* 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>
João Salavisa
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