ledger: iteration 4 — SPRINT sprint-glance-and-loop COMPLETE (P-31/C-31 done; all 11 tasks green)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/agents/LEDGER.md

@@ -27,8 +27,8 @@ The shared queue all agents read and write. Lifecycle and rules: [`PROTOCOL.md`]
 | D-31 | Glance-mode concept doc: the Knowledge Center panel open WHILE the jam plays — what auto-follows live detection with zero clicks (current station's voicing gallery inline? licks strip for the style? what stays on screen vs behind interaction), density/space budget vs the Roadmap track, narrow-viewport plan, and the migration order for L-33. No user gate: pick the strongest layout, record rationale + rejected alternatives. **Returned once (2026-07-10):** piano gallery width understated ~45% (2-octave crops for rootless 7th-chord voicings → ~940px not 640; scroll is the piano rail's normal state on most loops) + licks strip ~190px not 150 + 4 clarifying notes; layout itself held — fixed + re-gate PASS | design | done | — | `docs/design/glance-mode.md` | doc names every component to touch, the auto-follow rules, and honest space math (what fits at 1280×900 and at narrow) |
 | L-33 | Implement glance mode per D-31 (`docs/design/glance-mode.md` — the "playhead accordion"): the station column at canonicalPos expands to the full D-30 gallery and advances with the playhead; licks strip below (level-filtered, token-boundary context match, strip-owned "fits — now" chrome, guitar licks under piano tab with honest heading); pin gesture inherits onFocusChord semantics; auto-follow never emits focus-chord and never auto-plays audio; piano rail EXPECTED to scroll (never assert one-row fits); follow the doc's 5-commit migration order | engineering | done | D-30, D-31 | `src/components/GlanceRail.jsx` (new), `src/components/JamGuide.jsx`, `src/components/VoicingBrowser.jsx` (optional additive `dense` prop only) | glance behaviours live per the doc; audio contract intact (App.jsx untouched or additive-only); build + smoke green |
 | P-30 | KB expansion: **neo-soul/rnb piano** cell (next per `docs/kb-backlog.md` after jazz/gospel) | content | done | — | `src/data/kb/rnb/piano.js`, `src/data/kb/index.js` | validator green + registered; renders in the piano tab; prose claims arithmetic-verified |
-| P-31 | KB expansion: **blues piano** cell | content | claimed | P-30 | `src/data/kb/blues/piano.js`, `src/data/kb/index.js` | validator green + registered |
-| C-31 | Sprint-end sweep: full build + validator + smoke + fixtures, then update PR #3 (push + PR body/comment summarising this sprint) per PROTOCOL §6 | quality | ready | L-31, L-33, D-30 | (none — verification) | all green; PR #3 updated |
+| P-31 | KB expansion: **blues piano** cell. **Returned once (2026-07-10):** turnaround jump-kicks bars 3-4 dyad orientations flipped (breaks the play's own only-leap law — gate pre-verified the exact swap) + 2 prose rewordings (♭7 "unmoved all night" contradicted by bar 9; "octave-and-change" actually a major 7th) — fixed + re-gate PASS | content | done | P-30 | `src/data/kb/blues/piano.js`, `src/data/kb/index.js` | validator green + registered |
+| C-31 | Sprint-end sweep: full build + validator + smoke + fixtures, then update PR #3 (push + PR body/comment summarising this sprint) per PROTOCOL §6 | quality | done | L-31, L-33, D-30 | (none — verification) | all green; PR #3 updated |
 
 > Sequencing: C-30 ‖ D-30 ‖ D-31 ‖ P-30 are file-disjoint and ready now. Then C-30 → L-30 → L-31 (serial chain on theory.js/App.jsx), and D-30+D-31 → L-33. P-31 fills spare iterations. Critic gates every task.
 
@@ -46,6 +46,8 @@ The shared queue all agents read and write. Lifecycle and rules: [`PROTOCOL.md`]
 
 > GATE 2026-07-10 (Critic) · **L-31 PASS** (`ce24d54`) — 🚨 audio contract CLEAN: 1 hunk in the progression useEffect, contract-grep zero hits, no ref-sync/mount props; theory.js ride-along comment-only (verified zero executable lines). Independent re-trace with own mirror + real detector: spurious-substitution commits #7 zero drops; section change replaces with zero intermediate nulls; breakdown first-null at foreign-commit 28 (comment's "~28" numerically exact) and clears at exactly 6 nulls; 2-rep flap survives with rival counter provably reset. HOSTILE-1 proved REPLACE_VOTES=3 load-bearing (rival hit 2 before agreement reset — 2 would displace-and-flap); alternating rivals never accumulate; newSong null-shape defensively handled. Build/smoke 817/817/validator green. 2/3/6 judged musically sensible; v-a commit-then-upgrade UX accepted over blank display. Non-blocking: "consecutive" comment nuance (nulls are neutral, not resetting — amend to "consecutive non-null" if ever touched); threshold consts re-created per render (trivially cheap, hoisting would exceed the lock); Luthier's +53/−12 was arithmetic sloppiness for +47/−6.
 
+> GATE 2026-07-10 (Critic) · **P-31 RETURNED → PASS on scoped re-gate** (`81cd230`) — first gate verified 90%+ of the pack exactly (♭VI7→V7 five-voice plane numerically perfect; all spans 11/4/22 legal; all 96 recipes render for 12 roots; rule-4 contrasts genuine) but returned 3 findings: jump-kicks bars 3-4 dyad orientations flipped (broke the play's own only-leap law; gate pre-verified the exact swap), "unmoved all night" contradicted by bar 9's own note, "octave-and-change" = actually a major 7th (11 semitones). Professor applied all 3; re-gate recomputed the lap chain from scratch: E4,B♭4 → G4,D♭5 → F4,C5 → F4,B4 → E4,B♭4 — "only leap" now provably unavoidable (all pairwise pc distances = 3), validator 164 plays / smoke 817/817 / build green, no fourth edit area.
+
 ---
 
 ## Shipped sprint: `sprint-knowledge-center` (branch: `sprint-jamguide-piano` — complete 2026-07-09, PR #3)
@@ -160,7 +162,8 @@ Emphasis this sprint: **ship the Jam Guide MVP** (put the 8 guitar style packs o
 - **Level-tag `FAMOUS_PROGRESSIONS`** (`src/lib/education.js`, Professor): famous-progression cards are exempt from the level filter this sprint (Maestro call 2026-07-08, per D-20 open question 1).
 - **Drift guards in smoke (Critic, tiny):** two hand-synced duplications need permanent smoke checks — JamGuide.jsx's copy of the validator's `resolveDegree` (fold in the L-24 gate's 16-degree × 14-quality drift test) and the 8-word technique vocab duplicated between `validate-kb.mjs` `LICK_TECHNIQUES` and `LickCard.jsx` `TECHNIQUE_VOCAB` (C-21 finding).
 - **`pianoVoicing` should return `rootPc` (Luthier, tiny):** callers currently must attach it themselves (JamGuide and VoicingBrowser both do); returning it at the source removes the false-"R" foot-gun for future consumers (D-24 gate observation — NOT a live bug, both call sites verified correct 2026-07-08).
-- **`docs/kb-backlog.md` is stale (Professor, tiny):** still lists gospel/pop guitar + jazz/gospel piano as "todo" though shipped; P-30 (rnb piano, 2026-07-10) also needs a done entry — refresh next content iteration (flagged by P-30, outside its lock).
+- **`docs/kb-backlog.md` is stale (Professor, tiny):** still lists gospel/pop guitar + jazz/gospel piano as "todo" though shipped; P-30 (rnb piano) AND P-31 (blues piano, both 2026-07-10) need done entries — refresh next content iteration (flagged by P-30 + C-31 sweep, outside their locks).
+- **`scripts/loop-fixtures.mjs` header comment drift (tiny):** cites "App.jsx:322-324" for adjacent-dup suppression; L-31 shifted it to ~line 364 — comment-only, fix when the file is next touched (C-31 sweep finding).
 - **Fingering view lost at gallery thumb size (Muse, small):** D-30's gallery renders ChordDiagram at `size="thumb"`, which never draws finger numbers — nothing in the browser shows fingering anymore (D-30 gate note 2026-07-10). If pedagogically wanted: tap-to-enlarge to `size="full"` inside a gallery cell.
 - **Negative-fret shape handling inconsistency (Luthier, small):** `voicings.js` skips shapes that compute negative frets while `chordAudio.guitarShapeToNotes` slides them up an octave — pre-existing, flagged at the L-23 gate; unify someday.
 
@@ -192,6 +195,7 @@ _(Maestro appends one line per completed iteration: `<date> · <task ids done>
 - 2026-07-09 · **iteration 8/24 — SPRINT `sprint-knowledge-center` COMPLETE** · done: C-21 (sprint-end sweep — build/validator/smoke all green on 72c6d45; full-App SSR renders; authored vs computed piano paths both proven; zero dead imports; audio contract +1 line since seed) · **PR #3 opened: https://github.com/whattheflat/JamBuddy/pull/3** (supersedes PR #2 — main hadn't absorbed it) · all 21 sprint tasks done, 4 returned-then-fixed by the gate, 0 unresolved · loop cron deleted after 8 of 24 budgeted iterations (board empty) · remaining backlog: EducationPanel retirement, FAMOUS_PROGRESSIONS level tags, smoke drift guards, pianoVoicing rootPc, negative-fret unify, L-12, bass renderer
 - 2026-07-09 · **iterations 6–7/24** · done: L-25 (`e24aa4b` instrument-scoped modal tabs), C-22 (`b4e8f12` validator hand-span rule, smoke 799), P-23 (`564a9e0` gospel piano cell, 140 plays — returned once: one improv-row scale claim false for vi7/iii7, split into exact rows, PASS re-gate; 39/40 first-pass claims held), L-24 (`2165bb5` authored piano packs render at stations — implementer agent hung at verification after ~1 h, killed, completion-pass agent audited + finished; Critic PASS with 0 resolver drift) · incidents: P-23 stalled once mid-authoring (resumed from transcript, no loss); L-24 hung silently (diff intact, completed by fresh agent) · backlog: resolveDegree drift guard filed · **board empty except C-21 → sprint-end sweep + PR**
 - 2026-07-08/09 · **iteration 5/24** · done: D-23 (`db397f6` VoicingBrowser show prop + LickCard stack-guard), D-24 (`e2110ae` MiniPiano thumbs crop to voicing span, 266→142 px), P-24 (11 licks rock/country/reggae — KB now **23 licks across 6 styles**, every note pitch-verified) — Critic PASS all three, zero returns · D-24 gate raised a false alarm on the D-21 rootPc fix (its harness bypassed VoicingBrowser; Maestro verified line 297 intact — no regression); hardening idea backlogged (`pianoVoicing` return rootPc) · promoted L-25 · next ready (all file-disjoint): L-24 ‖ L-25 ‖ C-22 ‖ P-23, then C-21 closes the sprint
+- 2026-07-10 · **iteration 4/24 — SPRINT `sprint-glance-and-loop` COMPLETE** · done: P-31 (`81cd230` blues piano cell, 164 plays — returned once: jump-kicks bars 3-4 dyad orientations flipped + 2 prose rewordings, fixed, PASS scoped re-gate), C-31 (sprint-end sweep at `81cd230` — build/validator/smoke 817 all green; full-App SSR renders with rail+gallery+strip coexisting; whole-sprint App.jsx diff = ONE hunk in the progression effect, contract grep 0 hits; no dead imports; every gate-promised follow-up verified filed) · all 11 sprint tasks done, 2 returned-then-fixed (D-31, P-31), 0 unresolved · PR #3 updated with the sprint summary; loop cron deleted after 4 of 24 budgeted iterations (board empty) · new backlog: loop-fixtures header line-ref drift; kb-backlog needs rnb+blues done entries
 - 2026-07-10 · **iteration 3/24** · done: L-33 (`c78baf4` **glance mode LIVE** — playhead accordion, licks strip, heard-live fallback; gate SSR 37/37, dense-less VoicingBrowser byte-identical to 0945a08, token matcher proven hostile-proof, App.jsx untouched by construction), L-31 (`ce24d54` commit layer 2/3/6 — gate re-traced all five scenarios independently + 3 hostile traces; REPLACE_VOTES=3 proven load-bearing; audio contract grep-clean) · **all three user asks now end-to-end on the branch** · P-31 (blues piano, 164 plays) authored — gate in flight; its verifier self-caught 3 prose overclaims pre-review · C-31 promoted (holds until P-31 lands so the sweep sees a settled tree) · next: gate P-31 → C-31 closes the sprint
 - 2026-07-10 · **iteration 2/24** · done: P-30 (`b51daa1` rnb piano cell, KB 154 plays — PASS first try, a piano-pack first; found+fixed its own 36-key-window stacking defect pre-review), L-30 (`4cc0009` detector rewrite: dup-collapse, weak-period ghost rejection, len 2–8, ≤1 edit/cycle with ≥2-exact evidence gate, recency-weighted coverage — smoke 817/817, gate ran 15 novel probes, 0.2–0.7ms/call) · L-33 built (playhead accordion + LicksStrip + heard-live fallback, SSR 24/24 self-checked) — gate in flight · L-31 dispatched with both gates' findings folded (flap-survival constraint, docstring ride-along) · both watchdog-stalled agents recovered cleanly via resume · promoted: P-31 · next: gate L-33, land L-31, then C-31 closes
 - 2026-07-10 · **iteration 1/24** · done: M-04, D-30 (`0945a08` VoicingBrowser gallery — all shapes/styles side by side, no chips; PASS first try), C-30 (`fdd93c7` 17 loop fixtures + smoke wiring; PASS — found the len² self-overlap artifact as the root cause of the user's missed 3-chord loops, folded into L-30/L-31 DoDs), D-31 (`6c7a1a7` glance-mode "playhead accordion" doc — returned once on piano-gallery width math, fixed, PASS re-gate) · in flight: L-30 (detector redesign, dispatched early — C-30 contract ready), P-30 (rnb piano) — both stalled once on the 600s API watchdog near completion, both resumed via SendMessage · promoted: L-33 (ready, locks per D-31 doc) · finding worth noting: "5 chords then 2 others" passes at pure-function level — the live failure is the ghost-pattern flapping starving the 2-vote commit layer (L-31's trace case)