- Threaded a resolvedModelIsFallback flag through AgentProgress and SingleResult.
- Set the flag from the executor retry-fallback handlers and settled results.
- Rendered the observer/no-session hub path as fallback -> provider/model.
- Added an observer-only fallback-badge regression test.
Fixes#6316
Shared the bundled task prewalk default between runtime execution and the Agent Control Center. Added dashboard regression coverage for task.prewalk.
Fixes#6306
Setting options.additionalDirectories to undefined wasn't enough:
createAgentSession also merges settings.get('workspace.additionalDirectories').
Now createSubagentSettings gets an override to clear the setting
when worktree is set, ensuring isolated runs can't edit outside the
worktree.
Co-authored-by: oh-my-pi <https://omp.sh>
Isolated tasks clone only cwd into the worktree. Forwarding the
parent's additional directories would let the subagent edit absolute
paths under the original extra roots, bypassing isolation. Now
additionalDirectories is undefined when worktree is set.
Co-authored-by: oh-my-pi <https://omp.sh>
Subagents (task tool) now inherit the parent session's
additionalDirectories via ToolSession → ExecutorOptions →
CreateAgentSessionOptions, so delegated agents see the same
<workspace-roots> block and can read/grep/glob added roots.
Co-authored-by: oh-my-pi <https://omp.sh>
MCP-backed tools never declared an explicit strict value, so OpenAI-family
serializers (post-#4336/#4340) had no false to preserve and models over-filled
mutually exclusive optional fields. Task/subagent proxies also rebuilt a raw
tools/call instead of executing through the source MCPTool, bypassing intent
stripping, placeholder pruning, local-URL resolution, reconnect, abort, and
result metadata; strict servers rejected proxied calls with
unrecognized_keys ["i"].
- MCPTool/DeferredMCPTool now declare `readonly strict = false as const`.
- createMCPProxyTools delegates to the current source tool, re-resolved by raw
MCP server/tool metadata so reconnect replacements are honored, and keeps the
Task 60s timeout by combining its abort signal with the caller's.
- Regression coverage: strict flags, proxy parity for i/placeholder shaping,
declared-i passthrough, and reconnect re-resolution.
Fixes#6208
Tracked active subagent session model changes in progress snapshots so prewalk handoffs replace the starting-model badge.
Added regression coverage for a prewalk handoff and documented the fix.
Fixes#6083
The barrier in driveSessionToYield was unreachable for terminal yields:
the yield tool's shouldTerminate fired requestAbort("terminate"), so
abortSignal was always aborted before the barrier's loop condition ran,
and a run with pending owner jobs completed immediately with whatever
the pre-async yield said (Codex review on #6119).
- Split "stop the free-running turn after yield" from "terminate the
run": a terminal yield with pending owner async work now parks the
run with a recoverable session abort (budget-stop precedent) via
requestYieldTurnStop; only a quiescent yield terminates.
- An async-result follow-up injected after a recorded yield un-latches
it (transcript-ordered, in the run monitor) and re-runs the reminder
ladder, so the run only completes on a yield that postdates every
delivered result — including results injected during the notice turn.
- A run that never refreshes a superseded yield fails (exit 1) with an
explicit reason; the stale payload ships only as failed-run salvage
through the existing failed-after-yield finalize path.
- Rewrote subagent-async-pending.md: the "your current yield stands"
option contradicted the enforced contract.
- Regression tests: parked yield -> injected result -> fresh yield wins;
refusal -> stale payload fails; no-async fast path unchanged.
Narrow the invalid-yield guard to !abortSent so array-typed incremental
yield sections no longer suppress the infinite-submit-loop abort; add
regression coverage for incremental yield followed by repeated malformed
terminal yields.
Three-piece architecture so subagents inherit async.enabled and
bash.autoBackground.enabled instead of having both force-disabled:
- Owner-routed delivery: AsyncJobManager gains registerDeliverySink /
waitForOwnerJobs; every AgentSession registers a sink for its own agent
id, so background job results inject into the owning agent's run.
Owned deliveries with no live sink dead-letter (result retained on the
job row) instead of misrouting into the first top-level session.
- Quiescence barrier: a subagent's final yield with owner jobs still
running/undelivered is a scheduling pause, not completion. The run
driver notifies the model once (hub wait/cancel), settles owner work,
and folds results in as async-result follow-ups; teardown cancels and
awaits surviving jobs before isolation worktree capture/cleanup.
- Steering soft channel: queued steering no longer hard-aborts
non-interruptible tools; it aborts interruptible waits and raises a
cooperative ToolCallContext.steeringSignal. The mid-batch watch runs
for every batch, and auto-backgroundable bash backgrounds itself on
steer so incoming messages inject promptly with no work lost.
Defer recentOutput line reconstruction from every text_delta to the
progress emit boundary. appendRecentOutputTail only extends the capped
raw tail and marks dirty; refreshRecentOutput runs the exact old
split/filter/slice(-8)/reverse algorithm as the first step of every
emitProgressNow snapshot (onProgress + event bus), including coalesced
and finalize/error/cancel flushes. Reset publishes [] immediately;
replace marks dirty; past snapshot arrays stay immutable via spread.
Before (base pool median-of-5):
w8_d3 61.55 cpu_ms/1k_events
w32_d3 44.16 cpu_ms/1k_events
After (stable final run on E+G, 7 episodes, trimmed CV gate pass):
w8_d3 55.78 cpu_ms/1k_events (1.103×) trimmed CV 15.1%
w32_d3 40.72 cpu_ms/1k_events (1.084×) trimmed CV 11.1%
Checksums match prior exactness baseline; retained_after_release_kb
1284 / 2864 (no regression vs prior concur).
Op: GConcurEmitBoundary emit-boundary dirty flag
Restores: none
- Added per-invocation task schemas with strict and permissive validation.
- Shared task and eval agent policy, artifacts, isolation, and lifecycle handling.
- Enabled host-restricted plan-mode eval agents and persisted their capability clamp.
Fixes#5279
- Added the `xd://` virtual device protocol (`internal-urls/xd-protocol.ts`, `tools/xdev.ts`): tools declaring `loadMode: "discoverable"` are unmounted from the request tools array and driven via `read xd://` (list/docs+schema) and `write xd://<tool>` (execute), gated by the `tools.xdev` setting (default on) and inlined into the system prompt.
- Merged the `irc`, `job`, and `launch` tools into a single `hub` tool (`tools/hub/`, `async/job-manager.ts`): messaging keeps `send`/`inbox`/`list`, job control maps to `wait`/`cancel`/`jobs`, process supervision keeps `start`/`logs`/`stop`/`restart`/`describe` with `ps`, and the unified `wait` races background jobs against peer messages; SDK `IrcTool`/`JobTool`/`LaunchTool` are replaced by `HubTool`.
- Removed the hidden `resolve` tool in favor of the `xd://resolve`/`xd://reject`/`xd://propose` resolution devices, auto-including `write` whenever a deferrable tool or plan mode is present.
- Removed the BM25 tool-discovery system: the `search_tool_bm25` tool, the `tool-discovery` module, the `tools.discoveryMode`/`mcp.discoveryMode`/`mcp.discoveryDefaultServers`/`tools.essentialOverride` settings, per-tool MCP selection, and the `mcp_tool_selection` message type.
- Unified tool presentation on `ToolLoadMode` (`essential`|`discoverable`), replacing the custom-tool `xdev?: boolean` opt-out; custom, extension, MCP, RPC host, image-generation, and TTS tools now default to `discoverable`, and added a `satisfies` predicate to `SoftToolRequirement`.
- Removed the standalone `ssh` command tool and `ssh/ssh-executor` (the `ssh://` read/write/search protocol stays), and made `--tools` address hidden built-ins.
- Updated collab-web to render `xd://` dispatches and `hub` op families, dropped the `search_tool_bm25`/`ssh`/`report-finding` renderers, refreshed tool docs and prompts, and migrated the affected tests and changelogs.
- Updated prewalk gating in `AgentSession` to key the todo gate on active tools instead of registry presence, so deactivated todo tools no longer block prewalk handoff.
- Changed subprocess tool filtering so `todo` is stripped for normal subagents but retained when prewalk is armed, and propagated the prewalk state through tool-session setup.
- Added regression tests for restricted active-tool slates and prewalk/non-prewalk subagent tool propagation to verify todo is handled correctly in each case.
- Added schema and type updates for task-agent fields and model resolver settings.
- Extended discovery helper logic to carry resolved task-agent metadata through execution setup.
- Updated task/agent registration and execution paths to use the new capability/field data.
- Expanded test coverage for agent-field parsing, model resolution, and executor prewalk behavior.
The pre-flight auth check in resolveModelOverrideWithAuthFallback called
getApiKey without a session id. For providers with session-sticky OAuth
credentials, this returned undefined even though the credential was
usable once the subagent session started, causing the auth fallback to
silently replace the configured model with the parent's (#5325).
The subagent's id is now forwarded as the session id so session-sticky
credentials resolve during the pre-flight check. Genuinely broken auth
(stale OAuth, revoked tokens) still falls back as before.
Also propagate model resolution warnings through resolveModelOverride
and log them in the executor so users see why a pattern didn't match.
- Replaced silent budget-based termination with a graceful stop and forced-yield mechanism.
- Implemented resumable subagent states to preserve agent context upon budget exhaustion.
- Increased default soft request budget to 200 and updated IRC bus signaling to distinguish between active, resumable, and hard-aborted statuses.
- Added comprehensive status-aware prompts and unit tests to verify non-terminal abort behavior.
- Renamed task wire fields, replacing `assignment` and `description` with `task` and `name` while removing `role` references.
- Implemented automated task UI label generation using a tiny model to replace manual role descriptions.
- Updated task execution and rendering logic to support per-item agent resolution and dynamic badge display.
- Migrated schemas, prompts, and test suites to enforce the new flat task structure and agent-centric policy.
- Configured the default `task` subagent to use `auto` thinking.
- Enabled `auto` as a valid thinking-level value in agent frontmatter.
- Adjusted thinking-level precedence to ensure that explicit `:level` suffixes in resolved model patterns override agent-defined defaults.
- Renamed the `explore` agent to `scout` throughout prompt templates, agent definitions, and configuration schemas.
- Updated documentation and internal tool references to reflect the new agent identity.
Keep assistant yield tool calls pending until YieldTool.execute returns a successful tool result.
Prevent invalid pre-execution yield arguments from bypassing schema retry handling while still suppressing the soft budget abort during validation.
Fixes#5006
Persist yield tool-call arguments as soon as an assistant turn commits the yield call, before the soft request budget guard can abort the session.
Add a regression covering a yielding turn that crosses the budget threshold without a tool result event.
Fixes#5006
- Stopped the malformed-yield loop guard once a valid yield has been captured or termination is pending.
- Covered same-turn valid yield calls followed by malformed sibling yield calls.
Fixes#4957
Forward unresolved explicit subagent model selectors into child session startup so modelRoles.task cannot disappear during executor preflight and fall through to an unrelated provider default.\n\nFixes #4421
`withAbortTimeout` rejected after `MCP_CALL_TIMEOUT_MS` but left `waitForConnection` / `callTool` running because the timeout never propagated an abort signal to those underlying promises. The fix creates a per-call `AbortController` in `createMCPProxyTools.execute`, combines its signal with the caller signal via `AbortSignal.any`, and passes both the combined signal and the controller to `withAbortTimeout`, which aborts the controller on timeout or caller abort. Verified by `bun build packages/coding-agent/src/task/executor.ts --target=bun --format=esm` and `bun test packages/coding-agent/test/task-executor-mcp-timeout.test.ts`.
Closes#4242
- Introduced the `task.softRequestBudgetNotice` boolean setting to opt into budget steering notices.
- Disabled the wrap-up steering notice by default when a subagent crosses its soft request budget.
- Maintained the 1.5x graceful abort safety guard regardless of whether the steering notice option is enabled.
- Updated the settings schema to document the conditional steering notice behavior.
- Updated task tool schemas to default the `agent` parameter to `'task'`.
- Normalized missing or empty `agent` values to `'task'` during execution handling to support direct programmatic callers.
- Replaced references to the old `quick_task` worker type with `sonic`.
- Simplified prompt instructions by removing deprecated single-spawn context constraints and status polling notes.
can1357