## What
Completes **ag-cw2y item 1's scaffold-half + item 2**. A
newly-scaffolded skill is now one-shot-green against the two gates that
silently tripped `/burndown` #600:
1. missing `skill-dispositions.yaml` row → `heal.sh` Check 12
(`MISSING_DISPOSITION`, shipped #609)
2. stale `"N checked-in skills"` narrative counts →
`check-registry-drift`
## How
- **`scripts/append-skill-disposition.sh`** — idempotent helper that
appends a dispositions row (valid `BC4 Factory` placeholder + TODO
rationale, so `check-bounded-contexts-drift` passes; author refines
during content fill). Repo-root-injectable → fixture-testable.
- **`init.sh`** — after scaffolding, calls the helper *and* runs
`check-registry-drift.sh --fix-counts` to bump the narrative skill-count
tokens. Both calls are guarded + WARN-on-failure so they never break the
scaffold.
## Discovery (scope-narrowing)
Item 2's **check + `--fix-counts` already existed** and were wired into
both the fast pre-push gate (line 1330) and CI (line 803). The only gap
was that **skill-builder never invoked them** — so the fix is wiring,
not a new check.
## Tests (TDD, red→green)
`tests/scripts/append-skill-disposition.bats` — appends row / valid BC +
TODO / idempotent / no-dup-on-existing. 4/4 green. shellcheck clean.
## Codex artifact
Refreshed **only skill-builder's** source/generated hash (6 unrelated
pre-existing `main` drifts left untouched). PR-scope
`validate-codex-generated-artifacts --scope head` passes.
## ag-cw2y remaining
Item 1 (check #609 + scaffold here) ✅ · Item 2 (here) ✅ · **Item 3**
(codex desc budget / `ag-vzbt`) and **Item 4** (override-catalog
scaffold + `test-codex-override-coverage`) remain — then `ag-hdqu0.8`
and `/burndown` #600 are fully one-shot-green.
Closes-scenario: ag-cw2y#skillbuilder-scaffold-dispositions-counts
Bounded-context: BC4-factory
Evidence: tests/scripts/append-skill-disposition.bats
Bo