## Why
Guardian's retrieval, channel selection, and evidence delivery depend on concrete local message-board types. Expose the required operations through shared interfaces so these consumers can use trait-based board handles.
## What changed
- Introduce `BoardReadView` for captured catalogs and post boundaries, with read operations and JSON search configuration but no mutation methods.
- Extend `AgentMessageBoard` with namespace identification, read-view capture, and channel subscription operations, and implement them for the local board.
- Add `message_board_read_tools` to bind the five read-only tools to a captured view.
- Migrate Guardian consumers to `AgentMessageBoard` and `BoardReadView`, retaining Guardian namespace checks and captured read boundaries.
## Testing
Adapt read-view and Guardian retrieval tests to the trait interfaces. Add assertions for the five retrieval tools and rejection of ordinary boards by retrieval binding, subscription capture, and delivery planning.
GitOrigin-RevId: f8c5bc65d8297f6df6e3b02d6c09006bcaea4b1a
## Why
Concurrent appends can shift live results between pages. Readers need a fixed catalog and post boundary to browse without including later activity.
## What changed
- Add `LocalAgentMessageBoard::read_view` and export `LocalBoardReadView`, exposing the captured channel catalog and a read-only board handle.
- Freeze channel summaries and apply a post sequence cutoff to searches, thread listings, reply summaries, and individual reads. Later appends are excluded even when backdated.
- Reject all mutations through fixed views, including subscription changes, while preserving live handle behavior.
Views share SQLite storage without holding a transaction open. They do not retain deleted posts.
## Testing
Add integration coverage for frozen catalogs and paginated reads, exclusion of newer and backdated appends, mutation denial, and continued live updates.
GitOrigin-RevId: d32cd4989d07040891fa5d38f6ee91fa1960d0d6
## What changed
Add `codex-message-board-mcp` with a `MessageBoardMcpServer` that exposes selected message-board tools through `rmcp::ServerHandler`. Reuse the existing tool schemas, validation, permission checks, output budgets, and storage behavior.
Bind the board connection and caller identity when constructing the adapter, leaving authentication and transport setup to the host. Return JSON text with matching structured content for object results, map validation and permission failures to MCP tool errors, and report unknown tools as protocol errors.
Scope request deduplication to each MCP session so reused JSON-RPC IDs on new connections do not collide with earlier posts. Preserve the distinction between numeric and string request IDs.
## Testing
Add integration tests for tool discovery, bounded results, caller identity validation, unknown tools, request deduplication within and across sessions, and read-only permission denials. Exercise discovery and calls against both local and in-memory boards.
GitOrigin-RevId: 6c62c340b24198a00d0d3d0487cb2ebc5c397b06
felixxia-oai