* feat(plugins): add capability-gated Host reader for conversation content
Plugins can now read historical user/agent message content over the Host
data API, gated by a new `api_read:messages` capability (ADR 0047). This
unblocks "summarize yesterday"-style plugins that the live `message.added`
bus event alone cannot serve.
- proto: `ListMessages` RPC + `Message`/`MessageFilter` on `service Host`.
- SDK: `Host.Messages() MessageReader`, Go-native `Message`/`MessageFilter`.
- host: `api_read:messages` accessor + denied reader; content sanitized via
`sysprompt.StripSystemContent` (no raw system prompts); RFC3339 `since`/
`until` → `InvalidArgument` on bad input.
- data: new `ListMessagesForPlugin` filtered query (session/task ids, type,
created_at range) through the task service, never the DB file.
- tests: in-process + wire capability gating, content stripping, filter/time
passthrough, pagination, and the SQLite query.
- docs: ADR 0047, spec, plugins-manifest, plugins-authoring.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* feat(plugins): add Host.InvokeUtilityAgent for settings-selectable utility agent
Plugins can now delegate a one-shot LLM step to an operator-configured agent,
gated by a new `agent_invoke` capability (ADR 0048), so a plugin needs no
provider API key of its own.
- setting: new `utility_agent_profile_id` user setting (Settings > System >
Utility Agent), a profile dropdown cloned from the existing utility-agent
path; selectable in the UI.
- capability: boolean `agent_invoke`, enforced like `state`/`secrets`.
- proto/SDK: `InvokeUtilityAgent(prompt) -> text` RPC and
`Host.InvokeUtilityAgent(ctx, prompt)`.
- backend: reuses the sessionless host-utility inference tier (ADR 0002) via a
thin adapter — no agent loop, no task/session/workspace; resolves the
configured profile to (agent type, model). Unconfigured / deleted profile ->
gRPC FailedPrecondition.
- tests: capability gating, completion path (asserts the configured profile is
used and text returned), no-utility-agent and stale-profile error paths,
SDK/wire round-trips, and the settings apply/trim behavior.
- docs: ADR 0048, spec, plugins-manifest, plugins-authoring.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* fix(plugins): resolve utility-agent deps live and bound message filter size
Address CI + review feedback on the host plugin capabilities:
- docs: register the new /settings/system/utility-agent route in
docs/public/coverage.json (fixes the "Validate public docs" CI failure).
- utility agent (ADR 0048): hostUtilityMgr is wired late in boot — after
StartActivePlugins has already spawned boot-active plugins — so snapshotting
the utility deps in hostForPlugin stranded those hosts with nil deps and made
InvokeUtilityAgent return Unimplemented for their lifetime. Read the deps live
from the Service (mutex-guarded) at call time instead; add a regression test
for late wiring reaching an already-spawned host.
- messages (ADR 0047): cap the combined session/task/type filter values at 400
so an oversized filter fails fast with InvalidArgument instead of hitting
SQLite's host-parameter limit at query execution; add a test.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Kandev Agent <agent@kandev.dev>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* docs(plugins): draft Host data API proto (read + write DTOs)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* docs(plugins): ADR + spec + plan for the Host data API
Plugins access kandev data via capability-gated Host gRPC RPCs returning
hand-mapped DTOs, never the DB directly. ADR 0042.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* feat(plugins): add Host data API RPCs and DTOs to plugin proto
Extends the existing service Host (per ADR 0042) with read RPCs
(ListTasks/GetTask, ListWorkspaces, ListWorkflows, ListWorkflowSteps,
ListAgentProfiles, ListRepositories, ListSessions, ListSessionCodeStats)
and declares the deferred phase-2 write RPCs (CreateTask, UpdateTask,
CreateComment) so the contract is stable for later tasks. Regenerates
plugin.pb.go/plugin_grpc.pb.go via `make -C apps/backend proto`.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* feat(plugins): Host data API SDK accessors + session LOC aggregation
Wave 1-2 of ADR 0042: pkg/pluginsdk gains typed reader accessors (host.Tasks(),
host.Sessions().CodeStats(), host.Workflows(), ...) over the extended Host gRPC
service, with proto<->native DTO conversions and an UnimplementedHostData seam
for the kandev-side impl. internal/analytics gains the per-session LOC
aggregation those readers surface. Backend handlers + capability gating land in
the next wave.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* feat(plugins): capability-gated Host data read handlers (ADR 0042)
Implement pluginHost Tasks/Sessions/Workspaces/Workflows/AgentProfiles/
Repositories readers: each gated on api_read:<resource> (PermissionDenied
otherwise), backed by the service layer via narrow injected interfaces, and
hand-mapped to the pluginsdk DTOs. Sessions().CodeStats routes through the
analytics aggregation; acp_session_id preserves the metadata->resume_token
fallback. Wired through plugins.Service.SetDataSources + backendapp.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* test(plugins): wire test for Host data reads + docs (ADR 0042 accepted)
End-to-end test over the real go-plugin transport: session data round-trips,
per-resource api_read gating returns PermissionDenied over the wire, cursor
pagination. Document the Host data API + SDK accessors in GRPC-CONTRACT.md,
reconcile the spec to shipped code, mark ADR 0042 accepted.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* feat(plugins): full session history + snapshot profile name in data API
Sessions().List now fetches tasks with includeArchived=true — an archived
task's sessions are still real sessions, and CodeStats already made the
same call at the SQL layer, so the two session reads were inconsistent
(26 of 359 sessions visible on a real instance). Tasks().List keeps
archived tasks excluded.
Session gains agent_profile_name (proto field 10) sourced from the
profile snapshot, so sessions of since-uninstalled agents keep a human
label — the AgentProfiles registry only lists live agents.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* docs(plugins): renumber Host data API ADR 0042 -> 0043
main merged its own ADR 0042 (project shell output); renumber this one to the
next free slot and update all references.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix(plugins): address Host data API review (perf, pagination, filters, proto)
- paginate before DTO conversion so per-session ACP lookups run <=limit times
- fetch all source pages (no silent 1000/workspace truncation); accurate HasMore
- stable id tiebreaker on paginated sorts
- AND SessionFilter.TaskIDs with WorkspaceIDs; exclude config-mode sessions from
CodeStats (shared dialect.ExcludeConfigModePredicate) so List/CodeStats match
- Get returns codes.NotFound consistently in-process and over the wire
- wrap bare-DTO RPC responses (GetTaskResponse etc.) for Buf response uniqueness
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* docs(plugins): mark Host data API plan tasks done
---------
Co-authored-by: Kandev Agent <agent@kandev.dev>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
* feat(workflow): explicit step-completion signal for auto-advance
Adds `step_complete_kandev` MCP tool + `WorkflowStep.auto_advance_requires_signal`
column so workflow steps can gate their `on_turn_complete` transitions on an
agent-emitted completion signal instead of inferring "done" from any turn-end.
See docs/decisions/0015-explicit-completion-signal-for-auto-advance.md for the
motivation, alternatives considered, and trade-offs.
* fix(workflow): address PR review feedback for explicit completion signal
- Dedup `LoadPendingStepSignal` into `internal/task/models` so the MCP
handler (write site) and the orchestrator (read site) share one decoder.
- Gate the out-of-band subscriber on `WorkflowStep.AutoAdvanceRequiresSignal`
so `step_complete_kandev` is not an unintended manual-advance path for
signalless steps.
- Fail closed on step-load errors in `processOnTurnCompleteViaEngine`: a
loader hiccup must block the transition rather than silently bypass the
gate.
- Reject `step_complete_kandev` for terminal sessions
(Completed / Failed / Cancelled) so the agent gets a clear error instead
of `accepted: true` followed by a no-op.
- Surface bus-publish failures back to the agent instead of swallowing
them — the idempotency guard makes the retry safe and prevents the
session from getting stuck.
- New `TestOnStepCompletionSignaled` covers the subscriber paths
(RUNNING / WAITING+match / stale step / not signal-gated).
- ADR doc fixes: payload field list now matches the wire shape, writer
ownership is documented, the unsubstantiated 250ms-debounce claim is
removed, and the late-signal re-close race is recorded as a deferred
open question.
- Drop the new toggle's HelpTip in favour of an inline description — the
shadcn tooltip portal was intercepting clicks on the agent-profile
dropdown options in the workflow settings E2E.
* fix(workflow): round-2 review fixes for explicit completion signal
- Split `handleStepComplete` into `resolveStepCompleteTarget` +
`publishStepCompletionEvent` helpers so the entrypoint clears funlen
(88 → under 80 lines) and the two halves are independently testable.
- Classify session/task load errors instead of returning `NotFound` for
every failure: use the exported `taskrepo.ErrTaskNotFound` sentinel for
task lookups, substring-match for the session repo (no sentinel today),
and surface anything else as `InternalError` with the raw error logged
but not leaked to the agent — so a transient DB hiccup triggers a retry
rather than session abandonment.
- Pin `step_complete_kandev` explicitly in the mode-specific tool-count
tests: `Contains` in `ModeTask`, `NotContains` in `ModeConfig` and
`ModeOffice`, so accidental dereg or cross-mode registration is caught
by the diff instead of by a still-equal count.
* fix(workflow): round-3 review fixes + defer pipeline-editor toggle
- Defer the "Wait for agent completion signal" sub-toggle to a follow-up
PR. Adding it to the step config card shifts the layout enough that the
agent profile select's Radix popper opens into a sibling tooltip's hover
path, breaking workflow-agent-profile.spec.ts on shard 7. The backend
column ships in this PR — workflows can opt in via the YAML import or
the MCP `update_workflow_step_kandev` tool — and the UI affordance gets
its own iteration where the test interference can be investigated
without blocking the rest of the change.
- Re-publish the bus event on the `already_signaled` short-circuit when
the session is WAITING_FOR_INPUT. Without this, an agent's retry after
the first call's publish failed would short-circuit on the persisted
bag, never fire the subscriber, and leave the session stuck.
- handleStepComplete docstring: drop the non-existent feature-flag claim
and the "audit entry" wording — gating is purely
`WorkflowStep.AutoAdvanceRequiresSignal` and the bag is cleared on the
next turn start with no separate audit trail.
- `step_complete_kandev` tool description: same fix — clarify that the
call succeeds for non-gated steps but the signal is discarded on the
next turn start (no audit history to query later).
* test(workflow): cover handleStepComplete + reword defer-comment
- Add `TestHandleStepComplete_*` (6 subtests, all passing) covering the
uncovered handler paths flagged by Claude/cubic on round 3:
missing-fields validation, session-does-not-belong-to-task ownership
guard, terminal-session rejection (Completed/Failed/Cancelled),
first-call happy path (bag persisted + bus payload shape pinned), dedup
while RUNNING (no re-publish), and dedup while WAITING_FOR_INPUT (the
retry-after-publish-failure path — must re-publish so the subscriber
fires).
- Reword the deferred-toggle comment to drop the YAML-export claim:
the workflow export model doesn't yet serialize
`auto_advance_requires_signal`, so MCP `update_workflow_step_kandev`
is the only configuration path that round-trips today. Note the
follow-up needs to extend the export schema alongside the UI toggle.
* test(workflow): pin signaled_at + drop redundant GetTaskSession on bag-clear
- Assert `signaled_at` is present and parses as RFC3339Nano in
`TestHandleStepComplete_FirstCallAccepted`. The field is part of the
handler's documented response contract; pinning it catches accidental
drop/rename regressions.
- Add `clearPendingStepSignalByID(ctx, sessionID)` as a thin DB-only
variant of `clearPendingStepSignal` and use it from
`executeStepTransition`, where the session struct isn't read after the
clear. Avoids an extra `GetTaskSession` round-trip per transition.
`clearPendingStepSignal(session)` still exists for the
in-memory-mutation case (subscriber's stale-step path).
* fix(workflow): subscriber stale-clear guard + ADR/comment drift fixes
- onStepCompletionSignaled's stale-step path now reads the bag and only
clears it when its current StepID matches the (stale) event's stepID.
Previously the unconditional clear could destroy a valid signal that
the new step's agent had just written when sessions are reused across
steps without auto_start_agent. (Greptile P1.)
- Drop the "feature flag" phrase from WorkflowStep.AutoAdvanceRequiresSignal
docstring — leftover from an earlier draft. The gating is purely the
boolean field; the global flag was removed two rounds ago.
- Merge the two adjacent `if triggerOnEnter` blocks in
executeStepTransition so the full triggerOnEnter=true path reads top-
to-bottom in one place. (CodeRabbit + cubic.)
- ADR 0015 Mechanism section: re-label the SessionStepHistory.Metadata
audit annotation, the `step_complete_signaled` system message, and the
expvar telemetry counters as deferred. They're planned shapes, not
current behaviour — calling them "Audit" / "Chat visibility" /
"Telemetry" in present tense was misleading for future readers.
* fix(workflow): drop subscriber complexity + reload session on stale-clear
- Extract `parseStepCompletionEvent` and `stepIsSignalGated` helpers from
`onStepCompletionSignaled`. Cyclomatic complexity goes 17 → under 15
(cyclop on new code, CI lint regression after the round-6
stale-clear guard).
- The stale-step branch now re-loads the session from the DB before
deciding whether to clear the bag. The previous round-6 fix checked
the local `session.Metadata` snapshot, which can be older than a
concurrent write from the new step's agent — that check could see a
stale signal that had since been overwritten with a valid one and
erase the new bag entry. The narrower load-on-clear is cheap and
closes the cubic P1 hole. (The broader race in
`processOnTurnCompleteViaEngine` reading session.Metadata is the
monotonic-marker open question in ADR 0015; out of scope here.)
* test(workflow): pin stale-event guard's preserve-current-bag side + dedup StringFromAny
- Add `TestOnStepCompletionSignaled` subtest "stale event → valid bag
for CURRENT step is preserved" — fires a stale step-A event while
the bag holds a valid step-B signal, asserts the bag still contains
StepID=step_b after the subscriber runs. Pins the negative side of
the round-6 `existing.StepID == stepID` guard, so a regression that
drops or inverts the guard (and would silently leave signal-gated
steps stuck) fails the test instead of slipping through.
- Promote `pendingSignalString` to exported `models.StringFromAny`
and reuse it from the orchestrator subscriber's
`parseStepCompletionEvent`. Eliminates the byte-for-byte duplicate
helper across the two packages; the bag-shape decoder and the bus-
event decoder now share one source of truth for "missing string".
---------
Co-authored-by: Kandev Agent <agent@kandev.dev>
João Salavisa