- Seeded dirty-baseline blobs into the parent object database before reconstructing filtered agent commits.
- Used three-way synthetic-tree application for committed and trailing task state while preserving parent WIP.
- Added a focused merge regression covering unrelated edits in the same tracked file.
Fixes#6135
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 flat single-spawn task wire schema carries arktype `"+": "delete"`, so a
batch `{ context, tasks[] }` payload sent while `task.batch` is disabled has
those keys stripped and is then rejected as `task must be a string (was
missing)` in the agent loop. That preempts the tool's own actionable checks
(validateShapeParams / validateSpawnParams), so the model only ever saw the
misleading arktype error instead of "task.batch is disabled…".
Mark TaskTool with lenientArgValidation so the agent loop forwards the raw
args to execute() on any arktype failure, letting the tool's shape checks
surface the real reason. Valid calls still normalize through arktype; the
success path is unchanged. Mirrors the existing yield-tool pattern.
Fixes#6039
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.
Add an optional `apply` parameter to the `task` tool so
`isolated: true, apply: false` captures patch/branch artifacts without
applying changes to the parent checkout. Available as a flat top-level
control and per `tasks[]` item. Shares the task/eval isolation-to-executor
translation via a single `toStructuredSubagentIsolationControls` adapter.
rev-parse --git-common-dir resolves symlinks while ensureIsolation derives
sourceCommonDir lexically from the session cwd (resolveRepository walks
path.resolve'd components). On any symlinked repo path (macOS /tmp,
symlinked project dirs) the lexical comparison missed, detachGitDir
returned "independent", and the parent-mutation leak silently survived.
Realpath both sides before comparing; regression test drives the gate
through a symlink alias.
- Match the rcopy worktree-add registration via realpath: git canonicalizes
the admin gitdir back-reference (macOS /var -> /private/var), so the
lexical comparison missed it and left a stale registration in the source
repo's worktree list.
- Carry core.fileMode so an explicit filemode=false source does not read as
mode-changed files in the detached isolation.
- Carry core.splitIndex and the sharedindex.* files referenced by a split
source index; restoring the raw index without them broke every git read.
- Carry the source shallow boundary file so history traversal over the
borrowed object DB stops at the boundary instead of failing.
- Regression test covering all three carries.
A fresh `git init` in detachGitDir dropped core.sparseCheckout and the
sparse-checkout patterns, and rebuilding the index via write-tree/
read-tree discarded skip-worktree bits. Files intentionally absent from
a sparse working tree then read as deletions, which delta capture could
apply back to the parent.
detachGitDir now restores the index verbatim (preserving skip-worktree,
assume-unchanged, and exact stage entries) and carries
core.sparseCheckout, core.sparseCheckoutCone, and info/sparse-checkout
into the detached .git before restoring the index. Falls back to
read-tree HEAD only when the source had no index.
Fixes#6003
A linked git worktree with an unborn HEAD (a fresh/orphan branch with no
commits) still shares the parent's common dir, so an isolated task's
first branch and commit would write into the parent repo. The previous
early return on a missing HEAD SHA left that shared metadata intact.
detachGitDir now severs unborn worktrees too: `git init -b <branch>`
preserves the checked-out branch name, ref freezing is gated on a born
HEAD, and the rcopy worktree registration is still removed.
Fixes#6003
Copy isolation backends (reflink/apfs/btrfs/zfs/block-clone/rcopy)
materialise the worktree by duplicating its `.git` verbatim. When the
parent is a linked git worktree its `.git` is a pointer file, so the
isolation shared the parent's HEAD/index/ref namespace: a task's
`git checkout`/`commit` moved the parent's branch, and the rcopy
`git worktree add` path stacked task branches in the shared namespace.
`ensureIsolation` now runs `git.detachGitDir` after `isoStart`, turning
each isolation into a standalone repo with a frozen HEAD/refs/index
snapshot that borrows the source object database via
`objects/info/alternates`. Isolated git ops stay private, every task
branch is parented on the requested base, and patch/branch capture
(`git fetch <merged>`) still resolves objects.
Fixes#6003
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
- Preserved goal-mode tool injection for ordinary explicit tool lists.
- Kept plan-mode LSP and IRC unavailable under the host capability clamp.
- Added regressions for both capability boundaries.
- 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.
- Replaced legacy `pi/` role alias prefix with canonical `@` syntax across model resolution, documentation, and tests.
- Added support for bare `*` default alias and multiple alias prefix detection with custom role resolution in `resolveConfiguredRolePattern()`.
- Enhanced thinking suffix parsing to accept unambiguous abbreviations (minimum 2 characters) for effort and level selectors.
- Extended `resolveCliModel()` and `filterAvailableModelsByEnabledPatterns()` to accept settings parameter for role alias resolution from `--model` flag.
- 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.
- Enabled granular task execution by allowing batches to interleave blocking items with non-blocking async background spawns.
- Updated task orchestration to support simultaneous inline result collection and persistent background job tracking.
- Improved agent visibility in the job tool by reporting running subagents even when not explicitly linked to a backing job ID.
- Enhanced terminal state handling to prevent premature tool block closures while async background operations remain active.
- 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.
- Centralized task concurrency and delegation logic by moving instructions from individual tool descriptions to the system prompt.
- Introduced conditional system prompt logic to handle model-specific task policies, including support for GPT-5.6.
- Added infrastructure for task concurrency normalization and IRC steering state within the system prompt configuration.
- Refactored prompt inputs and session logic to enable dynamic system prompt updates based on model-specific policy cohorts.
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
Capture a patch artifact from the live isolation worktree when branch-mode commit transfer fails, before cleanup can destroy the untransferred objects.
Fixes#4437
An intermediate commit whose net effect is already on HEAD (redundant
change, or 3-way merged to HEAD by "theirs == ours") stopped the
sequencer with "The previous cherry-pick is now empty" and was
treated as a hard conflict. mergeTaskBranches aborted the whole range,
marked the branch failed, and dropped every remaining non-overlapping
commit.
Add cherryPick.skip and cherryPick.isEmptyError to the git namespace,
then in mergeTaskBranches' catch classify the failure before aborting:
loop --skip while the error stderr matches the "now empty" phrase so
consecutive empties advance the sequencer; fall through to abort/fail
on the first non-empty error (genuine conflict with unmerged files).
Fixes#4438
- 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.
- Ensures in-memory overlay edits are durably written to the plan file before proceeding with approval.
- Avoids asynchronous write races by awaiting the final plan file serialization.
- Aligns synthetic approved-plan prompts with reference-only expectations.
- Implemented safe `releasePermit` helper to track whether a concurrency permit has been acquired before releasing.
- Guarded against double-releasing or releasing unacquired semaphore permits during queued job cancellation or abort events.
- Added comprehensive unit tests validating concurrency cap enforcement when queued jobs are cancelled.
can1357