();
        }
    } else {
        frontmatter.title = decision.final_title.clone();
    }

    let apply_ms = apply_start.elapsed().as_millis() as u64;
    let mut extra = serde_json::json!({
        "outcome": outcome,
        "model": decision.model,
        "input_chars": decision.input_chars,
        "title": result.title,
        "apply_ms": apply_ms,
    });
    if let Some(detail) = detail {
        extra["detail"] = serde_json::json!(detail);
    }
    if result.path.as_os_str() != audio_path.as_os_str() {
        extra["output"] = serde_json::json!(result.path.display().to_string());
    }

    log_step(decision.llm_duration_ms, extra);
}

fn sanitize_llm_title_candidate(candidate: &str) -> String {
    let first_line = candidate
        .lines()
        .map(str::trim)
        .find(|line| !line.is_empty())
        .unwrap_or_default();
    let without_label = first_line
        .strip_prefix("Title:")
        .or_else(|| first_line.strip_prefix("title:"))
        .or_else(|| first_line.strip_prefix("Meeting title:"))
        .or_else(|| first_line.strip_prefix("meeting title:"))
        .unwrap_or(first_line)
        .trim();
    normalize_space(
        without_label.trim_matches(|c: char| matches!(c, '"' | '\'' | '`' | '*' | '-' | ' ')),
    )
    .trim_matches(|c: char| matches!(c, '.' | ':' | ';'))
    .to_string()
}

fn llm_title_passes_quality(candidate: &str) -> bool {
    if candidate.is_empty() || candidate.chars().count() > 80 {
        return false;
    }

    let words: Vec<String> = candidate
        .split_whitespace()
        .map(|word| {
            word.trim_matches(|c: char| !c.is_alphanumeric() && c != '\'' && c != '&' && c != '×')
                .to_lowercase()
        })
        .filter(|word| !word.is_empty())
        .collect();

    if words.len() < 2 || words.len() > 12 {
        return false;
    }

    let normalized = words.join(" ");
    let generic_exact = [
        "call",
        "conversation",
        "meeting",
        "memo",
        "recording",
        "sync",
        "untitled",
        "untitled recording",
    ];
    if generic_exact.contains(&normalized.as_str()) {
        return false;
    }

    let generic_words = [
        "call",
        "chat",
        "conversation",
        "discussion",
        "meeting",
        "memo",
        "notes",
        "recording",
        "review",
        "sync",
        "title",
        "update",
    ];
    let stopwords = ["a", "an", "and", "for", "of", "on", "the", "to", "with"];

    !words
        .iter()
        .all(|word| generic_words.contains(&word.as_str()) || stopwords.contains(&word.as_str()))
}

/// Generate a smart title from either the user-provided context or transcript.
fn generate_title(transcript: &str, pre_context: Option<&str>) -> String {
    if let Some(context) = pre_context.and_then(title_from_context) {
        return finalize_title(context);
    }

    if let Some(transcript_title) = title_from_transcript(transcript) {
        return finalize_title(transcript_title);
    }

    "Untitled Recording".into()
}

fn title_from_context(context: &str) -> Option<String> {
    let cleaned = normalize_space(context);
    if cleaned.is_empty() {
        return None;
    }

    let lower = cleaned.to_lowercase();
    let generic = [
        "meeting",
        "recording",
        "memo",
        "voice memo",
        "call",
        "conversation",
        "note",
    ];
    if generic.contains(&lower.as_str()) {
        return None;
    }

    Some(to_display_title(&cleaned))
}

fn title_from_transcript(transcript: &str) -> Option<String> {
    let first_line = transcript.lines().find_map(clean_transcript_line)?;
    let conversationally_stripped = strip_conversational_prefixes(&first_line);
    let stripped = strip_lead_in_phrase(&conversationally_stripped);
    let candidate = normalize_space(&stripped);

    if candidate.is_empty() {
        return None;
    }

    if is_unusable_transcript_title(&candidate) {
        tracing::debug!(candidate = %candidate, "rejecting generic conversational title candidate");
        return None;
    }

    // Reject titles that are primarily non-Latin — a strong hallucination signal.
    // Whisper frequently hallucinates CJK/Arabic/Cyrillic text on low-signal audio.
    // We count Latin-script characters (including accented: é, ñ, ł, ü, etc.)
    // rather than raw ASCII to avoid rejecting valid European language titles.
    let alpha_chars: Vec<char> = candidate.chars().filter(|c| c.is_alphabetic()).collect();
    if !alpha_chars.is_empty() {
        let latin_count = alpha_chars
            .iter()
            .filter(|&&c| {
                c.is_ascii_alphabetic()
                    || ('\u{00C0}'..='\u{024F}').contains(&c) // Latin-1 Supplement + Extended-A/B
                    || ('\u{1E00}'..='\u{1EFF}').contains(&c) // Latin Extended Additional
            })
            .count();
        let latin_ratio = latin_count as f64 / alpha_chars.len() as f64;
        if latin_ratio < 0.5 {
            tracing::debug!(
                candidate = %candidate,
                latin_ratio = latin_ratio,
                "rejecting non-Latin title as likely hallucination"
            );
            return None;
        }
    }

    Some(to_display_title(&candidate))
}

pub(crate) fn clean_transcript_line(line: &str) -> Option<String> {
    let mut remaining = line.trim();

    while let Some(rest) = remaining.strip_prefix('[') {
        let bracket_end = rest.find(']')?;
        remaining = rest[bracket_end + 1..].trim();
    }

    let cleaned = normalize_space(remaining);
    if cleaned.is_empty() {
        None
    } else {
        Some(cleaned)
    }
}

fn strip_lead_in_phrase(line: &str) -> String {
    let cleaned = normalize_space(line);
    let lower = cleaned.to_lowercase();
    let prefixes = [
        "we need to discuss ",
        "let's talk about ",
        "lets talk about ",
        "let's discuss ",
        "lets discuss ",
        "i just had an idea about ",
        "i had an idea about ",
        "this is about ",
        "today we're talking about ",
        "today we are talking about ",
        "we're talking about ",
        "we are talking about ",
        "we should talk about ",
        "we should discuss ",
        "i want to talk about ",
        "i want to discuss ",
    ];

    for prefix in prefixes {
        if lower.starts_with(prefix) {
            return cleaned[prefix.len()..].trim().to_string();
        }
    }

    cleaned
}

pub(crate) fn normalize_space(text: &str) -> String {
    text.split_whitespace().collect::<Vec<_>>().join(" ")
}

fn infer_recording_date(
    recorded_at: Option<DateTime<Local>>,
    sidecar: Option<&SidecarMetadata>,
    metadata: &std::fs::Metadata,
) -> DateTime<Local> {
    recorded_at
        .or_else(|| sidecar.and_then(|s| s.captured_at))
        .or_else(|| metadata.created().ok().map(DateTime::<Local>::from))
        .unwrap_or_else(Local::now)
}

fn title_tokens(text: &str) -> BTreeSet<String> {
    const STOPWORDS: &[&str] = &[
        "a", "an", "and", "call", "for", "meeting", "prep", "session", "sync", "the", "to", "with",
    ];

    text.split(|ch: char| !ch.is_alphanumeric())
        .filter_map(|token| {
            let normalized = token.trim().to_lowercase();
            if normalized.len() < 3 || STOPWORDS.contains(&normalized.as_str()) {
                None
            } else {
                Some(normalized)
            }
        })
        .collect()
}

fn title_overlap(a: &str, b: &str) -> usize {
    let a_tokens = title_tokens(a);
    let b_tokens = title_tokens(b);
    a_tokens.intersection(&b_tokens).count()
}

fn select_calendar_event(
    events: &[crate::calendar::CalendarEvent],
    title_override: Option<&str>,
) -> Option<crate::calendar::CalendarEvent> {
    let explicit_title = title_override
        .map(str::trim)
        .filter(|title| !title.is_empty());

    events
        .iter()
        .filter(|event| {
            explicit_title
                .map(|title| title_overlap(title, &event.title) > 0)
                .unwrap_or(true)
        })
        .min_by_key(|event| event.minutes_until.abs())
        .cloned()
}

fn merge_attendees(existing: &[String], additions: &[String]) -> Vec<String> {
    let mut attendees = Vec::new();
    let mut seen_lower = std::collections::HashSet::new();

    for participant in existing.iter().chain(additions.iter()) {
        let Some(normalized) = normalize_attendee_candidate(participant) else {
            continue;
        };
        let lower = normalized.to_lowercase();
        if seen_lower.insert(lower) {
            attendees.push(normalized);
        }
    }
    attendees
}

fn split_decode_hint_fragments(text: &str) -> Vec<String> {
    text.replace(['—', '&', ',', '/'], "|")
        .split('|')
        .flat_map(|part| part.split(" with "))
        .map(str::trim)
        .filter(|part| !part.is_empty())
        .map(|part| part.to_string())
        .collect()
}

pub(crate) fn build_decode_hints(
    title: Option<&str>,
    calendar_event_title: Option<&str>,
    pre_context: Option<&str>,
    attendees: &[String],
    identity: Option<&IdentityConfig>,
    vocabulary: Option<&crate::vocabulary::VocabularyStore>,
) -> crate::transcribe::DecodeHints {
    let mut priority = Vec::new();
    let mut contextual = Vec::new();

    if let Some(identity) = identity.filter(|identity| user_is_participant(attendees, identity)) {
        if let Some(name) = identity
            .name
            .as_deref()
            .map(str::trim)
            .filter(|value| !value.is_empty())
        {
            priority.push(name.to_string());
        }
        for alias in &identity.aliases {
            let normalized = strip_email_domain(strip_name_disambiguation(alias.trim())).trim();
            if !normalized.is_empty() {
                priority.push(normalized.to_string());
            }
        }
    }

    for attendee in attendees {
        if let Some(normalized) = normalize_attendee_candidate(attendee) {
            let canonical = strip_email_domain(strip_name_disambiguation(&normalized)).trim();
            if canonical.is_empty() {
                continue;
            }
            if canonical.contains('.') || canonical.contains('_') {
                let humanized = canonical
                    .split(['.', '_'])
                    .filter(|part| !part.is_empty())
                    .map(capitalize_token)
                    .collect::<Vec<_>>()
                    .join(" ");
                if !humanized.is_empty() {
                    priority.push(humanized);
                    continue;
                }
            }
            priority.push(canonical.to_string());
        }
    }

    if let Some(vocabulary) = vocabulary {
        priority.extend(vocabulary.decode_phrases(8));
    }

    for candidate in title
        .into_iter()
        .chain(calendar_event_title)
        .chain(pre_context)
    {
        contextual.extend(split_decode_hint_fragments(candidate));
    }

    crate::transcribe::DecodeHints::from_candidates(&priority, &contextual)
}

fn load_vocabulary_for_decode_hints() -> Option<crate::vocabulary::VocabularyStore> {
    match crate::vocabulary::load() {
        Ok(store) if !store.entries.is_empty() => Some(store),
        Ok(_) => None,
        Err(error) => {
            tracing::debug!(error = %error, "could not load vocabulary for decode hints");
            None
        }
    }
}

fn collect_user_participant_variants(
    attendees: &[String],
    identity: &IdentityConfig,
) -> Vec<String> {
    let Some(name) = identity
        .name
        .as_deref()
        .map(str::trim)
        .filter(|value| !value.is_empty())
    else {
        return Vec::new();
    };

    let canonical_slug = slugify(name);
    if canonical_slug.is_empty() {
        return Vec::new();
    }

    let canonical_lower = name.to_lowercase();
    let mut variants = Vec::new();
    let mut seen = std::collections::HashSet::new();

    for alias in &identity.aliases {
        let normalized = strip_email_domain(strip_name_disambiguation(alias.trim())).trim();
        if normalized.is_empty() {
            continue;
        }
        let lower = normalized.to_lowercase();
        if lower != canonical_lower && seen.insert(lower) {
            variants.push(normalized.to_string());
        }
    }

    for attendee in attendees {
        let Some(normalized) = normalize_attendee_candidate(attendee) else {
            continue;
        };
        let canonical = strip_email_domain(strip_name_disambiguation(&normalized)).trim();
        if slugify(canonical) != canonical_slug {
            continue;
        }
        let lower = canonical.to_lowercase();
        if lower != canonical_lower && seen.insert(lower) {
            variants.push(canonical.to_string());
        }
    }

    variants
}

fn rewrite_intro_prefix_case_insensitive(
    body: &str,
    prefix: &str,
    variant: &str,
    replacement: &str,
) -> Option<String> {
    if !(body.is_ascii() && prefix.is_ascii() && variant.is_ascii() && replacement.is_ascii()) {
        return None;
    }

    let body_lower = body.to_ascii_lowercase();
    let prefix_lower = prefix.to_ascii_lowercase();
    let variant_lower = variant.to_ascii_lowercase();
    let target = format!("{prefix_lower}{variant_lower}");
    if !body_lower.starts_with(&target) {
        return None;
    }

    let remainder = &body[target.len()..];
    if remainder
        .chars()
        .next()
        .is_some_and(|ch| ch.is_ascii_alphanumeric())
    {
        return None;
    }

    Some(format!(
        "{}{}{}",
        &body[..prefix.len()],
        replacement,
        remainder
    ))
}

fn rewrite_exact_prefix_case_insensitive(
    body: &str,
    target: &str,
    replacement: &str,
) -> Option<String> {
    if !(body.is_ascii() && target.is_ascii() && replacement.is_ascii()) {
        return None;
    }

    let body_lower = body.to_ascii_lowercase();
    let target_lower = target.to_ascii_lowercase();
    if !body_lower.starts_with(&target_lower) {
        return None;
    }

    Some(format!("{}{}", replacement, &body[target.len()..]))
}

fn leading_name_token(text: &str) -> Option<&str> {
    let token = text.split_whitespace().next()?;
    let trimmed = token.trim_matches(|c: char| !c.is_ascii_alphanumeric());
    if trimmed.is_empty() {
        None
    } else {
        Some(trimmed)
    }
}

fn levenshtein_distance_ascii(a: &str, b: &str) -> usize {
    let a_bytes = a.as_bytes();
    let b_bytes = b.as_bytes();
    let mut dp = vec![vec![0usize; b_bytes.len() + 1]; a_bytes.len() + 1];
    for (i, row) in dp.iter_mut().enumerate().take(a_bytes.len() + 1) {
        row[0] = i;
    }
    for (j, cell) in dp[0].iter_mut().enumerate().take(b_bytes.len() + 1) {
        *cell = j;
    }
    for i in 1..=a_bytes.len() {
        for j in 1..=b_bytes.len() {
            let cost = usize::from(a_bytes[i - 1] != b_bytes[j - 1]);
            dp[i][j] = (dp[i - 1][j] + 1)
                .min(dp[i][j - 1] + 1)
                .min(dp[i - 1][j - 1] + cost);
        }
    }
    dp[a_bytes.len()][b_bytes.len()]
}

fn is_safe_self_name_fuzzy_match(token: &str, canonical: &str) -> bool {
    if !(token.is_ascii() && canonical.is_ascii()) {
        return false;
    }
    let token_lower = token.to_ascii_lowercase();
    let canonical_lower = canonical.to_ascii_lowercase();
    if token_lower == canonical_lower {
        return false;
    }
    if token_lower
        .chars()
        .next()
        .zip(canonical_lower.chars().next())
        .is_none_or(|(left, right)| left != right)
    {
        return false;
    }
    if !(token_lower.starts_with(&canonical_lower) || canonical_lower.starts_with(&token_lower)) {
        return false;
    }
    let distance = levenshtein_distance_ascii(&token_lower, &canonical_lower);
    distance <= 1
}

fn rewrite_intro_fuzzy_self_name(body: &str, prefix: &str, canonical: &str) -> Option<String> {
    if !(body.is_ascii() && prefix.is_ascii() && canonical.is_ascii()) {
        return None;
    }
    let body_lower = body.to_ascii_lowercase();
    let prefix_lower = prefix.to_ascii_lowercase();
    if !body_lower.starts_with(&prefix_lower) {
        return None;
    }

    let remainder = &body[prefix.len()..];
    let token = leading_name_token(remainder)?;
    if !is_safe_self_name_fuzzy_match(token, canonical) {
        return None;
    }
    let token_start = prefix.len();
    let token_end = token_start + token.len();
    Some(format!(
        "{}{}{}",
        &body[..token_start],
        canonical,
        &body[token_end..]
    ))
}

fn normalize_self_name_refs_in_transcript(
    transcript: &str,
    canonical: &str,
    variants: &[String],
) -> String {
    if canonical.trim().is_empty() {
        return transcript.to_string();
    }

    let intro_prefixes = [
        "this is ",
        "hey, this is ",
        "hey this is ",
        "okay, this is ",
        "ok, this is ",
        "all right, this is ",
        "alright, this is ",
    ];

    let mut out = Vec::new();
    for line in transcript.lines() {
        if let Some((head, body)) = line.split_once("] ") {
            let mut rewritten = None;
            for variant in variants {
                for prefix in intro_prefixes {
                    if let Some(new_body) =
                        rewrite_intro_prefix_case_insensitive(body, prefix, variant, canonical)
                    {
                        rewritten = Some(new_body);
                        break;
                    }
                }
                if rewritten.is_none() {
                    let pattern = format!("{variant} is ");
                    let replacement = format!("{canonical} is ");
                    if let Some(new_body) =
                        rewrite_exact_prefix_case_insensitive(body, &pattern, &replacement)
                    {
                        rewritten = Some(new_body);
                    }
                }
                if rewritten.is_some() {
                    break;
                }
            }
            if rewritten.is_none() {
                for prefix in intro_prefixes {
                    if let Some(new_body) = rewrite_intro_fuzzy_self_name(body, prefix, canonical) {
                        rewritten = Some(new_body);
                        break;
                    }
                }
            }
            if rewritten.is_none() {
                let lower = body.to_ascii_lowercase();
                if let Some(position) = lower.find(" is ") {
                    let token = body[..position].trim_matches(|c: char| !c.is_ascii_alphanumeric());
                    if is_safe_self_name_fuzzy_match(token, canonical) {
                        rewritten = Some(format!("{canonical}{}", &body[position..]));
                    }
                }
            }
            if let Some(new_body) = rewritten {
                out.push(format!("{head}] {new_body}"));
                continue;
            }
        }
        out.push(line.to_string());
    }

    if transcript.ends_with('\n') {
        format!("{}\n", out.join("\n"))
    } else {
        out.join("\n")
    }
}

pub(crate) fn normalize_transcript_for_self_name_participant(
    transcript: &str,
    attendees: &[String],
    identity: &IdentityConfig,
) -> String {
    if !user_is_participant(attendees, identity) {
        return transcript.to_string();
    }

    let Some(canonical) = identity
        .name
        .as_deref()
        .map(str::trim)
        .filter(|value| !value.is_empty())
    else {
        return transcript.to_string();
    };

    let variants = collect_user_participant_variants(attendees, identity);
    normalize_self_name_refs_in_transcript(transcript, canonical, &variants)
}

fn user_is_participant(attendees: &[String], identity: &IdentityConfig) -> bool {
    let Some(name) = identity
        .name
        .as_deref()
        .map(str::trim)
        .filter(|value| !value.is_empty())
    else {
        return false;
    };

    let canonical_slug = slugify(name);
    if canonical_slug.is_empty() {
        return false;
    }

    let mut participant_slugs = std::collections::HashSet::new();
    participant_slugs.insert(canonical_slug.clone());
    for alias in identity.all_user_aliases() {
        let normalized = strip_email_domain(strip_name_disambiguation(alias.trim())).trim();
        let slug = slugify(normalized);
        if !slug.is_empty() {
            participant_slugs.insert(slug);
        }
    }

    attendees.iter().any(|attendee| {
        normalize_attendee_candidate(attendee).is_some_and(|normalized| {
            let canonical = strip_email_domain(strip_name_disambiguation(&normalized)).trim();
            let slug = slugify(canonical);
            !slug.is_empty() && participant_slugs.contains(&slug)
        })
    })
}

#[derive(Debug, Clone, PartialEq, Eq)]
struct ParsedSpeakerReference<'a> {
    label: String,
    name_hint: Option<&'a str>,
}

fn parse_speaker_reference(raw: &str) -> Option<ParsedSpeakerReference<'_>> {
    let trimmed = raw.trim().trim_start_matches('@').trim();
    if trimmed.is_empty() {
        return None;
    }

    let lower = trimmed.to_ascii_lowercase();
    if !lower.starts_with("speaker") {
        return None;
    }

    let suffix = &trimmed["speaker".len()..];
    let suffix = suffix.trim_start_matches(['_', ' ']);
    let digits_len = suffix.chars().take_while(|c| c.is_ascii_digit()).count();
    if digits_len == 0 {
        return None;
    }

    let label = format!("SPEAKER_{}", &suffix[..digits_len]);
    let rest = suffix[digits_len..].trim();
    let name_hint = if let Some(name) = rest.strip_prefix('/') {
        let name = name.trim();
        (!name.is_empty()).then_some(name)
    } else if rest.starts_with('(') && rest.ends_with(')') {
        let name = rest.trim_start_matches('(').trim_end_matches(')').trim();
        (!name.is_empty()).then_some(name)
    } else {
        None
    };

    Some(ParsedSpeakerReference { label, name_hint })
}

fn normalize_attendee_candidate(raw: &str) -> Option<String> {
    let trimmed = raw.trim();
    if trimmed.is_empty() {
        return None;
    }

    if let Some(reference) = parse_speaker_reference(trimmed) {
        return reference.name_hint.map(str::to_string);
    }

    Some(strip_name_disambiguation(trimmed).to_string())
}

fn resolve_speaker_reference(
    raw: &str,
    speaker_map: &[diarize::SpeakerAttribution],
    include_confidence_hint: bool,
) -> Option<String> {
    let reference = parse_speaker_reference(raw)?;
    let mapped = speaker_map
        .iter()
        .find(|attr| attr.speaker_label.eq_ignore_ascii_case(&reference.label));

    match mapped {
        Some(attr) if include_confidence_hint && attr.confidence != diarize::Confidence::High => {
            Some(format!("{} ({})", attr.name, attr.speaker_label))
        }
        Some(attr) => Some(attr.name.clone()),
        None => reference.name_hint.map(str::to_string),
    }
}

fn normalize_attendees_with_speaker_map(
    attendees: &[String],
    speaker_map: &[diarize::SpeakerAttribution],
) -> Vec<String> {
    let mut normalized = Vec::new();
    let mut seen = std::collections::HashSet::new();

    for attendee in attendees {
        let cleaned = match resolve_speaker_reference(attendee, speaker_map, false)
            .or_else(|| normalize_attendee_candidate(attendee))
        {
            Some(cleaned) => cleaned,
            None if parse_speaker_reference(attendee).is_some() => continue,
            None => attendee.trim().to_string(),
        };
        if cleaned.is_empty() {
            continue;
        }

        let key = cleaned.to_lowercase();
        if seen.insert(key) {
            normalized.push(cleaned);
        }
    }

    normalized
}

fn normalize_action_items_with_speaker_map(
    action_items: Vec<markdown::ActionItem>,
    speaker_map: &[diarize::SpeakerAttribution],
) -> Vec<markdown::ActionItem> {
    action_items
        .into_iter()
        .map(|mut item| {
            if let Some(assignee) = resolve_speaker_reference(&item.assignee, speaker_map, true) {
                item.assignee = assignee;
            }
            item
        })
        .collect()
}

fn normalize_decisions_with_speaker_map(
    decisions: Vec<markdown::Decision>,
    speaker_map: &[diarize::SpeakerAttribution],
) -> Vec<markdown::Decision> {
    decisions
        .into_iter()
        .map(|mut decision| {
            if let Some(topic) = decision.topic.as_deref() {
                if let Some(resolved) = resolve_speaker_reference(topic, speaker_map, true) {
                    decision.topic = Some(resolved);
                }
            }
            decision
        })
        .collect()
}

fn normalize_intents_with_speaker_map(
    intents: Vec<markdown::Intent>,
    speaker_map: &[diarize::SpeakerAttribution],
) -> Vec<markdown::Intent> {
    intents
        .into_iter()
        .map(|mut intent| {
            intent.who = intent
                .who
                .as_deref()
                .and_then(|who| resolve_speaker_reference(who, speaker_map, true))
                .or(intent.who);
            intent
        })
        .collect()
}

fn strip_conversational_prefixes(line: &str) -> String {
    let mut remaining = line.trim();
    let fillers = ["okay", "ok", "so", "well", "alright", "all right"];

    loop {
        let lower = remaining.to_lowercase();
        let mut stripped = false;

        for filler in fillers {
            if let Some(rest) = lower.strip_prefix(filler) {
                if rest.is_empty() {
                    return String::new();
                }

                if rest.starts_with(|c: char| {
                    c == ',' || c == '.' || c == '!' || c == '?' || c.is_whitespace()
                }) {
                    remaining = remaining[filler.len()..]
                        .trim_start_matches(|c: char| {
                            c == ',' || c == '.' || c == '!' || c == '?' || c.is_whitespace()
                        })
                        .trim_start();
                    stripped = true;
                    break;
                }
            }
        }

        if !stripped {
            return remaining.to_string();
        }
    }
}

fn transcript_title_words(candidate: &str) -> Vec<String> {
    candidate
        .split_whitespace()
        .map(|word| {
            word.trim_matches(|c: char| !c.is_alphanumeric() && c != '\'' && c != '-')
                .to_lowercase()
        })
        .filter(|word| !word.is_empty())
        .collect()
}

fn is_unusable_transcript_title(candidate: &str) -> bool {
    let words = transcript_title_words(candidate);
    if words.is_empty() {
        return true;
    }

    let lower = words.join(" ");
    let greetings = ["hey", "hi", "hello"];
    if greetings.contains(&words[0].as_str()) && words.len() <= 4 {
        return true;
    }

    let generic_prefixes = [
        "this is a meeting",
        "this is the meeting",
        "this is a call",
        "this is the call",
        "this is a recording",
        "this is the recording",
        "this is a test",
        "this is just a test",
    ];
    if generic_prefixes
        .iter()
        .any(|prefix| lower.starts_with(prefix))
    {
        return true;
    }

    let generic_words = [
        "a",
        "all",
        "alright",
        "and",
        "be",
        "call",
        "doing",
        "for",
        "gonna",
        "going",
        "here",
        "is",
        "just",
        "meeting",
        "now",
        "ok",
        "okay",
        "recording",
        "right",
        "so",
        "test",
        "that",
        "the",
        "this",
        "uh",
        "um",
        "we",
        "we're",
        "well",
    ];
    let informative_words: Vec<&String> = words
        .iter()
        .filter(|word| !generic_words.contains(&word.as_str()))
        .collect();

    informative_words.is_empty()
}

fn to_display_title(text: &str) -> String {
    let trimmed = text
        .trim_matches(|c: char| c.is_ascii_punctuation() || c.is_whitespace())
        .split(['.', '!', '?', '\n'])
        .next()
        .unwrap_or("")
        .trim();

    let stopwords = [
        "a", "an", "and", "as", "at", "by", "for", "from", "in", "of", "on", "or", "the", "to",
        "with",
    ];

    trimmed
        .split_whitespace()
        .enumerate()
        .map(|(idx, word)| {
            let lower = word.to_lowercase();
            let is_edge = idx == 0;
            if word.chars().any(|c| c.is_ascii_digit())
                || word
                    .chars()
                    .all(|c| !c.is_ascii_lowercase() || !c.is_ascii_uppercase())
                    && word.chars().filter(|c| c.is_ascii_uppercase()).count() > 1
            {
                word.to_string()
            } else if !is_edge && stopwords.contains(&lower.as_str()) {
                lower
            } else {
                let mut chars = lower.chars();
                match chars.next() {
                    Some(first) => first.to_uppercase().collect::<String>() + chars.as_str(),
                    None => String::new(),
                }
            }
        })
        .collect::<Vec<_>>()
        .join(" ")
}

fn finalize_title(title: String) -> String {
    if title.chars().count() > 60 {
        let truncated: String = title.chars().take(57).collect();
        format!("{}...", truncated)
    } else {
        title
    }
}

/// Extract structured action items from a Summary.
/// Parses lines like "- @user: Send pricing doc by Friday" into ActionItem structs.
fn extract_action_items(summary: &summarize::Summary) -> Vec<markdown::ActionItem> {
    summary
        .action_items
        .iter()
        .map(|item| {
            let (assignee, task) = if let Some(rest) = item.strip_prefix('@') {
                // "@user: Send pricing doc by Friday"
                if let Some(colon_pos) = rest.find(':') {
                    (
                        rest[..colon_pos].trim().to_string(),
                        rest[colon_pos + 1..].trim().to_string(),
                    )
                } else {
                    ("unassigned".to_string(), item.clone())
                }
            } else {
                ("unassigned".to_string(), item.clone())
            };

            // Try to extract due date from phrases like "by Friday", "(due March 21)"
            let due = extract_due_date(&task);

            markdown::ActionItem {
                assignee,
                task: task.trim_end_matches(')').trim().to_string(),
                due,
                status: "open".to_string(),
            }
        })
        .collect()
}

/// Extract structured decisions from a Summary.
fn extract_decisions(summary: &summarize::Summary) -> Vec<markdown::Decision> {
    summary
        .decisions
        .iter()
        .map(|text| {
            // Try to infer topic from the first few words
            let topic = infer_topic(text);
            markdown::Decision {
                text: text.clone(),
                topic,
                authority: None,
                supersedes: None,
            }
        })
        .collect()
}

fn parse_actor_prefix(text: &str) -> (Option<String>, String) {
    if let Some(rest) = text.strip_prefix('@') {
        if let Some(colon_pos) = rest.find(':') {
            let who = rest[..colon_pos].trim();
            let what = rest[colon_pos + 1..].trim();
            return ((!who.is_empty()).then(|| who.to_string()), what.to_string());
        }
    }
    (None, text.trim().to_string())
}

fn extract_intents(summary: &summarize::Summary) -> Vec<markdown::Intent> {
    let mut intents = Vec::new();

    for item in extract_action_items(summary) {
        intents.push(markdown::Intent {
            kind: markdown::IntentKind::ActionItem,
            what: item.task,
            who: (item.assignee != "unassigned").then_some(item.assignee),
            status: item.status,
            by_date: item.due,
        });
    }

    for decision in extract_decisions(summary) {
        intents.push(markdown::Intent {
            kind: markdown::IntentKind::Decision,
            what: decision.text,
            who: None,
            status: "decided".into(),
            by_date: None,
        });
    }

    for question in &summary.open_questions {
        let (who, what) = parse_actor_prefix(question);
        intents.push(markdown::Intent {
            kind: markdown::IntentKind::OpenQuestion,
            what,
            who,
            status: "open".into(),
            by_date: None,
        });
    }

    for commitment in &summary.commitments {
        let due = extract_due_date(commitment);
        let (who, what) = parse_actor_prefix(commitment);
        intents.push(markdown::Intent {
            kind: markdown::IntentKind::Commitment,
            what: what.trim_end_matches(')').trim().to_string(),
            who,
            status: "open".into(),
            by_date: due,
        });
    }

    intents
}

/// Try to extract a due date from action item text.
/// Matches patterns like "by Friday", "by March 21", "(due 2026-03-21)".
fn extract_due_date(text: &str) -> Option<String> {
    let lower = text.to_lowercase();

    // "by Friday", "by next week", "by March 21"
    if let Some(pos) = lower.find(" by ") {
        let after = &text[pos + 4..];
        let due: String = after
            .chars()
            .take_while(|c| c.is_alphanumeric() || *c == ' ' || *c == '-')
            .collect();
        let due = due.trim().to_string();
        if !due.is_empty() {
            return Some(due);
        }
    }

    // "(due March 21)"
    if let Some(pos) = lower.find("due ") {
        let after = &text[pos + 4..];
        let due: String = after
            .chars()
            .take_while(|c| c.is_alphanumeric() || *c == ' ' || *c == '-')
            .collect();
        let due = due.trim().to_string();
        if !due.is_empty() {
            return Some(due);
        }
    }

    None
}

/// Infer a topic from decision text by extracting the first noun phrase.
fn infer_topic(text: &str) -> Option<String> {
    // Simple heuristic: use the first 3-5 meaningful words as the topic
    let words: Vec<&str> = text
        .split_whitespace()
        .filter(|w| {
            let lower = w.to_lowercase();
            !matches!(
                lower.as_str(),
                "the"
                    | "a"
                    | "an"
                    | "to"
                    | "for"
                    | "of"
                    | "in"
                    | "on"
                    | "at"
                    | "is"
                    | "was"
                    | "will"
                    | "should"
                    | "we"
                    | "they"
                    | "it"
            )
        })
        .take(4)
        .collect();

    if words.is_empty() {
        return None;
    }

    let candidate = words.join(" ").to_lowercase();
    (!is_task_like_project_candidate(&candidate, Some(text))).then_some(candidate)
}

#[allow(clippy::too_many_arguments)]
fn build_entity_links(
    title: &str,
    pre_context: Option<&str>,
    attendees: &[String],
    action_items: &[markdown::ActionItem],
    decisions: &[markdown::Decision],
    intents: &[markdown::Intent],
    tags: &[String],
    identity: Option<&IdentityConfig>,
) -> markdown::EntityLinks {
    let mut people: BTreeMap<String, (String, BTreeSet<String>)> = BTreeMap::new();
    let mut projects: BTreeMap<String, (String, BTreeSet<String>)> = BTreeMap::new();

    for attendee in attendees {
        add_person_entity(&mut people, attendee);
    }
    for item in action_items {
        add_person_entity(&mut people, &item.assignee);
    }
    for intent in intents {
        if let Some(who) = &intent.who {
            add_person_entity(&mut people, who);
        }
    }

    if let Some(identity) = identity {
        fold_user_identity(&mut people, identity);
    }

    for decision in decisions {
        if let Some(topic) = &decision.topic {
            add_project_entity(&mut projects, topic, Some(&decision.text));
        } else {
            add_project_entity(&mut projects, &decision.text, None);
        }
    }
    if let Some(context) = pre_context {
        add_project_entity(&mut projects, context, None);
    }
    add_project_entity(&mut projects, title, None);
    for tag in tags {
        add_project_entity(&mut projects, tag, None);
    }

    markdown::EntityLinks {
        people: people
            .into_iter()
            .map(|(slug, (label, aliases))| markdown::EntityRef {
                slug,
                label,
                aliases: aliases.into_iter().collect(),
            })
            .collect(),
        projects: projects
            .into_iter()
            .map(|(slug, (label, aliases))| markdown::EntityRef {
                slug,
                label,
                aliases: aliases.into_iter().collect(),
            })
            .collect(),
    }
}

/// Fold any person entity that matches a configured user email or alias
/// onto the canonical user entity (keyed by `slugify(identity.name)`).
///
/// Covers the common case of one human appearing under several labels
/// in a single meeting — e.g. recorded by "Mat", attending as
/// "mathieu@work.com" on one calendar and "mat@personal.com" on
/// another, mentioned in transcript as "Mathieu". Without this fold,
/// each surface spawns its own entity and both the markdown frontmatter
/// and `graph.db` end up with duplicate Person rows that compound on
/// every rerun. Non-user entities are unaffected.
fn fold_user_identity(
    people: &mut BTreeMap<String, (String, BTreeSet<String>)>,
    identity: &IdentityConfig,
) {
    let Some(name) = identity
        .name
        .as_ref()
        .map(|n| n.trim())
        .filter(|n| !n.is_empty())
    else {
        return;
    };
    let canonical_slug = slugify(name);
    if canonical_slug.is_empty() {
        return;
    }
    // Only fold when the user is actually a participant in this meeting.
    // If the canonical entry doesn't exist, don't invent it — the meeting
    // may genuinely not include the user (a recorded third-party call,
    // say).
    if !people.contains_key(&canonical_slug) {
        return;
    }

    let alias_slugs: Vec<String> = identity
        .all_user_aliases()
        .into_iter()
        .filter_map(|alias| {
            let canonical = strip_email_domain(strip_name_disambiguation(alias.trim())).trim();
            if canonical.is_empty() {
                return None;
            }
            let label: String = canonical
                .split_whitespace()
                .map(capitalize_token)
                .collect::<Vec<_>>()
                .join(" ");
            let slug = slugify(&label);
            if slug.is_empty() || slug == canonical_slug {
                None
            } else {
                Some(slug)
            }
        })
        .collect();

    for slug in alias_slugs {
        if let Some((label, aliases)) = people.remove(&slug) {
            let canonical_entry = people
                .get_mut(&canonical_slug)
                .expect("canonical slug was verified to exist above");
            canonical_entry.1.insert(label.to_ascii_lowercase());
            canonical_entry.1.extend(aliases);
        }
    }
}

fn derive_structured_tags(
    content_type: ContentType,
    source: Option<&str>,
    device: Option<&str>,
    entities: &markdown::EntityLinks,
    decisions: &[markdown::Decision],
    intents: &[markdown::Intent],
) -> Vec<String> {
    let mut tags = Vec::new();
    let mut seen = BTreeSet::new();
    let mut push_tag = |tag: String| {
        if seen.insert(tag.clone()) {
            tags.push(tag);
        }
    };

    if content_type == ContentType::Memo {
        push_tag("memo".to_string());

        if let Some(source) = source.filter(|value| !value.trim().is_empty()) {
            push_tag(format!(
                "source:{}",
                normalize_entity_topic(source).replace(' ', "-")
            ));
        }

        if let Some(device) = device.filter(|value| !value.trim().is_empty()) {
            let normalized = normalize_entity_topic(device).replace(' ', "-");
            if !normalized.is_empty() {
                push_tag(format!("device:{normalized}"));
            }
        }

        if intents.iter().any(|intent| {
            matches!(
                intent.kind,
                markdown::IntentKind::Commitment | markdown::IntentKind::ActionItem
            )
        }) {
            push_tag("has-actions".into());
        }
        if !decisions.is_empty() {
            push_tag("has-decisions".into());
        }

        for entity in entities.people.iter().take(3) {
            push_tag(format!("person:{}", entity.slug));
        }

        for decision in decisions.iter().take(3) {
            if let Some(topic) = decision
                .topic
                .as_ref()
                .filter(|value| !value.trim().is_empty())
            {
                push_tag(format!("topic:{}", slugify(topic)));
            }
        }

        for entity in entities.projects.iter().take(4) {
            push_tag(format!("project:{}", entity.slug));
        }
    }

    tags.into_iter().take(8).collect()
}

fn add_person_entity(entities: &mut BTreeMap<String, (String, BTreeSet<String>)>, raw: &str) {
    let Some(trimmed) = (match resolve_speaker_reference(raw, &[], false) {
        Some(name) => Some(name),
        None => {
            let trimmed = raw.trim().trim_start_matches('@').trim();
            if parse_speaker_reference(trimmed).is_some() {
                None
            } else {
                Some(trimmed.to_string())
            }
        }
    }) else {
        return;
    };
    if trimmed.is_empty() || trimmed.eq_ignore_ascii_case("unassigned") {
        return;
    }

    let canonical = strip_email_domain(strip_name_disambiguation(&trimmed)).trim();
    if canonical.is_empty() {
        return;
    }

    let label = canonical
        .split_whitespace()
        .map(capitalize_token)
        .collect::<Vec<_>>()
        .join(" ");
    let slug = slugify(&label);
    if slug.is_empty() {
        return;
    }

    let entry = entities
        .entry(slug)
        .or_insert_with(|| (label.clone(), BTreeSet::new()));
    entry.1.insert(canonical.to_lowercase());
    if trimmed != canonical {
        entry.1.insert(trimmed.to_lowercase());
    }
    let raw_trimmed = raw.trim();
    if raw_trimmed != trimmed && raw_trimmed != canonical {
        entry.1.insert(raw_trimmed.to_lowercase());
    }
}

/// Strip a " / Other" disambiguation suffix, returning the canonical head.
/// Example: `"Mat / Matthew"` → `"Mat"`. If no separator is present, returns
/// the input unchanged. The LLM sometimes produces hedged names during
/// speaker attribution; the head is always the best guess.
fn strip_name_disambiguation(s: &str) -> &str {
    match s.split_once(" / ") {
        Some((head, _)) => head.trim_end(),
        None => s,
    }
}

/// If the string is an email address (`local@domain.tld`), return just the
/// local part. Otherwise return the input unchanged. This prevents email
/// forms from spawning separate person entities when the same human also
/// appears by display name elsewhere in the meeting.
fn strip_email_domain(s: &str) -> &str {
    if let Some((local, domain)) = s.split_once('@') {
        if !local.is_empty() && domain.contains('.') {
            return local;
        }
    }
    s
}

fn add_project_entity(
    entities: &mut BTreeMap<String, (String, BTreeSet<String>)>,
    raw: &str,
    alias_source: Option<&str>,
) {
    let normalized = normalize_entity_topic(raw);
    if normalized.is_empty() {
        return;
    }

    if is_task_like_project_candidate(&normalized, alias_source.or(Some(raw))) {
        return;
    }

    let generic = [
        "untitled recording",
        "follow up",
        "another follow up",
        "voice memo",
        "meeting",
        "recording",
    ];
    if generic.contains(&normalized.as_str()) {
        return;
    }

    let label = normalized
        .split_whitespace()
        .map(capitalize_token)
        .collect::<Vec<_>>()
        .join(" ");
    let slug = slugify(&label);
    if slug.is_empty() {
        return;
    }

    let entry = entities
        .entry(slug)
        .or_insert_with(|| (label.clone(), BTreeSet::new()));
    entry.1.insert(normalized.clone());
    if let Some(alias) = alias_source {
        let cleaned = normalize_space(alias);
        if !cleaned.is_empty() {
            entry.1.insert(cleaned.to_lowercase());
        }
    }
}

fn capitalize_token(token: &str) -> String {
    let lower = token.to_lowercase();
    let mut chars = lower.chars();
    match chars.next() {
        Some(first) => first.to_uppercase().collect::<String>() + chars.as_str(),
        None => String::new(),
    }
}

fn slugify(text: &str) -> String {
    text.to_lowercase()
        .chars()
        .map(|c| if c.is_alphanumeric() { c } else { '-' })
        .collect::<String>()
        .split('-')
        .filter(|segment| !segment.is_empty())
        .collect::<Vec<_>>()
        .join("-")
}

fn normalize_entity_topic(text: &str) -> String {
    let stopwords = [
        "a", "an", "and", "as", "at", "by", "for", "from", "in", "of", "on", "or", "the", "to",
        "with", "we", "should", "will", "be", "is", "are", "use", "using",
    ];

    text.split_whitespace()
        .map(|word| word.trim_matches(|c: char| !c.is_alphanumeric()))
        .filter(|word| !word.is_empty())
        .filter(|word| !stopwords.contains(&word.to_lowercase().as_str()))
        .take(4)
        .map(|word| word.to_lowercase())
        .collect::<Vec<_>>()
        .join(" ")
}

fn is_task_like_project_candidate(normalized: &str, source: Option<&str>) -> bool {
    const ACTION_VERBS: &[&str] = &[
        "add", "ask", "asked", "build", "call", "check", "confirm", "create", "deliver", "email",
        "follow", "provide", "reach", "review", "run", "schedule", "send", "share", "study",
        "update",
    ];
    const TASK_START_RED_FLAGS: &[&str] = &[
        "a", "an", "the", "to", "my", "our", "your", "his", "her", "their", "this", "that",
        "these", "those", "me", "us", "him", "them",
    ];

    if parse_speaker_reference(normalized).is_some() {
        return true;
    }

    let words: Vec<&str> = normalized.split_whitespace().collect();
    if words.is_empty() {
        return true;
    }

    let verb_hits = words
        .iter()
        .filter(|word| ACTION_VERBS.contains(word))
        .count();

    if normalized.contains("reach out") || normalized.contains("follow up") {
        return true;
    }

    let source_words: Vec<String> = source
        .unwrap_or(normalized)
        .split_whitespace()
        .map(|word| {
            word.trim_matches(|c: char| !c.is_alphanumeric())
                .to_lowercase()
        })
        .filter(|word| !word.is_empty())
        .collect();

    let starts_with_action = ACTION_VERBS.contains(&words[0]);
    if starts_with_action {
        if words.len() == 1 {
            return true;
        }

        let has_follow_on_signal = source_words.len() > words.len()
            || source_words
                .get(1)
                .is_some_and(|word| TASK_START_RED_FLAGS.contains(&word.as_str()));

        if has_follow_on_signal || verb_hits >= 2 {
            return true;
        }
    }

    verb_hits >= 2
}

/// Execute the post_record hook if configured.
/// Runs the command asynchronously in the background with the transcript path as argument.
pub fn run_post_record_hook(config: &Config, transcript_path: &Path) {
    if let Some(ref command) = config.hooks.post_record {
        let cmd = command.clone();
        let path = transcript_path.display().to_string();
        std::thread::spawn(move || {
            tracing::info!(command = %cmd, path = %path, "running post_record hook");
            match std::process::Command::new("sh")
                .arg("-c")
                .arg(format!("{} \"$1\"", cmd))
                .arg("--")
                .arg(&path)
                .stdout(std::process::Stdio::piped())
                .stderr(std::process::Stdio::piped())
                .output()
            {
                Ok(output) => {
                    if !output.status.success() {
                        let stderr = String::from_utf8_lossy(&output.stderr);
                        tracing::warn!(
                            command = %cmd,
                            exit_code = output.status.code(),
                            stderr = %stderr,
                            "post_record hook failed"
                        );
                    } else {
                        tracing::info!(command = %cmd, "post_record hook completed");
                    }
                }
                Err(error) => {
                    tracing::warn!(command = %cmd, error = %error, "post_record hook spawn failed");
                }
            }
        });
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    fn sparse_health(voice: f32, system: f32) -> markdown::RecordingHealth {
        markdown::RecordingHealth {
            voice_stem_active_ratio: Some(voice),
            system_stem_active_ratio: Some(system),
            system_dominant_ratio: None,
            capture_warnings: vec![],
            diarization_path: None,
        }
    }

    #[test]
    fn suppress_if_all_noise_fires_on_all_noise_with_sparse_stems() {
        // The exact failure case from issue #241.
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n";
        let health = sparse_health(0.005, 0.001);
        let diagnosis = suppress_if_all_noise(transcript, Some(&health));
        assert!(diagnosis.is_some(), "expected suppression diagnosis");
        let msg = diagnosis.unwrap();
        assert!(msg.contains("all-noise"), "msg: {}", msg);
        assert!(msg.contains("threshold"), "msg: {}", msg);
    }

    #[test]
    fn suppress_if_all_noise_holds_off_when_stems_have_signal() {
        // Stems are above the sparse threshold - we lack the corroborating
        // capture-side evidence, so let the transcript through even if it
        // looks all-noise. Better to surface the suspicious lines than to
        // hide real (if brief) capture.
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n";
        let health = sparse_health(0.5, 0.4);
        assert!(suppress_if_all_noise(transcript, Some(&health)).is_none());
    }

    #[test]
    fn suppress_if_all_noise_holds_off_when_only_one_stem_is_sparse() {
        // Asymmetric capture (one side silent, one side active) is a
        // different failure mode - we trust the active side and don't
        // suppress here.
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n";
        let health = sparse_health(0.001, 0.5);
        assert!(suppress_if_all_noise(transcript, Some(&health)).is_none());
    }

    #[test]
    fn suppress_if_all_noise_holds_off_with_real_content() {
        // Real speech, even with a noise marker mixed in, is left alone.
        let transcript = "[0:00] Hello world\n[0:05] (crying)\n[0:10] Goodbye\n";
        let health = sparse_health(0.001, 0.001);
        assert!(suppress_if_all_noise(transcript, Some(&health)).is_none());
    }

    #[test]
    fn suppress_if_all_noise_holds_off_without_health() {
        // No recording_health (e.g. dictation, or a test fixture) means we
        // can't confirm the stems were sparse. Be conservative.
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n";
        assert!(suppress_if_all_noise(transcript, None).is_none());
    }

    #[test]
    fn suppress_if_all_noise_holds_off_with_partial_health() {
        // Only one stem ratio captured - inconclusive, don't suppress.
        let mut health = sparse_health(0.001, 0.001);
        health.system_stem_active_ratio = None;
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n";
        assert!(suppress_if_all_noise(transcript, Some(&health)).is_none());
    }

    #[test]
    fn should_suppress_transcript_wraps_decision_in_outcome() {
        // The shared helper returns the same body+diagnosis used by BOTH
        // `write_transcript_artifact` and the `process` path. This is the
        // single source of truth that closes codex blocker #2 - both call
        // sites must produce identical suppression output.
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n";
        let health = sparse_health(0.005, 0.001);
        let outcome = should_suppress_transcript(transcript, Some(&health))
            .expect("expected suppression outcome");
        assert_eq!(outcome.body, ALL_NOISE_SUPPRESSED_BODY);
        assert!(outcome.diagnosis.contains("all-noise"));
        assert!(outcome.diagnosis.contains("threshold"));
    }

    #[test]
    fn should_suppress_transcript_returns_none_with_real_content() {
        let transcript = "[0:00] Hello world\n[0:05] Goodbye\n";
        let health = sparse_health(0.001, 0.001);
        assert!(should_suppress_transcript(transcript, Some(&health)).is_none());
    }

    // ── Summarization-degradation detection (issue #243) ──

    #[test]
    fn detect_summarization_warnings_returns_empty_when_engine_none() {
        // When summarization is disabled by config, an absent summary is
        // expected behavior, not a degradation.
        let warnings = detect_summarization_warnings(None, "none", "claude", 300, false);
        assert!(warnings.is_empty());
    }

    #[test]
    fn detect_summarization_warnings_returns_empty_when_summary_present() {
        let summary = "Some real summary content";
        let warnings = detect_summarization_warnings(Some(summary), "agent", "opencode", 300, true);
        assert!(warnings.is_empty());
    }

    #[test]
    fn detect_summarization_warnings_returns_empty_when_not_attempted() {
        // Codex review of v1 (PR #249) caught this: when the no-speech /
        // all-noise gate prevents summarization from running, summary is
        // None but that is expected, not a degradation. The helper must
        // not emit a bogus `summarize_failed` warning in that case.
        let warnings = detect_summarization_warnings(None, "agent", "opencode", 300, false);
        assert!(warnings.is_empty());
    }

    #[test]
    fn detect_summarization_warnings_stays_silent_for_every_engine_when_not_attempted() {
        // This is a contract test on the helper itself, not an end-to-end
        // integration test. Both call sites (write_transcript_artifact and
        // process_with_progress_and_sidecar) rely on this invariant when
        // their upstream no-speech / all-noise gate fires: pass
        // `summarization_attempted = false` and trust the helper to return
        // zero warnings regardless of the configured engine. If any engine
        // value leaked a warning here, the upstream short-circuit would be
        // insufficient and the frontmatter would gain a bogus
        // `summarize_failed` entry on no-speech recordings.
        for (engine, agent_cmd) in [
            ("agent", "opencode"),
            ("auto", "claude"),
            ("claude", "claude"),
        ] {
            let warnings = detect_summarization_warnings(None, engine, agent_cmd, 300, false);
            assert!(
                warnings.is_empty(),
                "engine={} produced warnings when not attempted: {:?}",
                engine,
                warnings
            );
        }
    }

    #[test]
    fn detect_summarization_warnings_flags_agent_failure_with_timeout_context() {
        // The #243 failure shape: engine = "agent", summary is None,
        // summarization was actually attempted.
        let warnings = detect_summarization_warnings(None, "agent", "opencode", 300, true);
        assert_eq!(warnings.len(), 1);
        assert_eq!(warnings[0].step, "summarize");
        assert_eq!(warnings[0].reason, "summarize_failed");
        assert_eq!(warnings[0].timeout_secs, Some(300));
        let msg = warnings[0].message.as_ref().expect("message set");
        assert!(msg.contains("opencode"));
        assert!(msg.contains("300s"));
    }

    #[test]
    fn detect_summarization_warnings_auto_engine_message_explains_indirection() {
        // Codex review of v1 (PR #249) caught this: when engine = "auto",
        // the warning previously printed `agent_command` even though auto
        // detects a CLI at runtime. The message must surface the auto
        // indirection and tell the user to check audio.log for which
        // agent was selected.
        let warnings = detect_summarization_warnings(None, "auto", "claude", 600, true);
        assert_eq!(warnings.len(), 1);
        let msg = warnings[0].message.as_ref().unwrap();
        assert!(msg.contains("auto"));
        assert!(msg.contains("600s"));
        assert!(msg.contains("audio.log"));
        assert_eq!(warnings[0].timeout_secs, Some(600));
    }

    #[test]
    fn detect_summarization_warnings_flags_non_agent_engine_without_timeout() {
        // Non-agent engines (claude, ollama, mistral, etc.) don't have a
        // single agent_timeout_secs knob, so the warning carries no
        // timeout_secs field but still flags the degradation.
        let warnings = detect_summarization_warnings(None, "claude", "claude", 300, true);
        assert_eq!(warnings.len(), 1);
        assert_eq!(warnings[0].step, "summarize");
        assert_eq!(warnings[0].timeout_secs, None);
        assert!(warnings[0]
            .message
            .as_ref()
            .unwrap()
            .contains("engine `claude`"));
    }

    /// Simulates the branch logic the `process` path applies after
    /// diarization: if `should_suppress_transcript` fires, the transcript
    /// body, status, and forced filter_diagnosis are all updated together.
    /// This mirrors lines around 1790 of `process_with_progress_and_sidecar`.
    /// We can't run the full pipeline in a unit test (whisper model, audio
    /// file, calendar lookup), but we CAN assert the decision-and-apply
    /// logic produces exactly the same observable state as the
    /// `write_transcript_artifact` path for the same input.
    fn apply_suppression_on_process_path(
        transcript: String,
        recording_health: Option<&markdown::RecordingHealth>,
        initial_status: Option<OutputStatus>,
    ) -> (String, Option<OutputStatus>, Option<String>) {
        let mut status = initial_status;
        let (transcript, forced) = match should_suppress_transcript(&transcript, recording_health) {
            Some(outcome) => {
                status = Some(OutputStatus::NoSpeech);
                (outcome.body, Some(outcome.diagnosis))
            }
            None => (transcript, None),
        };
        (transcript, status, forced)
    }

    #[test]
    fn process_path_suppresses_all_noise_with_sparse_stems() {
        // Acceptance criterion 4 (issue #241): the `minutes process <wav>`
        // path must show the "no audible content" message and a NoSpeech
        // status, not the raw hallucinated lines.
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n".to_string();
        let health = sparse_health(0.005, 0.001);
        let (body, status, forced) = apply_suppression_on_process_path(
            transcript,
            Some(&health),
            // Start from `Complete` to prove the gate downgrades the status
            // even when word_count cleared min_words.
            Some(OutputStatus::Complete),
        );
        assert_eq!(body, ALL_NOISE_SUPPRESSED_BODY);
        assert!(
            body.contains("No audible content"),
            "body should surface the diagnostic message, got: {}",
            body
        );
        // The raw hallucinated lines must NOT appear in the rendered body.
        assert!(
            !body.contains("(crying)"),
            "raw hallucination leaked: {}",
            body
        );
        assert!(
            !body.contains("[Growling]"),
            "raw hallucination leaked: {}",
            body
        );
        assert_eq!(status, Some(OutputStatus::NoSpeech));
        let diag = forced.expect("expected forced filter_diagnosis");
        assert!(diag.contains("all-noise"));
        assert!(diag.contains("body suppressed"));
    }

    #[test]
    fn process_path_leaves_real_content_alone() {
        // Real (if brief) speech must flow through both paths unchanged.
        let transcript = "[0:00] Hello world\n[0:05] Goodbye\n".to_string();
        let health = sparse_health(0.001, 0.001);
        let initial = Some(OutputStatus::Complete);
        let (body, status, forced) =
            apply_suppression_on_process_path(transcript.clone(), Some(&health), initial);
        assert_eq!(body, transcript, "real content was clobbered");
        assert_eq!(status, initial, "status was downgraded without cause");
        assert!(forced.is_none(), "forced diagnosis set without suppression");
    }

    #[test]
    fn process_path_holds_off_without_recording_health() {
        // No diarization / no health captured (e.g. config.diarization.engine
        // = "none") must NOT suppress, even on an all-noise transcript: we
        // lack the corroborating evidence to override.
        let transcript = "[0:07] (crying)\n[1:52] [Growling]\n".to_string();
        let initial = Some(OutputStatus::TranscriptOnly);
        let (body, status, forced) =
            apply_suppression_on_process_path(transcript.clone(), None, initial);
        assert_eq!(body, transcript);
        assert_eq!(status, initial);
        assert!(forced.is_none());
    }

    fn sample_summary() -> summarize::Summary {
        summarize::Summary {
            text: "Discussed Command RX codebase walkthrough and next steps.".into(),
            key_points: vec![
                "Walked through the Command RX codebase".into(),
                "Aligned on next implementation tasks".into(),
            ],
            decisions: vec!["Use the new ingestion pipeline".into()],
            action_items: vec!["@mat: Send follow-up notes by Friday".into()],
            open_questions: vec!["@samantha: Which rollout order should we use?".into()],
            commitments: vec!["@samantha: Share the access details".into()],
            participants: vec!["Mat".into(), "Samantha".into()],
        }
    }

    fn write_test_meeting(title: &str) -> (tempfile::TempDir, WriteResult, Frontmatter) {
        let dir = tempfile::TempDir::new().unwrap();
        let config = Config {
            output_dir: dir.path().to_path_buf(),
            ..Config::default()
        };

        let frontmatter = Frontmatter {
            title: title.into(),
            r#type: ContentType::Meeting,
            date: Local::now(),
            duration: "12m 0s".into(),
            source: None,
            status: Some(OutputStatus::Complete),
            tags: vec![],
            attendees: vec!["Samantha".into()],
            attendees_raw: None,
            calendar_event: None,
            people: vec![],
            entities: markdown::EntityLinks::default(),
            device: None,
            captured_at: None,
            context: None,
            action_items: vec![],
            decisions: vec![],
            intents: vec![],
            recorded_by: Some("Mat".into()),
            visibility: None,
            speaker_map: vec![],
            recording_health: None,
            processing_warnings: Vec::new(),
            template: None,
            filter_diagnosis: None,
        };

        let result = markdown::write_with_retry_path(
            &frontmatter,
            "Transcript body",
            Some("Summary body"),
            None,
            None,
            &config,
        )
        .unwrap();

        (dir, result, frontmatter)
    }

    #[test]
    fn generate_title_takes_first_words() {
        let transcript = "We need to discuss the new pricing strategy for Q2";
        let title = generate_title(transcript, None);
        assert_eq!(title, "The New Pricing Strategy for Q2");
    }

    #[test]
    fn generate_title_strips_timestamps_and_speaker_labels() {
        let transcript = "[SPEAKER_0 0:00] let's talk about API launch timeline for Q2";
        let title = generate_title(transcript, None);
        assert_eq!(title, "API Launch Timeline for Q2");
    }

    #[test]
    fn generate_title_strips_conversational_fillers_before_lead_in_phrase() {
        let transcript = "Okay, let's talk about API launch timeline for Q2";
        let title = generate_title(transcript, None);
        assert_eq!(title, "API Launch Timeline for Q2");
    }

    #[test]
    fn generate_title_prefers_context_when_available() {
        let transcript = "Okay so I just had an idea about onboarding";
        let title = generate_title(transcript, Some("Q2 pricing discussion with Alex"));
        assert_eq!(title, "Q2 Pricing Discussion with Alex");
    }

    #[test]
    fn generate_title_falls_back_when_only_timestamps_exist() {
        let transcript = "[0:00]";
        let title = generate_title(transcript, None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_rejects_greeting_only_openers() {
        let transcript = "[UNKNOWN 0:08] >> Hey, Matt.";
        let title = generate_title(transcript, None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_rejects_generic_meeting_openers() {
        let transcript = "Okay, this is a meeting that we're gonna be doing here";
        let title = generate_title(transcript, None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn llm_title_refinement_success_renames_written_meeting() {
        let (_dir, mut result, mut frontmatter) = write_test_meeting("Untitled Recording");
        let audio_path = Path::new("/tmp/input.wav");
        let summary = sample_summary();
        let decision = maybe_refine_title_with_llm(
            "Untitled Recording",
            None,
            Some("Command RX walkthrough with implementation planning."),
            Some(&summary),
            &markdown::EntityLinks::default(),
            &Config::default(),
            |_, _, _, _| {
                Ok(summarize::TitleRefinement {
                    title: "Command RX Codebase Walkthrough".into(),
                    model: "agent:codex".into(),
                    input_chars: 128,
                })
            },
        );

        apply_title_generation(
            audio_path,
            &mut result,
            &mut frontmatter,
            decision,
            |_, _| {},
        );

        assert_eq!(result.title, "Command RX Codebase Walkthrough");
        assert_eq!(frontmatter.title, "Command RX Codebase Walkthrough");
        assert!(result.path.exists());
        assert!(result
            .path
            .file_name()
            .and_then(|name| name.to_str())
            .unwrap_or_default()
            .contains("command-rx-codebase-walkthrough"));
        let content = std::fs::read_to_string(&result.path).unwrap();
        assert!(content.contains("title: \"Command RX Codebase Walkthrough\""));
    }

    #[test]
    fn llm_title_refinement_failure_falls_back_to_algorithmic_title() {
        let summary = sample_summary();
        let mut config = Config::default();
        config.summarization.engine = "agent".into();
        config.summarization.agent_command = "claude".into();
        let decision = maybe_refine_title_with_llm(
            "Roadmap Review",
            None,
            Some("Roadmap discussion"),
            Some(&summary),
            &markdown::EntityLinks::default(),
            &config,
            |_, _, _, _| Err("rate limited".into()),
        );

        assert_eq!(decision.final_title, "Roadmap Review");
        assert_eq!(decision.refined_title, None);
        assert_eq!(decision.outcome, "error");
        assert_eq!(decision.model, Some("agent:claude".into()));
    }

    #[test]
    fn llm_title_quality_filter_rejects_bad_titles() {
        let summary = sample_summary();
        let mut config = Config::default();
        config.summarization.engine = "agent".into();
        config.summarization.agent_command = "claude".into();
        let decision = maybe_refine_title_with_llm(
            "Roadmap Review",
            None,
            Some("Roadmap discussion"),
            Some(&summary),
            &markdown::EntityLinks::default(),
            &config,
            |_, _, _, _| {
                Ok(summarize::TitleRefinement {
                    title: "Meeting".into(),
                    model: "agent:codex".into(),
                    input_chars: 64,
                })
            },
        );

        assert_eq!(decision.final_title, "Roadmap Review");
        assert_eq!(decision.refined_title, None);
        assert_eq!(decision.outcome, "fallback");
    }

    #[test]
    fn algorithmic_fallback_still_works_standalone() {
        let title = generate_title("Hello.", None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn estimate_duration_formats_correctly() {
        // 32000 bytes/sec * 90 sec + 44 header = 2_880_044 bytes
        let dir = tempfile::TempDir::new().unwrap();
        let path = dir.path().join("test.wav");
        let data = vec![0u8; 2_880_044];
        std::fs::write(&path, &data).unwrap();

        let duration = estimate_duration(&path);
        assert_eq!(duration, "1m 30s");
    }

    #[test]
    fn format_duration_secs_rounds_to_nearest_second() {
        assert_eq!(format_duration_secs(4313.6), "71m 54s");
        assert_eq!(format_duration_secs(59.6), "1m 0s");
        assert_eq!(format_duration_secs(0.4), "0s");
    }

    #[test]
    fn parse_transcript_line_starts_reads_minutes_and_hours() {
        let transcript = "[0:05] Intro\n[12:34] Update\n[1:02:03] Long call\nnot timestamped";

        assert_eq!(
            parse_transcript_line_starts(transcript),
            vec![5.0, 754.0, 3723.0]
        );
    }

    #[test]
    fn build_transcript_windows_synthesizes_end_times() {
        let transcript = "[0:00] One\n[0:03] Two\n[0:20] Three\n";

        let windows = build_transcript_windows(transcript, 24.0);

        assert_eq!(
            windows,
            vec![
                diarize::TranscriptWindow {
                    start_secs: 0.0,
                    end_secs: 3.0,
                },
                diarize::TranscriptWindow {
                    start_secs: 3.0,
                    end_secs: 11.0,
                },
                diarize::TranscriptWindow {
                    start_secs: 20.0,
                    end_secs: 24.0,
                },
            ]
        );
    }

    #[test]
    fn extract_action_items_parses_assignee_and_task() {
        let summary = summarize::Summary {
            text: String::new(),
            key_points: vec![],
            decisions: vec![],
            action_items: vec![
                "@user: Send pricing doc by Friday".into(),
                "@sarah: Review competitor grid (due March 21)".into(),
                "Unassigned task with no @".into(),
            ],
            open_questions: vec![],
            commitments: vec![],
            participants: vec![],
        };

        let items = extract_action_items(&summary);
        assert_eq!(items.len(), 3);
        assert_eq!(items[0].assignee, "user");
        assert!(items[0].task.contains("Send pricing doc"));
        assert_eq!(items[0].due, Some("Friday".into()));
        assert_eq!(items[0].status, "open");

        assert_eq!(items[1].assignee, "sarah");
        assert_eq!(items[1].due, Some("March 21".into()));

        assert_eq!(items[2].assignee, "unassigned");
    }

    #[test]
    fn extract_decisions_with_topic_inference() {
        let summary = summarize::Summary {
            text: String::new(),
            key_points: vec![],
            decisions: vec![
                "Price advisor platform at monthly billing/mo".into(),
                "Use REST over GraphQL for the new API".into(),
            ],
            action_items: vec![],
            open_questions: vec![],
            commitments: vec![],
            participants: vec![],
        };

        let decisions = extract_decisions(&summary);
        assert_eq!(decisions.len(), 2);
        assert!(decisions[0].topic.is_some());
        assert!(decisions[0].text.contains("monthly billing"));
    }

    #[test]
    fn extract_due_date_patterns() {
        assert_eq!(
            extract_due_date("Send doc by Friday"),
            Some("Friday".into())
        );
        assert_eq!(
            extract_due_date("Review (due March 21)"),
            Some("March 21".into())
        );
        assert_eq!(extract_due_date("Just do this thing"), None);
    }

    #[test]
    fn single_stem_speaker_self_attribution_maps_to_identity() {
        let mut config = Config::default();
        config.identity.name = Some("Mat".into());

        let voice_result = VoiceMatchResult {
            attributions: vec![],
            self_profile_exists: true,
        };
        let labels = vec!["SPEAKER_0".to_string()];
        let l2_labels = std::collections::HashSet::new();

        let outcome = single_stem_speaker_self_attribution(
            Path::new("/fake.wav"),
            &config,
            &voice_result,
            true,
            "[SPEAKER_0 0:00] hello\n",
            &labels,
            &l2_labels,
        );
        let attr = outcome
            .attribution
            .expect("single stem speaker should map to self");

        assert_eq!(attr.name, "Mat");
        assert_eq!(attr.speaker_label, "SPEAKER_0");
        assert_eq!(attr.confidence, diarize::Confidence::Medium);
        assert_eq!(attr.source, diarize::AttributionSource::Deterministic);
        assert_eq!(
            outcome.debug.applied_via,
            Some(SelfAttributionAppliedVia::FallbackIdentityOnly)
        );
        assert_eq!(
            outcome.debug.fallback_reason,
            Some(SelfAttributionSkippedReason::NoStems)
        );
    }

    #[test]
    fn single_stem_speaker_self_attribution_respects_guards() {
        let mut config = Config::default();
        config.identity.name = Some("Mat".into());
        let voice_result = VoiceMatchResult {
            attributions: vec![],
            self_profile_exists: false,
        };
        let labels = vec!["SPEAKER_2".to_string()];
        let l2_labels = std::collections::HashSet::new();

        let no_stable_label = single_stem_speaker_self_attribution(
            Path::new("/fake.wav"),
            &config,
            &voice_result,
            true,
            "[SPEAKER_2 0:00] hello\n",
            &labels,
            &l2_labels,
        );
        assert!(!no_stable_label.debug.returned_some);
        assert_eq!(
            no_stable_label.debug.skipped_reason,
            Some(SelfAttributionSkippedReason::NoStableLabel)
        );

        let not_from_stems = single_stem_speaker_self_attribution(
            Path::new("/fake.wav"),
            &config,
            &voice_result,
            false,
            "[SPEAKER_0 0:00] hello\n",
            &["SPEAKER_0".to_string()],
            &std::collections::HashSet::new(),
        );
        assert!(!not_from_stems.debug.returned_some);
        assert_eq!(
            not_from_stems.debug.skipped_reason,
            Some(SelfAttributionSkippedReason::DiarizationNotFromStems)
        );
        let mut mapped = std::collections::HashSet::new();
        mapped.insert("SPEAKER_0".to_string());
        let already_mapped = single_stem_speaker_self_attribution(
            Path::new("/fake.wav"),
            &config,
            &voice_result,
            true,
            "[SPEAKER_0 0:00] hello\n",
            &["SPEAKER_0".to_string()],
            &mapped,
        );
        assert!(!already_mapped.debug.returned_some);
        assert_eq!(
            already_mapped.debug.skipped_reason,
            Some(SelfAttributionSkippedReason::AlreadyMapped)
        );
    }

    #[test]
    fn single_stem_speaker_self_attribution_handles_unknown_label() {
        let mut config = Config::default();
        config.identity.name = Some("Mat".into());
        let voice_result = VoiceMatchResult {
            attributions: vec![],
            self_profile_exists: true,
        };

        let outcome = single_stem_speaker_self_attribution(
            Path::new("/fake.wav"),
            &config,
            &voice_result,
            true,
            "[UNKNOWN 0:00] Hello there\n",
            &[],
            &std::collections::HashSet::new(),
        );
        let attr = outcome
            .attribution
            .expect("single unknown label should still map to self");

        assert_eq!(attr.speaker_label, "UNKNOWN");
        assert_eq!(attr.name, "Mat");
        assert_eq!(attr.confidence, diarize::Confidence::Medium);
        assert_eq!(
            outcome.debug.applied_via,
            Some(SelfAttributionAppliedVia::FallbackIdentityOnly)
        );
    }

    #[test]
    fn single_stem_self_attribution_skips_remote_only_label_without_voice_match() {
        let mut config = Config::default();
        config.identity.name = Some("Mat".into());
        let voice_result = VoiceMatchResult {
            attributions: vec![],
            self_profile_exists: true,
        };

        let outcome = single_stem_speaker_self_attribution(
            Path::new("/fake.wav"),
            &config,
            &voice_result,
            true,
            "[SPEAKER_1 0:00] remote voice\n",
            &["SPEAKER_1".to_string()],
            &std::collections::HashSet::new(),
        );

        assert!(outcome.attribution.is_none());
        assert_eq!(
            outcome.debug.skipped_reason,
            Some(SelfAttributionSkippedReason::RemoteOnlyLabel)
        );
    }

    #[test]
    fn infer_capture_backend_prefers_native_call_path() {
        assert_eq!(
            infer_capture_backend(
                Path::new("/Users/test/.minutes/native-captures/2026-04-08-083713-call.mov"),
                None
            ),
            "native-call"
        );
        assert_eq!(
            infer_capture_backend(Path::new("/Users/test/.minutes/jobs/job-123.wav"), None),
            "cpal"
        );
    }

    #[test]
    fn extract_effective_transcript_speaker_labels_keeps_unknowns() {
        let labels = extract_effective_transcript_speaker_labels(
            "[UNKNOWN 0:00] hello\n[SPEAKER_0 0:02] hi\n[Mat 0:05] done\n",
        );
        assert_eq!(labels, vec!["UNKNOWN", "SPEAKER_0", "Mat"]);
    }

    #[test]
    fn deterministic_two_person_mapping_stays_medium_confidence() {
        let mut config = Config::default();
        config.identity.name = Some("Mat".into());

        let result = attribute_meeting_speakers(
            Path::new("/fake.wav"),
            ContentType::Meeting,
            None,
            &config,
            &["Mat".into(), "Alex".into()],
            &["Mat".into(), "Alex".into()],
            2,
            true,
            false,
            &std::collections::HashMap::new(),
            "[SPEAKER_0 0:00] hello\n[SPEAKER_1 0:01] hi\n".into(),
        );

        assert_eq!(result.speaker_map.len(), 2);
        assert!(result
            .speaker_map
            .iter()
            .all(|entry| entry.confidence == diarize::Confidence::Medium));
    }

    #[test]
    fn degraded_ml_fallback_attribution_is_low_confidence_and_marked() {
        let mut config = Config::default();
        config.identity.name = Some("Mat".into());

        let result = attribute_meeting_speakers(
            Path::new("/fake.wav"),
            ContentType::Meeting,
            None,
            &config,
            &["Mat".into(), "Alex".into()],
            &["Mat".into(), "Alex".into()],
            2,
            false,
            true,
            &std::collections::HashMap::new(),
            "[SPEAKER_0 0:00] hello\n[SPEAKER_1 0:01] hi\n".into(),
        );

        assert_eq!(result.speaker_map.len(), 2);
        assert!(result.speaker_map.iter().all(|entry| {
            entry.confidence == diarize::Confidence::Low
                && entry.source == diarize::AttributionSource::MlBleedDegraded
        }));
    }

    #[test]
    fn degraded_ml_recording_health_sets_recovery_path() {
        let health = degraded_ml_recording_health(diarize::DegradedCapture {
            failure_kind: diarize::FailureKind::Silent,
            capture_backend: "cpal".into(),
            capture_source: diarize::CaptureSource::System,
            voice_active_ratio: Some(0.9),
            system_active_ratio: Some(0.0),
            observed_signal: diarize::ObservedSignal {
                frames_captured: 120,
                max_rms: 0.0,
                avg_rms: 0.0,
            },
            diagnostic_confidence: diarize::DiagnosticConfidence::Inferred,
        });

        assert_eq!(
            health.diarization_path,
            Some(markdown::DiarizationPath::MlBleedDegraded)
        );
        assert_eq!(health.capture_warnings.len(), 1);
        assert_eq!(
            health.capture_warnings[0].source,
            diarize::CaptureSource::System
        );
        assert!(health.capture_warnings[0]
            .message
            .contains("low confidence"));
    }

    #[test]
    fn merge_attendees_adds_summary_participants_case_insensitively() {
        let merged = merge_attendees(
            &["Mat".into(), "Alex".into()],
            &["alex".into(), "Casey".into()],
        );
        assert_eq!(merged, vec!["Mat", "Alex", "Casey"]);
    }

    #[test]
    fn merge_attendees_collapses_compound_speaker_labels_to_names() {
        let merged = merge_attendees(
            &["Andrea".into(), "Dan".into()],
            &[
                "Speaker 1 / Samantha".into(),
                "Speaker_2 (Mat)".into(),
                "Samantha".into(),
            ],
        );
        assert_eq!(merged, vec!["Andrea", "Dan", "Samantha", "Mat"]);
    }

    #[test]
    fn select_calendar_event_prefers_closest_candidate() {
        let selected = select_calendar_event(
            &[
                crate::calendar::CalendarEvent {
                    title: "Far Event".into(),
                    start: "2026-04-14 09:00".into(),
                    minutes_until: 45,
                    attendees: vec![],
                    url: None,
                },
                crate::calendar::CalendarEvent {
                    title: "Closest Event".into(),
                    start: "2026-04-14 10:00".into(),
                    minutes_until: 5,
                    attendees: vec![],
                    url: None,
                },
            ],
            None,
        )
        .expect("expected a match");

        assert_eq!(selected.title, "Closest Event");
    }

    #[test]
    fn select_calendar_event_requires_overlap_with_explicit_title() {
        let selected = select_calendar_event(
            &[crate::calendar::CalendarEvent {
                title: "Mat & Supernal Coding Meeting".into(),
                start: "2026-04-14 12:30".into(),
                minutes_until: 4,
                attendees: vec!["mat@example.com".into()],
                url: None,
            }],
            Some("Wesley prep session recovery"),
        );

        assert!(selected.is_none());
    }

    #[test]
    fn select_calendar_event_allows_explicit_title_when_names_overlap() {
        let selected = select_calendar_event(
            &[crate::calendar::CalendarEvent {
                title: "Wesley Young Prep Session".into(),
                start: "2026-04-14 12:00".into(),
                minutes_until: 2,
                attendees: vec!["wesley@example.com".into()],
                url: None,
            }],
            Some("Wesley prep session recovery"),
        )
        .expect("expected overlapping explicit title to keep match");

        assert_eq!(selected.title, "Wesley Young Prep Session");
    }

    #[test]
    fn native_call_without_trusted_attendees_maps_only_local_voice_source() {
        let mut config = Config::default();
        config.identity.name = Some("Mat".into());

        let result = attribute_meeting_speakers(
            Path::new("/Users/test/.minutes/native-captures/fake-call.mov"),
            ContentType::Meeting,
            Some("native-call"),
            &config,
            &[],
            &[],
            2,
            true,
            false,
            &std::collections::HashMap::new(),
            "[SPEAKER_1 0:00] hi\n[SPEAKER_0 0:01] hello\n".into(),
        );

        assert_eq!(result.speaker_map.len(), 1);
        assert!(result
            .speaker_map
            .iter()
            .any(|entry| entry.speaker_label == "SPEAKER_0"
                && entry.name == "Mat"
                && entry.confidence == diarize::Confidence::Medium));
        assert!(
            result
                .speaker_map
                .iter()
                .all(|entry| entry.speaker_label != "SPEAKER_1"),
            "native-call clips without trusted attendees should not invent a remote identity"
        );
    }

    #[test]
    fn extract_intents_builds_typed_entries() {
        let summary = summarize::Summary {
            text: String::new(),
            key_points: vec![],
            decisions: vec!["Use REST over GraphQL for the new API".into()],
            action_items: vec!["@user: Send pricing doc by Friday".into()],
            open_questions: vec!["@case: Do we grandfather current customers?".into()],
            commitments: vec!["@sarah: Share revised pricing model by Tuesday".into()],
            participants: vec![],
        };

        let intents = extract_intents(&summary);
        assert_eq!(intents.len(), 4);
        assert_eq!(intents[0].kind, markdown::IntentKind::ActionItem);
        assert_eq!(intents[0].who.as_deref(), Some("user"));
        assert_eq!(intents[0].by_date.as_deref(), Some("Friday"));
        assert_eq!(intents[1].kind, markdown::IntentKind::Decision);
        assert_eq!(intents[1].status, "decided");
        assert_eq!(intents[2].kind, markdown::IntentKind::OpenQuestion);
        assert_eq!(intents[2].who.as_deref(), Some("case"));
        assert_eq!(intents[3].kind, markdown::IntentKind::Commitment);
        assert_eq!(intents[3].who.as_deref(), Some("sarah"));
        assert_eq!(intents[3].by_date.as_deref(), Some("Tuesday"));
    }

    #[test]
    fn action_item_assignee_uses_name_for_high_confidence_speaker_map() {
        let items = normalize_action_items_with_speaker_map(
            vec![markdown::ActionItem {
                assignee: "Speaker_1 (Samantha)".into(),
                task: "Provide the quarterly file".into(),
                due: None,
                status: "open".into(),
            }],
            &[diarize::SpeakerAttribution {
                speaker_label: "SPEAKER_1".into(),
                name: "Samantha".into(),
                confidence: diarize::Confidence::High,
                source: diarize::AttributionSource::Enrollment,
            }],
        );

        assert_eq!(items[0].assignee, "Samantha");
    }

    #[test]
    fn action_item_and_intent_keep_speaker_hint_for_medium_confidence() {
        let speaker_map = vec![diarize::SpeakerAttribution {
            speaker_label: "SPEAKER_1".into(),
            name: "Samantha".into(),
            confidence: diarize::Confidence::Medium,
            source: diarize::AttributionSource::Llm,
        }];

        let items = normalize_action_items_with_speaker_map(
            vec![markdown::ActionItem {
                assignee: "Speaker_1 (Samantha)".into(),
                task: "Provide the quarterly file".into(),
                due: None,
                status: "open".into(),
            }],
            &speaker_map,
        );
        assert_eq!(items[0].assignee, "Samantha (SPEAKER_1)");

        let intents = normalize_intents_with_speaker_map(
            vec![markdown::Intent {
                kind: markdown::IntentKind::Commitment,
                what: "Provide the quarterly file".into(),
                who: Some("Speaker_1 (Samantha)".into()),
                status: "open".into(),
                by_date: None,
            }],
            &speaker_map,
        );
        assert_eq!(intents[0].who.as_deref(), Some("Samantha (SPEAKER_1)"));
    }

    #[test]
    fn generate_title_rejects_hallucinated_cjk() {
        // Whisper hallucinates CJK text on silence — title_from_transcript
        // rejects non-ASCII-dominant candidates, so generate_title falls back
        // to "Untitled Recording".
        let transcript = "スパイシー";
        let title = generate_title(transcript, None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_rejects_mixed_hallucination() {
        // Even with a timestamp prefix, the CJK content is rejected.
        let transcript = "[0:00] スパイシー\n[0:05] 東京タワー";
        let title = generate_title(transcript, None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_allows_latin_with_accents() {
        // Accented Latin characters (French, Spanish, etc.) should be fine.
        let transcript = "café résumé naïve";
        let title = generate_title(transcript, None);
        assert_ne!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_allows_polish_with_extended_latin() {
        // Polish city name: Łódź has mostly non-ASCII but all Latin-extended chars.
        let transcript = "Meeting in Łódź about the project";
        let title = generate_title(transcript, None);
        assert_ne!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_allows_purely_accented_latin() {
        // All non-ASCII but entirely Latin-script — must NOT be rejected.
        // Łódź: Ł(\u{0141}) ó(\u{00F3}) d(ASCII) ź(\u{017A}) — 3/4 extended, 1/4 ASCII
        let transcript = "Łódź Gdańsk Wrocław";
        let title = generate_title(transcript, None);
        assert_ne!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_rejects_cyrillic() {
        let transcript = "Привет мир";
        let title = generate_title(transcript, None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn generate_title_below_threshold_seam() {
        // 60% Latin (below 70% strip_foreign_script threshold) but first line is CJK.
        // title_from_transcript must catch it via Latin-ratio check.
        let transcript = "[0:00] スパイシー\n[0:05] Hello world\n[0:10] Good morning\n[0:15] 東京\n[0:20] Testing";
        let title = generate_title(transcript, None);
        assert_eq!(title, "Untitled Recording");
    }

    #[test]
    fn build_entity_links_derives_people_and_projects() {
        let action_items = vec![markdown::ActionItem {
            assignee: "mat".into(),
            task: "Send pricing doc".into(),
            due: Some("Friday".into()),
            status: "open".into(),
        }];
        let decisions = vec![markdown::Decision {
            text: "Launch pricing at monthly billing per month".into(),
            topic: Some("pricing strategy".into()),
            authority: None,
            supersedes: None,
        }];
        let intents = vec![markdown::Intent {
            kind: markdown::IntentKind::Commitment,
            what: "Share revised pricing model".into(),
            who: Some("Alex Chen".into()),
            status: "open".into(),
            by_date: Some("Tuesday".into()),
        }];

        let entities = build_entity_links(
            "Q2 Pricing Discussion",
            Some("pricing review with Alex"),
            &["Case Wintermute".into()],
            &action_items,
            &decisions,
            &intents,
            &["advisor-platform".into()],
            None,
        );

        assert!(entities.people.iter().any(|entity| entity.slug == "mat"));
        assert!(entities
            .people
            .iter()
            .any(|entity| entity.slug == "alex-chen"));
        assert!(entities
            .people
            .iter()
            .any(|entity| entity.slug == "case-wintermute"));
        assert!(entities
            .projects
            .iter()
            .any(|entity| entity.slug == "pricing-strategy"));
        assert!(entities
            .projects
            .iter()
            .any(|entity| entity.slug == "advisor-platform"));
    }

    #[test]
    fn build_entity_links_rejects_task_like_or_speaker_labeled_projects() {
        let entities = build_entity_links(
            "CCRx Data Access",
            Some("Vantus Cardinal portal"),
            &["Samantha".into()],
            &[],
            &[
                markdown::Decision {
                    text: "Speaker_1 provide speaker roster and contact notes".into(),
                    topic: Some("speaker 1 provide speaker".into()),
                    authority: None,
                    supersedes: None,
                },
                markdown::Decision {
                    text: "Reach out to Cardinal about access".into(),
                    topic: Some("reach out".into()),
                    authority: None,
                    supersedes: None,
                },
                markdown::Decision {
                    text: "Pioneer asked build the custom report after review".into(),
                    topic: Some("pioneer asked build".into()),
                    authority: None,
                    supersedes: None,
                },
                markdown::Decision {
                    text: "LeaderNet 835 reconciliation remains the core workflow".into(),
                    topic: Some("leadernet 835 reconciliation".into()),
                    authority: None,
                    supersedes: None,
                },
            ],
            &[],
            &[],
            None,
        );

        let project_slugs: Vec<&str> = entities
            .projects
            .iter()
            .map(|entity| entity.slug.as_str())
            .collect();
        assert!(project_slugs.contains(&"leadernet-835-reconciliation"));
        assert!(!project_slugs.contains(&"speaker-1-provide-speaker"));
        assert!(!project_slugs.contains(&"reach-out"));
        assert!(!project_slugs.contains(&"pioneer-asked-build"));
    }

    #[test]
    fn build_entity_links_folds_email_and_slash_forms_onto_canonical_person() {
        let entities = build_entity_links(
            "Alex <> Casey",
            None,
            &[
                "alex@example.org".into(),
                "casey@example.com".into(),
                "Casey".into(),
                "Alex / Alexander".into(),
                "Dan".into(),
            ],
            &[],
            &[],
            &[],
            &[],
            None,
        );

        let slugs: Vec<&str> = entities.people.iter().map(|e| e.slug.as_str()).collect();
        assert!(slugs.contains(&"alex"), "email localpart kept: {:?}", slugs);
        assert!(slugs.contains(&"casey"), "casey present: {:?}", slugs);
        assert!(slugs.contains(&"dan"), "dan present: {:?}", slugs);
        // The email form and the bare name collapsed for Casey.
        assert_eq!(
            slugs.iter().filter(|s| **s == "casey").count(),
            1,
            "casey deduped: {:?}",
            slugs
        );
        // The slash-disambiguated form does not spawn its own slug.
        assert!(
            !slugs.contains(&"alex-alexander"),
            "slash-disambiguation stripped: {:?}",
            slugs
        );
        // The email form does not spawn a slug that includes the domain.
        assert!(
            !slugs.contains(&"alex-example-org"),
            "email domain stripped: {:?}",
            slugs
        );
        assert!(
            !slugs.contains(&"casey-example-com"),
            "email domain stripped for casey: {:?}",
            slugs
        );

        let casey = entities.people.iter().find(|e| e.slug == "casey").unwrap();
        assert!(
            casey.aliases.iter().any(|a| a == "casey@example.com"),
            "original email preserved as alias: {:?}",
            casey.aliases
        );

        let alex = entities.people.iter().find(|e| e.slug == "alex").unwrap();
        assert!(
            alex.aliases.iter().any(|a| a == "alex / alexander"),
            "original slash form preserved as alias: {:?}",
            alex.aliases
        );
    }

    #[test]
    fn build_entity_links_folds_user_identity_aliases_and_emails() {
        let identity = IdentityConfig {
            name: Some("Mat".into()),
            email: None,
            emails: vec![
                "mathieu@followthedata.co".into(),
                "matsilverstein@gmail.com".into(),
            ],
            aliases: vec!["Mathieu".into(), "Matthew".into()],
        };

        let entities = build_entity_links(
            "Weekly sync",
            None,
            &[
                "mathieu@followthedata.co".into(),
                "matsilverstein@gmail.com".into(),
                "Mat".into(),
                "Mathieu".into(),
                "Dan".into(),
                "Andrea".into(),
            ],
            &[],
            &[],
            &[],
            &[],
            Some(&identity),
        );

        let slugs: Vec<&str> = entities.people.iter().map(|e| e.slug.as_str()).collect();
        // Canonical Mat is present; all alias forms folded in.
        assert!(slugs.contains(&"mat"), "canonical mat present: {:?}", slugs);
        assert!(!slugs.contains(&"mathieu"), "mathieu folded: {:?}", slugs);
        assert!(
            !slugs.contains(&"matsilverstein"),
            "matsilverstein folded: {:?}",
            slugs
        );
        assert!(!slugs.contains(&"matthew"), "matthew folded: {:?}", slugs);
        // Non-user entities untouched.
        assert!(slugs.contains(&"dan"), "dan present: {:?}", slugs);
        assert!(slugs.contains(&"andrea"), "andrea present: {:?}", slugs);

        let mat = entities.people.iter().find(|e| e.slug == "mat").unwrap();
        assert!(
            mat.aliases.iter().any(|a| a == "mathieu"),
            "Mathieu folded as alias: {:?}",
            mat.aliases
        );
        assert!(
            mat.aliases.iter().any(|a| a == "mathieu@followthedata.co"),
            "work email folded as alias: {:?}",
            mat.aliases
        );
        assert!(
            mat.aliases.iter().any(|a| a == "matsilverstein@gmail.com"),
            "personal email folded as alias: {:?}",
            mat.aliases
        );
    }

    #[test]
    fn fold_user_identity_skips_meeting_without_user() {
        // If the user isn't a participant, don't invent an entity.
        let identity = IdentityConfig {
            name: Some("Mat".into()),
            email: Some("mathieu@followthedata.co".into()),
            emails: vec![],
            aliases: vec!["Mathieu".into()],
        };

        let entities = build_entity_links(
            "Third-party call",
            None,
            &["Dan".into(), "Andrea".into()],
            &[],
            &[],
            &[],
            &[],
            Some(&identity),
        );

        let slugs: Vec<&str> = entities.people.iter().map(|e| e.slug.as_str()).collect();
        assert!(!slugs.contains(&"mat"), "mat not invented: {:?}", slugs);
        assert_eq!(slugs.len(), 2);
    }

    #[test]
    fn identity_config_all_user_aliases_dedupes_and_preserves_order() {
        let identity = IdentityConfig {
            name: Some("Mat".into()),
            email: Some("mathieu@followthedata.co".into()),
            emails: vec![
                "mathieu@followthedata.co".into(), // dup of legacy email
                "matsilverstein@gmail.com".into(),
                "   ".into(), // blank
            ],
            aliases: vec!["Mathieu".into(), "mathieu".into()],
        };

        let aliases = identity.all_user_aliases();
        assert_eq!(
            aliases,
            vec![
                "mathieu@followthedata.co".to_string(),
                "matsilverstein@gmail.com".to_string(),
                "Mathieu".to_string(),
            ],
            "legacy email first, dedup case-insensitively, skip blanks"
        );
    }

    #[test]
    fn strip_name_disambiguation_handles_common_shapes() {
        assert_eq!(strip_name_disambiguation("Mat / Matthew"), "Mat");
        assert_eq!(strip_name_disambiguation("Mat"), "Mat");
        // No surrounding spaces around "/" means it's not a disambiguation hedge.
        assert_eq!(strip_name_disambiguation("A/B Testing"), "A/B Testing");
    }

    #[test]
    fn strip_email_domain_returns_localpart_only_for_valid_emails() {
        assert_eq!(strip_email_domain("alex@example.org"), "alex");
        assert_eq!(strip_email_domain("casey@example.com"), "casey");
        // Missing dot in domain → not treated as email.
        assert_eq!(strip_email_domain("user@localhost"), "user@localhost");
        // Missing local part → unchanged.
        assert_eq!(strip_email_domain("@bad.tld"), "@bad.tld");
        // No '@' at all.
        assert_eq!(strip_email_domain("Alex"), "Alex");
    }

    #[test]
    fn merge_attendees_strips_name_disambiguation_hedge() {
        let merged = merge_attendees(
            &["Andrea".into()],
            &["Alex / Alexander".into(), "Casey".into()],
        );
        assert!(
            merged.iter().any(|a| a == "Alex"),
            "slash suffix stripped in attendees: {:?}",
            merged
        );
        assert!(
            !merged.iter().any(|a| a == "Alex / Alexander"),
            "slash-hedge form not kept: {:?}",
            merged
        );
    }

    #[test]
    fn build_decode_hints_uses_identity_aliases_attendees_and_context() {
        let identity = IdentityConfig {
            name: Some("Mat".into()),
            email: Some("mat@example.com".into()),
            emails: vec!["mathieu@work.com".into()],
            aliases: vec!["Mathieu".into(), "Matthew".into()],
        };

        let hints = build_decode_hints(
            Some("X1 / Planning Review"),
            Some("Mat with Alex Chen"),
            Some("Asana migration with Box"),
            &[
                "mat@example.com".into(),
                "alex.chen@example.com".into(),
                "Casey / Casey Winters".into(),
            ],
            Some(&identity),
            None,
        );

        assert_eq!(
            hints.whisper_initial_prompt().as_deref(),
            Some(
                "Names and terms that may appear in this audio: Mat, Mathieu, Matthew, Alex Chen, Casey, X1, Planning Review, Asana migration. Preserve spelling exactly when heard."
            )
        );
    }

    #[test]
    fn build_decode_hints_skips_identity_when_user_not_in_attendees() {
        let identity = IdentityConfig {
            name: Some("Mat".into()),
            email: Some("mat@example.com".into()),
            emails: vec!["mathieu@work.com".into()],
            aliases: vec!["Mathieu".into(), "Matthew".into()],
        };

        let hints = build_decode_hints(
            Some("X1 / Planning Review"),
            Some("Alex Chen with Casey Winters"),
            Some("Asana migration with Box"),
            &[
                "alex.chen@example.com".into(),
                "Casey / Casey Winters".into(),
            ],
            Some(&identity),
            None,
        );

        let prompt = hints.whisper_initial_prompt().expect("prompt");
        assert!(!prompt.contains("Mathieu"));
        assert!(!prompt.contains("Matthew"));
        assert!(!prompt.contains("Mat,"));
        assert!(prompt.contains("Alex Chen"));
        assert!(prompt.contains("Casey"));
    }

    #[test]
    fn build_decode_hints_includes_bounded_vocabulary_terms() {
        let vocabulary = crate::vocabulary::VocabularyStore {
            entries: vec![
                crate::vocabulary::VocabularyEntry {
                    kind: crate::vocabulary::VocabularyKind::Organization,
                    canonical: "Automattic".into(),
                    aliases: vec!["Automatic".into()],
                    priority: crate::vocabulary::VocabularyPriority::High,
                    ..crate::vocabulary::VocabularyEntry::default()
                },
                crate::vocabulary::VocabularyEntry {
                    kind: crate::vocabulary::VocabularyKind::Project,
                    canonical: "Harper".into(),
                    priority: crate::vocabulary::VocabularyPriority::Normal,
                    ..crate::vocabulary::VocabularyEntry::default()
                },
            ],
        }
        .normalized()
        .unwrap();

        let hints = build_decode_hints(
            Some("Writing tools"),
            None,
            None,
            &["Elijah Potter".into()],
            None,
            Some(&vocabulary),
        );

        let prompt = hints.whisper_initial_prompt().expect("prompt");
        assert!(prompt.contains("Elijah Potter"));
        assert!(prompt.contains("Automattic"));
        assert!(prompt.contains("Automatic"));
        assert!(prompt.contains("Harper"));
    }

    #[test]
    fn normalize_self_name_refs_in_transcript_rewrites_intro_patterns_only() {
        let transcript = "[SPEAKER_1 0:00] Hey, this is Matt testing one more time.\n[SPEAKER_1 0:04] Matt is testing the path repro.\n[SPEAKER_2 0:08] Another speaker said Matt Mullenweg messaged me.\n";
        let normalized =
            normalize_self_name_refs_in_transcript(transcript, "Mat", &["Matt".into()]);

        assert!(normalized.contains("Hey, this is Mat testing one more time."));
        assert!(normalized.contains("Mat is testing the path repro."));
        assert!(normalized.contains("Matt Mullenweg messaged me."));
        assert!(!normalized.contains("Hey, this is Matt testing one more time."));
    }

    #[test]
    fn normalize_self_name_refs_in_transcript_uses_fuzzy_intro_match_without_explicit_variant() {
        let transcript = "[SPEAKER_1 0:00] This is Matt and I'm testing.\n";
        let normalized = normalize_self_name_refs_in_transcript(transcript, "Mat", &[]);

        assert!(
            normalized.contains("This is Mat and I'm testing."),
            "{}",
            normalized
        );
    }

    #[test]
    fn collect_user_participant_variants_uses_attendee_forms_matching_identity() {
        let identity = IdentityConfig {
            name: Some("Mat".into()),
            email: Some("mat@example.com".into()),
            emails: vec![],
            aliases: vec!["Mathieu".into()],
        };

        let variants =
            collect_user_participant_variants(&["Matt".into(), "Alex Chen".into()], &identity);

        // "Matt" no longer needs to be treated as an explicit participant
        // variant here because the guarded intro matcher handles close
        // self-name fuzz like "This is Matt" at rewrite time.
        assert_eq!(variants, vec!["Mathieu".to_string()]);
    }

    #[test]
    fn write_transcript_artifact_normalizes_self_name_for_title_and_body() {
        let dir = tempfile::TempDir::new().unwrap();
        let audio_path = dir.path().join("memo.wav");
        std::fs::write(&audio_path, vec![0u8; 64_044]).unwrap();

        let config = Config {
            output_dir: dir.path().to_path_buf(),
            identity: IdentityConfig {
                name: Some("Mat".into()),
                aliases: vec!["Matt".into()],
                ..IdentityConfig::default()
            },
            ..Config::default()
        };

        let context = BackgroundPipelineContext {
            calendar_event: Some(crate::calendar::CalendarEvent {
                title: "meeting".into(),
                start: Local::now().to_rfc3339(),
                minutes_until: 0,
                attendees: vec!["Matt".into(), "Alex Chen".into()],
                url: None,
            }),
            ..BackgroundPipelineContext::default()
        };

        let artifact = write_transcript_artifact(
            &audio_path,
            ContentType::Meeting,
            None,
            &config,
            &context,
            None,
            "[SPEAKER_1 0:00] Matt is outlining onboarding follow up.\n".into(),
            crate::transcribe::FilterStats::default(),
            0,
        )
        .unwrap();

        assert!(
            artifact
                .transcript
                .contains("Mat is outlining onboarding follow up."),
            "{}",
            artifact.transcript
        );
        assert!(!artifact.transcript.contains("Matt is outlining"));
        assert_eq!(
            artifact.frontmatter.title,
            "Mat Is Outlining Onboarding Follow Up"
        );
    }

    #[test]
    fn is_task_like_project_candidate_requires_more_than_a_verb_like_start() {
        assert!(!is_task_like_project_candidate(
            "review board",
            Some("Review Board"),
        ));
        assert!(!is_task_like_project_candidate(
            "run club",
            Some("Run Club")
        ));
        assert!(!is_task_like_project_candidate(
            "study group",
            Some("Study Group"),
        ));
        assert!(is_task_like_project_candidate(
            "review q3 budget",
            Some("Review the Q3 budget"),
        ));
        assert!(is_task_like_project_candidate(
            "run tests",
            Some("Run the tests"),
        ));
        assert!(is_task_like_project_candidate(
            "speaker 1 provide quarterly report",
            Some("Speaker 1 provide quarterly report"),
        ));
        assert!(!is_task_like_project_candidate(
            "asana migration",
            Some("Asana migration"),
        ));
    }

    #[test]
    fn synthetic_frontmatter_cleanup_keeps_names_and_drops_bad_projects() {
        let attendees = normalize_attendees_with_speaker_map(
            &merge_attendees(
                &["Andrea".into(), "Dan".into()],
                &["Speaker 1 / Samantha".into(), "Speaker_2 (Mat)".into()],
            ),
            &[diarize::SpeakerAttribution {
                speaker_label: "SPEAKER_1".into(),
                name: "Samantha".into(),
                confidence: diarize::Confidence::Medium,
                source: diarize::AttributionSource::Llm,
            }],
        );
        let action_items = normalize_action_items_with_speaker_map(
            vec![markdown::ActionItem {
                assignee: "Speaker_1 (Samantha)".into(),
                task: "Provide the quarterly LeaderNet file".into(),
                due: None,
                status: "open".into(),
            }],
            &[diarize::SpeakerAttribution {
                speaker_label: "SPEAKER_1".into(),
                name: "Samantha".into(),
                confidence: diarize::Confidence::Medium,
                source: diarize::AttributionSource::Llm,
            }],
        );
        let intents = normalize_intents_with_speaker_map(
            vec![markdown::Intent {
                kind: markdown::IntentKind::Commitment,
                what: "Provide the quarterly LeaderNet file".into(),
                who: Some("Speaker_1 (Samantha)".into()),
                status: "open".into(),
                by_date: None,
            }],
            &[diarize::SpeakerAttribution {
                speaker_label: "SPEAKER_1".into(),
                name: "Samantha".into(),
                confidence: diarize::Confidence::Medium,
                source: diarize::AttributionSource::Llm,
            }],
        );
        let entities = build_entity_links(
            "CCRx Data Access",
            Some("LeaderNet 835 reconciliation"),
            &attendees,
            &action_items,
            &[markdown::Decision {
                text: "Speaker_1 provide speaker roster and contact notes".into(),
                topic: Some("speaker 1 provide speaker".into()),
                authority: None,
                supersedes: None,
            }],
            &intents,
            &[],
            None,
        );

        let frontmatter = markdown::Frontmatter {
            title: "CCRx Data Access".into(),
            r#type: ContentType::Meeting,
            date: Local::now(),
            duration: "21m".into(),
            source: None,
            status: Some(OutputStatus::Complete),
            tags: vec![],
            attendees,
            attendees_raw: None,
            calendar_event: None,
            people: entities
                .people
                .iter()
                .map(|entity| entity.label.clone())
                .collect(),
            entities,
            device: None,
            captured_at: None,
            context: None,
            action_items,
            decisions: vec![],
            intents,
            recorded_by: Some("Mat".into()),
            visibility: None,
            speaker_map: vec![diarize::SpeakerAttribution {
                speaker_label: "SPEAKER_1".into(),
                name: "Samantha".into(),
                confidence: diarize::Confidence::Medium,
                source: diarize::AttributionSource::Llm,
            }],
            recording_health: None,
            processing_warnings: Vec::new(),
            template: None,
            filter_diagnosis: None,
        };

        assert_eq!(
            frontmatter.attendees,
            vec!["Andrea", "Dan", "Samantha", "Mat"]
        );
        assert_eq!(frontmatter.action_items[0].assignee, "Samantha (SPEAKER_1)");
        assert_eq!(
            frontmatter.intents[0].who.as_deref(),
            Some("Samantha (SPEAKER_1)")
        );
        assert!(frontmatter
            .entities
            .projects
            .iter()
            .all(|entity| entity.slug != "speaker-1-provide-speaker"));
    }

    #[test]
    fn derive_structured_tags_for_memo_includes_source_people_projects_and_guardrails() {
        let entities = build_entity_links(
            "Pricing Idea",
            Some("pricing review with Alex"),
            &["Alex Chen".into()],
            &[],
            &[markdown::Decision {
                text: "Use annual billing for premium users".into(),
                topic: Some("pricing strategy".into()),
                authority: None,
                supersedes: None,
            }],
            &[markdown::Intent {
                kind: markdown::IntentKind::Commitment,
                what: "Send the revised deck".into(),
                who: Some("Alex Chen".into()),
                status: "open".into(),
                by_date: Some("Friday".into()),
            }],
            &[],
            None,
        );

        let tags = derive_structured_tags(
            ContentType::Memo,
            Some("voice-memos"),
            Some("iPhone 16 Pro"),
            &entities,
            &[markdown::Decision {
                text: "Use annual billing for premium users".into(),
                topic: Some("pricing strategy".into()),
                authority: None,
                supersedes: None,
            }],
            &[markdown::Intent {
                kind: markdown::IntentKind::Commitment,
                what: "Send the revised deck".into(),
                who: Some("Alex Chen".into()),
                status: "open".into(),
                by_date: Some("Friday".into()),
            }],
        );

        assert!(tags.iter().any(|tag| tag == "memo"));
        assert!(tags.iter().any(|tag| tag == "source:voice-memos"));
        assert!(tags.iter().any(|tag| tag == "device:iphone-16-pro"));
        assert!(tags.iter().any(|tag| tag == "person:alex-chen"));
        assert!(tags.iter().any(|tag| tag == "project:pricing-idea"));
        assert!(tags.iter().any(|tag| tag == "topic:pricing-strategy"));
        assert!(tags.iter().any(|tag| tag == "has-actions"));
        assert!(tags.iter().any(|tag| tag == "has-decisions"));
        assert!(tags.len() <= 8);
    }

    #[test]
    #[cfg(unix)]
    fn run_post_record_hook_executes_and_receives_path() {
        let dir = tempfile::TempDir::new().unwrap();
        let marker = dir.path().join("hook-ran.txt");
        let transcript = dir.path().join("test-meeting.md");
        std::fs::write(&transcript, "test content").unwrap();

        // The hook is invoked as: sh -c '{cmd} "$1"' -- /path/to/transcript.md
        // So the user's command receives the transcript path as $1.
        // Use a simple script that copies $1 to the marker location.
        let script = dir.path().join("hook.sh");
        std::fs::write(
            &script,
            format!("#!/bin/sh\ncp \"$1\" '{}'\n", marker.display()),
        )
        .unwrap();
        #[cfg(unix)]
        {
            use std::os::unix::fs::PermissionsExt;
            std::fs::set_permissions(&script, std::fs::Permissions::from_mode(0o755)).unwrap();
        }

        let config = Config {
            hooks: crate::config::HooksConfig {
                post_record: Some(script.display().to_string()),
            },
            ..Config::default()
        };

        // Replicate the exact invocation from run_post_record_hook
        let cmd = config.hooks.post_record.as_ref().unwrap();
        let output = std::process::Command::new("sh")
            .arg("-c")
            .arg(format!("{} \"$1\"", cmd))
            .arg("--")
            .arg(transcript.display().to_string())
            .output()
            .unwrap();
        let stderr = String::from_utf8_lossy(&output.stderr);
        assert!(output.status.success(), "hook failed (stderr={})", stderr);
        assert!(marker.exists(), "hook should have created the marker file");
        let contents = std::fs::read_to_string(&marker).unwrap();
        assert_eq!(contents, "test content");
    }

    #[test]
    #[ignore = "requires MINUTES_PROPER_NAME_EVAL_CORPUS pointing at a local corpus manifest"]
    fn proper_name_eval_corpus() {
        let corpus_path = match std::env::var("MINUTES_PROPER_NAME_EVAL_CORPUS") {
            Ok(path) => std::path::PathBuf::from(path),
            Err(_) => {
                eprintln!(
                    "proper-name-eval skipped: set MINUTES_PROPER_NAME_EVAL_CORPUS=/abs/path/to/corpus.json"
                );
                return;
            }
        };

        let report = crate::autoresearch::run_decode_hint_eval_corpus(
            &corpus_path,
            &crate::autoresearch::DecodeHintEvalOptions::default(),
        )
        .unwrap_or_else(|error| panic!("proper-name eval failed: {}", error));

        println!(
            "{}",
            serde_json::to_string_pretty(&report).expect("serialize eval results")
        );
        if !report.failure_messages.is_empty() {
            panic!(
                "proper-name eval failures:\n{}",
                report.failure_messages.join("\n")
            );
        }
    }
}

/// Tests for `prepare_transcription_input`: the helper that decides whether
/// the input `.mov` needs stem-mixing before transcription (#234 fix, #235 v2
/// review items #3 stem-lookup correctness, #4 typed error, #6 shared between
/// `process_with_progress_and_sidecar` and `transcribe_to_artifact`).
#[cfg(test)]
mod prepare_transcription_input_tests {
    use super::*;
    use std::fs;

    /// Write a 1-second audible-tone WAV at 16kHz mono s16. We need a non-
    /// silent signal because `stem_has_audio` (via `discover_stem_plan`)
    /// probes RMS and rejects anything below 0.001, which pure silence
    /// fails. A 440 Hz sine at amplitude 5000 (s16) gives an RMS of
    /// ~0.108 normalized, well above the floor.
    fn write_audible_wav(path: &std::path::Path) {
        let spec = hound::WavSpec {
            channels: 1,
            sample_rate: 16_000,
            bits_per_sample: 16,
            sample_format: hound::SampleFormat::Int,
        };
        let mut writer = hound::WavWriter::create(path, spec).unwrap();
        let two_pi_over_period = 2.0 * std::f32::consts::PI * 440.0 / 16_000.0;
        for n in 0..16_000 {
            let sample = (5000.0 * (n as f32 * two_pi_over_period).sin()) as i16;
            writer.write_sample(sample).unwrap();
        }
        writer.finalize().unwrap();
    }

    /// Build the `<name>.mov` + `<name>.voice.wav` + `<name>.system.wav`
    /// trio that a native-call capture produces. The `.mov` itself is a
    /// 1-byte stub because `prepare_transcription_input` sniffs only the
    /// extension and the sibling stems, never the `.mov` content.
    fn fake_native_call_capture(name: &str) -> (tempfile::TempDir, std::path::PathBuf) {
        let dir = tempfile::TempDir::new().unwrap();
        let mov = dir.path().join(format!("{}.mov", name));
        let voice = dir.path().join(format!("{}.voice.wav", name));
        let system = dir.path().join(format!("{}.system.wav", name));
        fs::write(&mov, b"x").unwrap();
        write_audible_wav(&voice);
        write_audible_wav(&system);
        (dir, mov)
    }

    fn ffmpeg_available() -> bool {
        std::process::Command::new("ffmpeg")
            .arg("-version")
            .stdout(std::process::Stdio::null())
            .stderr(std::process::Stdio::null())
            .status()
            .map(|s| s.success())
            .unwrap_or(false)
    }

    #[test]
    fn returns_ok_none_for_non_mov_input() {
        let dir = tempfile::TempDir::new().unwrap();
        let wav = dir.path().join("voice-memo.wav");
        write_audible_wav(&wav);
        let result = prepare_transcription_input(&wav).expect("non-.mov should not error");
        assert!(
            result.is_none(),
            ".wav input must return Ok(None) so the caller uses it as-is"
        );
    }

    #[test]
    fn returns_ok_none_for_mov_with_no_stems() {
        // Plain `.mov` with no sibling stems: could be a screen recording,
        // downloaded file, or a native-call capture whose stems were
        // cleaned up. We cannot distinguish, so we let it through to the
        // existing decoder rather than hard-erroring on every stemless
        // `.mov` (which would break legitimate non-native-call use cases).
        let dir = tempfile::TempDir::new().unwrap();
        let mov = dir.path().join("screen-recording.mov");
        fs::write(&mov, b"x").unwrap();
        let result = prepare_transcription_input(&mov).expect("stemless .mov should not error");
        assert!(
            result.is_none(),
            "stemless .mov must return Ok(None); hard-erroring would break non-native-call .mov use"
        );
    }

    #[test]
    fn mixes_stems_when_both_present_and_valid() {
        if !ffmpeg_available() {
            eprintln!("skipping: ffmpeg not on PATH");
            return;
        }
        let (_dir, mov) = fake_native_call_capture("call-clean");
        let result = prepare_transcription_input(&mov)
            .expect("mix must succeed when both stems are valid PCM");
        let handle = result.expect("must return Some on the happy path");
        let mixed_path = handle.as_path().to_path_buf();
        assert!(mixed_path.exists(), "mixed PCM file must exist on disk");

        // Verify the file is a valid WAV (RIFF header + WAVE format tag).
        let header = fs::read(&mixed_path).unwrap();
        assert!(
            header.len() >= 12,
            "wav header is too short: {} bytes",
            header.len()
        );
        assert_eq!(&header[0..4], b"RIFF", "wav must start with RIFF magic");
        assert_eq!(&header[8..12], b"WAVE", "wav must declare WAVE format");

        // Drop must clean up the temp file.
        drop(handle);
        assert!(
            !mixed_path.exists(),
            "MixedStemTempFile Drop impl must remove the temp file"
        );
    }

    #[test]
    fn errors_when_voice_stem_missing() {
        let dir = tempfile::TempDir::new().unwrap();
        let mov = dir.path().join("partial-voice.mov");
        let system = dir.path().join("partial-voice.system.wav");
        fs::write(&mov, b"x").unwrap();
        write_audible_wav(&system);
        // voice.wav deliberately not created — simulates a partial-crash
        // where the system side survived but the mic side did not.

        let result = prepare_transcription_input(&mov);
        match result {
            Err(MinutesError::Transcribe(
                crate::error::TranscribeError::NativeCaptureStemMixUnavailable { reason },
            )) => {
                assert!(
                    reason.to_lowercase().contains("voice stem"),
                    "error reason must mention the missing voice stem; got: {}",
                    reason
                );
            }
            other => panic!(
                "expected NativeCaptureStemMixUnavailable, got: {:?}",
                other.map(|opt| opt.is_some())
            ),
        }
    }

    #[test]
    fn errors_when_voice_present_and_system_stem_file_absent() {
        // Codex review of PR #235 v2 caught this: `discover_stem_plan`
        // returns None for both the "no stems at all" case AND the
        // "voice ok, system absent from disk" case. The second case is
        // a partial-crash native capture where the system stem was lost
        // during recording, and falling through to the broken `.mov`
        // decoder reproduces the exact 2x bug this helper prevents.
        //
        // The fix distinguishes the two None cases by independently
        // checking for a usable sibling voice stem in
        // `prepare_transcription_input`. This test pins that contract.
        let dir = tempfile::TempDir::new().unwrap();
        let mov = dir.path().join("partial-system-missing.mov");
        let voice = dir.path().join("partial-system-missing.voice.wav");
        fs::write(&mov, b"x").unwrap();
        write_audible_wav(&voice);
        // system.wav deliberately not created (not even zero-byte; the
        // file doesn't exist on disk at all). This is the case that
        // returned None from discover_stem_plan and would have silently
        // fallen through to the broken `.mov` decode without this fix.

        let result = prepare_transcription_input(&mov);
        match result {
            Err(MinutesError::Transcribe(
                crate::error::TranscribeError::NativeCaptureStemMixUnavailable { reason },
            )) => {
                assert!(
                    reason.to_lowercase().contains("system stem")
                        && reason.to_lowercase().contains("missing"),
                    "error reason must call out the missing system stem; got: {}",
                    reason
                );
            }
            other => panic!(
                "expected NativeCaptureStemMixUnavailable, got: {:?}",
                other.map(|opt| opt.is_some())
            ),
        }
    }

    #[test]
    fn errors_when_system_stem_is_zero_byte_partial_crash() {
        let dir = tempfile::TempDir::new().unwrap();
        let mov = dir.path().join("partial-system.mov");
        let voice = dir.path().join("partial-system.voice.wav");
        let system = dir.path().join("partial-system.system.wav");
        fs::write(&mov, b"x").unwrap();
        write_audible_wav(&voice);
        // Zero-byte system stem: simulates a partial-crash where the file
        // got created but never finalized. `.exists()` would accept this;
        // `stem_has_audio` (which discover_stem_plan invokes) catches it.
        fs::write(&system, b"").unwrap();

        let result = prepare_transcription_input(&mov);
        assert!(
            matches!(
                result,
                Err(MinutesError::Transcribe(
                    crate::error::TranscribeError::NativeCaptureStemMixUnavailable { .. }
                ))
            ),
            "zero-byte system stem must hard-error, not silently fall through to the .mov"
        );
    }

    #[cfg(unix)]
    #[test]
    fn canonicalizes_symlinked_mov_to_find_stems() {
        if !ffmpeg_available() {
            eprintln!("skipping: ffmpeg not on PATH");
            return;
        }
        // The .mov plus its stems live in one tempdir; the symlink lives
        // in another. discover_stem_plan called on the un-canonicalized
        // symlink path would look for stems in the wrong directory and
        // return None, which would map to Ok(None) and bypass the fix.
        // Canonicalize must run before stem lookup.
        let (target_dir, target_mov) = fake_native_call_capture("real-call");
        let link_dir = tempfile::TempDir::new().unwrap();
        let link = link_dir.path().join("aliased.mov");
        std::os::unix::fs::symlink(&target_mov, &link)
            .expect("symlink creation must succeed on unix");

        let result = prepare_transcription_input(&link)
            .expect("symlink resolution must succeed and stems must be found");
        let handle = result
            .expect("symlinked .mov must resolve to canonical target and mix the stems there");
        assert!(handle.as_path().exists(), "mixed PCM must exist post-mix");

        // Drop the handle before the tempdirs so cleanup is observable.
        drop(handle);
        drop(target_dir);
        drop(link_dir);
    }
}
