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show-earlier backfill
Re-pinned [email protected]>0.10.0 + [email protected]>0.6.1 (reply
frontend-history-windowing-handoff.md); re-mirrored both .dispatch references.
- HistorySync port gains optional { limit?, beforeSeq? } (CR-5 params); the
app's createHistorySync appends them to GET /conversations/:id.
- COLD-cache fresh load now fetches ?sinceSeq=0&limit=<floor(0.75xL)> — a huge
conversation no longer ships whole to show 192 chunks. A warm-cache tail sync
stays unwindowed (windowing a tail that outgrew the limit would leave a
silent seq gap behind the cache).
- hasEarlier now derives from the [email protected] CONTRACT (1-based gap-free seqs):
loaded window starting above seq 1 => older history exists — covering both
locally-trimmed AND server-windowed transcripts (the watermark stays as the
merge floor only).
- showEarlier(): local cache first; when the cache doesn't reach far enough
back, backfills the missing older run via ?beforeSeq=<oldestKnown>&limit=
and persists it (next page-in is local). latestSeq windowed-read caveat is
satisfied structurally (tail cursor derives from the cache's max seq).
- live-probe: +6 CR-5 checks (seq origin, newest-k ascending, short-chat
exactness, beforeSeq paging, 400 validation x2). NOT yet run live — backend
was down at commit time; run pending.
- backend-handoff.md: CR-5 RESOLVED, pins/mirrors current. 602 tests green x2.
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show-earlier page-in
Long transcripts no longer grow unbounded: past the chat limit (default 256
chunks, localStorage dispatch.chatLimit) the oldest ceil(limit/4) committed
chunks are unloaded in ONE bulk pass — never one-per-delta (old Dispatch's
scroll-jump-per-step bug) — and only while the reader is stuck to the bottom
(scrolled-up readers defer the trim; it catches up in whole quarters). A fresh
page load windows to the newest floor(0.75*limit). Unloading is purely local
(IndexedDB cache + server keep everything); a hiddenBeforeSeq watermark keeps
history merges from resurrecting unloaded chunks, and a 'Show earlier messages'
affordance pages a quarter back in from the cache with scroll-anchor
preservation. Thinking-collapse render keys stay stable across trims via a
hiddenThinkingCount ordinal base.
- core/chunks/trim.ts: pure policy (trim/window/restore/normalize) + tests
- chat store: chatLimit + canUnload deps, windowed load, showEarlier()
- composition root: dispatch.chatLimit localStorage knob + unload gate wired
to smart-scroll isAtBottom()
- backend CR-5 OPENED (not a blocker): ?limit=/?beforeSeq= on
GET /conversations/:id (courier backend-handoff-chat-limit.md)
- scripts/live-probe.ts: fix pre-existing stale TurnMetricsEntry reads
(m1.usage -> total.usage) that crashed the probe; 17/17 live checks pass
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Consume [email protected] / [email protected] metrics: usage.stepId,
step-complete (ttft/decode/genTotal), done.durationMs/usage, and the
durable GET /conversations/:id/metrics endpoint.
- core/metrics: pure live-fold + durable-merge reducer; decode-rate TPS;
head-aligned, stable placement; progressive per-step rows (each shown as
its step ends) with the turn-total row gated on the done event.
- features/chat: store folds metric events + hydrates durable TurnMetrics;
ChatView renders inline step bubbles + a turn-total bubble.
- app: MetricsSync HTTP effect (tolerates 404) injected into chat stores.
- scripts/live-probe: drives the metrics path; live-verified 17/17 vs bin/up.
- docs: regenerate .dispatch wire/transport mirrors to 0.4.0; glossary terms
(turn/step metrics, TTFT, decode time, TPS, metrics bubble); trim handoff.
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This reverts commit 48c6d85c3cc5a57a729f14068e2346b17ed62088.
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Consume wire/transport-contract 0.3.0 (step-complete event + timing
fields on usage/tool-result/done). Pure core/telemetry module:
foldMetricEvent (reducer) + derived selectors (stepTps, turnTps, etc).
TelemetryState is pure data, no active-turn tracking — consumers pass
turnId to selectors. ChatStore wires foldMetricEvent into handleDelta
and exposes telemetry + currentTurnId. ChatView shows step-metrics
footer (time/TPS/tokens) on assistant text bubbles and durationMs badge
on tool cards. New TurnSummary component renders turn-level stats
(wall-clock, tokens, steps, TPS) in a DaisyUI stats block. Extended
live-probe to verify telemetry events against bin/up (pending backend
restart). 336 tests, typecheck 0, biome clean, build ok.
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Extend scripts/live-probe.ts with a second turn that elicits parallel
tool calls and asserts: live tool events carry stepId, replayed chunks
carry chunk.stepId, and groupRenderedChunks folds the batch identically
live and on replay. Deltas now routed by conversationId. Gated (not in
bun run test). Verified 13/13 against bin/up.
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- scripts/live-probe.ts: gated bun harness driving the real FE stack
(adapters/ws + core/chunks + conversation-cache + adapters/idb + HTTP
history) against bin/up; not part of `bun run test`
- backend-handoff.md: record the 9/9 live result; no backend mismatch
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