feat(workspace): name tonight's first fade plan on the map

AGENTS.md

@@ -2,6 +2,7 @@
 
 ## Project overview
 - BandScope is a local-first desktop app for rehearsal prep: a practical song view with likely harmony by section and by instrument or vocal role, form and groove cues, stems, playable ranges, simplification guidance, transposition or setup cues, part-overlap cues, visible confidence, and rehearsal priorities.
+- Name tonight's first fade plan with the owning part when a staying named role is corroborated, the owned `fadePlan` copy, the labeled section, and the time so the next action is obvious. Do not invent that copy from groove, cue, simplification, overlap, range, chord labels, function labels, setup notes, transposition plans, vamp plans, fill plans, tuning plans, dynamics plans, articulation plans, hook plans, solo plans, pad plans, hit plans, cutoff plans, turnaround plans, pickup plans, breakdown plans, drop plans, swell plans, confirmed overrides, harmonic explanations, or confidence notes.
 - Authoritative delivery rules live in `ARCHITECTURE.md`, `docs/plans/`, and the root verification scripts.
 - Brand, tone, UX copy, and prioritization rules live in `docs/brand-story.md` and must be applied to PRDs, TRDs, UI copy, onboarding, empty states, and error messages.
 - App security rules live in `docs/security/app-security.md` and must be applied to file handling, URL intake, subprocesses, IPC, WebView usage, model loading, updates, logging, cache handling, and export behavior.

ARCHITECTURE.md

@@ -83,6 +83,7 @@ Last updated: 2026-03-11
   - section roadmap with entries, dropouts, pickups, stops, tags, and handoffs
   - groove and timing cues relevant to locking the band together
   - playable ranges and density or overlap warnings, with the ready workspace naming tonight's first span and the next instrument check
+  - tonight's first fade plan on the mounted map when section-level stem energy shows a corroborated intensity fall (same distinct source set stays, named vocals or bass previous RMS ≥1.8× current after already-audible previous, current still audible), with Open moving to the matching rendered map section. Heuristic-only topology stays unnamed. Distinct from first-swell, first-drop, first-breakdown, first-dropout, first-cutoff, first-stop, first-pickup, and first-turnaround. Accompaniment other never owns.
   - simplification, transposition, capo, tuning, or setup cues where applicable
   - role-specific rehearsal priorities and confidence flags
   - cue-sheet or chart-style exports that summarize the analysis in rehearsal-friendly form

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Added
 
+- Name tonight's first fade plan in the mounted rehearsal workspace so the part that quiets in place can land the next downbeat on the map; real analyzed songs now receive this guidance only when section-level stem energy shows the same distinct source set staying while named vocals or bass RMS falls by at least 1.8× after an already-audible previous section and the current section stays audible, while heuristic-only topology remains unavailable. Open moves to the matching rendered map section, and inherited, accessor-backed, or Proxy-substituted runtime metadata remains guidance-only instead of becoming copy, identity, timing, or navigation authority.
 - Name tonight's first playable range on the ready rehearsal map and tell the player to check that span on their instrument before the section.
 - Display the analyzed song tempo (BPM) as a badge in the rehearsal workspace.
 - 각 합주 역할(Role)별 개인 연습 진행도를 0~100% 범위로 기록 및 시각화할 수 있는 연습 진척도(`practiceProgress`) 트래커 기능 추가. UI 컨트롤(슬라이더 및 +/- 버튼)과 한/영 다국어 지원 포함.

CLAUDE.md

@@ -51,7 +51,7 @@ BandScope is a local-first desktop app for rehearsal prep: it turns a song into
 
 Three layers, decoupled through shared contracts:
 
-- `apps/desktop` — Tauri 2 + Vite + React 19 shell (Tailwind 4, Base UI, Storybook). Feature screens live in `src/features/` (home, workspace, chords, ranges, player, settings). The ready workspace names tonight's first playable range and the next instrument check. `src/lib/analysis.ts` and `src/lib/job_runner.ts` call typed Tauri IPC commands, with a browser fallback that serves demo data when not running inside Tauri.
+- `apps/desktop` — Tauri 2 + Vite + React 19 shell (Tailwind 4, Base UI, Storybook). Feature screens live in `src/features/` (home, workspace, chords, ranges, player, settings). The mounted workspace names tonight's first fade plan and opens the matching rendered map section. The ready workspace names tonight's first playable range and the next instrument check. Do not invent that copy from groove, cue, simplification, overlap, range, chord labels, function labels, setup notes, transposition plans, vamp plans, fill plans, tuning plans, dynamics plans, articulation plans, hook plans, solo plans, pad plans, hit plans, cutoff plans, turnaround plans, pickup plans, breakdown plans, drop plans, swell plans, confirmed overrides, harmonic explanations, or confidence notes. Distinct from first-swell, first-drop, first-breakdown, first-dropout, first-cutoff, first-stop, first-pickup, and first-turnaround. `src/lib/analysis.ts` and `src/lib/job_runner.ts` call typed Tauri IPC commands, with a browser fallback that serves demo data when not running inside Tauri.
 - `apps/desktop/src-tauri/src/main.rs` — the Rust orchestration boundary. Tauri commands (`start_analysis_job`, `get_analysis_job_status`, `select_local_audio_source`, `import_youtube_url`) validate untrusted input (project IDs, file paths, URLs) and spawn the Python engine as a subprocess. There is no loopback HTTP listener and no network path for local analysis.
 - `services/analysis-engine` — Python package `bandscope_analysis` (librosa/numpy). Entry point `cli.py` reads a JSON job request on stdin and prints a structured job-status JSON envelope on stdout (`--progress-jsonl` streams progress lines). `api.py` orchestrates the pipeline across the `separation`, `sections`, `roles`, `chords`, `ranges`, `temporal`, `transcription`, and `youtube` modules.
 

apps/desktop/core/src/lib.rs

@@ -176,21 +176,68 @@ pub struct ManualOverridePayload {
     source: String,
 }
 
+#[derive(Clone, Debug, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase", deny_unknown_fields)]
+struct TranscriptionNotePayload {
+    pitch: String,
+    onset: f64,
+    offset: f64,
+    velocity: f64,
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+#[serde(rename_all = "lowercase")]
+enum FadePlanSourcePayload {
+    Model,
+    User,
+}
+
+fn deserialize_practice_progress<'de, D>(deserializer: D) -> Result<Option<u8>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let progress = Option::<u8>::deserialize(deserializer)?;
+    if let Some(value) = progress {
+        if value > 100 {
+            return Err(serde::de::Error::custom(
+                "practiceProgress must be between 0 and 100",
+            ));
+        }
+    }
+    Ok(progress)
+}
+
 #[derive(Clone, Debug, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
 pub struct RehearsalRolePayload {
     id: String,
     name: String,
     role_type: String,
     harmony: HarmonyPayload,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    harmonic_explanation: Option<String>,
     cue: CuePayload,
     range: RangePayload,
     confidence: ConfidencePayload,
     rehearsal_priority: String,
     simplification: String,
     setup_note: String,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    transposition_plan: Option<String>,
     manual_overrides: Vec<ManualOverridePayload>,
     overlap_warnings: Vec<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    transcription: Option<Vec<TranscriptionNotePayload>>,
+    #[serde(
+        default,
+        deserialize_with = "deserialize_practice_progress",
+        skip_serializing_if = "Option::is_none"
+    )]
+    practice_progress: Option<u8>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    fade_plan: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    fade_plan_source: Option<FadePlanSourcePayload>,
 }
 
 #[derive(Clone, Debug, Serialize)]
@@ -527,9 +574,67 @@ pub fn is_youtube_video_id(value: &str) -> bool {
             .all(|byte| byte.is_ascii_alphanumeric() || byte == b'_' || byte == b'-')
 }
 
+fn is_plan_whitespace(value: char) -> bool {
+    matches!(
+        value,
+        '\u{0009}'..='\u{000D}'
+            | '\u{0020}'
+            | '\u{0085}'
+            | '\u{00A0}'
+            | '\u{1680}'
+            | '\u{2000}'..='\u{200A}'
+            | '\u{2028}'
+            | '\u{2029}'
+            | '\u{202F}'
+            | '\u{205F}'
+            | '\u{3000}'
+            | '\u{FEFF}'
+    )
+}
+
+/// Mirrors shared-types plan validation without normalizing persisted text.
+fn is_valid_fade_plan(value: &str) -> bool {
+    let mut has_non_whitespace = false;
+    for character in value.chars() {
+        if matches!(
+            character,
+            '\n' | '\r' | '\u{000B}' | '\u{000C}' | '\u{0085}' | '\u{2028}' | '\u{2029}'
+        ) {
+            return false;
+        }
+        if !is_plan_whitespace(character) {
+            has_non_whitespace = true;
+        }
+    }
+    has_non_whitespace
+}
+
+pub fn validate_fade_plan_provenance(
+    payload: RehearsalSongPayload,
+) -> Result<RehearsalSongPayload, String> {
+    for section in &payload.sections {
+        for role in &section.roles {
+            if role
+                .fade_plan
+                .as_deref()
+                .is_some_and(|fade_plan| !is_valid_fade_plan(fade_plan))
+            {
+                return Err("Invalid project file format".to_string());
+            }
+            if role.fade_plan.is_none() && role.fade_plan_source.is_some() {
+                return Err("Invalid project file format".to_string());
+            }
+            if role.fade_plan.is_some() && role.fade_plan_source.is_none() {
+                return Err("Invalid project file format".to_string());
+            }
+        }
+    }
+    Ok(payload)
+}
+
 pub fn project_payload_from_content(content: &str) -> Result<RehearsalSongPayload, String> {
     if let Ok(parsed) = serde_json::from_str::<RehearsalSongPayload>(content) {
-        return Ok(parsed);
+        return validate_fade_plan_provenance(parsed);
     }
 
     let payload = serde_json::from_str::<Value>(content)
@@ -547,7 +652,9 @@ pub fn project_payload_from_content(content: &str) -> Result<RehearsalSongPayloa
         }
     }
 
-    serde_json::from_value(payload).map_err(|_| "Invalid project file format".to_string())
+    let parsed =
+        serde_json::from_value(payload).map_err(|_| "Invalid project file format".to_string())?;
+    validate_fade_plan_provenance(parsed)
 }
 
 #[derive(Clone, Debug, Serialize)]

apps/desktop/core/tests/fade_plan_contract.rs

@@ -0,0 +1,193 @@
+use bandscope_desktop_core::project_payload_from_content;
+use serde_json::{json, Value};
+
+fn song_with_fade_plan() -> Value {
+    json!({
+        "id": "analyzed-song",
+        "title": "Late Night Set",
+        "sections": [
+            {
+                "id": "chorus-1",
+                "label": "chorus",
+                "groove": "Lifted chorus downbeat",
+                "timeRange": { "start": 30, "end": 46 },
+                "confidence": {
+                    "level": "high",
+                    "source": "model",
+                    "notes": "Stem energy corroborates the fade."
+                },
+                "roles": [
+                    {
+                        "id": "lead-vocal",
+                        "name": "Lead Vocal",
+                        "roleType": "vocal",
+                        "harmony": {
+                            "chord": "C#m7",
+                            "functionLabel": "vi landing",
+                            "source": "model"
+                        },
+                        "harmonicExplanation": "The landing keeps the tonal floor clear.",
+                        "cue": {
+                            "kind": "transition",
+                            "value": "Let the next downbeat land quieter."
+                        },
+                        "range": {
+                            "lowestNote": "G#3",
+                            "highestNote": "C#5"
+                        },
+                        "confidence": {
+                            "level": "high",
+                            "source": "model",
+                            "notes": "Vocal stays while the level comes down."
+                        },
+                        "rehearsalPriority": "high",
+                        "simplification": "Hold the landing syllable.",
+                        "setupNote": "Keep the attack short.",
+                        "transpositionPlan": "Keep the landing shape a whole step lower if needed.",
+                        "manualOverrides": [],
+                        "overlapWarnings": [],
+                        "transcription": [{
+                            "pitch": "C#4",
+                            "onset": 1.0,
+                            "offset": 1.5,
+                            "velocity": 0.8
+                        }],
+                        "practiceProgress": 50,
+                        "fadePlan": "Fade this part; let the next downbeat land quieter.",
+                        "fadePlanSource": "model"
+                    }
+                ],
+                "partGraph": [
+                    {
+                        "role_id": "lead-vocal",
+                        "is_active": true,
+                        "handoff_to": [],
+                        "handoff_from": []
+                    }
+                ]
+            }
+        ],
+        "exportSummary": {
+            "format": "cue-sheet",
+            "headline": "Let the chorus fade together.",
+            "focusSections": ["chorus-1"]
+        }
+    })
+}
+
+#[test]
+fn project_contract_round_trips_fade_plan_provenance() {
+    let payload = song_with_fade_plan();
+    let content = serde_json::to_string(&payload).expect("fixture should serialize");
+
+    let parsed = project_payload_from_content(&content)
+        .expect("native project contract must accept shared fade-plan fields");
+    let serialized =
+        serde_json::to_value(parsed).expect("native project contract should serialize");
+
+    assert_eq!(
+        serialized["sections"][0]["roles"][0]["fadePlan"],
+        payload["sections"][0]["roles"][0]["fadePlan"]
+    );
+    assert_eq!(
+        serialized["sections"][0]["roles"][0]["fadePlanSource"],
+        json!("model")
+    );
+}
+
+#[test]
+fn project_contract_rejects_fade_plan_source_without_fade_plan() {
+    let mut payload = song_with_fade_plan();
+    payload["sections"][0]["roles"][0]
+        .as_object_mut()
+        .expect("role fixture should be an object")
+        .remove("fadePlan");
+    let content = serde_json::to_string(&payload).expect("fixture should serialize");
+
+    assert!(
+        project_payload_from_content(&content).is_err(),
+        "native persisted contract must reject provenance without the value it describes"
+    );
+}
+
+#[test]
+fn project_contract_rejects_fade_plan_without_source() {
+    let mut payload = song_with_fade_plan();
+    payload["sections"][0]["roles"][0]
+        .as_object_mut()
+        .expect("role fixture should be an object")
+        .remove("fadePlanSource");
+    let content = serde_json::to_string(&payload).expect("fixture should serialize");
+
+    assert!(
+        project_payload_from_content(&content).is_err(),
+        "native persisted contract must reject fade-plan copy without provenance"
+    );
+}
+
+#[test]
+fn project_contract_rejects_invalid_fade_plan_copy_with_source() {
+    for fade_plan in [
+        "",
+        "   ",
+        "\u{00A0}\u{2003}\u{3000}",
+        "fade here\nthen hold",
+        "fade here\rthen hold",
+        "fade here\u{000B}then hold",
+        "fade here\u{000C}then hold",
+        "fade here\u{0085}then hold",
+        "fade here\u{2028}then hold",
+        "fade here\u{2029}then hold",
+    ] {
+        let mut payload = song_with_fade_plan();
+        payload["sections"][0]["roles"][0]["fadePlan"] = json!(fade_plan);
+        let content = serde_json::to_string(&payload).expect("fixture should serialize");
+
+        assert!(
+            project_payload_from_content(&content).is_err(),
+            "native persisted contract must reject blank or multiline sourced fade-plan copy"
+        );
+    }
+}
+
+#[test]
+fn project_contract_rejects_unknown_fade_plan_source() {
+    let mut payload = song_with_fade_plan();
+    payload["sections"][0]["roles"][0]["fadePlanSource"] = json!("legacy");
+    let content = serde_json::to_string(&payload).expect("fixture should serialize");
+
+    assert!(
+        project_payload_from_content(&content).is_err(),
+        "native persisted contract must reject provenance outside model/user"
+    );
+}
+
+#[test]
+fn project_contract_preserves_padded_single_line_fade_copy() {
+    let mut payload = song_with_fade_plan();
+    payload["sections"][0]["roles"][0]["fadePlan"] = json!("  Fade together. \u{00A0}");
+    payload["sections"][0]["roles"][0]["fadePlanSource"] = json!("user");
+    let content = serde_json::to_string(&payload).expect("fixture should serialize");
+
+    let parsed = project_payload_from_content(&content)
+        .expect("native persisted contract must preserve padded single-line copy");
+    let serialized =
+        serde_json::to_value(parsed).expect("native project contract should serialize");
+
+    assert_eq!(
+        serialized["sections"][0]["roles"][0]["fadePlan"],
+        payload["sections"][0]["roles"][0]["fadePlan"]
+    );
+}
+
+#[test]
+fn project_contract_rejects_practice_progress_above_shared_bound() {
+    let mut payload = song_with_fade_plan();
+    payload["sections"][0]["roles"][0]["practiceProgress"] = json!(101);
+    let content = serde_json::to_string(&payload).expect("fixture should serialize");
+
+    assert!(
+        project_payload_from_content(&content).is_err(),
+        "native persisted contract must reject practiceProgress above the shared 0..=100 bound"
+    );
+}

apps/desktop/src-tauri/src/main.rs

@@ -740,8 +740,11 @@ async fn import_youtube_url(
 
 #[tauri::command]
 fn save_project(payload: Value) -> Result<(), String> {
-    let parsed = serde_json::from_value::<RehearsalSongPayload>(payload)
-        .map_err(|_| "Invalid project payload".to_string())?;
+    let parsed = validate_fade_plan_provenance(
+        serde_json::from_value::<RehearsalSongPayload>(payload)
+            .map_err(|_| "Invalid project payload".to_string())?,
+    )
+    .map_err(|_| "Invalid project payload".to_string())?;
 
     let path = FileDialog::new()
         .add_filter("BandScope Project", &["bscope", "json"])