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Summarize a conversation's older "head" into a structured anchored Markdown
summary while preserving the most recent turns verbatim, shrinking context size
while keeping the information needed to continue coherently. Triggered by a
"Compact conversation" button in Chat Settings (not an agent tool).
Approach informed by OpenCode's session/compaction.ts:
- Ported SUMMARY_TEMPLATE (Goal / Constraints / Progress / Key Decisions /
Next Steps / Critical Context / Relevant Files) and the anchored-summary
buildPrompt (re-summarizes a prior summary when present).
- Ported the TOOL_OUTPUT_MAX_CHARS (2000) cap on tool results in the summary
request.
- Simplified tail selection to a fixed recent-turn count (DEFAULT_TAIL_TURNS=2)
instead of OpenCode's token-budget splitTurn.
core:
- New src/compaction/ module (pure, DB-free): template, prompt builder,
head/tail selection, transcript renderer with tool-output capping, prior
summary extraction. Generic over ChatMessage so callers keep turnId/seq.
- db/chunks.ts: rekeyChunks(from,to) relocates a tab's full history to a
backup tab (reversible — nothing is deleted).
- AgentEvent: compaction-started / -complete / -error variants.
api:
- AgentManager.compactTab(tempTabId, sourceTabId): side-effect-free
resolveConnection() for the compactor model (configured compaction_model_*,
else the source tab's own key+model), one-shot tool-less summary generation
via a transient Agent, then relocate full history to a fresh backup tab and
re-seed the canonical source id with [summary turn + preserved tail]. Source
tab is locked (messages queue) during the run; queue drains afterward.
- Routes: POST /tabs/:id/compact, GET/PUT /tabs/settings/compaction-model.
frontend:
- "Compact conversation" button in ModelSelector (Chat Settings), between
Working Directory and the agent toggle; idle-gated.
- Compaction-model key+model selector in Settings, beside the title model.
- Transient placeholder tab shows a large, non-faded "Please wait, compacting
conversation…" screen; closing it cancels. Source input locked while running.
- Handle compaction-* events: reload compacted source, insert backup tab,
refocus source, discard placeholder.
tests: core compaction unit tests, rekeyChunks DB test, AgentManager.compactTab
orchestration tests, and compaction route tests. All green (713 tests), biome
clean, all typechecks pass, frontend builds.
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- TabBar: HTML5 drag-and-drop to reorder user tabs (subagent tabs untouched);
double-click a tab title to rename (Enter/blur confirm, Escape cancel).
- Store: add reorderTabs/renameTab/setDraft; per-tab in-memory `draft` and
`manualTitle` fields. Manual rename suppresses first-message auto-title.
- ChatInput: bind to the active tab's draft so switching tabs saves/restores
unsent text instead of clobbering it.
- Backend: updateTabPositions() + PATCH /tabs/reorder persist tab order to the
existing `position` column; tabs without a stored position fall to the end
then get explicit positions on first reorder.
- Tests: store reorder/rename/auto-title-guard/draft coverage; core
updateTabPositions coverage (FakeDatabase extended with transaction support).
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Addresses the live-accumulator overshoot a Gemini review surfaced: the
frontend adds every streamed usage event to cacheStats, but a rate-limited
fallback attempt's usage is discarded server-side (never persisted). Live
numbers overshot until a reload re-seeded from the DB aggregate.
Fix: turn-sealed (emitted AFTER the atomic usage-row write) now carries the
authoritative getUsageStatsForTab aggregate. The store REPLACES (not adds)
cacheStats with it every turn — landing the just-sealed turn's usage AND
self-healing any live drift, including the discarded-fallback overshoot. No
extra round-trip (piggybacks turn-sealed); idempotent in the happy path.
- core: add UsageStats type; getUsageStatsForTab returns it; turn-sealed gains
optional usageStats field.
- api: agent-manager reads getUsageStatsForTab post-flush and attaches it to
the turn-sealed emit (try/catch: omit on DB error).
- frontend: turn-sealed handler replaces cacheStats (undefined ⇒ untouched
back-compat; null ⇒ clear).
Tests: frontend reconcile/self-heal/back-compat/null-clear; api turn-sealed
carries aggregate. 509 -> 514 passing; typecheck + biome green.
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Persist usage as invisible type:"usage" chunk rows (side channel):
- core: add "usage" ChunkType + UsageData; exclude usage rows from
getChunksForTab/getTotalChunkCount; add getUsageStatsForTab aggregate
(exported from barrel); defensive skip in groupRowsToMessages.
- api: agent-manager accumulates per-attempt usageRows and flushes them in
the same atomic appendChunks call as the turn's content (discarded on a
superseded fallback attempt). GET /tabs enriches rows with usageStats.
- frontend: hydrateFromBackend seeds cacheStats from usageStats (reload only;
no re-seed on statuses reconnect, so no double-count with live events).
Tests: core DB-backed usage persistence/aggregate; api usage-row-per-event +
fallback discard; routes GET /tabs usageStats; frontend hydrate seed +
no-double-count + live-accumulation-after-seed. 495 -> 509 passing.
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same-tick fires
Marking an hour on the Claude Wake Schedule panel now schedules FOUR probes
within that hour instead of one. Rate-window edges are unforgiving — a
single probe at :15 can miss the actual reset moment by up to 14 minutes;
hitting :00 / :15 / :30 / :45 puts us within ~7 minutes of any reset that
happens during that hour.
When multiple slots come due in the same 30s scheduler tick (or recover
together at boot), they coalesce into a SINGLE upstream wake call — no
point hitting Anthropic 4× in the same window.
DB schema
- wake_schedule is now (hour, slot_minute, next_wake_at) PK (hour,
slot_minute). Destructive migration: detect old single-row-per-hour
schema by absence of the slot_minute column and DROP TABLE. No other
table is touched. Per user direction: no back-compat for old rows.
API
- POST /models/wake-schedule/toggle add: { hour, timestamps: { '0': ms,
'15': ms, '30': ms, '45': ms } } — all 4 slots required, all must be
future Unix ms. Delete shape unchanged ({ hour }).
- GET /models/wake-schedule shape:
schedule: { '9': { '0': ts, '15': ts, '30': ts, '45': ts }, ... }
probeSlotMinutes: [0, 15, 30, 45]
resetOffsetHours, lastWake, pendingRetry (unchanged from prior commit)
Frontend
- Computes 4 timestamps client-side (next occurrence of HH:MM in local TZ)
and sends them in one request.
- markedHours summary now says 'Probes :00 :15 :30 :45 → reset by ~Xh later'.
- Same in-flight tracking / current-hour ring / status row as before.
Tests
- wake-scheduler.test.ts unchanged (pure helpers still correct; added
PROBE_SLOT_MINUTES + isProbeSlotMinute exports).
- routes.test.ts rewritten for the new payload shape: 12 wake-schedule
tests covering snapshot shape, add/remove (full 4-slot round-trip),
validation (range, integer, past-slot, missing slot, non-object,
missing timestamps), independent multi-hour scheduling, and
re-toggle replacement. 417 tests total (was 414).
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Add send_to_tab / read_tab tools so an agent can message or read another
tab by a git-style short handle (shortest unique prefix of the tab UUID,
min 4 chars), shown in the tab bar.
- core/db/tabs: resolveTabPrefix + shortestUniquePrefix (open tabs only,
LIKE-sanitized prefix matching)
- new tools read-tab.ts / send-to-tab.ts (+ tests) decoupled from the DB
TabRow via a minimal ResolvedTabRef projection
- agent-manager: unified deliverMessage routing (busy -> queue, idle ->
new turn) shared by POST /chat and send_to_tab; agent->agent auto-wake
budget (MAX_AGENT_AUTO_WAKES) to bound ping-pong loops
- summon/loader: send_to_tab + read_tab as grantable tools
- frontend: shortHandleFor + handle badge in TabBar; perm toggles
- notes: tab-comm / user-agents / todo-redesign plans
- chore: biome format fixes (debug-logger, summon.test)
Refs notes/plan-tab-comm.md
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Move all loose root-level .md files (plans, reports, gemini reviews, incident
notes) into a single notes/ directory, and update the doc-reference breadcrumbs in
code comments/test labels to the notes/ path.
Add notes/queue-interrupt-reconcile-edge-cases.md: documents why the
queue/interrupt/turn-sealed reconcile path keeps surfacing edge cases (a catalog of
the four review-pass bugs, the no-loss/no-duplicate invariants, the recommended
membership-based reconcile refactor, and interleaving-test guidance).
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per-chunk eviction
Replace the stored ChatMessage[] with a chunk-native model: tab.chunks (sealed
ChunkRow[]) + tab.live (transient in-flight turn buffer) + derived tab.renderGroups.
This enables per-chunk eviction (trimming WITHIN a large turn) and raw-chunk
pagination (loadOlderChunks), removing the whole-message eviction limitation.
Backend:
- Emit turn-start/turn-sealed around each turn; expose currentTurnId in the status
snapshot. turn-sealed fires after the durable write (status:idle fires before it).
- New GET /tabs/:id/chunks raw paginated endpoint (limit/before).
- Wrap appendChunks in a single SQLite transaction.
Frontend:
- turn-sealed drives a turn-aware reconcile that folds the sealed turn into chunks
while preserving a concurrent newer in-flight turn and pending queued messages;
deferred while the user is scrolled up.
- Stable turn-scoped render keys (${turnId}:${role}:${n}) avoid remount/flash.
Reconcile correctness (three review passes):
- preserve a concurrent newer turn when an earlier deferred reconcile flushes;
- keep optimistic queued user messages (no loss);
- turn-start backfill skips pending queued rows and tags only the turn initiator;
- bind consumed interrupt messages to the in-flight turn so they collapse on seal
(no lingering/duplicated bubble).
Tests: chat-store reconcile/eviction/pagination suite; api chunks endpoint + events.
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Replace the message-as-container model with a flat, append-only chunk log.
- chunks table (id, tab_id, seq, turn_id, step, role, type, data_json): one
row per chunk; tool_call (assistant) and tool_result (tool) are SEPARATE
rows linked by callId. Message/turn are derived groupings, not stored.
- chunks/transform.ts: DB-free explode (Chunk[] -> rows) / group (rows ->
messages), shared by backend and the browser frontend.
- Cache fix: toModelMessages segments each turn at tool-batch boundaries into
stable [assistant, tool] pairs per step, so earlier steps serialize
byte-identically across requests (kills the prompt-cache churn).
- agent-manager persists a turn's chunks on seal (once), discarding a failed
fallback attempt's partial chunks; rebuilds agent history from the log.
- GET /messages windows the log by chunk seq then groups; loadMoreMessages
merges a turn split across the window boundary by turnId.
- One-shot migration drops the legacy messages table and clears tabs;
settings/credentials/keys/usage preserved.
Full suite green (317 tests); biome, tsc, and svelte-check clean.
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backend pagination
Frontend keeps only a bounded window of chunks in memory (configurable via
settings slider, default 100). Older messages are evicted when at the bottom
and re-fetched from the backend on scroll-up.
- Backend: paginated GET /tabs/:id/messages with ?limit=N&before=seq
- Store: evictMessages trims oldest messages until total chunks ≤ limit
- Store: loadMoreMessages fetches next page and prepends with dedup
- ChatPanel: smart scroll hooks trigger eviction on return-to-bottom
- ChatPanel: onNearTop loads older history with scroll-position maintenance
- Settings: chunk limit slider in Memory section
- Fix: oldestLoadedSeq recalculated after eviction (pagination cursor stays valid)
- Fix: seq preserved on ChatMessage for cursor tracking
- Fix: scrolledUpTabs cleaned up on tab switch (no memory leak)
- Fix: evictMessages reads appSettings.chunkLimit directly (live updates)
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tool of batch
The interrupt block embedded in a tool-result was persistent in the
assistant message history, so the imperative 'You MUST address these
before continuing' got re-evaluated as fresh on every subsequent LLM
step. Result: the model repeatedly thought about and re-acknowledged
the same interrupt 5-10+ times per chat (verified in production DB
traces — e.g. tab 4c5727aa had 11 thinking chunks quoting a single
interrupt verbatim).
agent.ts (toModelMessages): strip [USER INTERRUPT] from every tool-
result except the one in the freshest tool-batch (last chunk of the
last assistant message, which itself must be the last message). The
strip is a serialization-time transform only — this.messages, the DB
row, and the UI display all keep the full text. The LLM sees the
imperative exactly once: the step immediately after injection.
agent.ts (tool execution loop): batch queued messages across the
group's tool calls and inject them only into the LAST executable tool's
result. Previously the first tool to dequeue won; now the interrupt
lands in a single deterministic spot regardless of timing. Tool-level
handlers (run-shell/youtube/retrieve) are untouched — they still embed
their own interrupt text when they background work.
Also fix pre-existing tabs.test.ts: it referenced a getDescendantIds
function that didn't exist (added: BFS, leaf-first, cycle-safe, skips
archived) and imported bun:sqlite directly which vite couldn't resolve
(rewrote with a minimal FakeDatabase + vi.mock pattern matching the
rest of the suite).
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batching, error/system chunks
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handling
- Agent Builder: full CRUD with card grid, drag-and-drop model reorder, edit/delete
- Auto-save on edit with 600ms debounce, AbortController for concurrency, fieldset disabled until name entered
- Agent definitions stored as TOML with cwd field, loaded from global/project dirs
- Working directory: per-tab CWD override in Chat Settings, agent default CWD, auto-create on first message
- CWD validation: check-dir endpoint with ~ expansion, real-time validity indicator
- Subagent CWD validated against parent's effective CWD using path.relative
- Unavailable tool calls: caught gracefully, shown as tool call with error badge, model retries
- UI: tab bar border radius, sidebar border removed, chat input ghost style, scroll-to-bottom rectangle
- Skills dir collapse uses CSS rotation, Model Choice renamed to Chat Settings, System Prompt view removed
- Reusable SkillsBrowser/ToolPermissions with external mode for Agent Builder
- ModelSelector: Agent/Manual toggle, agent list, Agent Settings link
- Page router, skills recursive scanning, bin/up gopass removed, docker volume mounts
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- Split tab bar into user tabs (top) and subagent tabs (bottom row)
- Bottom row only visible when active user tab has child agents
- Parent user tab stays highlighted when viewing a subagent tab
- Temp tabs auto-disappear when agent completes, click to promote to persistent
- 'Open Tab' button on summon tool calls to view/reopen subagent history
- Reopening archived tabs fetches full chat history from backend
- Add parent_tab_id column to DB with safe ALTER TABLE migration
- Persist keyId, modelId, parentTabId on child tab creation
- Flush partial assistant messages on abort/error (finally block)
- Defensive JSON.parse in message restoration
- Allow all Vite hosts for local development
- Fix nested button in ToolCallDisplay (button inside button)
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- Add tabs, messages, and settings tables to SQLite database
- Backend: refactor AgentManager to manage per-tab Agent instances via Map<tabId, TabAgent>
- Backend: WebSocket events tagged with tabId for multiplexing
- Backend: tab CRUD routes (create, list, update, archive, messages)
- Backend: persist user and assistant messages to DB during chat
- Frontend: new tabStore replaces single chatStore with multi-tab reactive state
- Frontend: TabBar component using DaisyUI tabs-lift style with status dots
- Frontend: Settings sidebar panel for title generation model selection
- Frontend: wire ChatPanel, ChatInput, Header to use tabStore
- Fix HMR listener accumulation via wsClient.clearCallbacks()
- Delete old single-chat chatStore (chat.svelte.ts)
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- Add SQLite database at ~/.local/share/dispatch/dispatch.db with tables: credentials, api_keys, wake_schedule, usage_cache
- Store Claude OAuth credentials in DB with import button in Model Status UI
- Store OpenCode/Copilot API keys in DB with paste-to-import modal
- Store OpenCode cookie and workspace IDs in DB
- Migrate wake schedule from .wake-schedule.json to DB
- Migrate usage cache from in-memory Map + localStorage to DB
- Remove all env var and file fallbacks — DB is the single source of truth
- Add seed scripts: bin/import-credentials.ts, bin/seed-opencode-keys.ts
- Docker: container runs as host UID/GID with matching home directory
- Clean up dispatch.toml: remove env fields, update comments
- Progress bar time markers for usage cycle tracking
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