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https://github.com/openai/codex/blob/main/docs/contributing.md
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## Summary
- add an `--experimental` flag to the export binary and thread the
option through TypeScript and JSON schema generation
- flatten the v2 schema bundle into a datamodel-code-generator-friendly
`codex_app_server_protocol.v2.schemas.json` export
- retarget shared helper refs to namespaced v2 definitions, add coverage
for the new export behavior, and vendor the generated schema fixtures
## Validation
- `cargo test -p codex-app-server-protocol` (71 unit tests and bin
targets passed locally; the final schema fixture integration target was
revalidated via fresh schema regeneration and a tree diff)
- `./target/debug/write_schema_fixtures --schema-root <tmpdir>`
- `diff -rq app-server-protocol/schema <tmpdir>`
## Tickets
- None
