Add checkpoints and assessment revisions.

⛰️ Features

• (acp) Add checkpoints and assessment revisions (#903)
• (acp) Persist canonical session trajectories (#902)
• (cli) [breaking] Rename the invocation to bro
• (config) Add provider header policies (#910)
• (control) Add remote router administration (#901)
• (evolution) Add checkpoint TS routing (#907)
• (mcp) Add native skills gateway support (#912)
• (registry) Automate canonical model lifecycle (#876)
• (tui) Adopt native scrollback (#904)
• (tui) Replace dashboard with conversation
• (tui) Improve scrollback and transcript rendering (#899)

🐛 Bug Fixes

• (codex) Preserve ACP tools through Responses (#892)
• (update) Delegate managed installs (#898)

🚜 Refactor

• (mcp) Remove OSS origin server (#913)

📚 Documentation

• Correct MCP spend report command (#911)

⚙️ Miscellaneous Tasks

• Sync registry catalog (#914)

• Breaking (MCP): remove the OSS first-party origin server. The bitrouter-mcp crate, bro mcp serve, bro mcp install, daemon /mcp-control endpoint, and automatic bitrouter_skills injection are removed. Local agents operate BitRouter through the shipped Agent Skill and structured bro CLI. The upstream MCP client/gateway, aggregate /mcp, Skills-over-MCP relay/cache, server-side tool loop, and bro mcp check remain.

• Breaking (CLI): the invocation is now bro. bitrouter <cmd> becomes bro <cmd>. Only the invocation changed — the product, crate, npm package, Homebrew tap, bitrouter.yaml, ~/.bitrouter, BITROUTER_* environment variables, brk_ key prefix, and telemetry identifiers keep their names. Shell, PowerShell, npm, and Homebrew installers additionally create a deprecated bitrouter alias; invoking it prints one migration note on stderr while preserving structured stdout. The alias is installer-only, release archives contain bro, and the alias is removed in 1.0.0.