---
issue: 98
issue_title: "Explore a shared permission frontmatter convention for pi-subagent extensions"
---

# Retro: #98 — Explore a shared permission frontmatter convention for pi-subagent extensions

## Final Retrospective (2026-05-05T23:35:00Z)

### Session summary

Planned, implemented, and shipped a docs-only change for issue #98.
Delivered two guide documents (`docs/guides/permission-frontmatter-for-subagent-extensions.md` and `docs/guides/upstream-issue-template.md`) plus linking from `README.md` and `docs/architecture/target-architecture.md`.
Released as v5.3.1 with no rework or corrections.

### Observations

#### What went well

- All four prerequisites (#78, #29, #96, #97) were verified closed in a single parallel `gh issue view` call — efficient context gathering.
- Existing docs (`docs/subagent-integration.md`, `docs/event-api.md`) were read before writing the guide, so content was grounded in actual implementation rather than invented.
- The three-step build plan mapped 1:1 to commits with no deviations.
- CI passed on first push; release-please PR was `MERGEABLE`/`CLEAN` and merged without issues.

#### What caused friction (agent side)

- None observed.
  The issue was well-scoped, all prerequisites were landed, and the deliverable was unambiguous documentation.

#### What caused friction (user side)

- None observed.
  The issue body provided clear tasks, explicit prerequisites, and no ambiguous design choices.