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# Conflicts:
# packages/api/src/agent-manager.ts
# packages/api/tests/agent-manager.test.ts
# packages/frontend/src/lib/tabs.svelte.ts
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Root cause of the 'first warmup misses' + 'switch to chat misses' bugs:
Anthropic keys the MESSAGE-level prompt cache on `tool_choice` AND the
extended-thinking parameters (both rows in their cache-invalidation table mark
the messages cache as invalidated on change). The original warmCache() sent
toolChoice:'none' and NO thinking providerOptions, while real turns send
toolChoice:'auto' + thinking config for the effort. So warming and chat wrote
TWO different message-cache buckets:
- warmup #1 missed (no warm-only bucket existed yet), every later warmup hit
its own bucket;
- the next real chat message read the OTHER bucket → miss.
Fix: extract a shared buildStreamOptions() that produces the cache-affecting
params (toolChoice + thinking providerOptions + maxOutputTokens). Both run()
and warmCache() now call it with the SAME resolved reasoning effort, so the
warming replay refreshes the exact cache the next real message reads. The
trivial probe turn is still appended AFTER the last cache breakpoint, so it
never disturbs the cached prefix.
Threaded the per-tab reasoning effort (per-model -> per-tab selector -> default,
mirroring processMessage) from the frontend resolver through POST /chat/warm to
warmCacheForTab to warmCache.
Tests: updated the warmCache toolChoice test to assert it MATCHES a real turn,
added an invariant test driving run() and warmCache() and asserting identical
cache-affecting params, and assert effort forwarding in the frontend store.
check / test (780) / frontend build / typecheck all green.
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Keep a tab's provider prompt-cache warm while idle by periodically replaying
the exact cached conversation prefix plus a single trivial throwaway turn,
resetting the provider's ~5-min cache TTL so the user's next real message hits
a warm cache.
Backend:
- Agent.warmCache(history): extracts buildLlmContext() shared with run(), then
re-sends the identical system+tools+history prefix (same Anthropic
cache_control breakpoints) plus a 'reply with just a .' probe turn via
toolChoice:none. Returns the request usage; mutates no history, emits/persists
nothing.
- AgentManager.warmCacheForTab(): resolves the same agent the next real turn
would use, replays the FULL genuine history, refuses while a turn is running.
- POST /chat/warm: returns ONLY the warming request's usage (never persisted,
never folded into the real usage aggregate).
Frontend:
- cache-warming.svelte.ts store: per-tab 4-min repeating idle timer with
countdown, warming-specific last-request cache %, and error capture. Arms on
turn end, pauses during a turn, disables+resets on a real user message.
- cache-warm-storage.ts: per-tab localStorage persistence of the toggle.
- Lifecycle hooks wired into tabs.svelte.ts (status/statuses/sendMessage/
hydrate/create/open/close).
- ModelSelector: bottom-of-panel checkbox + debug strip (last-% / countdown /
error), shown only when enabled. Warming cache data never touches the real
Cache Rate view.
Tests: core warmCache (5), api warm route (3) + warmCacheForTab (3), frontend
store (12) + storage (10). check / test (779) / frontend build / typecheck all
green.
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# Conflicts:
# packages/frontend/src/lib/components/ChatInput.svelte
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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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Add multimodal image/PDF input to the chat box via clipboard paste, gated by a
graceful per-model capability check.
UX: a pasted image/PDF inserts an inline token (【image:…】 / 【pdf:…】) into the
draft, so attachments have ORDER relative to typed text and can be referenced
positionally. The token is the only handle — deleting it (atomic Backspace/
Delete, or selection overlap) detaches the file; an input-reconciliation safety
net detaches any attachment whose token is no longer intact. No preview strip.
Capability check: resolveModelCapabilities reads models.dev modalities.input
(new GET /models/capabilities, mirrors /context-limit). The input blocks Send
(no tokens spent) only on a definitive 'no'; unknown capability (catalog offline
/ unmapped provider) stays permissive. Attachments require a fresh turn — Send is
blocked while generating and /chat rejects content mid-turn (409).
Attachments are EPHEMERAL: forwarded to the model for the turn via ordered AI SDK
ImagePart/FilePart content, but never persisted (history keeps the text with
[image]/[pdf] markers). Text-only turns serialize byte-identically to before.
Limits (Anthropic-aligned, enforced at paste + re-validated server-side):
PNG/JPEG/WebP/GIF/PDF; image ≤5MB, PDF ≤32MB, ≤20 attachments, ≤32MB total.
core: UserContentPart types, models/attachments validator, capability resolver,
agent.run+toModelMessages thread ordered content. api: /chat content validation +
passthrough. frontend: attachment-tokens helper, ChatInput paste/token/gating,
per-tab staged attachments, App.svelte capability fetch. +44 tests.
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Replace the imperative id-based CRUD todo tool (add/update/list/get/remove)
with opencode's declarative whole-list design: a single `todos` param that
replaces the entire list each call. No model-visible ids, no delta reasoning,
no "task not found" spirals.
- core: TaskItem { id, content, status }; statuses pending|in_progress|
completed|cancelled. TaskList.setTasks/getTasks/onChange. New rich
TODO_DESCRIPTION adapted from opencode's todowrite.txt.
- api: TASK_MANAGEMENT_GUIDANCE system-prompt section (from anthropic.txt);
updated TOOL_DESCRIPTIONS.todo. Reload fix: TabStatusSnapshot now carries
per-tab tasks so getAllStatuses rehydrates the panel on reconnect.
- frontend: mirror types; hydrate tasks from snapshot in both restore paths;
upgrade sidebar Tasks panel to render content + all four statuses + progress.
- tests: new core task-list.test.ts (15); updated api TaskList mocks +
getAllStatuses task-snapshot coverage.
bun run check clean; 569 tests pass; all packages typecheck.
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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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# Conflicts:
# packages/api/tests/agent-manager.test.ts
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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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Add a per-model/key reasoning effort setting to agent definitions,
surfaced and editable in the Agent Settings page and displayed at a
glance in the model selector views.
- core: single source of truth for effort levels (REASONING_EFFORTS,
DEFAULT_REASONING_EFFORT='high', labels, isReasoningEffort guard);
add 'xhigh' level; AgentModelEntry.effort; xhigh budget=24000 for
classic-thinking Claude; default floor 'high'. Persist/parse effort
in the agent TOML loader.
- api: thread effort through the fallback chain with per-model -> per-tab
-> default precedence; validate /chat + agentModels effort from the
canonical list.
- frontend: effort <select> per model row in AgentBuilder; effort badges
in ModelSelector (agent + subagent chains); Thinking dropdown sourced
from canonical list; per-tab default raised to 'high'.
- tests: +15 (loader round-trip, agent xhigh budget, canonical list +
guard, api precedence, route validation).
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A message queued while the agent was mid-turn was only handled if it
arrived DURING a tool batch (injected as a [USER INTERRUPT]). If it
landed after the last tool call — or the turn had no tools — the agent
silently appended it to history and ended the turn with no response, so
it sat there unanswered. This affected both user-queued messages and
agent-queued ones (send_to_tab).
- agent.ts: stop the end-of-turn drain that swallowed trailing queued
messages into history. They now stay on the queue.
- agent-manager: after a CLEAN turn settles, continueFromQueue() drains
the queue and starts a fresh turn to answer it. Skipped on a
user-stopped or errored turn (queue preserved for the next send).
- Loop safety: continuation draws from the existing autoWakeBudget, so a
runaway agent<->agent chain is bounded; human sends refill it, so human
conversations are never throttled.
- dequeueMessages now tags message-consumed with reason
"interrupt" | "continuation"; the frontend collapses continuation-
consumed queued bubbles into the next turn's initiator row (avoids the
linger/dup traps documented in queue-interrupt-reconcile-edge-cases.md).
- Tests: agent (no-swallow + interrupt regression), agent-manager
(continuation, no-op when empty, user-stop preserves queue, bounded
loop), frontend (continuation bubble becomes next initiator).
- wishlist: remove the now-fixed item.
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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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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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- send prompt-caching + oauth anthropic-beta headers on the Claude OAuth provider
- restructure the OAuth request body (billing header, identity split, relocate
third-party system prompt to the first user message) to match Claude Code
- apply rolling cache_control breakpoints and group a turn's tool results into a
single role:tool message for correct breakpoint placement
- emit per-step usage events (cache read/write split) and add the Cache Rate
sidebar panel
- dedup byte-identical tool calls within a single batch
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refreshAgentConfig (added to pick up model/key edits on send) also
overwrote the tab's workingDirectory with the agent's default cwd every
time, discarding the directory the user set via setWorkingDirectory.
Remove that line so refreshing agent config no longer clobbers the
per-tab working directory.
Also merge top-level wishlist.md into dispatch/wishlist.md and drop
the items completed today (subagent summon, stop button).
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- Add POST /chat/stop endpoint on API
- Thread abortSignal from agent-manager through Agent.run() to streamText
- Thread abortSignal option through the Agent.run() signature
- Emit status:idle on stopTab() so frontend WS gets the update
- Add stopGeneration() store method on frontend tabStore
- Add stop button in ChatInput (btn-sm lg:btn-xs for mobile tap target)
- Add tests for /chat/stop endpoint
- Refactor processMessage to pass abortSignal to agent.run
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preserve slider selection on agent config refresh
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AgentBuilder default, SubAgent mode display
- Filter summon tool catalog to is_subagent-flagged agents only
- Return fresh subagent list in error when slug not found
- Add subagent hint to system prompt when summon tool available
- Default is_subagent checkbox to true in AgentBuilder
- Fix tab-created event to include agentSlug and agentModels
- Add SubAgent read-only mode to ModelSelector with model slider
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- Refresh agent config from API before sending a message so edits
in AgentBuilder (changed keyId/modelId/agentModels) take effect
immediately on existing tabs instead of using stale snapshots
- Broaden isRetryable check to also match 'usage limit' and
'exhausted' so fallback keys are actually tried on quota errors
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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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running in background
Implements the 'background-running agents + restore-layout-on-reopen'
feature. Full design and parallel-implementation plan in
`plan-bg-restore.md`; Gemini code review (SHIP verdict, no findings) in
`report.md`.
User-visible behaviors:
1. Browser-close keeps agents alive. If an agent is mid-stream when
the browser closes / reloads / loses the network, it continues
processing on the backend. (This was already the case in code —
agents run fire-and-forget in app.ts:77-79 — but it was previously
pointless because the UI never restored the tab to receive the
output.)
2. Layout restore on browser reopen. Every tab that existed at the
time the window was closed is restored, in original `position`
order, with full persisted message history. Tabs whose agents
finished while disconnected appear with the completed message.
Tabs whose agents are still running appear streaming live — the
in-flight assistant message is reconstructed from the backend's
in-memory `currentChunks` (sent over the wire on connect) and
accumulates new deltas as they arrive.
3. Explicit tab-close cancels + forgets. Clicking the X still
cancels the agent (existing `stopTab` in DELETE /tabs/:id) and
archives the row (`is_open = 0`), so it is not restored. No
change to that path.
The gap that the implementation closes: previously, App.svelte:onMount
unconditionally called `createNewTab()` with a fresh UUID, ignoring
every existing row in the `tabs` table. Every browser open was a
clean slate. The DB had the conversation history but no way for the
UI to discover it.
Implementation:
• New `TabStatusSnapshot` interface in
packages/core/src/types/index.ts (auto-exported via existing
`export * from "./types"`):
interface TabStatusSnapshot {
status: AgentStatus;
currentChunks?: Chunk[]; // present iff running
currentAssistantId?: string; // present iff running
}
• `agent-manager.ts:getAllStatuses()` rewritten to return
`Record<string, TabStatusSnapshot>` (was
`Record<string, AgentStatus>`). For running tabs only, attaches a
defensive shallow copy of `tabAgent.currentChunks` (the live
streaming array the per-message loop appends to) plus the DB id
of the in-flight assistant message. The defensive copy is the
consumer's to mutate. Idle / error tabs get `{ status }` only.
`GET /status` and the WS `onOpen` snapshot both pick up the new
shape automatically — neither call site changed.
• Frontend mirror of `TabStatusSnapshot` in
packages/frontend/src/lib/types.ts; `AgentEvent.statuses` variant
updated to use `Record<string, TabStatusSnapshot>`.
• New `hydrateFromBackend()` on the tab store
(packages/frontend/src/lib/tabs.svelte.ts). Sequence on app
mount:
1. Bail with 0 if `tabs.length > 0` (hot-reload idempotency).
2. GET /tabs → list of `is_open=1` rows in
`position` order.
3. GET /status → in-flight TabStatusSnapshot map.
4. GET /tabs/:id/messages for each tab in parallel via
Promise.all → persisted ChatMessage[].
5. Build the Tab objects, splicing the snapshot's live
chunks into the in-flight assistant message for every
running tab (two paths: merge into the existing DB row
with matching id, or append a fresh in-flight message
if no row matches).
6. `tabs = restored; activeTabId = restored[0]?.id ?? null;`
Every fetch is wrapped in try/catch so one tab's failure can't
destroy the whole restore pass.
• WS `statuses` handler in `tabs.svelte.ts:handleEvent` rewritten
for the new shape. Still fires `reloadTabMessagesFromApi` on the
desync case (frontend thinks running, backend says idle — the
pre-existing recovery path is preserved). When backend says
running, seeds in-flight chunks into the assistant message
matching `snap.currentAssistantId` (creating it if needed).
When backend says non-running, clears `isStreaming` on the
previous in-flight message and nulls `currentAssistantId`.
• `App.svelte:onMount` now awaits `tabStore.hydrateFromBackend()`
before deciding whether to fall back to `createNewTab()`.
Fallback condition is the doubly-defensive
`restored === 0 && tabStore.tabs.length === 0`. `wsClient.connect()`
fires in parallel with hydration — the resulting WS `statuses`
event is per-tab idempotent against the hydrated state, so there
is no race even if it arrives mid-hydration.
What was NOT done (deliberately, deferred to wishlist):
• Pre-existing inconsistency: core `AgentStatus` includes
"waiting_for_key" but frontend `TabStatusSnapshot.status` uses
only the existing 3-state pattern ("idle" | "running" | "error").
Not introduced here; mirrored the existing precedent.
• Restored tabs use defaults for `reasoningEffort`, `agentSlug`,
`agentScope`, `agentModels`, `workingDirectory` — these are not
in the DB `tabs` schema. Future schema expansion.
• Per-delta DB flushing — not needed; the in-memory snapshot
covers the gap between flushAssistant calls.
• LocalStorage cache of tab ids — backend DB is the source of truth.
Process notes:
• Implemented via parallel programmer subagents (flash agents were
requested but unavailable in this environment — substituted with
"programmer" agents, which share the "reads a plan, implements a
single step" charter). Backend (Segment A: getAllStatuses + 5
tests) and frontend (Segment B: types + hydrateFromBackend +
statuses handler + onMount + 8 tests) ran disjoint-file-ownership
in parallel.
• Gemini code review (yolo mode for tool access, explicit
prompt-level write restriction to `report.md` only) returned a
SHIP verdict with no findings against the plan.
• Self-review surfaced one followup gap that Gemini's earlier
plan-mode pass also caught: no explicit test for
`/tabs/:id/messages` failure isolation. Added a test covering
both HTTP-500 and network-error variants alongside a healthy
tab, asserting per-tab failures don't destroy the whole restore.
Tests:
• api/tests/agent-manager.test.ts: +5 (snapshot empty record,
idle-tab field omission, running-tab field inclusion, defensive
copy invariant, omits chunks for running tab with null
currentChunks). 31 total (was 26).
• frontend/tests/chat-store.test.ts: +9 (restore-with-messages,
in-flight seeding, /tabs failure → 0 returned, empty /tabs
array, idempotency when tabs already exist, idle-status when
/status omits, running-snapshot statuses handler seeding,
idle-snapshot statuses handler clearing, per-tab failure
isolation across HTTP-500 and network-error). 44 total (was 35).
Totals: 243 tests across 3 packages all green; typecheck clean on
core + api + frontend; biome clean across 124 files.
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reasoning round-trip + max-thinking budget audit
Migrates the LLM stack from [email protected] + @ai-sdk/[email protected] +
@ai-sdk/[email protected] to [email protected] + @ai-sdk/[email protected]
+ @ai-sdk/[email protected]. Full design in plan-v6-upgrade.md;
two rounds of Gemini code review captured in report.md.
Motivation: the recurring 'reasoning-signature without reasoning' error
on Claude Opus 4.7 was a v4 SDK artefact — @ai-sdk/[email protected] emitted
Anthropic signature_delta as a separate stream chunk that orphaned when
the model produced a signed-but-empty thinking block, and our chunk
store had no signature field so the round-trip back to Anthropic was
rejected on the next turn. In v6, signatures arrive inside
providerMetadata on the reasoning-end event, and the orphan-signature
class of bug is gone at the SDK level.
Core changes:
• ThinkingChunk gains optional metadata?: Record<string, unknown>
(the v6 providerMetadata blob). A non-undefined metadata 'seals'
the chunk: subsequent reasoning-delta opens a new chunk rather
than extending the sealed one.
• AgentEvent gains { type: 'reasoning-end'; metadata? } (replaces
the v4 reasoning-signature variant).
• toModelMessages (replaces toCoreMessages):
- returns ModelMessage[] (was CoreMessage[])
- thinking → { type: 'reasoning', text, providerOptions: metadata }
- tool-batch entries → { type: 'tool-call', input } (was 'args')
- tool results → { output: { type: 'text', value } } ToolResultOutput
• Claude OAuth uses createAnthropic({ authToken }) natively — no more
custom-fetch x-api-key → Bearer swap.
• rewriteBodyForOpus47 deleted — Opus 4.7 adaptive thinking is native
via providerOptions.anthropic.thinking = { type: 'adaptive' }.
• V1 middleware → V3 (specificationVersion: 'v3').
• v4-era normalizeMessages openai-compatible middleware deleted; the
v6 openai-compatible provider extracts reasoning_content natively
from { type: 'reasoning' } content parts.
• applyAnthropicStructuralNormalisations (mirrors opencode
provider/transform.ts:53-148): drops empty text/reasoning parts,
scrubs non-[a-zA-Z0-9_-] toolCallIds, splits [tool-call, non-tool]
assistant turns (Anthropic rejects tool_use followed by text).
• applyOpenAICompatibleReasoningNormalisation (mirrors opencode
transform.ts:217-249): lifts reasoning text into
providerOptions.openaiCompatible.reasoning_content (always, even
empty). Solves DeepSeek 'The reasoning_content in the thinking
mode must be passed back' — the v6 SDK skips emitting
reasoning_content when text is empty (dist/index.mjs:245), but
DeepSeek requires the field present once thinking was used.
• Tools: tool({ inputSchema: jsonSchema(zodToJsonSchema(...)) })
(was parameters: ZodSchema). AI SDK tools have no execute
callback — the agent runs tools manually for permission prompts
and shell-output streaming. New dep: zod-to-json-schema@^3.25.2.
• fullStream event loop rewritten for v6 event shape: text-delta
(text not textDelta), reasoning-start/delta/end, tool-input-*,
tool-call (input not args), tool-result, tool-error (new), abort
(new), start-step/finish-step, finish.
Max-thinking audit (matches opencode transform.ts:642-671 budgets):
• Claude enabled-thinking max budget 16000 → 31999 (Anthropic ceiling)
• Claude enabled-thinking high budget 10000 → 16000
• maxOutputTokens 'budget + 8000' → fixed 32000 (matches opencode's
OUTPUT_TOKEN_MAX; model self-allocates thinking vs response within)
• Opus 4.7 adaptive thinking gains display: 'summarized' and sibling
effort field (without these, thinking content is hidden by Anthropic
and the model barely thinks).
Frontend mirrors:
• types.ts — ThinkingChunk.metadata?, AgentEvent reasoning-end
• tabs.svelte.ts — routes reasoning-end through applyChunkEvent
• ChatMessage.svelte — hides empty thinking chunks; hides the entire
assistant bubble when no chunk has renderable content
Gemini-review-driven fixes:
• tool-error and abort stream events now surface as error chunks
(were silently ignored)
• toolCallId scrubbing pass (opencode transform.ts:96-122 parity)
• Empty-reasoning-cull explicit test coverage for both Anthropic
structural normalisation and DeepSeek path
Test counts (223 tests across 3 packages, all green):
• tests/chunks/append.test.ts: 44 (was 38) — reasoning-end sealing,
orphan walk-back, multi-block interleaving
• tests/agent/agent.test.ts: 24 (was 5) — exhaustive v6 event
mappings, structural normalisations, signature/reasoning_content
round-trip, tool-error/abort branches, DeepSeek scenario, empty
reasoning edge case
• tests/llm/provider.test.ts: 9 (was 22) — dropped 13 obsolete v4
middleware tests; new minimal tests confirm no middleware wrapping
on default openai-compat path and that createAnthropic gets
authToken vs apiKey correctly for OAuth vs api-key flows
• tests/tools/registry.test.ts: 10 (was 4) — v6 tool() contract
(inputSchema, no execute, JSON Schema for nested zod)
• packages/api/tests/agent-manager.test.ts: 12 (was 7) — mock Agent
emits v6 reasoning events; reasoning-end broadcast + ordering
• packages/frontend/tests/chat-store.test.ts: 35 (was 32) —
reasoning-end flow through Svelte $state store
typecheck clean (tsc --noEmit on core + api, svelte-check on frontend),
biome clean across 124 files.
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createTabStore + handleEvent (replaces POJO harness)
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API, surface callback errors instead of swallowing
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includes store-state + per-message chunk summary for diagnosability
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batching, error/system chunks
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- Added model-changed event: backend emits it on fallback, frontend updates tab keyId/modelId
- Range slider embedded inside active agent card when >1 model configured
- Live label updates on drag (oninput), backend call only on release (onchange)
- Slider auto-positions when fallback occurs via model-changed WS event
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copy truncation
- Agent rate-limit fallback now iterates through agent's configured models[] in strict order
- Frontend sends agentModels with each /chat request; backend uses buildFallbackSequence()
- Emits notice event on fallback so chat shows which key failed and what's being tried next
- Child agents inherit parent's agentModels for fallback
- Added statusCode propagation from AI SDK errors for programmatic 429 detection
- Copy button truncates all tool results at 300 chars (was 200 for 4 specific tools)
- run_shell, summon, youtube_transcribe: background mode support
- summon: blocking mode by default with getResult callback
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- Resolve relative cwd paths (e.g. ./subtask) against parent's working directory at runtime
- check-dir endpoint resolves relative paths and returns the resolved absolute path
- AgentBuilder shows resolved path below input for relative paths, updated helper text
- tab-created event now includes workingDirectory so subagent tabs display their cwd in sidebar
- Add workingDirectory to tab-created AgentEvent type definition
- spawnChildAgent stores resolved absolute path instead of raw relative path
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- Add is_subagent checkbox to agent editor; subagents are hidden from Chat Settings
- Add is_subagent field to AgentDefinition type, TOML serialization, and API route
- Filter subagents from ModelSelector agent list
- Fix all biome lint/format errors across codebase (useLiteralKeys, noNonNullAssertion, noExplicitAny, formatting, import sorting)
- Fix svelte-check errors (type narrowing in SkillsBrowser, ToolPermissions, SidebarPanel)
- Fix a11y warnings in App.svelte (label-control associations)
- Fix test mocks missing BackgroundShellStore, BackgroundTranscriptStore, createWebSearchTool, createYoutubeTranscribeTool
- Update stale 409 test to match current message-queuing behavior
- Exclude packaging/ and release/ dirs from biome to avoid linting stale build artifacts
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- Add message queue allowing users to send messages while agent is running
- Queue messages are injected into tool results as [USER INTERRUPT]
- Retrieve tool interrupted via Promise.race when user message arrives
- Queued messages show with 'queued' badge and cancel button
- Consumed messages repositioned and chat splits at interrupt point
- New assistant message block created after interrupt for clean flow
- Add POST /chat/cancel endpoint for cancelling queued messages
- Fix CORS to allow any origin (Tailscale/LAN access)
- Fix crypto.randomUUID fallback for non-secure contexts (HTTP)
- Fix frontend API URL derivation from page hostname
- Auto-create DB tab if missing on processMessage (foreign key fix)
- Add error logging to processMessage catch block
- Fix working directory input sync on agent switch
- Fix agent mode button to re-apply agent settings
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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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Include keyId and modelId in the tab-created WebSocket event so child
agent tabs inherit the parent's model selection on the frontend.
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double-execution bug fix
- Add summon/retrieve tools for spawning child agents in new tabs
- summon: non-blocking, returns agent_id immediately
- retrieve: blocking, waits for child to finish, returns result
- Child tools are intersected with parent permissions (no privilege escalation)
- Working directory validated to stay within workspace
- Abort controller stops orphaned agents on tab close
- Rename task_list tool to todo with comprehensive usage guidance in system prompt
- Rename PermissionLog.svelte to ToolPermissions.svelte
- Add 'Summon agents' toggle to tool permissions UI
- Redesign TaskListPanel with DaisyUI checkboxes (indeterminate for in-progress)
- Remove 'blocked' status from task system
- Add tab-created WebSocket event for child agent tab visibility
- Add HMR cleanup for WebSocket connections (close stale connections on hot reload)
- Fix ensureAssistantMessage to not throw on closed tabs
- Fix double tool execution: remove execute from AI SDK tool() in registry.ts
(agent.ts already executes tools manually via executeToolWithStreaming)
- Fix all pre-existing test failures (missing mocks, stale API signatures)
- Add debug info to copy button (tab ID, injected skills, all tab IDs)
- Add tab ID and tools to conversation copy output
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- Add skills toggle system: check skills in sidebar to inject with next message
- Auto-check default skills on new tab creation for first-message injection
- Track injected skills per tab with visual highlights in skills browser
- Redesign tab bar: double-click background for new tab, larger close button
- Update default system prompt
- Fix streaming text duplication: change WS callbacks from array to Set
- Fix biome config: exclude references/ directory
- Auto-format with biome
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sidebar, UI polish
- System Prompt sidebar view: editable textarea, save-on-send, reset button
- Tool permissions: save-on-send pattern (not immediate), reset button
- Dynamic system prompt: buildSystemPrompt reads from DB, tool list auto-generated
- Responsive sidebar: overlay on small screens with backdrop
- Chat bubbles: user=fit-width, assistant=full-width
- Fix infinite loops (use onMount for data fetching)
- Fix sendMessage race condition (await settings saves before chat POST)
- Model selector: auto-open model modal after key selection
- Rename views: Permissions->Tools, Tab Settings->Model Choice
- Shared appSettings store for cross-component reactive state
- Delete old chat.svelte.ts
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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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