---
author: qa
responsible: qa
phase: 33
phase_type: verification
status: passed
gate_verdict: pass
committed_at: cb6063c
---

# Phase 33: Tag Hierarchy — Verification

**Verifier:** qa (independent — judge ≠ doer)
**Committed code:** cb6063c "Phase 33: Tag Hierarchy — cycle-safe parent/child hierarchy + grouped admin rendering"
**Goal (TF-03):** Tags form a cycle-safe parent/child hierarchy in the Phase-32 store, shown grouped in the admin list — display/organization only, no page rewrites.
**Verdict:** **passed** — goal-backward against code reality confirms every TF-03 criterion.

## Acceptance handshake

- Inputs complete: CONTEXT, PLAN, SUMMARY all present and consistent.
- PLAN ↔ SUMMARY consistency: SUMMARY claims match the symbols present in code
  (Meta.Parent, SetMeta parent param, CheckCycle, ValidateParent, handleTagMeta
  parent+cycle check, handleTagList parent, TagEntry.parent, grouped rendering).
- Goal verifiable: "reject cycles", "grouped display", "no page bytes changed",
  "rebuild parity" are all falsifiable by test/grep. ✓
- Lenses: none surfaced (CONTEXT confirms). No disciplines required.

## Evidence — verified against CODE REALITY (not SUMMARY)

### TF-03-1 — parent field + cycle rejection + root/orphan validity

- `internal/tagmeta/meta.go:19-24` — `Meta` struct has `Parent string` (doc:
  "normalized; '' = root, D-01/TF-03"). ✓
- `internal/store/migrations/0012_tag_meta_parent.sql` exists; line 4:
  `ALTER TABLE tag_meta ADD COLUMN parent TEXT NOT NULL DEFAULT '';` (additive). ✓
- `internal/tagmeta/store.go:345-368` — `CheckCycle` (exported):
  - `parent == ""` → nil (root, valid).
  - `parent == tag` → self-parent rejected (`"cycle — %q cannot be its own parent"`).
  - walks parent chain via `GetMeta`; revisiting `tag` → cycle reject;
  - chain exceeds `maxCycleDepth` (100) → corruption reject;
  - non-existent parent (`!ok`) → nil (treated as root, D-02b). ✓
- `store.go:121-152` — `SetMeta(tag, color, description, parent)`:
  validates `ValidateParent`, runs `CheckCycle` BEFORE the write (D-02a), then
  writes frontmatter + upserts cache with parent. ✓
- `internal/tagmeta/validate.go` — `ValidateParent` (charset gate; non-existent
  parent NOT rejected — D-02b). ✓ (confirmed via SUMMARY + referenced in store.go)

**Tests (ran, observed green):**
- `TestSetMetaWithParent` — sets deploy→ops; GetMeta returns parent="ops"; frontmatter
  contains `parent: ops`. ✓
- `TestCycleDetection_SelfParent` — parent="deploy" on "deploy" → error contains "cycle". ✓
- `TestCycleDetection_Indirect` — ops→infra→deploy chain; closing loop rejected. ✓
- `TestCycleDetection_DeepChain` — 50-tag chain valid; closing loop rejected. ✓
- `TestNonExistentParent` — parent="ghost" accepted; stored as-is; treated as root. ✓

`go test ./internal/tagmeta/ -count=1 -v` → 15/15 PASS (incl. 6 new). ✓

### TF-03-2 — grouped admin display + same endpoint as TF-02

- `internal/server/handlers_tags_admin.go`:
  - `tagMetaRequest.Parent` (line 91), `tagMetaResponse.Parent` (line 99). ✓
  - `handleTagMeta` (lines 817-827): normalizes parent, `ValidateParent`, then
    `h.tagmeta.CheckCycle(ctx, tag, parent)` → 400 on cycle (line 824-825),
    then `SetMeta(..., parent)` (line 831). Reuses the SAME `POST /admin/tags/meta`
    endpoint as TF-02 (admin-only + CSRF + validated, inherited from route subgroup). ✓
  - `handleTagList` (lines 723-759): `tagEntry` includes `Parent` (line 752); response
    populated from `AllMeta` lookup (line 757). ✓
- `web/src/api/client.ts`: `TagEntry.parent?: string` (line 1371); `setTagMeta`
  opts `parent: string` (line 1446). ✓
- `web/src/components/admin/TagManagement.tsx`:
  - Grouped rendering (lines 58-86): `tagSet`, `roots` (no parent or orphaned parent
    not in set → root per D-02b), `childrenByParent` Map; flat render order root→children
    indented (depth 0/1). ✓
  - Child rows: `↳` tree marker + `(parent: X)` note (lines 118-120). ✓
  - `TagMetaDialog` Parent `<select>` (lines 611-619): vocabulary minus self (line 566
    filters `t !== tag.tag`); "— root (no parent) —" option for empty. ✓
- `web/src/components/admin/TagManagement.css:251-265` — `.tagmgmt-child-row`,
  `.tagmgmt-tree-marker`, `.tagmgmt-parent-note` styles. ✓

**Tests (ran, observed green):**
- `TestTagHierarchySetParent` — admin sets parent=ops on deploy; GET /admin/tags
  shows deploy with parent="ops". ✓
- `TestTagHierarchyCycle` — ops→infra; set ops's parent=infra → 400. ✓
- `TestTagHierarchySelfParent` — parent="deploy" on deploy → 400. ✓
- `TestTagHierarchyRootTag` — parent="" on deploy → valid (root). ✓

`go test ./internal/server/ -run TestTagHierarchy -count=1 -v` → 4/4 PASS. ✓
`go build ./...` → exit 0. ✓
`cd web && npx tsc --noEmit` → exit 0. ✓

### TF-03-3 — display-only (no auto-apply, no search expansion, no page bytes changed)

- `grep 'parent' internal/search/` → **no matches**. No search-expansion logic. ✓
- `grep 'parent' internal/pages/` → only filesystem-path parents
  (`rename.go:126` `path.Dir`, `service.go:261` CreateFolder parent dir,
  `tree.go:63` `path.Dir`). None reference tag-hierarchy `parent`. No auto-apply. ✓
- Hierarchy edits route through `handleTagMeta` → `SetMeta` which writes ONLY
  `Tags/{tag}.md` frontmatter (metadata file), never any wiki page. No page bytes
  changed by a hierarchy edit. ✓

### TF-03-4 — rebuildable-from-disk parity

- `store.go:238-302` — `RebuildTagMeta` parses the `parent` frontmatter key
  (`parseMetaFile` line 304-322 handles parent) and repopulates the cache column. ✓
- `TestRebuildParityWithParent` (lines 468-509): seeds 3-tag hierarchy, rebuilds,
  snapshots; deletes `tag_meta` table, rebuilds, asserts `reflect.DeepEqual(after,
  before)`; asserts exact expected `[]Meta` with correct Parent values. ✓

`go test ./internal/tagmeta/ -run TestRebuildParityWithParent -count=1 -v` → PASS. ✓

## TF-03 criteria checklist

- [x] Tag declares parent (or none); store rejects cycles + self-parenting; root/orphan valid
- [x] Admin tag list displays grouped parent→children; hierarchy edits use same admin endpoint as TF-02
- [x] Hierarchy is display-only (no auto-apply, no search expansion, no page bytes changed)
- [x] Rebuildable-from-disk parity holds

## Gaps

None. All four TF-03 acceptance criteria are satisfied by committed code reality.

## gate_result

```
verdict: pass
gate: TF-03
committed_at: cb6063c
evidence_tier: high (SMTC-grounded reads + test runs observed green)
remediation_owner: none
```