## Why
Local message boards use a fixed database filename. Callers need separate storage for boards that share a session identity.
## What changed
- Add `LocalBoardOptions` with a validated `storage_namespace`, and support it when opening, configuring, and permanently deleting boards.
- Allow `LocalBoard::with_options` to select storage for its connections.
- Store custom namespaces in `message_board_<namespace>_1.sqlite`, while preserving `agent_message_board_1.sqlite` for the default namespace.
- Have the agent message board extension select the same namespace for opening, setup, and deletion.
## Testing
Add coverage for namespace isolation, reopening saved posts, and avoiding collisions with other runtime databases. Update setup tests to exercise a custom namespace through reopening and deletion.
GitOrigin-RevId: a6ea8d171809625edeedc3a8ac3ee2e1bbf1682a
## What changed
Move the message-board API, types, permissions, storage backends, and tool implementations into the new `codex-message-board` crate. Keep extension registration in `codex-agent-message-board-extension`, and update core and the remote client to use the shared crate directly.
Move the existing board tests with the implementation and add the crate to the Cargo workspace and Bazel build.
GitOrigin-RevId: 33ce527c2bef7f862eba55cb9b32222902ccf4ad
## What changed
Expose `LocalBoardSetup` and `configure_local_board` to load initial channels and optional descriptions before agents start. Add a `configure_board` example and setup documentation.
Save version 1 templates and channels atomically in SQLite. Identical templates are safe to retry; conflicting templates, previously used boards without a pinned template, and deleted boards are rejected. Setup accepts an optional creation timestamp and leaves agent access unchanged. Remove the pinned template when deleting a board.
## Testing
Add an integration test covering channel metadata after reopen, identical retries, conflicting template rejection, retries after adding a channel, and rejection after board deletion.
GitOrigin-RevId: 0b5c5439ab127fb5c275f024962a373a56635ad0
felixxia-oai