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ai-artifacts/projects/dotfiles/051-pi-subagents-status-ui-task.md

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---
status: resolved
claimed-by: "019fba91-eabf-76ae-b086-a37ac061d6e8"
claimed-at: "2026-08-01T14:36:01-04:00"
completed-at: "2026-08-01T14:44:11-04:00"
parent: "[[027-pi-subagents-implementation-spec-task]]"
blocked-by:
- "[[046-pi-subagents-minimal-tracer-bullet-task]]"
tags:
- ticket/task/afk
---
# Add durable status milestones and optional Pi-native status UI
## Question
Connect the public status model to durable milestone entries and an optional Pi-native status UI without making the UI required for status or result retrieval.
## What to build
Add the presentation layer around the existing status data model.
The extension should append durable lifecycle milestones, show a collapsed live summary by default, offer an expanded inspector, and keep the UI replaceable by another extension.
Disabling the bundled UI should not disable status records, status events, or tools.
## Acceptance criteria
- [x] Spawn accepted, completed, failed, cancelled, and timed-out milestones are appended as durable entries.
- [x] Milestone entries do not inject child transcripts into normal LLM context.
- [x] The collapsed UI summary shows live counts.
- [x] The expanded inspector shows child id, label, context, state, elapsed time, model, tools, last event, and result availability.
- [x] Disabling `ui` hides bundled UI components but leaves list, status, result, and cancel tools working.
## Implementation Notes
Use the status data model as the source of truth.
Do not stream every child event into the parent transcript.
Resolved in branch `pi-subagents-tracer-bullet`, commit `e7a700f`.
Added durable `subagent_milestone` custom entries for accepted, completed, failed, cancelled, and timed-out states, a replaceable widget-based collapsed summary, and `/subagent-ui` expanded inspector toggle.
The widget is gated by config `ui.enabled`, while tools remain available regardless.
Verified milestone entries in live Pi RPC batch/fork smoke, command registration, tests, and `nix flake check`.