# Phase 33: Tag Hierarchy - Discussion Log

> **Audit trail only.** Do not use as input to planning, research, or execution agents.

**Date:** 2026-07-02
**Phase:** 33-tag-hierarchy
**Areas discussed:** (no interactive discussion — phase has no genuine gray areas)

**Notes:** Phase 33 extends the Phase-32 store with a `parent` field + cycle detection + grouped admin rendering. No design fork — the store shape is locked by Phase 32, the cycle-detection algorithm is standard, and the display-only scope is mandated by TF-03. All decisions were derived from the ROADMAP + REQUIREMENTS + the Phase-32 CONTEXT.

## Claude's Discretion

- The exact grouped rendering shape (indented list vs tree vs collapsible sections).
- Whether a non-existent parent is an error or treated as root.
- Whether `SetParent` is separate or folded into `SetMeta`.
- Commit slicing.

## Deferred Ideas

None — discussion stayed within phase scope.