- LABEL_GAP 6 -> 2 (user: labels sit way too far below their nodes).
- Hover glow is now PROPORTIONAL to the disc — outer radius = node radius
x 1.7 (GLOW_SCALE), matching the blur-a-copy-of-the-disc mental model,
instead of the old constant +6px pad that read huge on small nodes and
thin on big ones. GLOW_ALPHA 0.45 -> 0.3.
- Hover-OUT fade was broken by construction: draw() gated the glow on
hoverId, which nulls instantly on leave, so the 180ms fade-out ran
invisibly and the glow popped off in one frame. New hoverNode field
outlives hoverId through the outgoing fade (cleared when the fade
completes); verified live: 8 distinct frames over ~200ms then stable.
- Sliders rescaled per spec: ALL five are now log-scaled 0-100 with the
default dead-center at 50 (ranges chosen as default/4..default*4:
node/arrow/label size 0.5-8, edge width 0.25-4, labelZoom 0.0625-4),
coarse step 5 (21 stops; labels-until-zoom was "way too granular" at
201). Generic toSliderPosition/fromSliderPosition replace the
labelZoom-only pair; sanitize clamps follow the same range constants;
size sliders display compact values ("2", "1.6", "0.75").
EOF
- Defaults per user: nodeSize 2, edgeWidth 1, arrowLength 2, labelSize 2
(labelZoom 0.5 stays — reads as the "1x" they confirmed good).
- Label size slider floor 3 -> 1 so the default 2 is not the smallest
value; sanitize clamp widened to match.
- Cluster hull glow (layered low-alpha fills) removed for now: it read as
jagged up close (straight-line hull approximation at high zoom) and
does not belong until the layout settles. The solid viewer-relative
border and the inverse-gated region labels stay. HULL_FILL_LAYERS
constant deleted; hullShapes cache carries only the stroke path now.
- Saved render-settings.json reset so the new defaults apply on next load.
EOF
The defaults were calibrated in the screen-fixed era; world-scaling renders
sizes at setting x k/kFit, so at the default label gate (2x fit) everything
read ~2x too big ("labels way too large even at the minimum"). Fit-zoom
normalizes layout scale away, so the fix belongs in sizes, not layout:
spreading nodes further apart in world units changes nothing at fit.
- Defaults: nodeSize 6 -> 4, arrowLength 5 -> 4, labelSize 12 -> 7.
- Clamps/slider ranges widened at the low end: nodeSize 1-14 (step 0.5),
edgeWidth 0.25-4 (step 0.25), arrowLength 1-15 (step 0.5),
labelSize 3-24 (step 0.5).
- GLOW_PAD 9 -> 6 (halo dominated small discs), REGION_LABEL_SIZE 18 -> 14.
- Tests updated for the new clamp bounds plus a low-end pass-through case
(403/403). The saved render-settings.json still shadows defaults by
design; the local copy was reset so the new defaults showed immediately.
Fixes the zoom frame-rate collapse and rebuilds draw() around a single
camera transform, per the user's Obsidian-style sizing proposal.
Bug fix first: the eased zoom leaked a queued rAF callback per frame --
advanceZoom applies each step through d3-zoom, whose zoom event called
markDirty() from inside the tick loop, scheduling an extra draw while the
loop scheduled its own. Draws multiplied per displayed frame; sustained
wheel ran at ~20fps against a 120Hz display. markDirty now skips
scheduling while inTick (verified: 62 frames/500ms during a 28x zoom
burst, matching pan).
World-space model: every draw call now runs in graph coordinates under
one setTransform(k). Sizes are defined as screen-px-at-fit and converted
once per geometry build (/ kFit), so nodes, node labels, arrowheads and
the hover halo scale with the graph as you zoom (0.25x painted area at
half zoom, exactly k^2) while edge widths and hull borders stay
viewer-relative hairlines (/ k). Cluster hull geometry (convex hull +
three offset fills + solid boundary -- dashes dropped for now) is built
as cached Path2Ds per data/visibility/settings change; camera moves do
zero geometry math, making zoom per-frame cost identical to pan. Label
wrapping runs once per build, not per frame. Region labels stay
viewer-relative (18px at any zoom) as UI chrome. Picking radius scales
with the world-sized discs.
Glide feel: ZOOM_EASE_MS 120 -> 45, convergence 0.1% -> 0.2%; a notch now
settles in ~260ms instead of ~750ms. Resize still paints synchronously.
Also fixes barrel-law lint violations from the settings wave (import
from @/src/core and @/src/server, not deep module paths).
Five refinements to the hand-rolled renderer, all user-directed:
1. Settings are SERVER-persisted (data/render-settings.json via new
GET/PUT /api/graph/render-settings) - one source of truth for every
browser, replacing localStorage. The client loads once after mount,
saves debounced on user changes, and never lets a slow GET clobber a
faster user (or mounting PUT defaults over the server copy). The
shape/defaults/sanitizer moved to src/core/render-settings.ts - pure,
shared by client, server store, and tests; every disk/network value
passes through sanitizeRenderSettings.
2. New "Label size" control (default 12px - the previous hardcoded size).
Font, wrap width, and line height all scale; verified live: +76k px
with the label gate open.
3. "Labels until zoom" slider reworked: log-scaled over 0.0625-4 so the
useful band (0.25-0.5 camera-ratio units) sits at 33%/50% of the
track instead of crammed at the far left of the old linear 0.25-4
slider. Display units are normalized: the default 0.5 reads as "1x",
0.25 as "0.5x". The underlying labelZoom semantics are unchanged,
so existing values survive.
4. Smooth wheel zoom: d3-zoom instant per-notch jumps (x1.2, bang) are
replaced by an eased glide - wheel events accumulate a cursor-anchored
target scale and each tick eases the camera toward it (exponential,
120ms constant, frame-rate independent). Pan/pinch stay d3-owned; a
pan cancels a glide in progress. Verified live: 8-frame glide.
5. Resize blanking fixed (graph vanished for the duration of a window
drag, reappearing ~300ms after). Cause: every resize event
reallocated the canvas backing store - which CLEARS it - and the
redraw was deferred to rAF, which live resizes starve via relayout,
so the canvas sat wiped for the whole drag. Fix: the ResizeObserver
callback now redraws SYNCHRONOUSLY after reallocating (verified via
a probe RO firing in the same delivery batch: canvas fully painted).
kFit (the label gate 1x reference) is also recomputed on resize from
the now-cached world bbox - the camera itself still persists.
tests/render-settings.test.ts: 10 tests pinning the sanitizer (garbage/
partial/clamps, legacy no-labelSize records) and the slider mapping
(default dead-center at 500, monotonic, exact round-trips, display
units). 402/402 green; typecheck, lint, build pass.
Implements Option B from docs/research/graph-rendering.md. sigma.js v3
(WebGL) is replaced by one canvas, one rAF loop with a dirty flag, and
d3-zoom for the camera — eliminating the entire bug class from the
sigma-era bolt-on architecture:
- Hull/node desync during pan (two independent render loops) is now
structurally impossible: hull fills, dashed hull strokes, edges with
arrowheads, node discs, region labels, node labels, and hover glow
are all drawn in ONE frame under ONE camera.
- The settings-change canvas-sizing race (everything shifting up-left)
is gone: settings changes only redraw; the canvas and camera persist
(verified live: camera identical to 15 decimals across a slider drag).
- The GPU floor is gone: idle schedules NO frames at all (verified via
pixel-identity over 600ms idle); pan redraws exactly once per frame.
components/graph-canvas.ts: GraphCanvasRenderer class plus pure helpers
(zoomRatioOf, labelAlpha, fitTransform, arrowGeometry, pickNearest).
The sigma camera-ratio convention (1 = fit, smaller = zoomed in) is kept
verbatim so persisted labelZoom settings survive the swap; node labels
and cluster region labels cross-fade over the same LABELS_FADE_SPAN
(0.5, unchanged). Picking is a nearest-node distance check with the
10px pad that replaces the old padded-picking vertex shader. Hull math
stays in components/cluster-geometry.ts, reused as-is. No ctx.filter,
ever.
graph-view.tsx keeps every feature: fetch/refetch on runs-empty, FA2
run-then-freeze layout, localStorage render settings + sanitizers,
search filtering with edge drops and card-close, detail card with
flipped anchoring and per-source provenance, settings panel, import
button, pipeline status chips. Only the renderer plumbing changed.
tests/graph-canvas.test.ts pins the pure math: ratio direction, label
gate + inverse complement (alphas sum to 1), fit transform padding,
arrowhead tip-on-disc-edge and symmetry, picking pad/ties/null cases.
Live-verified end-to-end on the real 338-node graph (dev server
port 3002): single canvas, paint at fit, hover cursor+glow+fade, click
card open/anchored/close, stage click, search filter to zero with hint,
label gate opens via slider and zoom, cluster-labels toggle, zoom-to-
cursor 0.56px anchor drift, camera persistence across settings, zero
idle repaints. sigma dependency removed from package.json; d3-zoom and
d3-selection added.
Note: the settings feed effect needed isEmpty in its deps — without it
the renderer mounted with settings=null and every draw early-returned
(blank canvas); caught live, not by typecheck.
Three problems from the first cut (user report 2026-09-13), all rooted
and fixed:
1. Boundaries reshaping on zoom — an inward offset normal. In y-down
screen coordinates, monotone chain yields clockwise-on-screen hulls,
whose OUTWARD normal is (dy, -dx); the code used (-dy, dx), so the
14px padding pulled every hull vertex 14-20px INWARD. Zoomed in this
mostly passed; zoomed out, once a cluster projected smaller than ~2x
the pad, vertices crossed the centroid and the polygon self-
intersected — spiky garbage re-forming every frame. Geometry moved to
components/cluster-geometry.ts (exported, unit-tested) with the
corrected normal; tests pin the direction (offset moves every vertex
AWAY from the centroid; stays sane when the hull is smaller than the
pad; hull orientation asserted clockwise-on-screen).
2. GPU ~100% + audible coil whine on any interaction — the hull redraw
was hooked to sigma's afterRender, which fires for EVERY render
including ~a dozen hover-animation frames per hover, and each redraw
rasterized ~32 fills through ctx.filter blur(12px), a GPU-heavy
full-canvas filter. Now: redraws happen ONLY on camera updates and
resizes (hover leaves the hull canvas untouched — verified live),
and the blur is replaced with layered low-alpha fills (soft edge at
a fraction of the cost, no canvas filter at all).
3. Cluster labels cluttering the view — a persisted 'Cluster labels'
checkbox in the rendering settings (hulls stay, text toggles).
377/377 tests, typecheck, lint, build green. Live-verified: hover does
not repaint hulls, zoom does; far zoom-out yields 3 contiguous tinted
regions (no fragmentation); toggle clears/returns labels and persists.
Two custom canvas layers around sigma's own stack (DOM order: hulls
behind everything; region labels above nodes, below node labels).
Per cluster (vision section 1): convex hull (monotone chain) of member
viewport positions, offset outward 14px, rounded corners, a blurred
low-opacity fill (ctx.filter, graceful degrade to flat fill) plus a
dashed boundary stroke, and the LLM label at the centroid. Stable hue
per cluster id (content hash) — a region keeps its color across
reshuffles because the id only changes when the members do.
Geometry is a pure function of positions at draw time: every
afterRender re-derives hulls through the current camera, so pan/zoom/
relayout can never invalidate it (the boundary decision pays off: no
stored geometry, nothing to recompute after a future physics change).
The inverse gate: the cluster label layer's opacity is the exact
complement of the node-label layer's over the fade span of THE zoom
control (labelZoom, default 0.5x) — the two label systems never
coexist.
Live-verified in the browser: hulls painting behind edges; region
labels above nodes; zoom-in crossfades cluster 1 -> 0 as node labels
0 -> 1 (0.176 + 0.824 mid-fade); zoom-out restores; hull pixel count
changes with zoom (geometry follows the camera); zero console errors;
layers removed on renderer teardown. 372/372 tests, typecheck, lint,
build green.
Also named the real graph: one 11.5s labeler call minted all 32
region labels for the 338-node notes graph (Relational Databases & SQL,
Differential Forms, Sales as Uncertainty Reduction, ...).
The most suitable default is the stricter end — labels only once
zoomed in past 2x fit (user-decided 2026-09-13). The slider window
extends below it (0.25x) so the default is no longer the floor.
The label-visibility zoom threshold (was the LABELS_CAMERA_RATIO=1
constant) becomes the fourth persisted setting: labels appear when the
camera ratio is at/below it (1x = fit zoom; slider 0.5x-4x, shown with
an x suffix). Deliberately THE single zoom knob per the cluster design
(vision section 1): cluster labels will fade in over the same span as
node labels fade out, gated inversely on this same setting.
Live-verified: at a zoomed-out camera (labels previously hidden),
raising the threshold to 4x rebuilds and re-shows labels without any
camera movement; resetting restores the fade. 355/355 tests,
typecheck, lint clean.
Three sliders behind a gear in the search panel (user-decided
2026-09-13), persisted per browser in localStorage with clamped
sanitizing on load. Default node size dropped 8 → 6 for dense graphs.
Mechanics: the mount effect is split — the data effect builds the
graphology graph + one frozen forceAtlas2 pass per snapshot; the render
effect mounts sigma and re-runs on settings change only. Sizes are
stamped onto the same graph instance (layout never recomputed), and the
arrowhead program is constructed per rebuild with ratios solved from
the settings (head px = thickness × lengthToThicknessRatio × 2; wideness
keeps the stock 0.8 shape). The camera position carries across rebuilds
via a ref, so a slider tweak never re-fits or re-lays-out the view;
useDeferredValue smooths slider drags.
Live-verified in the browser: sliders persist to localStorage, the
renderer rebuilds with zero console errors, hover/picking survives the
rebuild, and a zoomed-out camera stays zoomed out across a settings
change (labels-gate opacity as the observable). 355/355 tests,
typecheck, lint, build green.
\ding{55} = U+2717 BALLOT X — I'd extracted U+2715 (\ding{53}, a
different multiplication cross) last round by mistake. Marks now match
pifont exactly: check \ding{51} (U+2713), x \ding{55} (U+2717).
The same extractor→auditor→merger pipeline now runs over raw personal
notes in arbitrary formats (vision §1, DECIDED 2026-09-13):
- NotesSource records (data/graph/sources.json, deterministic id from
path hash → idempotent re-imports) play the chatId role in mappings,
checkpoints, and observation events; usage lands on the source record
(appendSourceUsage, idempotent per startedAt, kept across upserts).
- mergeFindings is chat-store-free: callers pass MergeSource
{messages, foldedAt} — sessions pass the chat record, notes pass
messages:null (no quiz-event rebuild; a deterministic rebuild needs
structured quiz tool parts).
- Second extractor prompt (NOTES_EXTRACTOR_INSTRUCTIONS) for general-
purpose extraction; understanding judges the AUTHOR's grasp. Auditor
wording input-agnostic. extract/audit share one generic runSubmitAgent.
- graphSnapshot.fileSources (srcId→filePath); notes sources render as
static path entries in the detail card (FileTextIcon, never a link).
- One shared pipeline instance (exported from chat-handler): same
single-flight registry, live status chips (label = file path), usage
accounting, and true abort for both front doors.
- Transport: POST /api/graph/import (multipart, 3-wide worker pool) +
Import notes… button in the graph view; scripts/import-notes.ts for
batch runs (concurrency 4).
- real-data-extraction/ gitignored (raw import sources never committed).
355/355 tests; typecheck, lint, build green.
components/ui/glyph-mark.tsx: extracted vector outlines from the system
Zapf Dingbats font — U+2713 (LaTeX \ding{51}, the hand-drawn check) and
U+2715 (\ding{55}, the bulky cross) — as static SVG geometry on an
ink-bounded viewBox with a y-flip path transform (inverse of font axes).
This matches the pifont shape LaTeX renders, not a random glyph. Colors
stay: green/red like the verdict chips; the span keeps data-mark pins.
- Option rows: items-start → items-center — the icon span's top-misalign
came from the row alignment; now marks center across the row.
- The literal ✓/✗ look (owner preference over the round-3 lucide set)
re-rendered as hand-rolled SVG with thick rounded strokes (strokeWidth
3, round caps/joins) — the glyph shape, as a true vector, sized like
the row text. Test pins updated to data-mark=check|x.
The muted 'Why' box's px-3 double-inset with card p-4 — the W-label sat
deeper than the option-box edges. px removed (py-2 stays for vertical
air); the label now aligns with everything else on the left edge. The
rounded bg-muted box is bg-matched so its padding was invisible anyway.
- ✓/✗ in the answered card: replaced literal glyphs with lucide CheckIcon/
XIcon (strokeWidth 2.5) inside a fixed size-4 flex box — text elements
never carried the right size/vertical alignment, vectors do. Test pins
updated (lucide-check/lucide-x classes).
- All user-typed INPUT text now matches markdown output: lh-prose class
replaces the earlier font-prose (family-only) band-aid on the composer,
question-dock text/thinking/Other fields, home topic input, model search
box, and answered-card 'your thinking'/free-text records. lh-prose sets
family+size (16.5px) so placeholders inherit correctly.
- Home view: StatsBar under the composer (model+thinking control) — the
DOCK geometry matches the chat view (max-w-[46rem] px-4) so nothing
shifts when a session starts; pre-chat selection persists via deferred
save (ModelControl chatId-empty) + PUT after POST /api/chats.
- Answer marks (✓/✗): same visual size as row text, vertically centered;
colored green-500/red-500 matching the verdict chips.
- All user-typed inputs (composer, question-dock text/thinking/Other,
answered-card 'your thinking' and free-text records) now render
Source Sans 3 via the font-prose utility. Placeholders inherit the
family via the element.
- Answered-card explanation: markdown wrapper made truly inline so the
'Why:' label + the paragraph sit on one line — removes the oversized
leading gap.
- New session: literal '+' glyph removed — one lucide PlusIcon (the
duplicated glyph was PlusIcon + text '+').
- Top bar: a small pointer-events-none gradient under the header eases
the scroller into the bar exactly like the dock's bottom fade.
- Option subtext (opt.description): .lh-prose — Source Sans 3; 'I don't
know' copy stays JetBrains Mono.
- 'I don't know': now layout-matched with a radio circle; dashed border
preserved as the deliberate non-answer.
- Separator spacing: options group pb-1 → pb-2 so the gap before the
divider equals the 8px inter-option gap.
The plain user-text div renders Source Sans 3 too (.lh-prose) — the
teaching surface reads in one family, chrome labels stay JetBrains Mono.
Build green; gates clean. The reskin's final live-browser pass runs on
this tree (dev on 3001) — no screenshot tooling in this session, SSR
checked.
--text-xxs (10px) joins the ladder; every component-level text-[9|10|11px]
literal in owned components now pulls from the ladder (graph-view.tsx and
home.tsx untouched — graph stream). Cosmetic pins updated where touched.
COLUMN now spans the session area with a thin margin (px-6, no max
width); DOCK (the composer/question shell) is a deliberate narrower
46rem centered column — same elements, same places, width polish only.
- Session title: font-title (CMU Serif bold) at text-2xl, per the mock.
- MessageResponse's markdown container now carries .lh-prose (Source
Sans 3 + emphasis tokens) on every markdown surface; labels stay
JetBrains Mono. Unlayered plain CSS beats the text-sm utility.
- PhaseChip + PhaseDivider sizes now pull from the declared text ladder
(text-xs) instead of pixel literals.
- 'Learning Harness' wordmark → 'LH' (the owner's header in the mockup;
flagged as a copy change — it's visually the same brand mark).
- New session: + NEW SESSION row wired with one POST /api/chats then
navigate (the mock drew it as visual-only; POST already existed).
- Search: a SESSIONS label + inline input filtering the polled snapshot
client-side (title substring, no server round trip).
- Skin: sidebar stays bg-background with the edge #434343 border-r; the
selected row now carries the rounding + borders from the raised
surface #1C1C1C via accent tokens.
Live-driving the real browser caught it (the user's report: "they don't
work as buttons"): the stats row sits OUTSIDE the composer shell's
pointer-events-auto div, inside the sticky scroll wrapper's
pointer-events-none — every control on the row was unclickable, including
the pre-existing stats-detail popover button. The row now re-enables
pointer-events itself.
Also, per the user's sizing note: bar text 10px → 11px with a touch more
breathing room, and the model + thinking controls gain quiet pill
affordance (rounded-full border, card bg, ▾ chevron) — still muted by
design, but visibly buttons.
Verified live end-to-end in the browser: click opens the model menu ABOVE
(366 rows, search autofocused), "qwen flash" narrows to 5, picking
qwen3.8-flash persists + flips the label, the thinking menu shows exactly
that model's supported levels (Off/Minimal/Low/Medium/High), Medium
persists on the record via PUT, labels update. Test session settings
restored after the drive. Gates 350/350.
The model-control wave (user-decided design, 2026-09-12): ONE controller
for the conversation agents (prober/teacher are functionally one agent);
background sub-agents stay config-pinned. pi-ai owns the registry — the
shipped 366-model OpenRouter catalog (cost, context, modality,
thinkingLevelMap), getSupportedThinkingLevels/clampThinkingLevel for the
per-model thinking truth, and streamSimple's automatic clamp. No second
registry to drift out of sync.
Seams:
- config.ts: ReasoningEffort retired for pi's ThinkingLevel
(off|minimal|low|medium|high|xhigh|max). GLM roles go honest at "low" —
pi's catalog says GLM-5.3-flash accepts exactly low|high|max, and the old
"minimal" was silently clamped to low by streamSimple since the swap;
nothing changes behaviorally. visualMaker → qwen/qwen3.8-flash (fixes
the dead qwen/qwen3.8-max slug — the catalog only ships -0902; also the
user's cost pick, 0.15/0.47 per-1M).
- src/agent/models.ts: piEngineFor(role, settings?) — provider+id resolved
from the catalog, thinking level from settings ?? config, CLAMPED to the
model's supported list (a settings change between models can never send
an invalid level). PiEngine gains `level` (observability/tests).
- ChatRecord.settings {model?: {provider, id}, thinkingLevel?} — written
by PUT /api/chats/[id]/settings (replace-whole, no updatedAt churn),
read by chat-handler at turn composition: agents are stateless per turn,
so the change is next-turn-effective by construction. The turns log
still records the ACTUAL billed model (the honest witness).
- GET /api/models: the configured-provider catalog as client-safe DTOs
(core/contracts/models.ts) + config defaults; a second provider joins
the picker by registering it in piModels() — nothing else changes.
- PUT settings validation gate (src/server/model-catalog.ts): unknown
provider/model or unsupported level → 400 carrying the supported list,
never a silent clamp.
- scripts/sync-pricing.ts: regenerated PRICES/CONTEXT_LIMITS from pi-ai's
shipped openrouter.json (offline; same source as the engine + picker).
All 366 models priced; glm's stale 0.15/0.5 → pi's 0.075/0.25, limit
1310720 → 1048576 — cost is inferred at read time, so history re-prices.
- UI (components/model-picker.tsx): stats-bar right side becomes model +
thinking buttons; menus open ABOVE; fuzzy search over "provider id
name" (core/fuzzy.ts — pi's /model pattern); model rows show name/id/
price/context; the thinking menu lists exactly the chosen model's
supported levels (GLM: low|high|max — no dead options, no "off").
Model switch drops an incompatible pinned level (falls back to config,
which clamps honestly) rather than carrying a 400.
Tests (350/350, +15): catalog projection + defaults, the settings gate,
pi thinking truth pinned against upgrades (glm low|high|max; minimal→low;
off→low — GLM cannot disable thinking), the engine factory's
override/fallback/clamp/throw matrix, fuzzy ranking, store round-trip,
and the re-priced folds (usage, stats bar, activity dock).
Live smoke (disposable driver, deleted): catalog route 366 + defaults;
glm+minimal → 400 + supported; turn 1 billed qwen/qwen3.8-flash under
the override; mid-session switch flipped turn 2 to glm; clear-overrides
restored the config pin. ALL CHECKS PASS on real OpenRouter.
The custom-message scheme (user-decided 2026-09-12): system-authored
user-role messages are NOT human messages — they carry marker data parts
only, the adapter owns their model-facing wording, and the UI renders
them under control. Nothing fake is ever persisted as human speech.
The inventory (all migrated):
- probe→teacher handoff wake: was a text-bearing user message rendering
as a fake user bubble; now data-probe-handoff marker-only — the
adapter flattens it to HANDOFF_TEXT (core/contracts/chat.ts), the UI
renders a quiet 'Preparing your plan…' system line.
- plan accept/decline: was boilerplate text ('The plan is accepted…',
'I'd like the plan revised…') masquerading as learner speech — the
decline wasn't even marked; now data-verdict {accepted, at} on its own
message, adapter flattens to verdictText(), UI renders the quiet
verdict marker ('✓ Plan accepted' / '↻ Plan revision requested').
sendVerdict sends TWO REAL MESSAGES when the learner typed a note
(the note as a genuine user message, then the verdict) in ONE turn
via setMessages + sendMessage() — no 409 dance, no double teacher turn.
- sub-agent steers: the abort steer gains its data-subagent-aborted
marker part; the UI keys steer rendering off PARTS (artifact/aborted),
not metadata — metadata stays as pump mechanics only.
- record-adapter: systemTextOf() flattens marker-only messages; steers
keep their text (payload — briefs are content, not boilerplate).
phases.ts: plan→teach advances on data-verdict{accepted:true} only;
learner text alone can never sanction teaching (pinned). data-plan-
accepted retired, no back-compat (user-decided: wiped-data doctrine).
Pinned: record-adapter.test.ts (verdict/handoff flattening, note+verdict
order, steer payload kept, UI-only parts skipped), phases.test.ts
(verdict marker semantics, out-of-order, text-never-fakes), jobs.test.ts
(abort marker part), demos.test.tsx (badge renders off the part, not
metadata).
Live GLM smoke (disposable driver, deleted): probe→conclude→wake→plan→
decline-with-note (revised, still plan)→accept-with-note (teach) — ALL
CHECKS PASS, including marker-only handoff/verdict on the wire and zero
fake human speech in the transcript.
Gates: tsc, lint, build, 335/335.
The architectural answer to the validation-crash question: validation IS
first at the model-facing boundary (pi validates arguments before
execute; failures return to the model same-turn — all three live
incidents retried successfully). But the same bytes also exist UNVALIDATED
by design in two other places: the live wire streams raw tool-input
deltas DURING generation, and the transcript keeps the raw input of
REJECTED calls (honesty + the replay invariant). The consumers were
supposed to trust part STATES — but that trust was enforced by
TypeScript casts ('part.input as X'), which are compile-time lies with
no runtime check behind them. That is the hole both crashes came
through, and it should not have been possible.
The structural rule now: model-authored INPUT is consumed only through
parsers running the SAME zod schema the model faced — boundary-valid ⇔
consumer-parseable, mechanically. Server/learner-authored OUTPUT stays
trusted (our code authors it).
- src/core/tool-parts.ts (new): parseQuizInput (display parse over the
shared quizInputBase — strips the teacher-only nodeId, accepts both
prober and teacher boundary shapes), parseAskInput, parseProbeDoneInput.
- contracts/probe.ts: probeDoneInputSchema is now core-owned zod — the
probe_done tool declares it (single source of truth), the seam runs
the literal same schema.
- question-dock.tsx: the dock parses its input at entry; unparsable
renders the quiet malformed-question fallback, never a crash.
- probe-done-card.tsx: the input preview goes through the parse; the
old state reasoning and shape guards collapse into it.
Pinned in tests/tool-parts.test.ts: both exact live crash shapes
(stringified quiz options, stringified assessment), boundary-parity
cases for all three schemas, nodeId stripping, mid-stream partials;
render-cards pins the dock fallback markup.
Gates: tsc, lint, build, 328/328.
Two live bugs from the modal-realism stress runs:
1. Multi-select ask: picking the custom 'Other…' row cleared every
already-picked option, and picking any option cleared a typed custom
answer — single-select displacement logic applied to both modes. The
dock's selection is now a pure state machine in question-core
(toggleOption/toggleOther over DockSelection, unit-tested): single
displaces (unchanged), multi coexists — neither channel clears the
other; the typed text always survives.
2. ProbeDoneCard crashed on a REJECTED probe_done call: the model
stringified 'assessment' (the same double-encoding habit as the
options bug), zod rejected the call, the model retried — but the
card's input-preview fallback trusted the errored part's unvalidated
input shape and died on assessment.strands.map. The preview now reads
input only while the call is pending or streaming (guarded with
Array.isArray); an output-error part renders a quiet
malformed-and-retried note instead of the garbage.
Pinned: question-core.test.ts (3 dock-selection machine cases),
render-cards.test.tsx (4 probe-done card cases incl. the exact live
stringified shape, plus the multi-select ask markup pin).
Gates: tsc, lint, build, 315/315.
Two user-reported problems from the muscle-protein-synthesis session,
both diagnosed from the live data (chat_mtxeml9e_6118e59f).
The freeze: after probe_done, the open session never showed the
teacher's wake turn — only navigating away and back loaded it. Not an
agent-switch problem: the server-side handoff worked perfectly
(write-ahead persist, liveness registry, the sidebar's busy dot saw the
wake the whole time). The gap was client attach: the only mid-session
wake detector the open page has is the jobs poll, and probe-phase
sessions have zero job traffic, so that poll is OFF; the post-turn
adoption poll read turnInFlight=false at ~0ms (the wake fires at
~0.75-1.2s, after the pump's grace), adopted, and stopped. Fix: the
post-turn adoption effect now keeps a short WATCH WINDOW after adopting
(~4s, 8x500ms) — if turnInFlight flips true, it hands off to the
existing wake-adoption poll (busy shimmer, adopt at finish).
The mermaid failures: four failed plan_init calls, all caused by ONE
hidden rule — underscores are forbidden in node ids (mps_translation,
net_balance, per_meal). The id regex rejected '_' BEFORE the slug check,
so the specific, actionable message never fired; the generic 'can't read
the edge — expected a[title] --> b[title]' lied (the syntax was exactly
that), and the teacher spent three attempts hunting punctuation it
suspected (colons, commas, multi-word labels) — visible in its own
reasoning trail. Per the user's principle — enforce only the slugs,
free everything else: underscores are first-class slug chars; the id
CANDIDATE class is broad so every bad id reaches the specific slug
message; chained edges (a --> b --> c) expand to pairs; ==>, -.-> are
edge synonyms; any direction header accepted (we layout ourselves);
id["title"] quote pairs are stripped. The tool description, zod
describe, and the teacher's planning prompt now state the one strict
rule instead of the old subset liturgy.
Verified: tsc, 305/305 (the exact muscle-protein mermaid is now a
passing test), lint, build; real-browser puppeteer smoke on live GLM —
the teacher's wake turn appeared in the open page ~50s after the probe
concluded with ZERO navigation, verdict gate + first teach check +
plan window all live in-page (the single console 404 is the app's
missing favicon, environmental noise).
The accept-plan UI lands (docs/probe-teach-split.md §4, formerly the
interim rule): presenting the plan no longer moves the phase — the
learner's ACCEPT does. While the presented plan awaits its verdict, the
composer's send square becomes two stacked buttons (green Accept plan /
red Decline); typed text rides the verdict as his note, Enter keeps
sending plain side questions (phase unmoved), decline asks for a
revision and the buttons stay.
The seam: accept sends a user message carrying a data-plan-accepted
part (PlanAcceptedData in contracts/chat.ts, TeacherUIDataParts
'plan-accepted'); phaseAt3 reads it as the plan→teach event (plan_init
demoted to presentation-only); convertToModelMessages drops data parts,
so the teacher sees only the text. Mid-lesson rewrites need no fresh
verdict — acceptance happens once, at the first presentation.
The teacher's planning prompt now ends the turn at presentation and
waits for the verdict (never teaches into an unaccepted plan).
Gates: tsc clean, 304/304 (phases tests rewritten to the acceptance
seam incl. decline/side-question/failed-init cases; composer verdict
render tests), lint, build. Live GLM smoke ALL PASS: phase pinned at
'plan' after plan_init, presentation turn carried NO check, accept
click flipped the summary to 'teach', then tagged checks moved the map
(current=rates, visited=composite); zero console errors.
The successor of the injected plan blocks (docs/probe-teach-split.md §6):
always on once a tree exists, a zoomed-in window (2:1, ~2¼ node widths)
centered on the CURRENT node, re-centering by pure derivation as tagged
checks move the lesson — statuses derive live from the transcript on
every render (derivePlanStatuses), glow on current, fallback focus on
the lesson's first node, click opens the existing full-DAG popup.
Bottom-left, mirroring the activity dock's bottom-right; hidden on
narrow viewports; the learner's visual polish pass comes later.
PlanDiagram gains a viewBoxOverride (exported); latestTree exported.
Tests: viewBox centering/clamping (pure) + render (hidden pre-plan,
windowed viewBox, glowing current, starting fallback).
Diagnosis (2026-09-11 user testing, minimal-effort GLM): sessions stuck on
'plan' forever. Two causes: (1) the three-phase view read the stored tree's
currentNodeId, which nothing ever writes post author-once (2026-09-03) — a
structural dead seam; (2) the teacher stochastically left quiz.nodeId
untagged, and done-by-quiz-result semantics would have falsely completed
nodes anyway.
The redesign (docs/probe-teach-split.md) abolishes derived occupancy in
favor of explicit events:
- Two agents over one transcript: createProberAgent (quiz without a
nodeId field, ask, probe_done) and createTeacherAgent (full toolset,
plan_init onward). The chat-handler construction branch keys on a
probe_done part in the transcript. MODELS.prober added.
- probe_done: server-side seam tool — carries the learner assessment
(strands + free-form edge read), refuses while a question is open or
the probe is already concluded, and queues a handoff steer through the
generalized wake pipeline (steers now dedupe by id, not jobId; job
finalization only for job steers). The teacher auto-wakes and authors
the plan; the learner sees the assessment via the probe-done card.
- phases: probe ends at a concluded probe_done, plan ends at a
successful plan_init — strictly sequential, no skipping, no legacy
compatibility (data wiped at the pivot per doctrine).
- Plan map = position, not completion: derivePlanStatuses reads only
tagged quiz CALLS (state/outcome feed nothing); current = latest
tagged node with consecutive duplicates collapsed, visited = earlier
distinct stays (a revisit stays in both — current wins at render).
PlanTree is structure-only; currentNodeId/doneNodeIds and the dead
mutation helpers are gone. No fallback current.
- Prompts split per agent (prompts/prober/, prompts/teacher/ over the
trimmed shared base); graph-context injection removed entirely
(shelved, docs/probe-teach-split.md §5); knowledge-graph context no
longer reaches either agent.
- Plan blocks are full-only snapshots at plan_init (neighborhood
machinery retired; the persistent DAG window is the future UI wave);
usage capture unchanged.
Gates: tsc clean, 294/294 tests (phases/plan-tree/plan-blocks/question-
tools rewritten to the new semantics; probe-done + handoff-wake tests
added), lint, build. Live GLM smoke PASS: prober concluded with an honest
assessment, teacher auto-woke, authored a 10-node plan with the block
attached, then tagged checks on slope-instinct → secant derived current/
visited exactly as designed; grading honest both ways (driver off-by-one
proved a wrong answer grades false).
- src/core/plan-blocks.ts: pure emission builder — full block on successful
plan_init, neighborhood block when the derived plan state moved since the
newest existing block; the as-of state reads from the block's frozen
snapshot (transcript quiz parts mutate in place on answer, so
re-derivation is post-mutation blind). Idempotent by construction.
- turn-service persistTurn enriches with withPlanBlocks at the canonical
write; chat.tsx adopts the record once the server agrees the turn is
done (endTurn flips only after persist).
- chat-handler: per-request usage collector via agent-level onStepFinish
(StepResult.usage), appended at onFinish to ChatRecord.turns via
appendTurnUsage, idempotent per response message id.
POST /api/activity/abort landed on main (fde46c2). 404 not_found /
409 not_running mean the process reached the desired end state on its
own — refresh and clear the abort state, no error surfaced. Genuine
failures (network/400) show 'Abort failed — try again' on the blob.
The plan now lives IN the chat (plan blocks, wave-4 item 3) and background
processes live in the activity dock (item 1), so the right sidebar's
tree panel + sub-agent fleet column is retired from the chat view:
- delete components/tree-panel.tsx (three-mode rail/list/graph panel) and
components/sub-agents-panel.tsx; their graph interaction machinery lives
on in plan-block.tsx and fleet observability in activity-dock.tsx.
- app/layout.tsx drops TreePanelModeProvider (the mode no longer exists).
- chat.tsx drops the xl:flex right column; the middle column is the view.
- tests: render-tree-panel.test.tsx deleted; the sub-agents panel suite
removed from demos.test.tsx (dispatch cards' jobs-context stays — the
central poll drives transcript dispatch cards).
- components/plan-block.tsx: hand-built SVG (user decision) — deterministic
layered layout (Kahn topo + longest-path depth, rows centered, authoring
tie-break), bezier edges, the retired panel's status color language.
- PlanBlock renders data-plan-block parts AS CARRIED (frozen snapshots,
never re-derived): kind full = borderless, viewBox = layout extent so
nodes hug the column edges, natural height; kind neighborhood = own
small labeled 'Plan fragment' container with the current node glowing
(pulsing primary halo).
- PlanPopup: full-screen overlay with the LIVE plan — latest tree from the
transcript, statuses derived at click time via derivePlanStatuses
(contracts/plan.ts). Esc / backdrop / X close; drag pan, wheel
zoom-to-cursor, zoom buttons; fit-floor semantics harvested from the
retired tree panel (zoom floor = the fit, pan locks at it).
- chat.tsx: data-plan-block case in the part switch + popup mount.
- src/core/ui-message.ts: TeacherUIDataParts gains "plan-block": PlanBlockData
(additive, type-only — lane touch flagged to master).
- tests/render-plan-block.test.tsx: pure layout (layering, centering,
dangling-edge tolerance), wrap, frozen-snapshot render, live derivation.
Wave 4 (agent-side observability + control), reconciled with the dock
contract (master relay 2026-09):
- abortJob in src/server/jobs.ts, exported through the server barrel for
POST /api/activity/abort (master's thin route): fires the job's
AbortController (real kill — the in-flight model call aborts, not just
the next loop check), drops any queued result steer, flips the record
to error "Aborted by learner" + activity "aborted" synchronously, and
queues a one-line abort steer (buildAbortSteer) through the same wake
pipeline so the teacher's promise doesn't hang in the lesson. Shares
the result steer's deterministic id space, so abort + racing result
can never both deliver (steerDelivered dedupe).
- Abort registry (src/agent/subagents/aborts.ts) on globalThis, mirroring
the wake pipeline's module-state pattern; runner registers/unregisters
per run, so the route's module instance sees the loop's controller.
- Runner usage capture: LoopContext (abortSignal + onUsage) threads into
all three kind loops; per-step usage folds via accumulateJobUsage into
JobRecord.usage (model from config MODELS, absent-never-zero), flushed
in runJob's finally so an aborted job's money record survives the kill.
- Contracts: JobUsage token fields optional + lastStep (most recent
call's accounting, for the dock's per-blob context line vs
CONTEXT_LIMITS); SubagentResultMeta.aborted; AbortSteerMessage;
buildAbortSteer; SteerMessage union generalized.
- demo-builder/visual-maker accept abortSignal + onUsage (visual folds
generateText usage per iteration).
- stillRunning/finishJob/jobContext guards: an aborted job is never
overwritten by the runner (terminal no matter what the wake does);
failJob and the pump's finalizeJob keep the flip.
- UI: abort steer renders a quiet aborted chip (job-aborted-badge).
- Prompt 20-jobs.md: one line about aborted jobs.
Tests: accumulateJobUsage folds (undefined-preservation, lastStep),
runner usage capture, real-kill abort (sync flip, silent unwind,
abort steer wakes), usage-so-far survives the kill, aborting a
delivering job drops the queued result steer, outcome reasons,
abort-chip render. 330/330, typecheck/lint/build green.
One quiet row beneath the composer/question shell (not flush to the
screen bottom; static height, outside the morphing shell):
- LEFT: context window + session cost, clickable → per-turn detail
popover (context, total, unpriced count, one row per turn with
model/steps/cost). All folds from core/prices.ts — sessionCost,
contextWindow, turnCost — no cost math in components.
- RIGHT: model + "Thinking —" — a placeholder slot for the coming
model/thinking-level CONTROL (later work with its contract changes);
display-only today, model read from the last turn's usage,
pretty-printed (Glm 5.3 Flash).
- Data: the record's turns log, seeded on mount, refreshed when the
local stream settles, kept fresh by the existing record re-syncs.
No turns yet → "—" everywhere; unpriceable turns never fold into a
fake $0 (the doctrine).
- formatUsd/formatTokens moved to components/usage-format.ts (shared
with the activity dock); prettyModel joins them, pure + tested.
One reserved corner of the shell, one blob per running BACKGROUND
process — session sub-agents (research/demo/visual) and global
extraction runs. Teaching turns are deliberately NOT here: the dock
exists to surface what the learner can't otherwise see; a running
teaching turn is already fully visible where it happens (user decision).
- Data: ONE poll of GET /api/activity (jobs across ALL chats,
title-joined, oldest-first + extraction runs), folded client-side
with core/prices.ts (jobCost). Adaptive interval — 2.5s while
anything runs, 10s idle, 4× slower on hidden tabs; a failed fetch
keeps the last feed (no flicker to empty on a blip).
- Per blob: kind icon, elapsed (ticking), cost, activity line, and an
explicit END on the blob's face. Click → detail popover (context
line, model, steps, open-session link). The context line is the LAST
model call's tokens vs the model's limit (JobUsage.lastStep — pending
agents-stream contract; "—" until it populates), NEVER a cumulative
sum. Absent data renders "—", never zero (the doctrine).
- Header: total running cost (sum of priced blobs, "—" when nothing
is priced). Narrow viewports collapse to a count badge → drawer.
- END posts to /api/activity/abort {kind, id} — the backend is being
composed by master over the streams' mechanisms; until it exists a
click locks the button and the popover says "Abort not available
yet" (never a dead control).
- Idle renders NOTHING. Mounted once in the root layout; every view
gets it for free.
toBlobs / formatElapsed / formatUsd / formatTokens are pure + tested;
SSR render tests pin blobs, the "—" doctrine, the face END, and the
priced total.
Wave 3: the plan protocol collapses to one re-callable mermaid plan_init
(seven mutation tools deleted by design; statuses derive from quiz checks;
live quiz-nodeId validation with mid-turn retry). The steer-starvation arc:
steers deliver coalesced with the learner's answer (claimSteers), persist
dedupes same-id continuation copies, jobs settle-sync defers while a turn
is busy. Research steers gain the collapsed full-brief affordance. Model
reasoning effort set to minimal across roles.
With continuation coalescing, a job flips done at CLAIM time — while the
learner's own answer turn is still streaming. The poller's settle re-sync
fired on the flip, swapping in a mid-turn record snapshot mid-stream; the
steer after the assistant message broke the SDK's in-place continuation
merge, and the streaming response landed as a SECOND message with the same
id — duplicate React keys in the live transcript (the user's live test hit
it; the record itself stayed clean).
A settle during a busy turn (local stream OR server turnInFlight) now marks
a pending sync; the first idle poll tick adopts the finished record. This
also fixes the latent multi-job race: steer B settling while steer A's wake
turn is in flight would have grabbed the same mid-turn snapshot.
Out-of-lane surgical touch (flagged for master review): the wave-1 poller
block in components/chat.tsx.
Key-convention policy, settled: every field accepts ⌘/Ctrl+Enter
(metaKey || ctrlKey — Mac gets ⌘↵, Windows/Linux Ctrl↵, the Gmail
convention); plain Enter stays matched to the field's species —
sends in message fields (chat composer, free-text answers — the
universal chat convention, Shift+Enter still a newline), newline in
the thinking field (composition, for dumping).
- The learner's own typed Other answer now renders INSIDE the options
container in the answered card, styled exactly like its selected
siblings (border-primary bg-accent) — it is an option, not a loose
quote floating outside the list. Quotes keep the learner's words.
- The thinking field submits with ⌘↵ on macOS, Ctrl↵ elsewhere
(metaKey || ctrlKey — the Gmail convention, same handler on every
platform). Plain Enter stays a newline: the field is for dumping.
A quiet "⌘/Ctrl + ↵ submits" hint sits next to Submit for
discoverability (text mode keeps Enter-to-submit, no hint).
Some labels (clustered nodes: Flux, The signifier rules the subject,
The body as window onto the thing-in-itself) appeared later in zoom than
others, without fade. Root cause: sigma's label grid — viewport cells
of labelGridCellSize (100px default) compete, only ceil(labelDensity /
ratio^2) winners per cell draw (one at fit with default density 1) —
so clustered nodes' labels were culled until zoom changed the quota,
then popped in with the global fade already complete.
labelDensity: MAX_SAFE_INTEGER turns the quota off. The camera-ratio
gate (LABELS_CAMERA_RATIO + LABELS_FADE_SPAN) is now the ONLY label
culling: every label appears at the same zoom with the same fade —
the wave-1 'all labels at once' intent, finally true.
Verified pixel-level at fit view: all 31 node labels render, including
the three previously-missing ones; no console errors.
The note was the transfer channel of the whole product presented as an
afterthought: an unlabeled one-line slot whispering "optional". Now:
- A labeled composer-TWIN field ("Your thinking") between the options
and Submit, docked with the submit button inside it exactly like the
chat composer's send. The placeholder invites dumping ("Why this
answer? What are you unsure about? Say as much as you like — the
teacher reads all of this."); the word "optional" is banished.
- Enter makes a NEWLINE in the thinking field (it is for dumping, soon
dictated); the button submits. Text-mode answers keep Enter-to-submit.
- Phase-scaled prominence: teaching = a generous dump area, probing =
one quick row (threaded from the session phase via DockOverlay).
- "Other…" (ask questions) is now an editable OPTION ROW — radio circle
that fills on selection + inline input, styled like its siblings — so
picking Other never displaces the thinking field; typed text survives
deselection.
- The answered card promotes the thinking to a quoted first-class
block above the verdict, labeled "Your thinking" — the transcript
reads as a dialogue of thinking, not a buried "Note:" footnote.
The frozen core is untouched (the teacher-facing "Note:" transcript
line in question-core.ts is protocol text, flagged to master).
amosblomqvist