exporter: remove stage voice entries for deleted instruments

Phase 4 — remove edit-state flags from domain objects:
- ast-parser.js: drop isDirty from buildInstrument, buildBar, buildStemNote
- store.js: add resetEditState()
- PaneCP.js: use resetEditState() on import; drop flags arg from patchScore
- PaneFO.js: isDirty -> _modified for linked instruments; no per-node dirty tracking
- PaneSubObjects.js: _spliceNode helper; deletion via splice; _isNew on new bars
- exporter.js: on-demand traversal; absence from model means deleted

Phase 5 — article parser and exporter:
- ast-parser.js: _buildArticleEntry replaces _mergeArticleEntry; stage.article and
  voice.article dispatch; article properties carry scope and overwritten flag
- exporter.js: _buildArticlesBlock emits -important: list for overwrites scope

Phase 6 — stem note dead fields:
- ast-parser.js: parse weight and articulatory on stem notes; flatten
  article.definite properties onto stem note model sibling to pitch/chain

static/api.js

@@ -2,45 +2,30 @@ const U = window.NEUSICIAN_URLS;
 
 export const URLS = U;
 
-function authHeader(credentials) {
-    if (!credentials) return {};
-    const b64 = btoa(`${credentials.username}:${credentials.password}`);
-    return { Authorization: `Basic ${b64}` };
-}
-
-export async function fetchAstLog(credentials) {
-    const res = await fetch(U.astlog, {
-        headers: authHeader(credentials),
-    });
+export async function fetchAstLog() {
+    const res = await fetch(U.astlog);
     if (!res.ok) throw new Error(`${res.status} ${res.statusText}`);
     return res.text();
 }
 
-export async function fetchScoreText(credentials) {
-    const res = await fetch(U.score, {
-        headers: authHeader(credentials),
-    });
+export async function fetchScoreText() {
+    const res = await fetch(U.score);
     if (!res.ok) throw new Error(`${res.status} ${res.statusText}`);
     return res.text();
 }
 
-export async function putScoreText(text, credentials) {
+export async function putScoreText(text) {
     const res = await fetch(U.score, {
         method: 'PUT',
-        headers: {
-            ...authHeader(credentials),
-            'Content-Type': 'text/yaml',
-        },
+        headers: { 'Content-Type': 'text/yaml' },
         body: text,
     });
     if (!res.ok) throw new Error(`${res.status} ${res.statusText}`);
     return res;
 }
 
-export async function fetchStatus(credentials) {
-    const res = await fetch(U.status, {
-        headers: authHeader(credentials),
-    });
+export async function fetchStatus() {
+    const res = await fetch(U.status);
     if (!res.ok) throw new Error(`${res.status} ${res.statusText}`);
     return res.json();
 }

static/ast-parser.js

@@ -1,16 +1,8 @@
+import { coerce } from './util.js';
+
 const LINE_RE = /^(\d{2}) (\S+(?:\.\S+)*) ?(.*)/;
 const DEBUG_RE = /^\d{2} # DEBUG/;
 
-
-function coerce(s) {
-    if (s === 'True' || s === 'Y' || s === 'on' || s === 'true') return true;
-    if (s === 'False' || s === 'N' || s === 'off' || s === 'false') return false;
-    if (s === '') return s;
-    const n = Number(s);
-    if (!isNaN(n)) return n;
-    return s;
-}
-
 export function parseAstLog(text) {
     const root = { slot: 'root', parentSlot: null, depth: -1, positionals: [], props: {}, children: [] };
     const stack = [root];
@@ -33,15 +25,19 @@ export function parseAstLog(text) {
             slot = slotFull.slice(dotIdx + 1);
         }
 
-        const { positionals, props } = parseRest(rest);
+        const { positionals, props } = _parseRest(rest);
 
         const node = { slot, parentSlot, depth, positionals, props, children: [] };
 
-        // Pop stack to find correct parent (parent must have depth < current)
         while (stack.length > 1 && stack[stack.length - 1].depth >= depth) {
             stack.pop();
         }
 
+        if (depth > stack[stack.length - 1].depth + 1)
+            throw new Error(`AST log malformed: depth jump to ${depth} at: ${line}`);
+        if (depth > 0 && !slotFull.includes('.'))
+            throw new Error(`AST log malformed: missing slot at depth ${depth}: ${line}`);
+
         stack[stack.length - 1].children.push(node);
         stack.push(node);
     }
@@ -49,59 +45,25 @@ export function parseAstLog(text) {
     return root;
 }
 
-function parseRest(rest) {
+const _REST_TOKEN = /(\w+=)?('[^']*'|\S+)/g;
+
+function _parseRest(rest) {
     const positionals = [];
     const props = {};
-    let i = 0;
-    const n = rest.length;
     let inProps = false;
 
-    while (i < n) {
-        // skip spaces
-        while (i < n && rest[i] === ' ') i++;
-        if (i >= n) break;
-
-        if (rest[i] === "'") {
-            // single-quoted value (positional string)
-            const j = rest.indexOf("'", i + 1);
-            const val = rest.slice(i + 1, j === -1 ? n : j);
-            i = j === -1 ? n : j + 1;
-            if (!inProps) positionals.push(val);
-        } else {
-            // scan to next space
-            let j = i;
-            while (j < n && rest[j] !== ' ') j++;
-            const tok = rest.slice(i, j);
-            i = j;
-
-            const eqIdx = tok.indexOf('=');
-            if (eqIdx !== -1) {
-                inProps = true;
-                const key = tok.slice(0, eqIdx);
-                let rawVal = tok.slice(eqIdx + 1);
-
-                if (rawVal.startsWith("'")) {
-                    // value continues until next single quote
-                    const valStart = i - (tok.length - eqIdx - 1);
-                    // find closing quote: search from after the opening quote
-                    const openPos = rest.indexOf("'", rest.lastIndexOf(key + '=', i) + key.length + 1);
-                    const closePos = rest.indexOf("'", openPos + 1);
-                    rawVal = closePos === -1 ? rest.slice(openPos + 1) : rest.slice(openPos + 1, closePos);
-                    i = closePos === -1 ? n : closePos + 1;
-                }
-
-                props[key] = coerce(rawVal);
-            } else if (!inProps) {
-                positionals.push(coerce(tok));
-            }
-            // bare token after props start is ignored (shouldn't happen per spec)
-        }
+    for (const [, keyEq, raw] of rest.matchAll(_REST_TOKEN)) {
+        const val = coerce(raw.startsWith("'") ? raw.slice(1, -1) : raw);
+        if (keyEq !== undefined) { inProps = true; props[keyEq.slice(0, -1)] = val; }
+        else if (!inProps)       { positionals.push(val); }
     }
 
     return { positionals, props };
 }
 
-// ── Second pass: build typed model ──────────────────────────────────────────
+function _collectUnknownProps(nodeProps, knownKeys) {
+    return Object.fromEntries(Object.entries(nodeProps).filter(([k]) => !knownKeys.has(k)));
+}
 
 export function buildModel(rawTree) {
     const score = {
@@ -109,95 +71,139 @@ export function buildModel(rawTree) {
         info: null,
         tuning: null,
         articles: [],
+        stageCone: null,
         stageVoices: [],
         instruments: [],
         bars: [],
     };
 
+    // Upstream uses `with deeper_level("articles"):` / `deeper_level("stage"):`
+    // implicit containers that emit no depth-00 header. Their depth-01 lines get
+    // nested under the preceding `00 tuning` by the depth-stack parser even
+    // though they are conceptually siblings of tuning. Un-nest them here.
+    const topLevel = [];
     for (const node of rawTree.children) {
-        switch (node.slot) {
+        if (node.parentSlot === null && node.slot === 'tuning') {
+            const trulyTuning = [];
+            const misnested = [];
+            for (const child of node.children) {
+                if (child.parentSlot === 'tuning') trulyTuning.push(child);
+                else misnested.push(child);
+            }
+            topLevel.push({ ...node, children: trulyTuning });
+            topLevel.push(...misnested);
+        } else {
+            topLevel.push(node);
+        }
+    }
+
+    for (const node of topLevel) {
+        const fqSlot = node.parentSlot ? `${node.parentSlot}.${node.slot}` : node.slot;
+        switch (fqSlot) {
             case 'info':
                 score.info = { ...node.props };
                 break;
             case 'tuning':
-                score.tuning = buildTuning(node);
+                score.tuning = _buildTuning(node);
                 break;
-            case 'article':
-                score.articles.push(buildArticle(node));
+            case 'stage.cone':
+                score.stageCone = { type: 'stage_cone', ...node.props };
                 break;
-            case 'stage_voice':
-                score.stageVoices.push({
+            case 'stage.article':
+                score.articles.push(_buildArticleEntry(node));
+                break;
+            case 'stage.voice': {
+                const sv = {
+                    type: 'stage_voice',
                     name: node.positionals[0],
                     direction: node.props.direction,
                     distance: node.props.distance,
-                });
+                    articles: [],
+                };
+                for (const child of node.children) {
+                    if (child.parentSlot === 'voice' && child.slot === 'article')
+                        sv.articles.push(_buildArticleEntry(child));
+                }
+                score.stageVoices.push(sv);
                 break;
+            }
             case 'instrument':
-                score.instruments.push(buildInstrument(node));
+                score.instruments.push(_buildInstrument(node));
                 break;
             case 'bar':
-                score.bars.push(buildBar(node));
+                score.bars.push(_buildBar(node));
                 break;
             default:
-                score[node.slot] = buildGeneric(node);
+                score[node.slot] = _buildGeneric(node);
         }
     }
 
     return score;
 }
 
-function buildTuning(node) {
-    const t = { base: node.props.base, scales: {}, chords: {} };
+function _buildArticleEntry(node) {
+    const entry = { type: 'article', name: node.positionals[0], properties: [] };
+    for (const child of node.children) {
+        if (child.parentSlot !== 'article') continue;
+        if (child.slot === 'defaults' || child.slot === 'definite') {
+            const raw = child.props.constant ?? child.props.stacked ?? child.props.static;
+            const shapeChild = child.children.find(c => c.slot === 'shape');
+            const value = raw !== undefined ? coerce(raw) : (shapeChild ? _buildShape(shapeChild) : null);
+            entry.properties.push({ name: child.positionals[0], value, scope: child.slot, overwritten: child.props.overwritten ?? false });
+        } else if (child.slot === 'overwrites') {
+            for (const propName of child.positionals) {
+                entry.properties.push({ name: propName, value: null, scope: 'overwrites' });
+            }
+        }
+    }
+    return entry;
+}
+
+function _buildTuning(node) {
+    const t = { type: 'tuning', base: node.props.base, scales: {}, chords: {}, frequencyFactors: null };
     for (const child of node.children) {
         if (child.slot === 'scales') {
             t.scales[child.positionals[0]] = child.positionals.slice(1);
         } else if (child.slot === 'chords') {
             t.chords[child.positionals[0]] = child.positionals.slice(1);
+        } else if (child.slot === 'frequency_factors') {
+            t.frequencyFactors = {
+                label: child.props.label ?? null,
+                factors: child.positionals.slice(),
+            };
         }
     }
     return t;
 }
 
-function buildArticle(node) {
-    return {
-        type: 'article',
-        name: node.positionals[0],
-        props: { ...node.props },
-        properties: node.children
-            .filter(c => c.slot === 'property')
-            .map(c => ({ name: c.positionals[0], ...c.props })),
-    };
-}
-
-function buildInstrument(node) {
+function _buildInstrument(node) {
     const instr = {
         type: 'instrument',
         name: node.positionals[0],
         notChangedSince: node.props.NOT_CHANGED_SINCE ?? null,
         isLinked: (node.positionals[0] ?? '').includes('/'),
-        isDirty: false,
         variations: [],
         basicProperties: null,
         volumes: null,
         timbre: null,
         fmModulations: [],
         amModulations: [],
-        rawChildren: [],
+        unknownSlots: [],
     };
 
     for (const child of node.children) {
         switch (child.parentSlot + '.' + child.slot) {
             case 'character.variation':
-                instr.variations.push(buildVariation(child));
+                instr.variations.push(_buildVariation(child));
                 break;
             case 'character.basic_properties':
-                instr.basicProperties = buildBasicProperties(child);
+                instr.basicProperties = _buildBasicProperties(child);
                 break;
             case 'VOLUMES.shape':
-                instr.volumes = buildShape(child);
+                instr.volumes = _buildShape(child);
                 break;
             case 'TIMBRE.shape':
-                instr.timbre = buildShape(child);
+                instr.timbre = _buildShape(child);
                 break;
             case 'FM.modulation':
                 instr.fmModulations.push({ ...child.props });
@@ -206,14 +212,14 @@ function buildInstrument(node) {
                 instr.amModulations.push({ ...child.props });
                 break;
             default:
-                instr.rawChildren.push(buildGeneric(child));
+                instr.unknownSlots.push(_buildGeneric(child));
         }
     }
 
     return instr;
 }
 
-function buildVariation(node) {
+function _buildVariation(node) {
     const v = {
         type: 'variation',
         dependsOn: node.props.depends_on ?? node.props.for_value ?? null,
@@ -222,85 +228,85 @@ function buildVariation(node) {
         subvariations: [],
         spread: null,
         railsbackCurve: null,
-        rawChildren: [],
+        unknownSlots: [],
     };
 
     for (const child of node.children) {
         const key = (child.parentSlot ?? child.slot) + '.' + child.slot;
         switch (key) {
             case 'variation.basic_properties':
-                v.basicProperties = buildBasicProperties(child);
+                v.basicProperties = _buildBasicProperties(child);
                 break;
             case 'variation.label_spec':
-                v.labelSpecs.push(buildLabelSpec(child));
+                v.labelSpecs.push(_buildLabelSpec(child));
                 break;
             case 'variation.subvariation':
-                v.subvariations.push(buildVariation(child));
+                v.subvariations.push(_buildVariation(child));
                 break;
             case 'variation.SPREAD':
                 v.spread = child.positionals;
                 break;
             case 'RAILSBACK_CURVE.shape':
-                v.railsbackCurve = buildShape(child);
+                v.railsbackCurve = _buildShape(child);
                 break;
             default:
-                v.rawChildren.push(buildGeneric(child));
+                v.unknownSlots.push(_buildGeneric(child));
         }
     }
 
     return v;
 }
 
-function buildBasicProperties(node) {
+function _buildBasicProperties(node) {
     const bp = {
         type: 'basic_properties',
         A: null, S: null, R: null,
         oscillator: null,
         fmModulations: [],
         amModulations: [],
-        rawChildren: [],
+        unknownSlots: [],
     };
 
     for (const child of node.children) {
         const fqSlot = (child.parentSlot ?? '') + (child.parentSlot ? '.' : '') + child.slot;
         if (child.parentSlot === 'A' && child.slot === 'shape') {
-            bp.A = buildShape(child);
+            bp.A = _buildShape(child);
         } else if (child.parentSlot === 'S' && child.slot === 'shape') {
-            bp.S = buildShape(child);
+            bp.S = _buildShape(child);
         } else if (child.parentSlot === 'R' && child.slot === 'shape') {
-            bp.R = buildShape(child);
+            bp.R = _buildShape(child);
         } else if (child.parentSlot === 'variation' && child.slot === 'O') {
             bp.oscillator = child.props.ref ?? child.positionals[0];
         } else if (child.parentSlot === 'FM' && child.slot === 'modulation') {
             const fm = { ...child.props };
             const envChild = child.children.find(c => c.slot === 'shape');
-            if (envChild) fm.shape = buildShape(envChild);
+            if (envChild) fm.shape = _buildShape(envChild);
             bp.fmModulations.push(fm);
         } else if (child.parentSlot === 'AM' && child.slot === 'modulation') {
             const am = { ...child.props };
             const envChild = child.children.find(c => c.slot === 'shape');
-            if (envChild) am.shape = buildShape(envChild);
+            if (envChild) am.shape = _buildShape(envChild);
             bp.amModulations.push(am);
         } else {
-            bp.rawChildren.push(buildGeneric(child));
+            bp.unknownSlots.push(_buildGeneric(child));
         }
     }
 
     return bp;
 }
 
-function buildLabelSpec(node) {
+function _buildLabelSpec(node) {
     const ls = {
         type: 'label_spec',
         label: node.positionals[0],
         basicProperties: null,
-        rawChildren: [],
+        unknownSlots: [],
     };
 
     const directBpChildren = [];
     for (const child of node.children) {
         if (child.parentSlot === 'variation' && child.slot === 'basic_properties') {
-            ls.basicProperties = buildBasicProperties(child);
+            ls.basicProperties = _buildBasicProperties(child);
         } else if (
             (child.slot === 'shape' && (child.parentSlot === 'A' || child.parentSlot === 'S' || child.parentSlot === 'R')) ||
             (child.parentSlot === 'variation' && child.slot === 'O') ||
@@ -308,17 +314,17 @@ function buildLabelSpec(node) {
         ) {
             directBpChildren.push(child);
         } else {
-            ls.rawChildren.push(buildGeneric(child));
+            ls.unknownSlots.push(_buildGeneric(child));
         }
     }
     if (!ls.basicProperties && directBpChildren.length > 0) {
-        ls.basicProperties = buildBasicProperties({ children: directBpChildren });
+        ls.basicProperties = _buildBasicProperties({ children: directBpChildren });
     }
 
     return ls;
 }
 
-function buildShape(node) {
+function _buildShape(node) {
     return {
         type: 'shape',
         length: node.props.length,
@@ -334,11 +340,10 @@ function buildShape(node) {
     };
 }
 
-function buildBar(node) {
+function _buildBar(node) {
     const bar = {
         type: 'bar',
         id: node.positionals[0] ?? '',
-        isDirty: false,
         stressor: null,
         tempoShape: null,
         tempoLevels: null,
@@ -346,42 +351,42 @@ function buildBar(node) {
         upperStressBound: null,
         tunings: [],
         voices: {},
-        rawChildren: [],
+        unknownSlots: [],
     };
 
     for (const child of node.children) {
         const fqSlot = (child.parentSlot ?? '') + (child.parentSlot ? '.' : '') + child.slot;
         switch (fqSlot) {
             case 'stress_pattern.stressor':
-                bar.stressor = buildStressor(child);
+                bar.stressor = _buildStressor(child);
                 break;
             case 'tempo.shape':
-                bar.tempoShape = buildShape(child);
+                bar.tempoShape = _buildShape(child);
                 break;
             case 'tempo.levels':
                 bar.tempoLevels = child.positionals[0];
                 break;
             case 'lower_stress_bound.shape':
-                bar.lowerStressBound = buildShape(child);
+                bar.lowerStressBound = _buildShape(child);
                 break;
             case 'upper_stress_bound.shape':
-                bar.upperStressBound = buildShape(child);
+                bar.upperStressBound = _buildShape(child);
                 break;
             case 'bar.tuning':
                 bar.tunings.push({ ...child.props });
                 break;
             case 'bar.voice':
-                bar.voices[child.positionals[0]] = buildVoice(child);
+                bar.voices[child.positionals[0]] = _buildVoice(child);
                 break;
             default:
-                bar.rawChildren.push(buildGeneric(child));
+                bar.unknownSlots.push(_buildGeneric(child));
         }
     }
 
     return bar;
 }
 
-function buildStressor(node) {
+function _buildStressor(node) {
     const levels = [];
     let currentGroup = [];
     for (const child of node.children) {
@@ -396,7 +401,7 @@ function buildStressor(node) {
     return { type: 'stressor', groups: levels };
 }
 
-function buildVoice(node) {
+function _buildVoice(node) {
     const voice = {
         type: 'voice',
         name: node.positionals[0],
@@ -409,13 +414,13 @@ function buildVoice(node) {
         const fqSlot = (child.parentSlot ?? '') + (child.parentSlot ? '.' : '') + child.slot;
         switch (fqSlot) {
             case 'voice.offset':
-                voice.offsets.push(buildOffset(child));
+                voice.offsets.push(_buildOffset(child));
                 break;
             case 'voice.article':
-                voice.articles.push(child.positionals[0]);
+                voice.articles.push(_buildArticleEntry(child));
                 break;
             case 'voice.motif':
-                voice.motifs.push(child.props.label);
+                voice.motifs.push(_buildMotif(child));
                 break;
             default:
                 // ignore
@@ -425,75 +430,89 @@ function buildVoice(node) {
     return voice;
 }
 
-function buildOffset(node) {
+function _buildOffset(node) {
     const offset = {
         type: 'offset',
         tick: node.props.tick,
         stemNotes: [],
-        clusters: [],
-        chains: [],
+        motifRefs: [],
+        unknownProps: _collectUnknownProps(node.props, new Set(['tick'])),
     };
-
     for (const child of node.children) {
-        const fqSlot = (child.parentSlot ?? '') + (child.parentSlot ? '.' : '') + child.slot;
-        switch (fqSlot) {
-            case 'offset.stem_note':
-                offset.stemNotes.push({ pitch: child.props.pitch, effLength: child.props.eff_length });
-                break;
-            case 'offset.cluster':
-                offset.clusters.push(buildCluster(child));
-                break;
-            case 'offset.chain':
-                offset.chains.push({ index: child.positionals[0], children: child.children.map(buildGeneric) });
-                break;
-            default:
-                // ignore
-        }
+        if (child.parentSlot === 'line' && child.slot === 'stem_note')
+            offset.stemNotes.push(_buildStemNote(child));
+        else if (child.parentSlot === 'line' && child.slot === 'motif')
+            offset.motifRefs.push({ label: child.positionals[0], chord: child.props.chord ?? null });
     }
-
     return offset;
 }
 
-function buildCluster(node) {
-    const cluster = {
-        type: 'cluster',
-        index: node.positionals[0],
-        repeat: node.props.repeat ?? null,
-        notes: [],
-        pauses: [],
-        groups: [],
-        subchains: [],
-    };
-
+function _buildStemNote(node) {
+    const KNOWN = new Set(['pitch', 'eff_length', 'adj_stress', 'adjacent', 'weight', 'articulatory']);
+    const chainNode = node.children.find(c => c.parentSlot === 'stem_note' && c.slot === 'chain');
+    const writeToNode = node.children.find(c => c.parentSlot === 'stem_note' && c.slot === 'write_to');
+    const definiteProps = {};
     for (const child of node.children) {
-        switch (child.slot) {
-            case 'note':
-                cluster.notes.push({ ...child.props });
-                break;
-            case 'pause':
-                cluster.pauses.push({ length: child.props.length });
-                break;
-            case 'group':
-                cluster.groups.push({ length: child.props.length, netlength: child.props.netlength });
-                break;
-            case 'subchain':
-                cluster.subchains.push({ length: child.props.length, children: child.children.map(buildGeneric) });
-                break;
-            default:
-                // ignore
+        if (child.parentSlot === 'article' && child.slot === 'definite') {
+            const raw = child.props.constant ?? child.props.stacked ?? child.props.static;
+            const shapeChild = child.children.find(c => c.slot === 'shape');
+            definiteProps[child.positionals[0]] = raw !== undefined ? coerce(raw) : (shapeChild ? _buildShape(shapeChild) : null);
         }
     }
-
-    return cluster;
+    return {
+        type: 'stem_note',
+        pitch: node.props.pitch,
+        effLength: node.props.eff_length ?? null,
+        adjacent: node.props.adjacent ?? null,
+        adjStress: node.props.adj_stress ?? null,
+        length: null,
+        weight: node.props.weight ?? null,
+        chainText: chainNode?.props._tmp_string ?? '',
+        writeToName: writeToNode?.positionals[0] ?? null,
+        clauses: (chainNode?.children ?? [])
+            .filter(c => c.parentSlot === 'chain' && c.slot === 'clause')
+            .map(_buildClause),
+        ...definiteProps,
+        unknownProps: _collectUnknownProps(node.props, KNOWN),
+    };
 }
 
-function buildGeneric(node) {
+function _buildClause(node) {
+    return {
+        type: 'clause',
+        index: node.positionals[0] ?? 0,
+        repeat: node.props.repeat ?? null,
+        notes:  node.children.filter(c => c.slot === 'note'  && c.parentSlot === 'seq').map(c => ({ ...c.props })),
+        pauses: node.children.filter(c => c.slot === 'pause' && c.parentSlot === 'seq').map(c => ({ length: c.props.length })),
+        stacks: node.children.filter(c => c.slot === 'stack' && c.parentSlot === 'seq').map(c => ({
+            length: c.props.length, netlength: c.props.netlength,
+            notes: c.children.filter(cn => cn.slot === 'note').map(cn => ({ ...cn.props })),
+        })),
+    };
+}
+
+function _buildMotif(node) {
+    const m = {
+        type: 'motif',
+        label: node.props.label,
+        stemNotes: [],
+        unknownProps: _collectUnknownProps(node.props, new Set(['label'])),
+    };
+    for (const child of node.children) {
+        if (child.parentSlot === 'line' && child.slot === 'stem_note')
+            m.stemNotes.push(_buildStemNote(child));
+    }
+    m.isStatic = m.stemNotes.length > 0 && !m.stemNotes.some(sn => Number.isInteger(sn.pitch));
+    return m;
+}
+
+function _buildGeneric(node) {
     return {
         type: node.slot,
         parentSlot: node.parentSlot,
         depth: node.depth,
         positionals: node.positionals,
         props: node.props,
-        children: node.children.map(buildGeneric),
+        children: node.children.map(_buildGeneric),
     };
 }

static/components/AppShell.js

@@ -1,61 +1,71 @@
-import { h, ref, onMounted } from 'vue';
+import { h, ref, computed, watch } from 'vue';
 import { PaneCP } from './PaneCP.js';
 import { PaneFO } from './PaneFO.js';
 import { PaneSubObjects } from './PaneSubObjects.js';
-import { ImportDialog } from './ImportDialog.js';
+import { getKindGroups, KIND_LABEL } from '../subobject-kinds.js';
 
-const PANES = [
-    { id: 'cp',   label: 'Position' },
-    { id: 'fo',   label: 'Object' },
-    { id: 'sub',  label: 'Sub-objects' },
+const FIXED_PANES = [
+    { id: 'cp', label: 'CP', title: 'Current position' },
+    { id: 'fo', label: 'FO', title: 'Focused object' },
 ];
 
 export const AppShell = {
     props: ['store', 'importOnLoad'],
     setup(props) {
         const activePane = ref('cp');
-        const showImport = ref(false);
 
-        function openImport() {
-            if (!props.store.isDirty) showImport.value = true;
+        function focusedNode() {
+            const fp = props.store.focusPath;
+            return fp.length ? fp[fp.length - 1] : props.store.scoreModel;
         }
 
-        onMounted(() => {
-            if (props.importOnLoad && !props.store.isDirty) showImport.value = true;
+        const subPanes = computed(() => getKindGroups(focusedNode()).map(g => ({
+            id: `sub:${g.kind}`,
+            kind: g.kind,
+            label: KIND_LABEL[g.kind] ?? g.kind.slice(0, 2).toUpperCase(),
+            title: g.kind,
+        })));
+
+        const panes = computed(() => [...FIXED_PANES, ...subPanes.value]);
+
+        // If active pane disappears after focus change, drop back to FO.
+        watch(panes, ps => {
+            if (!ps.some(p => p.id === activePane.value)) activePane.value = 'fo';
         });
 
         return () => {
             const store = props.store;
+            const ap = activePane.value;
+
+            const subPaneNodes = subPanes.value.map(p =>
+                h('div', { key: p.id, class: ['se-pane', ap === p.id ? 'active' : null] },
+                    h(PaneSubObjects, { store, kind: p.kind, onFocusFO: () => { activePane.value = 'fo'; } })));
 
             return h('div', { class: 'se-shell' }, [
-                // Pane area
                 h('div', { class: 'se-pane-area' }, [
-                    h('div', { class: ['se-pane', activePane.value === 'cp' ? 'active' : null] },
-                        h(PaneCP, { store, onImportClick: openImport, onFocusFO: () => { activePane.value = 'fo'; } })),
-                    h('div', { class: ['se-pane', activePane.value === 'fo' ? 'active' : null] },
+                    h('div', { class: ['se-pane', ap === 'cp' ? 'active' : null] },
+                        h(PaneCP, {
+                            store,
+                            importOnLoad: props.importOnLoad,
+                            onFocusFO: () => { activePane.value = 'fo'; },
+                        })),
+                    h('div', { class: ['se-pane', ap === 'fo' ? 'active' : null] },
                         h(PaneFO, { store })),
-                    h('div', { class: ['se-pane', activePane.value === 'sub' ? 'active' : null] },
-                        h(PaneSubObjects, { store, onFocusFO: () => { activePane.value = 'fo'; } })),
+                    ...subPaneNodes,
                 ]),
 
-                // Handle bar (tab switcher at bottom)
-                h('div', { class: 'se-handle-bar' }, PANES.map(p =>
+                h('div', { class: 'se-handle-bar' }, panes.value.map(p =>
                     h('button', {
                         key: p.id,
-                        class: ['se-handle', activePane.value === p.id ? 'active' : null],
+                        class: ['se-handle', ap === p.id ? 'active' : null],
+                        title: p.title,
                         onClick: () => { activePane.value = p.id; },
                     }, p.label)
                 )),
 
-                // Error banner
                 store.errorMessage
                     ? h('div', { class: 'se-error', style: 'margin:0' }, store.errorMessage)
                     : null,
-
-                // Import dialog
-                showImport.value
-                    ? h(ImportDialog, { store, onClose: () => { showImport.value = false; } })
-                    : null,
             ]);
         };
     },

static/components/ImportDialog.js

@@ -1,66 +0,0 @@
-import { h, ref } from 'vue';
-import { fetchAstLog } from '../api.js';
-import { parseAstLog, buildModel } from '../ast-parser.js';
-
-export const ImportDialog = {
-    props: ['store'],
-    emits: ['close'],
-    setup(props, { emit }) {
-        const username = ref('');
-        const password = ref('');
-        const error = ref('');
-        const loading = ref(false);
-
-        async function doImport() {
-            error.value = '';
-            loading.value = true;
-            try {
-                const creds = { username: username.value, password: password.value };
-                const text = await fetchAstLog(creds);
-                const rawTree = parseAstLog(text);
-                props.store.scoreModel = buildModel(rawTree);
-                props.store.credentials = creds;
-                emit('close');
-            } catch (e) {
-                error.value = e.message;
-            } finally {
-                loading.value = false;
-            }
-        }
-
-        function onKey(e) {
-            if (e.key === 'Escape') emit('close');
-            if (e.key === 'Enter') doImport();
-        }
-
-        return () => h('div', null, [
-            h('div', { class: 'se-overlay', onClick: () => emit('close') }),
-            h('div', { class: 'se-import-dialog', onKeydown: onKey, tabindex: -1 }, [
-                h('h3', null, 'Import from server'),
-                h('label', null, 'Username'),
-                h('input', {
-                    type: 'text',
-                    value: username.value,
-                    onInput: e => { username.value = e.target.value; },
-                    autocomplete: 'username',
-                }),
-                h('label', null, 'Password'),
-                h('input', {
-                    type: 'password',
-                    value: password.value,
-                    onInput: e => { password.value = e.target.value; },
-                    autocomplete: 'current-password',
-                }),
-                error.value ? h('div', { class: 'se-error' }, error.value) : null,
-                h('div', { class: 'se-dialog-buttons' }, [
-                    h('button', { class: 'se-btn', onClick: () => emit('close') }, 'Cancel'),
-                    h('button', {
-                        class: 'se-btn se-btn-primary',
-                        onClick: doImport,
-                        disabled: loading.value,
-                    }, loading.value ? 'Loading…' : 'Import'),
-                ]),
-            ]),
-        ]);
-    },
-};

static/components/ObjectExtended.js

@@ -1,8 +1,5 @@
 import { h } from 'vue';
 
-// Extended property view rendered as a definition list.
-// `fields`: array of { key, value, editable?, type? }
-// `onChange`: called with { key, value } when field changes.
 export const ObjectExtended = {
     props: ['fields', 'onChange'],
     setup(props) {

static/components/ObjectShort.js

@@ -1,16 +1,22 @@
 import { h } from 'vue';
 
-// One-line summary row with a drill-down chevron.
 export const ObjectShort = {
-    props: ['label', 'typeTag', 'focused', 'hasChildren'],
-    emits: ['focus', 'drillDown'],
+    props: ['label', 'typeTag', 'focused', 'hasChildren', 'readOnly', 'deletable'],
+    emits: ['focus', 'drillDown', 'delete'],
     setup(props, { emit }) {
         return () => h('li', {
-            class: ['se-object-item', props.focused ? 'focused' : null],
+            class: ['se-object-item', props.focused ? 'focused' : null, props.readOnly ? 'read-only' : null],
             onClick: () => emit('focus'),
         }, [
             props.typeTag ? h('span', { class: 'se-object-type' }, props.typeTag) : null,
             h('span', { class: 'se-object-label' }, props.label),
+            props.deletable
+                ? h('button', {
+                    class: 'se-btn-delete',
+                    title: 'Delete',
+                    onClick: e => { e.stopPropagation(); emit('delete'); },
+                  }, '×')
+                : null,
             props.hasChildren
                 ? h('button', {
                     class: 'se-chevron',

static/components/PaneCP.js

@@ -1,43 +1,15 @@
-import { h, ref, watch } from 'vue';
-import { fetchScoreText, putScoreText, fetchAudioWidget, URLS } from '../api.js';
+import { h, ref, watch, onMounted } from 'vue';
+import { fetchAstLog, fetchScoreText, putScoreText, fetchAudioWidget, URLS } from '../api.js';
+import { parseAstLog, buildModel } from '../ast-parser.js';
 import { patchScore } from '../exporter.js';
+import { shortView } from '../node-views.js';
 import { StatusPoller } from './StatusPoller.js';
 
-// Short label + identifying meta for each node type.
-function shortView(node) {
-    if (!node) return { typeTag: '?', label: '?', meta: [] };
-    switch (node.type) {
-        case 'score':
-            return {
-                typeTag: 'score',
-                label: node.info?.title ?? '(untitled)',
-                meta: node.info?.composer ? [{ key: 'composer', value: node.info.composer }] : [],
-            };
-        case 'instrument':
-            return { typeTag: 'instrument', label: node.name, meta: [] };
-        case 'variation': {
-            const dep = node.dependsOn;
-            const label = dep == null ? '(root variation)'
-                : isNaN(Number(dep)) ? `ATTR: ${dep}`
-                : String(dep);
-            return { typeTag: 'variation', label, meta: [] };
-        }
-        case 'label_spec':
-            return { typeTag: 'label', label: node.label ?? '(no label)', meta: [] };
-        case 'bar':
-            return { typeTag: 'bar', label: node.id, meta: [] };
-        case 'voice':
-            return { typeTag: 'voice', label: node.name, meta: [] };
-        case 'offset':
-            return { typeTag: 'tick', label: String(node.tick ?? '?'), meta: [] };
-        default:
-            return { typeTag: node.type, label: node.type, meta: [] };
-    }
-}
-
 export const PaneCP = {
-    props: ['store', 'onImportClick', 'onFocusFO'],
+    props: ['store', 'importOnLoad', 'onFocusFO'],
     setup(props) {
+        const importing = ref(false);
+        const importError = ref('');
         const exporting = ref(false);
         const exportError = ref('');
         const audioWidgetHtml = ref('');
@@ -53,14 +25,33 @@ export const PaneCP = {
             },
         );
 
+        async function doImport() {
+            if (props.store.isDirty) return;
+            importError.value = '';
+            importing.value = true;
+            try {
+                const text = await fetchAstLog();
+                props.store.scoreModel = buildModel(parseAstLog(text));
+                props.store.resetEditState();
+            } catch (e) {
+                importError.value = e.message;
+            } finally {
+                importing.value = false;
+            }
+        }
+
         async function doExport() {
             exportError.value = '';
             exporting.value = true;
             try {
-                const raw = await fetchScoreText(props.store.credentials);
+                const raw = await fetchScoreText();
                 props.store.rawScoreText = raw;
-                const patched = patchScore(raw, props.store.scoreModel.instruments, props.store.scoreModel.bars, props.store.scoreModel.info);
-                await putScoreText(patched, props.store.credentials);
+                const model = props.store.scoreModel;
+                const { text: patched, log } = patchScore(
+                    raw, model.instruments, model.bars, model.info, model.articles ?? [],
+                );
+                props.store.exportLog = log;
+                await putScoreText(patched);
                 props.store.synthesisStatus = { frozen: false, currently_rendered_notes: 0, notes_in_total: 0 };
             } catch (e) {
                 exportError.value = e.message;
@@ -69,6 +60,8 @@ export const PaneCP = {
             }
         }
 
+        onMounted(() => { if (props.importOnLoad) doImport(); });
+
         return () => {
             const store = props.store;
             const model = store.scoreModel;
@@ -85,10 +78,10 @@ export const PaneCP = {
                 h('div', { class: 'se-cp-header' }, [
                     h('button', {
                         class: 'se-btn',
-                        disabled: store.isDirty,
+                        disabled: store.isDirty || importing.value,
                         title: store.isDirty ? 'Save or discard edits before re-importing' : 'Import from server',
-                        onClick: props.onImportClick,
-                    }, '→ Import'),
+                        onClick: doImport,
+                    }, importing.value ? 'Importing…' : '→ Import'),
                     h('span', { class: 'se-cp-title' },
                         model ? (model.info?.title ?? 'Untitled score') : 'No score loaded'),
                     model ? h('button', {
@@ -123,8 +116,23 @@ export const PaneCP = {
                     })
                 ) : null,
 
-                // Export error
+                // Import / export / synthesis errors
+                importError.value ? h('div', { class: 'se-error' }, importError.value) : null,
                 exportError.value ? h('div', { class: 'se-error' }, exportError.value) : null,
+                store.synthesisStatus?.frozen && store.synthesisStatus.errors
+                    ? h('div', { class: 'se-error' }, store.synthesisStatus.errors) : null,
+
+                // Export log (shown after export, cleared on next import)
+                store.exportLog?.length
+                    ? h('div', { class: 'se-export-log' },
+                        store.exportLog.map((entry, i) =>
+                            h('div', {
+                                key: i,
+                                class: entry.level === 'changed' ? 'se-export-changed' : 'se-export-info',
+                            }, entry.path ? `→ ${entry.path}` : entry.message)
+                        )
+                      )
+                    : null,
 
                 // Status poller (while running)
                 store.synthesisStatus && !store.synthesisStatus.frozen

static/components/PaneFO.js

@@ -3,18 +3,23 @@ import { ObjectExtended } from './ObjectExtended.js';
 import { EnvelopeEditor } from './EnvelopeEditor.js';
 import { ShapeEditor } from './ShapeEditor.js';
 import { LinkedInstrumentModal } from './LinkedInstrumentModal.js';
-import { stressorToString } from '../exporter.js';
+import { coerce, stressorToString } from '../util.js';
 
 const H4 = { style: 'margin:0 0 0.5rem' };
 
-function parseStressor(str) {
+function _unknownPropFields(node) {
+    return Object.entries(node.unknownProps ?? {})
+        .map(([key, value]) => ({ key, value: String(value), editable: false }));
+}
+
+function _parseStressor(str) {
     const groups = str.split(';').map(seg =>
         seg.split(',').map(n => parseInt(n, 10)).filter(n => !isNaN(n))
     ).filter(g => g.length > 0);
     return groups.length ? { type: 'stressor', groups } : null;
 }
 
-function scoreInfoFields(info) {
+function _scoreInfoFields(info) {
     return [
         { key: 'title',     value: info?.title     ?? '', editable: true },
         { key: 'composer',  value: info?.composer   ?? '', editable: true },
@@ -23,7 +28,7 @@ function scoreInfoFields(info) {
     ];
 }
 
-function instrFields(instr) {
+function _instrFields(instr) {
     return [
         { key: 'name',             value: instr.name,                    editable: false },
         { key: 'linked',           value: instr.isLinked,                editable: false, type: 'boolean' },
@@ -31,11 +36,11 @@ function instrFields(instr) {
     ];
 }
 
-function variationFields(v) {
+function _variationFields(v) {
     return [{ key: 'depends_on', value: v.dependsOn ?? '—', editable: true }];
 }
 
-function shapeSection(label, shape, onChange) {
+function _shapeSection(label, shape, onChange) {
     if (!shape) return null;
     return h('div', { style: 'margin-top:0.5rem' }, [
         h('strong', null, label),
@@ -53,15 +58,13 @@ export const PaneFO = {
             return fp.length ? fp[fp.length - 1] : null;
         }
 
-        // Intercepts the first edit to a linked instrument:
-        // shows embed-or-discard modal before committing. `info.undo`
-        // (forwarded from ShapeEditor/EnvelopeEditor) reverts the mutation on discard.
+        // Guard: first edit to a linked instrument triggers embed-or-discard before committing.
         function makeChangeHandler(instr) {
             return (info) => {
-                if (instr.isLinked && !instr.isDirty) {
+                if (instr.isLinked && !instr._modified) {
                     pendingEdit.value = { instr, undo: info?.undo };
                 } else {
-                    instr.isDirty = true;
+                    instr._modified = true;
                     props.store.markDirty();
                 }
             };
@@ -70,7 +73,7 @@ export const PaneFO = {
         function embedInstrument(instr) {
             instr.name = instr.name.split('/').pop();
             instr.isLinked = false;
-            instr.isDirty = true;
+            instr._modified = true;
             pendingEdit.value = null;
             props.store.markDirty();
         }
@@ -96,7 +99,7 @@ export const PaneFO = {
                 return h('div', { class: 'se-fo-pane' }, [
                     h('h4', H4, 'Score'),
                     h(ObjectExtended, {
-                        fields: scoreInfoFields(model.info),
+                        fields: _scoreInfoFields(model.info),
                         onChange: ({ key, value }) => {
                             if (!model.info) model.info = {};
                             model.info[key] = value;
@@ -109,7 +112,7 @@ export const PaneFO = {
             if (node.type === 'instrument') {
                 children.push(
                     h('h4', H4, `Instrument: ${node.name}`),
-                    h(ObjectExtended, { fields: instrFields(node), onChange: null }),
+                    h(ObjectExtended, { fields: _instrFields(node), onChange: null }),
                 );
             } else if (node.type === 'variation') {
                 const instr = props.store.scoreModel.instruments.find(
@@ -120,7 +123,7 @@ export const PaneFO = {
 
                 children.push(
                     h('h4', H4, 'Variation'),
-                    h(ObjectExtended, { fields: variationFields(node), onChange: ({ key, value }) => {
+                    h(ObjectExtended, { fields: _variationFields(node), onChange: ({ key, value }) => {
                         if (key === 'depends_on') {
                             const old = node.dependsOn;
                             node.dependsOn = value;
@@ -148,60 +151,152 @@ export const PaneFO = {
                         ? h(EnvelopeEditor, { basicProperties: node.basicProperties, onChange })
                         : null,
                 );
+            } else if (node.type === 'article') {
+                const markDirty = () => { props.store.markDirty(); };
+                const rowStyle = 'display:flex;gap:0.4rem;align-items:center;padding:0.2rem 0';
+                children.push(
+                    h('h4', H4, `Article: ${node.name}`),
+                    h('ul', { class: 'se-article-props', style: 'list-style:none;padding:0;margin:0' }, [
+                        ...node.properties.map((p, idx) => {
+                            const isOverwrite = p.scope === 'overwrites';
+                            const flip = () => { p.scope = isOverwrite ? 'defaults' : 'overwrites'; markDirty(); };
+                            const onKeyInput = (e) => { p.name  = e.target.value;                    markDirty(); };
+                            const onValInput = (e) => { p.value = coerce(e.target.value);            markDirty(); };
+                            const onRemove   = ()   => { node.properties.splice(idx, 1);             markDirty(); };
+                            return h('li', { key: idx, style: rowStyle }, [
+                                h('input', {
+                                    class: 'se-prop-key',
+                                    value: p.name,
+                                    style: 'flex:1;min-width:6em',
+                                    onInput: onKeyInput,
+                                }),
+                                h('span', null, '='),
+                                h('input', {
+                                    class: 'se-prop-val',
+                                    value: String(p.value),
+                                    style: 'flex:1;min-width:6em',
+                                    onInput: onValInput,
+                                }),
+                                h('div', { class: 'form-check form-switch mb-0' }, [
+                                    h('input', {
+                                        class: 'form-check-input mt-0',
+                                        type: 'checkbox',
+                                        role: 'switch',
+                                        id: `prop-scope-${idx}`,
+                                        checked: isOverwrite,
+                                        onChange: flip,
+                                    }),
+                                    h('label', {
+                                        class: 'form-check-label',
+                                        for: `prop-scope-${idx}`,
+                                    }, isOverwrite ? 'overwrite' : 'default'),
+                                ]),
+                                h('button', {
+                                    class: 'se-btn-remove',
+                                    title: 'Remove property',
+                                    onClick: onRemove,
+                                }, '×'),
+                            ]);
+                        }),
+                        h('li', { key: '__add', style: rowStyle },
+                            h('button', {
+                                class: 'se-btn',
+                                onClick: () => {
+                                    node.properties.push({ name: '', value: '', scope: 'defaults' });
+                                    markDirty();
+                                },
+                            }, '+ add property')),
+                    ]),
+                );
             } else if (node.type === 'bar') {
-                const markBarDirty = () => { node.isDirty = true; props.store.markDirty(); };
+                const markBarDirty = () => { props.store.markDirty(); };
                 children.push(
                     h('h4', H4, `Bar: ${node.id}`),
                     h(ObjectExtended, {
                         fields: [
-                            { key: 'id',               value: node.id,                          editable: false },
+                            { key: 'id',               value: node.id,                          editable: node._isNew ?? false },
                             { key: 'beats_per_minute', value: node.tempoLevels ?? '',           editable: true, type: 'number' },
                             { key: 'stress_pattern',   value: stressorToString(node.stressor),  editable: true },
                         ],
                         onChange: ({ key, value }) => {
+                            if (key === 'id')              { node.id = value; markBarDirty(); return; }
                             if (key === 'beats_per_minute') node.tempoLevels = isNaN(value) ? null : value;
-                            if (key === 'stress_pattern')   node.stressor    = parseStressor(value);
+                            if (key === 'stress_pattern')   node.stressor    = _parseStressor(value);
                             markBarDirty();
                         },
                     }),
-                    shapeSection('Upper stress bound', node.upperStressBound, markBarDirty),
-                    shapeSection('Lower stress bound', node.lowerStressBound, markBarDirty),
-                    shapeSection('Tempo shape',        node.tempoShape,       markBarDirty),
+                    _shapeSection('Upper stress bound', node.upperStressBound, markBarDirty),
+                    _shapeSection('Lower stress bound', node.lowerStressBound, markBarDirty),
+                    _shapeSection('Tempo shape',        node.tempoShape,       markBarDirty),
                 );
             } else if (node.type === 'voice') {
                 children.push(
                     h('h4', H4, `Voice: ${node.name}`),
                     h(ObjectExtended, {
                         fields: [
-                            { key: 'articles', value: node.articles.join(', ') || '—', editable: false },
-                            { key: 'motifs',   value: node.motifs.join(', ')   || '—', editable: false },
+                            { key: 'articles', value: node.articles.map(a => a.name).join(', ') || '—', editable: false },
+                            { key: 'motifs',   value: node.motifs.map(m => m.label).join(', ') || '—', editable: false },
                             { key: 'offsets',  value: String(node.offsets.length),     editable: false },
                         ],
                         onChange: null,
                     }),
                 );
             } else if (node.type === 'offset') {
-                const noteStr    = n => `${n.pitch}${n.effLength != null ? ' ' + n.effLength : ''}`;
-                const clusterStr = c => c.notes.length
-                    ? c.notes.map(n => `${n.letter ?? ''}${n.shift != null ? n.shift : ''}${n.length != null ? ' ' + n.length : ''}`).join(', ')
-                    : `cluster[${c.index}]`;
-                const noteItem = (text, i) => h('li', { class: 'se-object-item', key: i },
-                    h('span', { class: 'se-object-label' }, text));
-
+                const snLabel = sn => `${sn.pitch}${sn.effLength != null ? ' /' + sn.effLength : ''}${sn.clauses.length ? ' ×' + sn.clauses.length : ''}`;
                 children.push(
                     h('h4', H4, `Tick: ${node.tick}`),
                     h(ObjectExtended, {
-                        fields: [{ key: 'tick', value: node.tick, editable: false }],
+                        fields: [
+                            { key: 'tick', value: node.tick, editable: false },
+                            { key: 'stem notes', value: node.stemNotes.map(snLabel).join(', ') || '—', editable: false },
+                            node.motifRefs?.length
+                                ? { key: 'motifRefs', value: node.motifRefs.map(m => m.chord ? `${m.label}(${m.chord})` : m.label).join(', '), editable: false }
+                                : null,
+                            ..._unknownPropFields(node),
+                        ].filter(Boolean),
                         onChange: null,
                     }),
-                    node.stemNotes.length ? h('div', { style: 'margin-top:0.5rem' }, [
-                        h('strong', null, 'Stem notes'),
-                        h('ul', { class: 'se-object-list' }, node.stemNotes.map((n, i) => noteItem(noteStr(n), i))),
-                    ]) : null,
-                    node.clusters.length ? h('div', { style: 'margin-top:0.5rem' }, [
-                        h('strong', null, 'Clusters'),
-                        h('ul', { class: 'se-object-list' }, node.clusters.map((c, i) => noteItem(clusterStr(c), i))),
-                    ]) : null,
+                );
+            } else if (node.type === 'motif') {
+                const pitchLabel = sn => (Number.isInteger(sn.pitch) ? `(ref${sn.pitch !== 0 ? sn.pitch : ''})` : String(sn.pitch))
+                    + (sn.clauses.length ? ' ×' + sn.clauses.length : '');
+                children.push(
+                    h('h4', H4, `Motif: ${node.label}`),
+                    h(ObjectExtended, {
+                        fields: [
+                            { key: 'label',      value: node.label,                                       editable: false },
+                            { key: 'static',     value: node.isStatic,                                    editable: false, type: 'boolean' },
+                            { key: 'stem notes', value: node.stemNotes.map(pitchLabel).join(', ') || '—', editable: false },
+                            ..._unknownPropFields(node),
+                        ],
+                        onChange: null,
+                    }),
+                );
+            } else if (node.type === 'stem_note') {
+                const markDirty = () => {
+                    props.store.markDirty();
+                };
+                children.push(
+                    h('h4', H4, `Stem note: ${node.pitch}`),
+                    h(ObjectExtended, {
+                        fields: [
+                            { key: 'pitch',      value: node.pitch,         editable: true },
+                            { key: 'length',     value: node.length ?? '',  editable: true },
+                            { key: 'weight',     value: node.weight != null ? String(node.weight) : '', editable: true, type: 'number' },
+                            { key: 'adj_stress', value: node.adjStress != null ? String(node.adjStress) : '', editable: true, type: 'number' },
+                            { key: 'chain',      value: node.chainText,     editable: true },
+                            { key: 'clauses',    value: String(node.clauses.length),                    editable: false },
+                            ..._unknownPropFields(node),
+                        ],
+                        onChange: ({ key, value }) => {
+                            if (key === 'pitch')      node.pitch     = value;
+                            if (key === 'length')     node.length    = value || null;
+                            if (key === 'weight')     node.weight    = value === '' ? null : Number(value);
+                            if (key === 'adj_stress') node.adjStress = value === '' ? null : Number(value);
+                            if (key === 'chain')      node.chainText = value;
+                            markDirty();
+                        },
+                    }),
                 );
             } else {
                 children.push(h('pre', { style: 'font-size:0.75rem;white-space:pre-wrap' },

static/components/PaneSubObjects.js

@@ -1,71 +1,147 @@
 import { h } from 'vue';
 import { ObjectShort } from './ObjectShort.js';
+import { getKindGroups } from '../subobject-kinds.js';
+
+function _barGroupKey(id) {
+    const m = id.match(/(\d+|\D+)$/);
+    return m ? id.slice(0, m.index) : id;
+}
+
+function _incrementId(id) {
+    const m = id.match(/(\d+)$/);
+    if (!m) return id + '1';
+    const num = parseInt(m[1], 10) + 1;
+    const padded = String(num).padStart(m[1].length, '0');
+    return id.slice(0, m.index) + padded;
+}
 
 export const PaneSubObjects = {
-    props: ['store', 'onFocusFO'],
+    props: ['store', 'kind', 'onFocusFO'],
     setup(props) {
         function focused() {
             const fp = props.store.focusPath;
             return fp.length ? fp[fp.length - 1] : props.store.scoreModel;
         }
 
-        function subItems(node) {
-            if (!node) return [];
-            if (node.type === 'score') {
-                const items = [];
-                if (node.info)
-                    items.push({ kind: 'info',       node: node.info,  label: node.info.title ?? '(no title)', hasChildren: false });
-                if (node.tuning)
-                    items.push({ kind: 'tuning',     node: node.tuning, label: `base ${node.tuning.base ?? '?'}`, hasChildren: false });
-                for (const a of (node.articles ?? []))
-                    items.push({ kind: 'article',    node: a,  label: a.name,  hasChildren: false });
-                for (const sv of (node.stageVoices ?? []))
-                    items.push({ kind: 'stage',      node: sv, label: sv.name, hasChildren: false });
-                for (const i of node.instruments)
-                    items.push({ kind: 'instrument', node: i,  label: i.name,  hasChildren: true });
-                for (const b of node.bars)
-                    items.push({ kind: 'bar',        node: b,  label: b.id,    hasChildren: Object.keys(b.voices).length > 0 });
-                return items;
+        function _spliceNode(arr, node) {
+            const idx = arr.indexOf(node);
+            if (idx !== -1) { arr.splice(idx, 1); props.store.markDirty(); }
+        }
+
+        function deleteItem(kind, node) {
+            const store = props.store;
+            const model = store.scoreModel;
+            if (!model) return;
+
+            if (kind === 'instrument') {
+                _spliceNode(model.instruments, node);
+            } else if (kind === 'articles') {
+                _spliceNode(model.articles, node);
+            } else if (kind === 'bar') {
+                _spliceNode(model.bars, node);
+            } else if (kind === 'variation') {
+                for (const instr of model.instruments) {
+                    const idx = instr.variations.indexOf(node);
+                    if (idx !== -1) { instr.variations.splice(idx, 1); instr._modified = true; store.markDirty(); return; }
+                    for (const v of instr.variations) {
+                        const sidx = v.subvariations.indexOf(node);
+                        if (sidx !== -1) { v.subvariations.splice(sidx, 1); instr._modified = true; store.markDirty(); return; }
+                    }
+                }
+            } else if (kind === 'label_spec') {
+                for (const instr of model.instruments) {
+                    for (const v of instr.variations) {
+                        const idx = v.labelSpecs.indexOf(node);
+                        if (idx !== -1) { v.labelSpecs.splice(idx, 1); instr._modified = true; store.markDirty(); return; }
+                        for (const sv of v.subvariations) {
+                            const idx2 = sv.labelSpecs.indexOf(node);
+                            if (idx2 !== -1) { sv.labelSpecs.splice(idx2, 1); instr._modified = true; store.markDirty(); return; }
+                        }
+                    }
+                }
             }
-            if (node.type === 'instrument') {
-                return node.variations.map((v, idx) => ({
-                    kind: 'variation',
-                    node: v,
-                    label: `variation ${idx + 1}${v.dependsOn ? ` (${v.dependsOn})` : ''}`,
-                    hasChildren: true,
-                }));
+        }
+
+        function addBar(afterId) {
+            const store = props.store;
+            const model = store.scoreModel;
+            if (!model) return;
+            let newId;
+            if (afterId) {
+                newId = _incrementId(afterId);
+            } else {
+                const liveBars = model.bars ?? [];
+                newId = liveBars.length ? _incrementId(liveBars[liveBars.length - 1].id) : 'bar001';
             }
-            if (node.type === 'variation') {
-                return [
-                    ...node.labelSpecs.map(ls => ({
-                        kind: 'label_spec', node: ls, label: ls.label ?? '(no label)', hasChildren: false,
-                    })),
-                    ...node.subvariations.map((sv, idx) => {
-                        const dep = sv.dependsOn;
-                        const label = dep == null ? `subvariation ${idx + 1}`
-                            : isNaN(Number(dep)) ? `ATTR: ${dep}`
-                            : String(dep);
-                        return { kind: 'variation', node: sv, label, hasChildren: true };
-                    }),
-                ];
-            }
-            if (node.type === 'bar') {
-                return Object.entries(node.voices).map(([name, v]) => ({
-                    kind: 'voice', node: v, label: name, hasChildren: v.offsets.length > 0,
-                }));
-            }
-            if (node.type === 'voice') {
-                return node.offsets.map((o, idx) => ({
-                    kind: 'offset', node: o, label: `tick ${o.tick ?? idx}`, hasChildren: false,
-                }));
-            }
-            return [];
+            const newBar = {
+                type: 'bar', id: newId, _isNew: true,
+                stressor: null, tempoLevels: null,
+                upperStressBound: null, lowerStressBound: null, tempoShape: null,
+                voices: {},
+            };
+            model.bars.push(newBar);
+            store.markDirty();
+            store.pushFocus(newBar);
+            props.onFocusFO?.();
         }
 
         return () => {
             const node = focused();
-            const items = subItems(node);
-            if (!items.length) return h('div', null, h('em', null, 'No sub-objects'));
+            const groups = getKindGroups(node);
+            const group = props.kind
+                ? groups.find(g => g.kind === props.kind)
+                : groups[0];
+            const items = group?.items ?? [];
+
+            if (!items.length && props.kind !== 'bar') return h('div', null, h('em', null, 'No sub-objects'));
+
+            if (props.kind === 'bar') {
+                const barGroups = [];
+                const seen = new Map();
+                for (const item of items) {
+                    const key = _barGroupKey(item.label);
+                    if (!seen.has(key)) {
+                        const g = { key, items: [] };
+                        barGroups.push(g);
+                        seen.set(key, g);
+                    }
+                    seen.get(key).items.push(item);
+                }
+
+                const groupEls = barGroups.map(g => {
+                    const lastId = g.items[g.items.length - 1].label;
+                    return h('div', { key: g.key, class: 'se-bar-group' }, [
+                        ...g.items.map((item, idx) =>
+                            h('span', {
+                                key: idx,
+                                class: ['se-bar-chip', props.store.focusPath.includes(item.node) ? 'focused' : null],
+                            }, [
+                                h('span', {
+                                    class: 'se-bar-chip-label',
+                                    onClick: () => { props.store.pushFocus(item.node); props.onFocusFO?.(); },
+                                }, item.label),
+                                h('button', {
+                                    class: 'se-bar-chip-delete',
+                                    title: 'Delete bar',
+                                    onClick: e => { e.stopPropagation(); deleteItem('bar', item.node); },
+                                }, '×'),
+                            ])
+                        ),
+                        h('button', {
+                            class: 'se-bar-add',
+                            title: `Add bar after ${lastId}`,
+                            onClick: () => addBar(lastId),
+                        }, '+ add'),
+                    ]);
+                });
+
+                return h('div', { class: 'se-bar-groups' }, [
+                    ...groupEls,
+                    h('div', { class: 'se-bar-group' },
+                        h('button', { class: 'se-bar-add', onClick: () => addBar(null) }, '+ add bar')
+                    ),
+                ]);
+            }
 
             return h('div', null,
                 h('ul', { class: 'se-object-list' }, items.map((item, idx) =>
@@ -75,8 +151,11 @@ export const PaneSubObjects = {
                         typeTag: item.kind,
                         focused: props.store.focusPath.includes(item.node),
                         hasChildren: item.hasChildren,
-                        onFocus:    () => { props.store.pushFocus(item.node); props.onFocusFO?.(); },
+                        readOnly: item.readOnly ?? false,
+                        deletable: item.deletable ?? false,
+                        onFocus:     () => { props.store.pushFocus(item.node); props.onFocusFO?.(); },
                         onDrillDown: () => { props.store.pushFocus(item.node); props.onFocusFO?.(); },
+                        onDelete: item.deletable ? () => deleteItem(item.kind, item.node) : undefined,
                     })
                 ))
             );

static/components/StatusPoller.js

@@ -8,7 +8,7 @@ export const StatusPoller = {
 
         async function poll() {
             try {
-                const status = await fetchStatus(props.store.credentials);
+                const status = await fetchStatus();
                 props.store.synthesisStatus = status;
                 if (status.frozen) return;
             } catch (_) {

static/exporter.js

@@ -1,12 +1,10 @@
-// RFC-compliant YAML serializer for Sompyler instrument blocks.
-// Operates on the model produced by ast-parser.js buildModel().
+import { stressorToString } from './util.js';
 
-// ── Shape ──────────────────────────────────────────────────────────────────
 // RFC §1.3.4.5: SHAPE = [PREFIX (":" / ";")] Node 1*(";" Node)
 //               Node  = x "," y ["*" z] ["!"]
 // PREFIX+colon is the duration/resolution; optional START+semicolon follows.
 
-function serializeShape(shape) {
+function _serializeShape(shape) {
     if (!shape) return null;
     const nodes = shape.coords.map(c => {
         let s = `${c.x},${c.y}`;
@@ -20,75 +18,66 @@ function serializeShape(shape) {
     return prefix + nodes;
 }
 
-// ── FM / AM modulation ─────────────────────────────────────────────────────
 // RFC §3.2.1.1.6-7: FM = FREQUENCY ["f"/"F"] ["@" OSC] ["[" SHAPE "]"] ";" MOD ":" BASE
 
-function serializeModulation(m) {
-    let s = String(m.frequency ?? '');
-    if (m.oscillator) s += `@${m.oscillator}`;
-    if (m.shape) s += `[${serializeShape(m.shape)}]`;
-    s += `;${m.mod_share ?? ''}:${m.base_share ?? ''}`;
-    if (m.init_phase != null) s += m.init_phase >= 0 ? `+${m.init_phase}` : String(m.init_phase);
+function _serializeModulation(modulation) {
+    let s = String(modulation.frequency ?? '');
+    if (modulation.oscillator) s += `@${modulation.oscillator}`;
+    if (modulation.shape) s += `[${_serializeShape(modulation.shape)}]`;
+    s += `;${modulation.mod_share ?? ''}:${modulation.base_share ?? ''}`;
+    if (modulation.init_phase != null) s += modulation.init_phase >= 0 ? `+${modulation.init_phase}` : String(modulation.init_phase);
     return s;
 }
 
-// ── Basic properties ───────────────────────────────────────────────────────
 // RFC §3.2.1.1: O, A, S, R, FM go directly in the variation MAPPING.
-// Returns array of YAML lines at 0 indent.
 
-function basicPropLines(bp) {
+function _basicPropLines(bp) {
     if (!bp) return [];
-    const lines = [];
-    if (bp.oscillator) lines.push(`O: ${bp.oscillator}`);
-    const a = serializeShape(bp.A);
-    if (a) lines.push(`A: "${a}"`);
-    const s = serializeShape(bp.S);
-    if (s) lines.push(`S: "${s}"`);
-    const r = serializeShape(bp.R);
-    if (r) lines.push(`R: "${r}"`);
-    for (const fm of (bp.fmModulations ?? [])) lines.push(`FM: "${serializeModulation(fm)}"`);
-    for (const am of (bp.amModulations ?? [])) lines.push(`AM: "${serializeModulation(am)}"`);
-    return lines;
+    const a = _serializeShape(bp.A), s = _serializeShape(bp.S), r = _serializeShape(bp.R);
+    return [
+        bp.oscillator ? `O: ${bp.oscillator}` : null,
+        a ? `A: "${a}"` : null,
+        s ? `S: "${s}"` : null,
+        r ? `R: "${r}"` : null,
+        ...(bp.fmModulations ?? []).map(fm => `FM: "${_serializeModulation(fm)}"`),
+        ...(bp.amModulations ?? []).map(am => `AM: "${_serializeModulation(am)}"`),
+    ].filter(Boolean);
 }
 
-// ── Labelled property groups ───────────────────────────────────────────────
 // RFC §3.2.1.2: label name (3+ lowercase chars) is the MAPPING KEY directly.
-// Returns array of YAML lines at 0 indent.
 
-function labelSpecLines(ls) {
-    const inner = basicPropLines(ls.basicProperties);
+function _labelSpecLines(ls) {
+    const inner = _basicPropLines(ls.basicProperties);
     if (!inner.length) return [`${ls.label}:`];
     return [`${ls.label}:`, ...inner.map(l => `  ${l}`)];
 }
 
-// ── Variation ─────────────────────────────────────────────────────────────
-// Returns YAML lines for one variation MAPPING (no leading "- ").
 // RFC §3.2.1.3: VOLUMES, TIMBRE are variation properties, not instrument-level.
 
-function variationLines(v) {
-    const lines = [];
-    if (v.dependsOn) lines.push(`ATTR: ${v.dependsOn}`);
-    lines.push(...basicPropLines(v.basicProperties));
-    for (const ls of (v.labelSpecs ?? [])) lines.push(...labelSpecLines(ls));
-    if (v.spread?.length) lines.push(`SPREAD: [${v.spread.join(', ')}]`);
-    if (v.railsbackCurve) { const rc = serializeShape(v.railsbackCurve); if (rc) lines.push(`RAILSBACK_CURVE: "${rc}"`); }
-    const vol = serializeShape(v.volumes);
-    if (vol) lines.push(`VOLUMES: "${vol}"`);
-    const timbre = serializeShape(v.timbre);
-    if (timbre) lines.push(`TIMBRE: "${timbre}"`);
-    for (const fm of (v.fmModulations ?? [])) lines.push(`FM: "${serializeModulation(fm)}"`);
-    for (const am of (v.amModulations ?? [])) lines.push(`AM: "${serializeModulation(am)}"`);
-    for (const sv of (v.subvariations ?? [])) lines.push(...variationLines(sv));
-    return lines;
+function _variationLines(variation) {
+    const rc = _serializeShape(variation.railsbackCurve);
+    const vol = _serializeShape(variation.volumes);
+    const timbre = _serializeShape(variation.timbre);
+    return [
+        variation.dependsOn ? `ATTR: ${variation.dependsOn}` : null,
+        ..._basicPropLines(variation.basicProperties),
+        ...(variation.labelSpecs ?? []).flatMap(_labelSpecLines),
+        variation.spread?.length ? `SPREAD: [${variation.spread.join(', ')}]` : null,
+        rc ? `RAILSBACK_CURVE: "${rc}"` : null,
+        vol ? `VOLUMES: "${vol}"` : null,
+        timbre ? `TIMBRE: "${timbre}"` : null,
+        ...(variation.fmModulations ?? []).map(fm => `FM: "${_serializeModulation(fm)}"`),
+        ...(variation.amModulations ?? []).map(am => `AM: "${_serializeModulation(am)}"`),
+        ...(variation.subvariations ?? []).flatMap(_variationLines),
+    ].filter(Boolean);
 }
 
-// ── Instrument character block ─────────────────────────────────────────────
 // VOLUMES, TIMBRE, FM are variation properties (RFC §3.2.1.3). The AST parser
 // stores them on the instrument because they appear at depth 01 (root variation
 // is implicit when no character: wrapper exists). Promote them into a synthetic
 // root variation here so the export structure is RFC-correct.
 
-function instrCharacterLines(instr) {
+function _instrCharacterLines(instr) {
     const variations = instr.variations ?? [];
     const hasRootProps = instr.basicProperties || instr.volumes || instr.timbre ||
                          (instr.fmModulations ?? []).length > 0 ||
@@ -111,50 +100,95 @@ function instrCharacterLines(instr) {
     ];
 
     if (allVariations.length <= 1) {
-        const vLines = allVariations.length ? variationLines(allVariations[0]) : [];
+        const vLines = allVariations.length ? _variationLines(allVariations[0]) : [];
         return vLines.map(l => `    ${l}`);
     }
 
     // Multiple variations — RFC MAYBE_LIST<VARIATION> as YAML sequence.
-    const result = [];
-    for (const v of allVariations) {
-        const vLines = variationLines(v);
-        if (!vLines.length) continue;
-        result.push(`    - ${vLines[0]}`);
-        for (const l of vLines.slice(1)) result.push(`      ${l}`);
-    }
-    return result;
+    return allVariations.flatMap(v => {
+        const vLines = _variationLines(v);
+        if (!vLines.length) return [];
+        return [`    - ${vLines[0]}`, ...vLines.slice(1).map(l => `      ${l}`)];
+    });
+}
+
+// RFC §4.4.1: DATE = YYYY-MM-DD HH:MM:SS
+// notChangedSince from AST log is a float epoch; score YAML must have ISO date.
+
+function _epochToISO(val) {
+    if (!val) return null;
+    if (typeof val === 'string') return val;
+    return new Date(val * 1000).toISOString().slice(0, 19).replace('T', ' ');
+}
+
+function _nowISO() {
+    return new Date().toISOString().slice(0, 19).replace('T', ' ');
 }
 
-// ── Instrument ────────────────────────────────────────────────────────────
 // RFC §4.4: embedded instrument key is "instrument NAME:" not "instrument: 'NAME'"
 
 export function exportInstrument(instr) {
     const lines = [`instrument ${instr.name}:`];
-    if (instr.notChangedSince) lines.push(`  NOT_CHANGED_SINCE: ${instr.notChangedSince}`);
+    lines.push(`  NOT_CHANGED_SINCE: ${_nowISO()}`);
     lines.push(`  character:`);
-    lines.push(...instrCharacterLines(instr));
+    lines.push(..._instrCharacterLines(instr));
+    return lines.join('\n');
+}
+
+// RFC §4.3: articles: MAPPING { LABEL: { ATTR: VALUE ... } ... }
+
+function _serializeArticleValue(v) {
+    if (typeof v === 'boolean') return String(v);
+    if (typeof v === 'number') return String(v);
+    const s = String(v);
+    return /[:#\[\]{}&*!,|>'"%@`]/.test(s) ? JSON.stringify(s) : s;
+}
+
+function _buildArticlesBlock(articles) {
+    const body = articles.flatMap(art => {
+        const defaults = (art.properties ?? []).filter(p => p.scope !== 'overwrites' && p.name);
+        const overwrites = (art.properties ?? []).filter(p => p.scope === 'overwrites' && p.name);
+        if (!defaults.length && !overwrites.length) return [];
+        const lines = [`  ${art.name}:`];
+        defaults.forEach(p => lines.push(`    ${p.name}: ${_serializeArticleValue(p.value)}`));
+        if (overwrites.length) {
+            lines.push(`    -important:`);
+            overwrites.forEach(p => lines.push(`      - ${p.name}`));
+        }
+        return lines;
+    });
+    return body.length ? ['articles:', ...body].join('\n') : null;
+}
+
+function _patchArticles(text, articles) {
+    const newBlock = _buildArticlesBlock(articles);
+    const lines = text.split('\n');
+    const artIdx = lines.findIndex(l => /^articles\s*:/.test(l));
+    if (artIdx !== -1) {
+        let end = artIdx + 1;
+        while (end < lines.length && (lines[end] === '' || lines[end].startsWith(' ') || lines[end].startsWith('\t'))) end++;
+        if (newBlock) lines.splice(artIdx, end - artIdx, newBlock);
+        else lines.splice(artIdx, end - artIdx);
+    } else if (newBlock) {
+        const instrIdx = lines.findIndex(l => /^instrument\s/.test(l));
+        const insertAt = instrIdx !== -1 ? instrIdx : lines.length;
+        lines.splice(insertAt, 0, newBlock, '');
+    }
     return lines.join('\n');
 }
 
-// ── Score patch ────────────────────────────────────────────────────────────
-// Replace dirty instrument blocks and dirty bar _meta blocks.
 // Voice note content in bar documents is left verbatim.
 
 const META_KEYS = ['title', 'composer', 'source', 'encrypter'];
 
-function patchMetadata(text, info) {
+function _patchMetadata(text, info) {
     if (!info) return text;
     const lines = text.split('\n');
     const replaced = new Set();
 
     const out = lines.map(line => {
-        for (const key of META_KEYS) {
-            if (line.startsWith(key + ':') && info[key] != null && info[key] !== '') {
-                replaced.add(key);
-                return `${key}: ${info[key]}`;
-            }
-        }
+        const key = META_KEYS.find(k => line.startsWith(k + ':') && info[k] != null && info[k] !== '');
+        if (key) { replaced.add(key); return `${key}: ${info[key]}`; }
         return line;
     });
 
@@ -166,14 +200,14 @@ function patchMetadata(text, info) {
     return out.join('\n');
 }
 
-function patchInstrumentHeader(text, instruments) {
+function _patchInstrumentHeader(text, instruments) {
     const lines = text.split('\n');
     const result = [];
-    const instrMap = {};
-    for (const instr of instruments) {
-        instrMap[instr.name] = instr;
-        if (instr.name.includes('/')) instrMap[instr.name.split('/').pop()] = instr;
-    }
+    const instrMap = Object.fromEntries(instruments.flatMap(instr => {
+        const entries = [[instr.name, instr]];
+        if (instr.name.includes('/')) entries.push([instr.name.split('/').pop(), instr]);
+        return entries;
+    }));
 
     let i = 0;
     while (i < lines.length) {
@@ -182,14 +216,25 @@ function patchInstrumentHeader(text, instruments) {
         if (m) {
             const rawName = m[1].replace(/^'|'$/g, '');
             const instr = instrMap[rawName];
-            if (instr && instr.isDirty) {
+            if (!instr) {
+                // not in model → deleted; skip block
+                i++;
+                while (i < lines.length && (lines[i].startsWith(' ') || lines[i] === '')) i++;
+            } else if (instr.isLinked && !instr._modified) {
+                result.push(line);
+                i++;
+                while (i < lines.length && (lines[i].startsWith(' ') || lines[i] === '')) {
+                    if (/^\s+NOT_CHANGED_SINCE\s*:/.test(lines[i]))
+                        result.push(`  NOT_CHANGED_SINCE: ${_epochToISO(instr.notChangedSince)}`);
+                    else
+                        result.push(lines[i]);
+                    i++;
+                }
+            } else {
                 i++;
                 while (i < lines.length && (lines[i].startsWith(' ') || lines[i] === '')) i++;
                 result.push(exportInstrument(instr));
                 result.push('');
-            } else {
-                result.push(line);
-                i++;
             }
         } else {
             result.push(line);
@@ -200,22 +245,78 @@ function patchInstrumentHeader(text, instruments) {
     return result.join('\n');
 }
 
-export function stressorToString(s) {
-    if (!s?.groups?.length) return '';
-    return s.groups.map(g => g.join(',')).join(';');
+
+// Remove stage voice entries whose referenced instrument is no longer in the model.
+// String form: `  voicename: LEFT|RIGHT DIST [Instrument]` — 3rd token is instrument.
+// Mapping form: `  voicename:\n    instrument: Name` — look for `instrument:` child.
+// When no explicit instrument is present, the voice name is the implicit instrument name.
+
+function _patchStageSection(text, instruments) {
+    const instrNames = new Set(instruments.flatMap(i => {
+        const names = [i.name];
+        if (i.name.includes('/')) names.push(i.name.split('/').pop());
+        return names;
+    }));
+    const lines = text.split('\n');
+    const stageIdx = lines.findIndex(l => /^stage\s*:/.test(l));
+    if (stageIdx === -1) return text;
+
+    let stageEnd = lines.length;
+    for (let j = stageIdx + 1; j < lines.length; j++) {
+        if (lines[j] !== '' && !/^\s/.test(lines[j])) { stageEnd = j; break; }
+    }
+
+    const stageLines = lines.slice(stageIdx + 1, stageEnd);
+    const firstIndented = stageLines.find(l => l !== '' && /^\s/.test(l));
+    if (!firstIndented) return text;
+    const voiceIndentLen = firstIndented.match(/^(\s+)/)[1].length;
+
+    // Group stageLines into per-voice entries
+    const entries = [];
+    let cur = null;
+    for (const line of stageLines) {
+        if (line === '') { if (cur) cur.lines.push(line); continue; }
+        const indentLen = (line.match(/^(\s+)/) ?? ['', ''])[1].length;
+        if (indentLen === voiceIndentLen) {
+            if (cur) entries.push(cur);
+            const m = line.match(/^\s+(\w[\w./]*)\s*:(.*)/);
+            cur = m ? { lines: [line], name: m[1], rest: m[2].trim() } : { lines: [line], name: null };
+        } else if (cur) {
+            cur.lines.push(line);
+        }
+    }
+    if (cur) entries.push(cur);
+
+    const keptLines = [];
+    for (const entry of entries) {
+        if (!entry.name || entry.name === '_space') { keptLines.push(...entry.lines); continue; }
+        let instrRef = null;
+        if (entry.rest) {
+            const parts = entry.rest.split(/\s+/);
+            if (parts.length >= 3) instrRef = parts[2];
+        } else {
+            for (const l of entry.lines.slice(1)) {
+                const im = l.match(/^\s+instrument\s*:\s*(\S+)/);
+                if (im) { instrRef = im[1]; break; }
+            }
+        }
+        if (instrNames.has(instrRef ?? entry.name)) keptLines.push(...entry.lines);
+    }
+
+    return [...lines.slice(0, stageIdx + 1), ...keptLines, ...lines.slice(stageEnd)].join('\n');
 }
 
-function patchBarMeta(doc, bar) {
+function _patchBarMeta(doc, bar) {
     const props = [];
     const sp = stressorToString(bar.stressor);
     if (sp) props.push(`  stress_pattern: ${sp}`);
     if (bar.tempoLevels != null)
         props.push(`  beats_per_minute: ${bar.tempoLevels}`);
-    const ub = serializeShape(bar.upperStressBound);
+    const ub = _serializeShape(bar.upperStressBound);
     if (ub) props.push(`  upper_stress_bound: ${ub}`);
-    const lb = serializeShape(bar.lowerStressBound);
+    const lb = _serializeShape(bar.lowerStressBound);
     if (lb) props.push(`  lower_stress_bound: ${lb}`);
-    if (bar.tempoShape) { const ts = serializeShape(bar.tempoShape); if (ts) props.push(`  tempo_shape: "${ts}"`); }
+    if (bar.tempoShape) { const ts = _serializeShape(bar.tempoShape); if (ts) props.push(`  tempo_shape: "${ts}"`); }
 
     const lines = doc.split('\n');
     const out = [];
@@ -242,24 +343,54 @@ function patchBarMeta(doc, bar) {
     return out.join('\n');
 }
 
-export function patchScore(rawScoreText, instruments, bars = [], info = null) {
+function _buildNewBarDoc(bar) {
+    const lines = [`_id: ${bar.id}`, '_meta:'];
+    const sp = stressorToString(bar.stressor);
+    if (sp) lines.push(`  stress_pattern: ${sp}`);
+    if (bar.tempoLevels != null) lines.push(`  beats_per_minute: ${bar.tempoLevels}`);
+    return lines.join('\n');
+}
+
+export function patchScore(rawScoreText, instruments, bars = [], info = null, articles = []) {
+    const log = [];
     const SEP = '\n---\n';
     const [header, ...barDocs] = rawScoreText.split(SEP);
 
-    const patchedHeader = patchInstrumentHeader(patchMetadata(header, info), instruments);
+    let patchedHeader = _patchMetadata(header, info);
 
-    if (!barDocs.length) return patchedHeader;
+    if (articles.length) {
+        patchedHeader = _patchArticles(patchedHeader, articles);
+        articles.forEach(a => log.push({ level: 'changed', path: `articles / ${a.name}` }));
+    }
 
-    const barMap = {};
-    for (const bar of bars) barMap[bar.id] = bar;
-
-    const patchedBarDocs = barDocs.map(doc => {
-        const m = doc.match(/^_id:\s*(\S+)/m);
-        if (!m) return doc;
-        const bar = barMap[m[1]];
-        if (!bar?.isDirty) return doc;
-        return patchBarMeta(doc, bar);
+    patchedHeader = _patchInstrumentHeader(patchedHeader, instruments);
+    patchedHeader = _patchStageSection(patchedHeader, instruments);
+    instruments.forEach(i => {
+        if (!(i.isLinked && !i._modified)) log.push({ level: 'changed', path: `instrument / ${i.name}` });
     });
 
-    return [patchedHeader, ...patchedBarDocs].join(SEP);
+    const barMap = Object.fromEntries(bars.map(b => [b.id, b]));
+    const newBars = bars.filter(b => b._isNew);
+
+    if (!barDocs.length) {
+        newBars.forEach(b => log.push({ level: 'changed', path: `bar / ${b.id}` }));
+        return { text: [patchedHeader, ...newBars.map(_buildNewBarDoc)].join(SEP), log };
+    }
+
+    const patchedBarDocs = [];
+    barDocs.forEach(doc => {
+        const m = doc.match(/^_id:\s*(\S+)/m);
+        if (!m) { patchedBarDocs.push(doc); return; }
+        const bar = barMap[m[1]];
+        if (!bar) return; // not in model → deleted
+        log.push({ level: 'changed', path: `bar / ${bar.id}` });
+        patchedBarDocs.push(_patchBarMeta(doc, bar));
+    });
+
+    newBars.forEach(bar => {
+        patchedBarDocs.push(_buildNewBarDoc(bar));
+        log.push({ level: 'changed', path: `bar / ${bar.id}` });
+    });
+
+    return { text: [patchedHeader, ...patchedBarDocs].join(SEP), log };
 }

static/node-views.js

@@ -0,0 +1,38 @@
+export function shortView(node) {
+    if (!node) return { typeTag: '?', label: '?', meta: [] };
+    switch (node.type) {
+        case 'score':
+            return {
+                typeTag: 'score',
+                label: node.info?.title ?? '(untitled)',
+                meta: node.info?.composer ? [{ key: 'composer', value: node.info.composer }] : [],
+            };
+        case 'instrument':
+            return { typeTag: 'instrument', label: node.name, meta: [] };
+        case 'variation': {
+            const dep = node.dependsOn;
+            const label = dep == null ? '(root variation)'
+                : isNaN(Number(dep)) ? `ATTR: ${dep}`
+                : String(dep);
+            return { typeTag: 'variation', label, meta: [] };
+        }
+        case 'label_spec':
+            return { typeTag: 'label', label: node.label ?? '(no label)', meta: [] };
+        case 'bar':
+            return { typeTag: 'bar', label: node.id, meta: [] };
+        case 'voice':
+            return { typeTag: 'voice', label: node.name, meta: [] };
+        case 'offset':
+            return { typeTag: 'tick', label: String(node.tick ?? '?'), meta: [] };
+        case 'motif':
+            return { typeTag: 'motif', label: node.label, meta: node.isStatic ? [{ key: 'static', value: '✓' }] : [] };
+        case 'stem_note':
+            return { typeTag: 'stem_note', label: String(node.pitch), meta: [] };
+        case 'article': {
+            const n = node.properties?.length ?? 0;
+            return { typeTag: 'article', label: node.name, meta: n ? [{ key: 'props', value: n }] : [] };
+        }
+        default:
+            return { typeTag: node.type, label: node.type, meta: [] };
+    }
+}

static/store.js

@@ -4,10 +4,10 @@ export const store = reactive({
     scoreModel: null,
     rawScoreText: null,
     focusPath: [],
-    credentials: null,
     synthesisStatus: null,
     isDirty: false,
     errorMessage: '',
+    exportLog: [],
 
     setFocus(path) {
         this.focusPath = path;
@@ -25,4 +25,10 @@ export const store = reactive({
     markDirty() {
         this.isDirty = true;
     },
+
+    resetEditState() {
+        this.isDirty = false;
+        this.exportLog = [];
+        this.focusPath = [];
+    },
 });

static/style.css

@@ -247,54 +247,6 @@
     pointer-events: none;
 }
 
-/* Import dialog */
-.se-import-dialog {
-    position: fixed;
-    top: 50%;
-    left: 50%;
-    transform: translate(-50%, -50%);
-    background: #1e1e1e;
-    border: 1px solid #555;
-    padding: 1.5rem;
-    z-index: 1000;
-    min-width: 20rem;
-}
-
-.se-import-dialog h3 {
-    margin: 0 0 1rem 0;
-    font-size: 1rem;
-}
-
-.se-import-dialog label {
-    display: block;
-    font-size: 0.8rem;
-    color: #aaa;
-    margin-bottom: 0.2rem;
-}
-
-.se-import-dialog input {
-    width: 100%;
-    background: #111;
-    border: 1px solid #444;
-    color: #ddd;
-    padding: 0.3rem;
-    box-sizing: border-box;
-    margin-bottom: 0.8rem;
-    font-family: monospace;
-}
-
-.se-import-dialog .se-dialog-buttons {
-    display: flex;
-    gap: 0.5rem;
-    justify-content: flex-end;
-}
-
-.se-overlay {
-    position: fixed;
-    inset: 0;
-    background: rgba(0,0,0,0.6);
-    z-index: 999;
-}
 
 /* Buttons */
 .se-btn {
@@ -355,3 +307,135 @@
     white-space: pre-wrap;
     font-family: monospace;
 }
+
+/* Bar sub-objects: grouped by P?L? key, chips inline per group */
+.se-bar-groups {
+    padding: 0.2rem 0;
+}
+
+.se-bar-group {
+    padding: 0.15rem 0.1rem;
+    border-bottom: 1px solid #1e1e1e;
+    line-height: 1.8;
+}
+
+.se-bar-chip {
+    display: inline-flex;
+    align-items: center;
+    font-size: 0.7rem;
+    font-family: monospace;
+    border: 1px solid #383838;
+    background: #1e1e1e;
+    color: #777;
+    margin: 1px;
+    line-height: 1.4;
+    vertical-align: middle;
+}
+
+.se-bar-chip.focused {
+    background: #1a3a5a;
+    color: #ddd;
+    border-color: #4a7aaa;
+}
+
+.se-bar-chip-label {
+    padding: 0.1rem 0.2rem;
+    cursor: pointer;
+}
+
+.se-bar-chip:hover .se-bar-chip-label {
+    color: #ccc;
+}
+
+.se-bar-chip-delete {
+    background: transparent;
+    border: none;
+    border-left: 1px solid #383838;
+    color: #604040;
+    cursor: pointer;
+    padding: 0.1rem 0.2rem;
+    font-size: 0.75rem;
+    line-height: 1;
+}
+
+.se-bar-chip-delete:hover {
+    color: #e06060;
+}
+
+.se-bar-add {
+    display: inline-block;
+    font-size: 0.65rem;
+    font-family: monospace;
+    padding: 0.1rem 0.3rem;
+    border: 1px dashed #383838;
+    background: transparent;
+    color: #505050;
+    cursor: pointer;
+    margin: 1px;
+    line-height: 1.4;
+    vertical-align: middle;
+}
+
+.se-bar-add:hover {
+    color: #999;
+    border-color: #666;
+}
+
+/* Export log (shown in CP pane after export) */
+.se-export-log {
+    font-size: 0.75rem;
+    font-family: monospace;
+    border: 1px solid #333;
+    padding: 0.3rem 0.4rem;
+    margin: 0.4rem 0;
+}
+.se-export-changed {
+    color: #aad4aa;
+}
+.se-export-info {
+    color: #888;
+}
+
+.se-prop-key, .se-prop-val {
+    background: #1a1a1a;
+    color: #d8d8d8;
+    border: 1px solid #444;
+    border-radius: 0.2rem;
+    padding: 0.15rem 0.3rem;
+    font-family: monospace;
+    font-size: 0.8rem;
+}
+.se-prop-key:focus, .se-prop-val:focus {
+    outline: none;
+    border-color: #7a7a7a;
+    background: #222;
+}
+
+.se-btn-remove {
+    background: transparent;
+    color: #888;
+    border: 1px solid #444;
+    border-radius: 0.2rem;
+    cursor: pointer;
+    padding: 0 0.4rem;
+    font-size: 0.9rem;
+    line-height: 1;
+}
+.se-btn-remove:hover {
+    color: #e06060;
+    border-color: #602020;
+}
+
+.se-btn-delete {
+    background: transparent;
+    color: #e06060;
+    border: none;
+    cursor: pointer;
+    padding: 0 0.3rem;
+    font-size: 0.9rem;
+    line-height: 1;
+    margin-left: 0.15rem;
+}
+.se-btn-delete:hover {
+    color: #ff8080;
+}

static/subobject-kinds.js

@@ -0,0 +1,123 @@
+export const KIND_LABEL = {
+    tuning:     'TU',
+    stage:      'ST',
+    instrument: 'IN',
+    articles:   'AR',
+    bar:        'BA',
+    variation:  'VR',
+    label_spec: 'LA',
+    voice:      'VO',
+    motif:      'MO',
+    offset:     'OF',
+    stem_note:  'SN',
+};
+
+export function getKindGroups(node) {
+    if (!node) return [];
+
+    if (node.type === 'score') {
+        const groups = [];
+
+        if (node.tuning) {
+            groups.push({ kind: 'tuning', items: [
+                { kind: 'tuning', node: node.tuning, label: `base ${node.tuning.base ?? '?'}`, hasChildren: false },
+            ]});
+        }
+
+        const stage = [
+            ...(node.stageCone ? [{ kind: 'stage', node: node.stageCone, label: 'cone (orchestra)', hasChildren: false }] : []),
+            ...(node.stageVoices ?? []).map(sv => ({ kind: 'stage', node: sv, label: sv.name, hasChildren: false })),
+        ];
+        if (stage.length) groups.push({ kind: 'stage', items: stage });
+
+        if (node.instruments.length) {
+            groups.push({ kind: 'instrument', items: node.instruments.map(i => ({
+                kind: 'instrument', node: i, label: i.name, hasChildren: !i.isLinked, readOnly: i.isLinked,
+                deletable: true,
+            }))});
+        }
+
+        if ((node.articles ?? []).length) {
+            groups.push({ kind: 'articles', items: node.articles.map(a => {
+                const counts = a.properties.reduce((acc, p) => {
+                    acc[p.scope] = (acc[p.scope] ?? 0) + 1; return acc;
+                }, {});
+                const suffix = Object.entries(counts).map(([s, n]) => `${n} ${s}`).join(', ');
+                return { kind: 'articles', node: a, label: `${a.name} (${suffix})`, hasChildren: false, deletable: true };
+            })});
+        }
+
+        if (node.bars.length) {
+            groups.push({ kind: 'bar', items: node.bars.map(b => ({
+                kind: 'bar', node: b, label: b.id, hasChildren: Object.keys(b.voices).length > 0,
+                deletable: true,
+            }))});
+        }
+
+        return groups;
+    }
+
+    if (node.type === 'instrument') {
+        if (!node.variations.length) return [];
+        return [{ kind: 'variation', items: node.variations.map((v, idx) => ({
+            kind: 'variation', node: v,
+            label: `variation ${idx + 1}${v.dependsOn ? ` (${v.dependsOn})` : ''}`,
+            hasChildren: true, deletable: true,
+        }))}];
+    }
+
+    if (node.type === 'variation') {
+        const groups = [];
+        if (node.labelSpecs.length) {
+            groups.push({ kind: 'label_spec', items: node.labelSpecs.map(ls => ({
+                kind: 'label_spec', node: ls, label: ls.label ?? '(no label)', hasChildren: false, deletable: true,
+            }))});
+        }
+        if (node.subvariations.length) {
+            groups.push({ kind: 'variation', items: node.subvariations.map((sv, idx) => {
+                const dep = sv.dependsOn;
+                const label = dep == null ? `subvariation ${idx + 1}`
+                    : isNaN(Number(dep)) ? `ATTR: ${dep}`
+                    : String(dep);
+                return { kind: 'variation', node: sv, label, hasChildren: true, deletable: true };
+            })});
+        }
+        return groups;
+    }
+
+    if (node.type === 'bar') {
+        const entries = Object.entries(node.voices);
+        if (!entries.length) return [];
+        return [{ kind: 'voice', items: entries.map(([name, v]) => ({
+            kind: 'voice', node: v, label: name,
+            hasChildren: v.offsets.length > 0 || v.motifs.some(m => m.isStatic),
+        }))}];
+    }
+
+    if (node.type === 'voice') {
+        const groups = [];
+        const staticMotifs = node.motifs.filter(m => m.isStatic);
+        if (staticMotifs.length) {
+            groups.push({ kind: 'motif', items: staticMotifs.map(m => ({
+                kind: 'motif', node: m, label: m.label, hasChildren: m.stemNotes.length > 0,
+            }))});
+        }
+        if (node.offsets.length) {
+            groups.push({ kind: 'offset', items: node.offsets.map((o, idx) => ({
+                kind: 'offset', node: o, label: `tick ${o.tick ?? idx}`, hasChildren: o.stemNotes.length > 0,
+            }))});
+        }
+        return groups;
+    }
+
+    if (node.type === 'motif' || node.type === 'offset') {
+        if (!node.stemNotes.length) return [];
+        return [{ kind: 'stem_note', items: node.stemNotes.map(sn => ({
+            kind: 'stem_note', node: sn,
+            label: `pitch ${sn.pitch}${sn.clauses.length ? ` (${sn.clauses.length} clause${sn.clauses.length > 1 ? 's' : ''})` : ''}`,
+            hasChildren: false,
+        }))}];
+    }
+
+    return [];
+}

static/util.js

@@ -0,0 +1,13 @@
+export function coerce(s) {
+    if (s === 'True' || s === 'Y' || s === 'on' || s === 'true') return true;
+    if (s === 'False' || s === 'N' || s === 'off' || s === 'false') return false;
+    if (s === '') return s;
+    const n = Number(s);
+    if (!isNaN(n)) return n;
+    return s;
+}
+
+export function stressorToString(s) {
+    if (!s?.groups?.length) return '';
+    return s.groups.map(g => g.join(',')).join(';');
+}

test-parser.mjs

@@ -4,7 +4,9 @@
 
 import { readFileSync } from 'fs';
 import { parseAstLog, buildModel } from './static/ast-parser.js';
-import { exportInstrument, patchScore, stressorToString } from './static/exporter.js';
+import { exportInstrument, patchScore } from './static/exporter.js';
+import { stressorToString } from './static/util.js';
+import { shortView } from './static/node-views.js';
 
 const FIXTURE = new URL('./fixtures/ast.log', import.meta.url);
 const text = readFileSync(FIXTURE, 'utf8');
@@ -31,6 +33,69 @@ ok('has bars', model.bars.length > 0);
 ok('432 bars', model.bars.length === 432);
 console.log(`     bars: ${model.bars.length}, instruments: ${model.instruments.length}`);
 
+// ── Preamble (info, tuning, stage, articles) ───────────────────────────────
+section('Preamble');
+ok('info parsed',                    model.info && typeof model.info.title === 'string');
+ok('info composer',                  model.info?.composer === 'Ludwig van Beethoven');
+ok('tuning parsed',                  model.tuning && model.tuning.base === 'tones_euro_de+en');
+ok('tuning has scales',              Object.keys(model.tuning.scales).length > 0);
+ok('tuning.scales hm7',              Array.isArray(model.tuning.scales.hm7));
+ok('tuning has chords',              Object.keys(model.tuning.chords).length > 0);
+ok('tuning frequencyFactors object', model.tuning.frequencyFactors && typeof model.tuning.frequencyFactors === 'object');
+ok('frequencyFactors label',         model.tuning.frequencyFactors.label === 'just5lim');
+ok('frequencyFactors 12 ratios',     model.tuning.frequencyFactors.factors.length === 12);
+ok('stageCone parsed',               model.stageCone && model.stageCone.type === 'stage_cone');
+ok('stageCone has minvol',           model.stageCone.minvol !== undefined);
+ok('stageVoices parsed',             model.stageVoices.length === 3);
+ok('stageVoices[0] is "pi"',         model.stageVoices[0].name === 'pi');
+ok('stageVoices[0].direction',       model.stageVoices[0].direction === '1|1');
+ok('articles array non-empty',       model.articles.length > 0);
+ok('articles[0].name "f"',           model.articles[0].name === 'f');
+ok('articles[0].properties[]',       Array.isArray(model.articles[0].properties));
+const fProp = model.articles[0].properties.find(p => p.name === 'add_stress');
+ok('articles[0] add_stress prop',    fProp && fProp.value === 3 && fProp.scope === 'defaults');
+
+// Article slot structure: stage.article with article.defaults / article.overwrites children
+const MERGE_FIXTURE = `01 stage.article 'g'
+02 article.defaults 'add_stress' constant=2
+02 article.overwrites 'pitch_bend'
+`;
+const mergeRoot = parseAstLog('00 tuning base=\'x\'\n' + MERGE_FIXTURE);
+const mergeModel = buildModel(mergeRoot);
+ok('merge: single entry per label',     mergeModel.articles.length === 1);
+ok('merge: label "g"',                  mergeModel.articles[0].name === 'g');
+ok('merge: 2 properties',               mergeModel.articles[0].properties.length === 2);
+const gDef  = mergeModel.articles[0].properties.find(p => p.scope === 'defaults');
+const gOver = mergeModel.articles[0].properties.find(p => p.scope === 'overwrites');
+ok('merge: default scope present',      gDef  && gDef.name === 'add_stress' && gDef.value === 2);
+ok('merge: overwrite scope present',    gOver && gOver.name === 'pitch_bend' && gOver.value === null);
+
+section('article.definite on stem_note');
+const DEF_ART = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.offset tick=0
+03 line.stem_note pitch='G5' articulatory='tailed'
+04 article.definite 'tailed' constant=3
+04 stem_note.chain _tmp_string='o'
+05 chain.clause 0
+06 seq.note letters='o' shift=0 length=1 netlength=1
+`;
+const defArtModel = buildModel(parseAstLog(DEF_ART));
+const defSN = defArtModel.bars[0].voices['pi'].offsets[0].stemNotes[0];
+ok('definite prop flattened onto stem_note', defSN.tailed === 3);
+ok('articulatory not in unknownProps', defSN.unknownProps?.articulatory === undefined);
+
+section('stem_note weight');
+const WEIGHT_SN = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.offset tick=0
+03 line.stem_note pitch='C4' weight=0.8
+`;
+const weightModel = buildModel(parseAstLog(WEIGHT_SN));
+const weightSN = weightModel.bars[0].voices['pi'].offsets[0].stemNotes[0];
+ok('weight parsed', weightSN.weight === 0.8);
+ok('weight null when absent', defSN.weight === null);
+
 // ── Bar IDs ────────────────────────────────────────────────────────────────
 // Bar IDs are opaque auto-increment strings; only the raw id string matters.
 section('Bar IDs');
@@ -192,23 +257,22 @@ const SCORE_FIXTURE = new URL('./fixtures/pathetique.spls', import.meta.url);
 const rawScore = readFileSync(SCORE_FIXTURE, 'utf8');
 
 // pathetique.spls contains alpha and ki; dev/piano is a linked instrument not embedded.
-// Mark only alpha as dirty, verify ki is preserved verbatim.
-const patchInstruments = model.instruments.map(i => ({ ...i, isDirty: i.name === 'alpha' }));
-const patched = patchScore(rawScore, patchInstruments);
+// All non-linked instruments are always re-serialized; linked+unmodified are passed through.
+const patchInstruments = model.instruments.map(i => ({ ...i }));
+const { text: patched, log: patchLog } = patchScore(rawScore, patchInstruments);
 const patchedLines = patched.split('\n');
 
 ok('patched score still has instrument alpha:', patchedLines.some(l => /^instrument\s+alpha\s*:/.test(l)));
 ok('patched score still has instrument ki:', patchedLines.some(l => /^instrument\s+ki\s*:/.test(l)));
 ok('patched score alpha block contains character:', patchedLines.some(l => l.trim() === 'character:'));
+ok('patchScore log records alpha as changed', patchLog.some(e => e.level === 'changed' && e.path === 'instrument / alpha'));
+ok('patchScore log records ki as changed', patchLog.some(e => e.path?.includes('ki')));
 
-// Ki is clean — its block must appear verbatim (check a unique line from the original)
-const kiOrigLines = rawScore.split('\n').filter(l => l.startsWith('instrument ki:') || (l.startsWith(' ') && rawScore.indexOf('instrument ki:') < rawScore.indexOf(l)));
-// Simpler: original ki block should still exist in patched
-const kiOrigIdx = rawScore.indexOf('\ninstrument ki:');
-const kiBlock = kiOrigIdx >= 0 ? rawScore.slice(kiOrigIdx + 1, rawScore.indexOf('\ninstrument ', kiOrigIdx + 1) >>> 0 || undefined) : '';
-if (kiBlock) {
-    const firstKiLine = kiBlock.split('\n')[0];
-    ok('ki block preserved verbatim (first line)', patched.includes(firstKiLine));
+// dev/piano is linked and unmodified — it should pass through verbatim
+const pianoInstr = patchInstruments.find(i => i.name === 'dev/piano');
+if (pianoInstr) {
+    ok('dev/piano is linked', pianoInstr.isLinked === true);
+    ok('dev/piano not in log (linked+unmodified)', !patchLog.some(e => e.path?.includes('dev/piano')));
 }
 
 // patched score must not be empty and must be shorter or same length as original + alpha export
@@ -216,7 +280,7 @@ ok('patched score is non-empty', patched.length > 100);
 ok('patched score has no double blank lines beyond original', true); // structural sanity only
 
 // ── FM modulation with embedded shape (synthetic) ─────────────────────────
-// The fixture's FM+shape is inside PROFILE.partial (rawChildren) and unreachable
+// The fixture's FM+shape is inside PROFILE.partial (unknownSlots) and unreachable
 // from buildBasicProperties. Verify with a synthetic AST log fragment.
 section('FM modulation with embedded shape (synthetic)');
 const FM_FIXTURE = `00 instrument 'test'
@@ -381,7 +445,6 @@ voice soprano:
 
 const dirtyBar = {
     id: '001P1L1M1',
-    isDirty: true,
     stressor: { groups: [[2, 3], [1]] },
     tempoLevels: 140,
     upperStressBound: null,
@@ -390,18 +453,23 @@ const dirtyBar = {
 };
 const cleanBar = {
     id: '001P1L1M2',
-    isDirty: false,
-    stressor: null, tempoLevels: null,
+    stressor: null, tempoLevels: 100,
     upperStressBound: null, lowerStressBound: null, tempoShape: null,
 };
-const barPatched = patchScore(RAW_SCORE_WITH_BARS, [], [dirtyBar, cleanBar]);
+const { text: barPatched, log: barLog } = patchScore(RAW_SCORE_WITH_BARS, [], [dirtyBar, cleanBar]);
 const barPatchedLines = barPatched.split('\n');
 ok('dirty bar _meta updated with new BPM', barPatched.includes('beats_per_minute: 140'));
 ok('dirty bar stress_pattern updated', barPatched.includes('stress_pattern: 2,3;1'));
 ok('dirty bar voice content preserved', barPatched.includes('- C4 4'));
-ok('clean bar unchanged', barPatched.includes('beats_per_minute: 100'));
+ok('clean bar BPM preserved via model', barPatched.includes('beats_per_minute: 100'));
 ok('clean bar voice preserved', barPatched.includes('- D4 4'));
 ok('document separators preserved', (barPatched.match(/\n---\n/g) ?? []).length === 2);
+ok('bar log records dirty bar as changed', barLog.some(e => e.level === 'changed' && e.path === 'bar / 001P1L1M1'));
+ok('bar log records clean bar as changed', barLog.some(e => e.level === 'changed' && e.path === 'bar / 001P1L1M2'));
+
+// Minimal instrument stub reused across patchScore tests that don't care about instrument content.
+const STUB_ALPHA = { name: 'alpha', isLinked: false, variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] };
+const STUB_KI = { name: 'ki', isLinked: false, variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] };
 
 // ── patchScore metadata ────────────────────────────────────────────────────
 section('patchScore metadata');
@@ -414,21 +482,324 @@ instrument alpha:
     A: "1:0,10;1,0"
 `;
 const updatedInfo = { title: 'New Title', composer: 'New Composer', source: '', encrypter: 'Me' };
-const metaPatched = patchScore(META_SCORE, [], [], updatedInfo);
+const { text: metaPatched } = patchScore(META_SCORE, [STUB_ALPHA], [], updatedInfo);
 ok('existing title replaced', metaPatched.includes('title: New Title'));
 ok('existing composer replaced', metaPatched.includes('composer: New Composer'));
 ok('empty value leaves existing line', metaPatched.includes('source: Some Book'));
 ok('new key prepended', metaPatched.includes('encrypter: Me'));
-ok('instrument block untouched', metaPatched.includes('instrument alpha:'));
+ok('instrument block present', metaPatched.includes('instrument alpha:'));
 
 const META_SCORE_NO_TITLE = `composer: Bach\n\ninstrument ki:\n  character:\n`;
-const noTitlePatched = patchScore(META_SCORE_NO_TITLE, [], [], { title: 'Fugue', composer: 'Bach' });
+const { text: noTitlePatched } = patchScore(META_SCORE_NO_TITLE, [STUB_KI], [], { title: 'Fugue', composer: 'Bach' });
 ok('missing title prepended', noTitlePatched.includes('title: Fugue'));
 ok('existing composer not duplicated', (noTitlePatched.match(/^composer:/mg) ?? []).length === 1);
 
-const nullInfoPatched = patchScore(META_SCORE, [], [], null);
+const { text: nullInfoPatched } = patchScore(META_SCORE, [STUB_ALPHA], [], null);
 ok('null info leaves metadata unchanged', nullInfoPatched.includes('title: Old Title'));
 
+// ── patchScore articles ────────────────────────────────────────────────────
+section('patchScore articles');
+const ART_SCORE = `articles:\n    f: { add_stress: 3 }\n\ninstrument alpha:\n  character:\n`;
+const artModel = [{ name: 'f', properties: [{ name: 'add_stress', value: 4, scope: 'defaults' }] }];
+const { text: artPatched, log: artLog } = patchScore(ART_SCORE, [STUB_ALPHA], [], null, artModel);
+ok('article block replaced', artPatched.includes('articles:'));
+ok('updated value written', artPatched.includes('add_stress: 4'));
+ok('old flow-style entry removed', !artPatched.includes('{ add_stress: 3 }'));
+ok('instrument line still present', artPatched.includes('instrument alpha:'));
+ok('article change logged', artLog.some(e => e.level === 'changed' && e.path === 'articles / f'));
+
+const ART_SCORE_NO_ART = `instrument alpha:\n  character:\n`;
+const { text: artInserted } = patchScore(ART_SCORE_NO_ART, [STUB_ALPHA], [], null, artModel);
+ok('article block inserted before instrument when missing', artInserted.indexOf('articles:') < artInserted.indexOf('instrument alpha:'));
+
+// ── patchScore articles with overwrites ───────────────────────────────────
+section('patchScore articles with overwrites');
+const OVW_SCORE = `articles:\n  f:\n    add_stress: 3\n\ninstrument alpha:\n  character:\n`;
+const ovwModel = [{ name: 'f', properties: [
+    { name: 'add_stress', value: 4, scope: 'defaults' },
+    { name: 'add_stress', scope: 'overwrites' },
+]}];
+const { text: ovwPatched } = patchScore(OVW_SCORE, [STUB_ALPHA], [], null, ovwModel);
+ok('overwrites emit -important block', ovwPatched.includes('-important:'));
+ok('overwrites list entry present', ovwPatched.includes('- add_stress'));
+
+// ── patchScore deleted bars ────────────────────────────────────────────────
+section('patchScore deleted bars');
+const delBar2 = { id: '001P1L1M2', stressor: null, tempoLevels: null, upperStressBound: null, lowerStressBound: null, tempoShape: null };
+const { text: delBarPatched } = patchScore(RAW_SCORE_WITH_BARS, [], [delBar2]);
+ok('deleted bar removed from output', !delBarPatched.includes('_id: 001P1L1M1'));
+ok('non-deleted bar preserved', delBarPatched.includes('_id: 001P1L1M2'));
+ok('deleted bar reduces document count', (delBarPatched.match(/\n---\n/g) ?? []).length === 1);
+
+// ── patchScore new bars ────────────────────────────────────────────────────
+section('patchScore new bars');
+const existingBar1 = { id: '001P1L1M1', stressor: null, tempoLevels: 120, upperStressBound: null, lowerStressBound: null, tempoShape: null };
+const existingBar2 = { id: '001P1L1M2', stressor: null, tempoLevels: 100, upperStressBound: null, lowerStressBound: null, tempoShape: null };
+const newBarEntry = { id: '001P1L1M3', _isNew: true, stressor: null, tempoLevels: 120, upperStressBound: null, lowerStressBound: null, tempoShape: null };
+const { text: newBarPatched, log: newBarLog } = patchScore(RAW_SCORE_WITH_BARS, [], [existingBar1, existingBar2, newBarEntry]);
+ok('new bar appended to output', newBarPatched.includes('_id: 001P1L1M3'));
+ok('new bar has _meta with BPM', newBarPatched.includes('beats_per_minute: 120'));
+ok('new bar appended as extra document', (newBarPatched.match(/\n---\n/g) ?? []).length === 3);
+ok('new bar logged as changed', newBarLog.some(e => e.level === 'changed' && e.path === 'bar / 001P1L1M3'));
+
+// ── NOT_CHANGED_SINCE epoch → ISO conversion ──────────────────────────────
+section('NOT_CHANGED_SINCE: epoch converted on passthrough, now on re-serialize');
+const ncsScore = `instrument linked/pi:\n  NOT_CHANGED_SINCE: 1710000000.0\n  character:\n    A: "1:0,10;1,0"\n\ninstrument embedded:\n  NOT_CHANGED_SINCE: 1710000000.0\n  character:\n    A: "1:0,5;1,0"\n`;
+const ncsList = [
+    { name: 'linked/pi', isLinked: true, _modified: false, notChangedSince: 1710000000.0,
+      variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] },
+    { name: 'embedded', isLinked: false, _modified: true, notChangedSince: 1710000000.0,
+      variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] },
+];
+const { text: ncsPatched } = patchScore(ncsScore, ncsList);
+const ISO_RX = /\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}/;
+const ncsLines = ncsPatched.split('\n');
+const linkedNCS = ncsLines.find(l => /NOT_CHANGED_SINCE/.test(l) && ncsLines.indexOf(l) < ncsLines.findIndex(l2 => /instrument embedded/.test(l2)));
+const embeddedNCS = ncsLines.find((l, i) => /NOT_CHANGED_SINCE/.test(l) && i > ncsLines.findIndex(l2 => /instrument embedded/.test(l2)));
+ok('linked passthrough: epoch converted to ISO date', linkedNCS && ISO_RX.test(linkedNCS) && !linkedNCS.includes('1710000000'));
+ok('modified instrument: NOT_CHANGED_SINCE set to now', embeddedNCS && ISO_RX.test(embeddedNCS) && !embeddedNCS.includes('1710000000'));
+
+// ── patchScore deleted instrument ─────────────────────────────────────────
+section('patchScore deleted instrument');
+const delInstrScore = `instrument alpha:\n  character:\n    A: "1:0,10;1,0"\n\ninstrument ki:\n  character:\n    A: "1:0,5;1,0"\n`;
+const delInstrList = [
+    { name: 'ki', variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] },
+];
+const { text: delInstrPatched, log: delInstrLog } = patchScore(delInstrScore, delInstrList);
+ok('deleted instrument removed from output', !delInstrPatched.includes('instrument alpha:'));
+ok('non-deleted instrument preserved', delInstrPatched.includes('instrument ki:'));
+ok('ki re-serialized and logged', delInstrLog.some(e => e.level === 'changed' && e.path?.includes('ki')));
+
+// ── patchScore stage section cleanup ─────────────────────────────────────
+section('patchScore stage section: deleted instrument removes voice entry');
+// pi → mapping form, instrument: dev/piano (present) → keep
+// ki → mapping form, instrument: alpha (deleted) → remove
+// alpha → string form, implicit name=alpha (deleted) → remove
+const stageScore = [
+    'stage:',
+    '    pi:',
+    '        direction: 1|1',
+    '        distance: 0',
+    '        instrument: dev/piano',
+    '    ki:',
+    '        direction: 2|1',
+    '        distance: 1',
+    '        instrument: alpha',
+    '    alpha: 2|3 0',
+    '',
+    'instrument dev/piano:',
+    '  character:',
+    '    A: "1:0,10;1,0"',
+].join('\n');
+const stageInstrList = [
+    { name: 'dev/piano', variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] },
+];
+const { text: stagePatched } = patchScore(stageScore, stageInstrList);
+ok('voice with explicit deleted instrument (mapping form) removed', !stagePatched.includes('    ki:'));
+ok('voice with implicit deleted name (string form) removed', !stagePatched.includes('    alpha:'));
+ok('voice with explicit surviving instrument (mapping form) kept', stagePatched.includes('    pi:'));
+ok('instrument dev/piano block re-serialized', stagePatched.includes('instrument dev/piano:'));
+
+const stageScoreKeep = [
+    'stage:',
+    '    pi:',
+    '        direction: 1|1',
+    '        distance: 0',
+    '        instrument: dev/piano',
+    '    ki: 2|1 1',
+].join('\n');
+const stageInstrKeep = [
+    { name: 'dev/piano', variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] },
+    { name: 'ki', variations: [], basicProperties: null, volumes: null, timbre: null, fmModulations: [], amModulations: [] },
+];
+const { text: stageKeptPatched } = patchScore(stageScoreKeep, stageInstrKeep);
+ok('retained voice with explicit instrument key kept', stageKeptPatched.includes('    pi:'));
+ok('retained voice with implicit instrument name kept', stageKeptPatched.includes('    ki:'));
+
+// ── Motif parsing ─────────────────────────────────────────────────────────
+section('Motif parsing — dynamic motif');
+const DYN_MOTIF = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.motif label='oct'
+03 line.stem_note pitch=0
+04 stem_note.chain _tmp_string='oo'
+05 chain.clause 0 repeat=1
+06 seq.note letters='o' shift=0 length=1 netlength=1
+06 seq.note letters='o' shift=12 netlength=1 length=1
+`;
+const dynBar = buildModel(parseAstLog(DYN_MOTIF)).bars[0];
+const dynVoice = dynBar.voices['pi'];
+ok('motif is object', typeof dynVoice.motifs[0] === 'object');
+ok('motif label', dynVoice.motifs[0].label === 'oct');
+ok('motif pitch=0', dynVoice.motifs[0].stemNotes[0].pitch === 0);
+ok('dynamic motif isStatic=false', dynVoice.motifs[0].isStatic === false);
+ok('dynamic motif has 1 clause', dynVoice.motifs[0].stemNotes[0].clauses.length === 1);
+ok('clause has 2 notes', dynVoice.motifs[0].stemNotes[0].clauses[0].notes.length === 2);
+
+section('Motif parsing — static motif');
+const STAT_MOTIF = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.motif label='cadence'
+03 line.stem_note pitch='C4'
+04 stem_note.chain _tmp_string='o'
+05 chain.clause 0
+06 seq.note letters='o' shift=0 length=1 netlength=1
+`;
+const statVoice = buildModel(parseAstLog(STAT_MOTIF)).bars[0].voices['pi'];
+ok('static motif isStatic=true', statVoice.motifs[0].isStatic === true);
+ok('static motif pitch string', statVoice.motifs[0].stemNotes[0].pitch === 'C4');
+
+section('Motif parsing — pause and stack in clause');
+const PS_FIXTURE = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.offset tick=0
+03 line.stem_note pitch='C4'
+04 stem_note.chain _tmp_string='o.oe'
+05 chain.clause 0
+06 seq.note letters='o' shift=0 length=1 netlength=1
+06 seq.pause length=1
+05 chain.clause 1
+06 seq.stack length=2 netlength=2
+07 stack.note letters='o' shift=0
+07 stack.note letters='e' shift=0
+`;
+const psVoice = buildModel(parseAstLog(PS_FIXTURE)).bars[0].voices['pi'];
+const psSn = psVoice.offsets[0].stemNotes[0];
+ok('two clauses', psSn.clauses.length === 2);
+ok('first clause has 1 note + 1 pause', psSn.clauses[0].notes.length === 1 && psSn.clauses[0].pauses.length === 1);
+ok('second clause has 1 stack', psSn.clauses[1].stacks.length === 1);
+ok('stack has 2 notes', psSn.clauses[1].stacks[0].notes.length === 2);
+
+section('Motif parsing — nested chain ignored gracefully');
+const NC_FIXTURE = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.offset tick=0
+03 line.stem_note pitch='C4'
+04 stem_note.chain _tmp_string='o(...)'
+05 chain.clause 0
+06 seq.note letters='o' shift=0 length=1 netlength=1
+06 seq.chain length=2
+07 chain.clause 0
+08 seq.stack length=1 netlength=1
+09 stack.note letters='o' shift=0
+`;
+const ncSn = buildModel(parseAstLog(NC_FIXTURE)).bars[0].voices['pi'].offsets[0].stemNotes[0];
+ok('nested chain: only 1 top-level clause', ncSn.clauses.length === 1);
+ok('nested chain: only direct note counted', ncSn.clauses[0].notes.length === 1);
+ok('nested chain: no stacks leak from nested chain', ncSn.clauses[0].stacks.length === 0);
+
+section('Depth-jump guard (abort)');
+const DJ_FIXTURE = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.motif label='oct'
+03 line.stem_note pitch='C4'
+07 chain.clause 0
+`;
+let djThrew = false;
+try { parseAstLog(DJ_FIXTURE); } catch (e) { djThrew = true; }
+ok('depth jump throws', djThrew);
+
+section('No-slot guard (abort)');
+const NS_FIXTURE = `00 bar '001P1L1M1'
+01 voice
+`;
+let nsThrew = false;
+try { parseAstLog(NS_FIXTURE); } catch (e) { nsThrew = true; }
+ok('missing slot throws', nsThrew);
+
+section('line.motif invocation at offset');
+const LM_FIXTURE = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.offset tick=0
+03 line.stem_note pitch='C4'
+04 stem_note.chain _tmp_string='o'
+05 chain.clause 0
+06 seq.note letters='o' shift=0 length=1 netlength=1
+03 line.motif 'coct'
+03 line.motif 'oct' chord='C2'
+`;
+const lmOffset = buildModel(parseAstLog(LM_FIXTURE)).bars[0].voices['pi'].offsets[0];
+ok('line.motif: offset has 1 stem note', lmOffset.stemNotes.length === 1);
+ok('line.motif: offset.motifRefs has 2 entries', lmOffset.motifRefs.length === 2);
+ok('line.motif: first motifRef label', lmOffset.motifRefs[0].label === 'coct');
+ok('line.motif: second motifRef label', lmOffset.motifRefs[1].label === 'oct');
+ok('line.motif: second motifRef chord', lmOffset.motifRefs[1].chord === 'C2');
+ok('line.motif: first motifRef chord null', lmOffset.motifRefs[0].chord === null);
+
+section('stem_note.write_to and chainText');
+const WT_FIXTURE = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.offset tick=0
+03 line.stem_note pitch='C2'
+04 stem_note.write_to 'coct'
+04 stem_note.chain _tmp_string='o=o+3*4'
+05 chain.clause 0 repeat=3
+06 seq.note letters='o' shift=0 netlength=1 length=1
+06 seq.note letters='o:f' shift=3 netlength=1 length=1
+`;
+const wtSn = buildModel(parseAstLog(WT_FIXTURE)).bars[0].voices['pi'].offsets[0].stemNotes[0];
+ok('write_to: writeToName', wtSn.writeToName === 'coct');
+ok('write_to: chainText from _tmp_string', wtSn.chainText === 'o=o+3*4');
+ok('write_to: clause parsed', wtSn.clauses.length === 1);
+ok('write_to: clause repeat', wtSn.clauses[0].repeat === 3);
+ok('write_to: clause notes', wtSn.clauses[0].notes.length === 2);
+ok('seq.note has letters field (not letter)', wtSn.clauses[0].notes[0].letters === 'o');
+ok('seq.note letters with article ref', wtSn.clauses[0].notes[1].letters === 'o:f');
+
+section('adjacent prop on stem_note');
+const ADJ_FIXTURE = `00 bar '001P1L1M1'
+01 bar.voice 'pi'
+02 voice.offset tick=0
+03 line.stem_note pitch='C4'
+03 line.stem_note pitch='D4' adjacent=False
+03 line.stem_note pitch='E4' adjacent=True
+`;
+const adjOffset = buildModel(parseAstLog(ADJ_FIXTURE)).bars[0].voices['pi'].offsets[0];
+ok('adjacent: null when absent', adjOffset.stemNotes[0].adjacent === null);
+ok('adjacent: false when False', adjOffset.stemNotes[1].adjacent === false);
+ok('adjacent: true when True', adjOffset.stemNotes[2].adjacent === true);
+
+section('shortView');
+ok('shortView null → ?',        shortView(null).typeTag === '?');
+ok('shortView score',           shortView(model).typeTag === 'score');
+ok('shortView score label',     shortView(model).label === model.info?.title);
+ok('shortView score meta',      shortView(model).meta.some(m => m.key === 'composer'));
+ok('shortView instrument',      shortView(model.instruments[0]).typeTag === 'instrument');
+ok('shortView instrument label',shortView(model.instruments[0]).label === model.instruments[0].name);
+ok('shortView bar',             shortView(model.bars[0]).typeTag === 'bar');
+ok('shortView bar label',       shortView(model.bars[0]).label === model.bars[0].id);
+ok('shortView article',         shortView(model.articles[0]).typeTag === 'article');
+const svV = model.instruments[0]?.variations[0];
+if (svV) {
+    ok('shortView variation root', shortView(svV).label === '(root variation)' || shortView(svV).label.startsWith('ATTR'));
+}
+
+section('unknownSlots graceful degradation');
+const UNK_FIXTURE = `00 instrument 'test'
+01 character.FUTURE_SLOT foo='bar'
+01 character.variation
+02 variation.ANOTHER_UNKNOWN x=1
+`;
+const unkModel = buildModel(parseAstLog(UNK_FIXTURE));
+const unkInstr = unkModel.instruments[0];
+ok('unknown slot: instrument parsed', !!unkInstr);
+ok('unknown slot: unknownSlots is array', Array.isArray(unkInstr.unknownSlots));
+ok('unknown slot: instrument-level unknown collected', unkInstr.unknownSlots.length === 1);
+ok('unknown slot: collected slot type', unkInstr.unknownSlots[0].type === 'FUTURE_SLOT');
+ok('variation-level unknown collected', unkInstr.variations[0]?.unknownSlots?.length === 1);
+
+section('Full fixture integration');
+ok('fixture parses without error (checked above)', raw && raw.slot === 'root');
+ok('fixture has 432 bars', model.bars.length === 432);
+const voicesWithMotifs = model.bars.flatMap(b => Object.values(b.voices)).filter(v => v.motifs.length > 0);
+ok('fixture voices have motif objects', voicesWithMotifs.every(v => v.motifs.every(m => typeof m === 'object' && 'label' in m)));
+const offsetsWithStemNotes = model.bars.flatMap(b => Object.values(b.voices)).flatMap(v => v.offsets).filter(o => o.stemNotes.length > 0);
+ok('fixture offsets have stem note objects', offsetsWithStemNotes.every(o => o.stemNotes.every(sn => 'pitch' in sn && 'clauses' in sn)));
+const offsetsWithMotifInvocations = model.bars.flatMap(b => Object.values(b.voices)).flatMap(v => v.offsets).filter(o => o.motifRefs?.length > 0);
+ok('fixture offset motif invocations are objects', offsetsWithMotifInvocations.every(o => o.motifRefs.every(m => 'label' in m)));
+const stemNotesWithChainText = offsetsWithStemNotes.flatMap(o => o.stemNotes).filter(sn => sn.chainText);
+ok('fixture stem notes with chain text have clauses', stemNotesWithChainText.every(sn => sn.clauses.length > 0));
+
 // ── Summary ────────────────────────────────────────────────────────────────
 console.log(`\n══ ${pass} passed, ${fail} failed ══\n`);
 process.exit(fail > 0 ? 1 : 0);