2.5 KiB
status, claimed-by, claimed-at, resolved-at, parent, blocked-by, tags
| status | claimed-by | claimed-at | resolved-at | parent | blocked-by | tags | ||
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| resolved | 019fc05b-7c70-7d68-af2b-89e9b6b17950 | 2026-08-01T22:44:20-04:00 | 2026-08-01T22:56:57-04:00 | 094-pi-subagent-result-delivery-spec-task |
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Pi subagent child activity capture
Question
Capture structured child RPC or session activity in the subagent runner and supervisor so last-activity summaries and read-only inspection can be driven from current-session state.
What to build
The child runner and supervisor should retain structured current-session activity events instead of only a coarse last event name.
The captured model should support concise last-activity summaries for status/list/widget output and preserve enough message and tool lifecycle information to render a basic Pi-like child transcript later.
Existing final-result collection through get_last_assistant_text should continue to work.
Acceptance criteria
- Child records retain structured activity events from RPC or session data.
- Activity capture includes enough message and tool lifecycle data to reconstruct a basic Pi-like child transcript.
- Status or list output can expose a concise current activity summary without dumping transcript bodies.
- Final result completion through
get_last_assistant_textstill works. - Tests cover event capture, ordering where relevant, and state updates.
Implementation Notes
Use the existing RPC event stream as the first feed.
Do not assume an embeddable promptless InteractiveMode exists.
Implemented on branch subagent-labels in commit ede3c05 feat(pi): capture subagent activity events.
The RPC runner now forwards structured event payloads, the supervisor retains full current-session activity events behind Supervisor.activity, and status/list/widget surfaces expose summary-only currentActivity and activityHistory data.
Verification passed with nix shell nixpkgs#nodejs_24 nixpkgs#tsx -c tsx --test modules/agents/pi/extensions/subagents/supervisor.test.ts modules/agents/pi/extensions/subagents/runner.test.ts modules/agents/pi/extensions/subagents/ui.test.ts modules/agents/pi/extensions/subagents/config.test.ts and nix flake check.
Review found no blocking findings.
A non-blocking risk note remains that full activity retention is unbounded in process memory for the current session.