The model-name allowlist (`docs/model-allowlist.json`) ships
`gpt-5.4` and `gpt-5.4-mini` but never `gpt-5.2*` — the latter slipped
in during a model-bump cycle and was never caught because the CI
validator only scanned the legacy `docs/` tree.
- Sweep replace `gpt-5.2-mini` -> `gpt-5.4-mini` and `gpt-5.2` ->
`gpt-5.4` across `showcase/shell-docs/src/content/` (~17 files).
- Extend `scripts/validate-doc-model-names.ts` with an
`EXTRA_DOCS_DIRS` list so the validator now scans the shell-docs
content tree alongside the legacy Nextra tree under `docs/`,
preventing the same drift in future.
Allowlist-based CI lint that extracts model names from docs MDX code
blocks and validates against docs/model-allowlist.json. Catches stale
model references (gpt-5.2 after gpt-5.4 ships) before they reach users.
- Regex extraction from model="...", model: "...", provider/model patterns
- Provider prefix stripping (openai/, anthropic/, google/, etc.)
- 20 unit tests
Tyler Slaton