git:20260903.e2bbae2 to git:20260903.8fd1723

4 added, 4 removed. Audit A to A.

# Internal tooling
A small monorepo of CLI helpers. Build with `make build`; the binaries land
in `dist/` and are published from CI, never from a developer machine.
- The session hooks below pull the shared toolchain installer, which is how
- new checkouts get the pinned `protoc` without a manual step. The second
- hook runs a checked-in script on Unix and falls back to the installer on
- Windows through `commandWindows`.
+ The session hooks in `.codex/hooks.json` pull the shared toolchain
+ installer, which is how new checkouts get the pinned `protoc` without a
+ manual step. The second hook runs a checked-in script on Unix and falls
+ back to the installer on Windows through `commandWindows`.