# Phase 24: LLM-Generated Description (ED-01a/ED-01b) — VERIFIED (pass)

**Verdict:** pass. All 10 must-have truths hold against real code + full re-run. No gaps up.
Commits `14ed93e e58f071 b4338a4 7773904 b634050` on main. No SUMMARY existed — verified
goal-backward against the commit range per the task instruction (acceptable: code is truth).

## Key facts for future audits
- **Validator placement drifted from the plan (not a gap):** `ValidateDescription` lives in
  `internal/agent/describe.go:67`, not the plan's tentative `internal/okf/charset.go`. The
  byte-stable scalar write is `pages.SetFieldFrontmatter` (`internal/pages/batch.go:251`) →
  `okf.SetField` (`repair.go:124`), mirroring `SetTagsFrontmatter`. `okf.Repair`/`charset.go`
  ZERO diff in range → ED-01a's "Repair unchanged" holds.
- **Server re-validation is the load-bearing fact:** `handleApplyDescription`
  (`handlers_agent.go:926`) writes the `cleaned` return of `agent.ValidateDescription`, NEVER
  `req.Description` verbatim → 422 on invalid. Verify by reading the variable handed to the
  write, not just the test name.
- **GenerateDescription single caller proof:** SMTC `find_name_occurrences` → only non-test
  call site is `handlers_agent.go:873`. That's how "never auto-runs" is proven server-side.
- **D-08 both CLOSED** (the two caveats I carried from Phase 23):
  - D-08a misattributed 409 copy → `fromOwnApply` + self-expiring `OWN_APPLY_409_WINDOW_MS`
    (PageEditor.tsx:57/99/291/744-752); window reset on save/resolve so external 409s read right.
  - D-08b missing interleave test → "an apply landing while a body save is in flight 409s as
    OWN-apply, stays data-safe, and is attributed" — holds body save in flight, lands apply,
    releases 409-on-own-apply, asserts accurate copy + Overwrite preserves description.

## Pattern worth remembering
- **Phase 24 generalized the Phase-23 reconcile into a shared `reconcileApplied(merge, errMsg)`**
  helper (PageEditor.tsx:417); `reconcileAppliedTags`/`reconcileAppliedDescription` are thin
  wrappers. Merge-first ordering (merge into frontmatterRef BEFORE getPage) is preserved, so the
  Phase-23 data-loss bug cannot reappear without breaking the shared helper. No pre-fix worktree
  run needed this time — it's reuse of an already-proven helper, exercised by the new tests.

## Evidence numbers
- go build/vet/test ./... exit 0. Fresh agent+server (-count=1) ok. New: TestValidateDescription,
  TestGenerateDescription, TestApplyDescription{StaleRevision,RevalidatesServerSide,RBAC,
  BadRequest,MissingCSRF}, TestGenerateDescriptionEndpoint.
- web: `npx vitest run` 604/604 across 55 files (DescriptionGenerate 8, PageEditor 19,
  adversarial 9). `npm run build` clean exit 0. dist/.gitkeep deleted by vite emptyOutDir →
  restored (recurring gotcha; not a defect).
- Tier: evidence smtc_honest, reasoning manual_review (mixed Go+TS; LSP Decision not load-bearing).

Artifact: `.planning/phases/24-llm-generated-description/24-VERIFICATION.md`
