19.0.0 (2026-02-27)
⚠ BREAKING CHANGES
- adapters: claude code ACP requires
claude-agent-acp(#2779)
Features
- adapters: improve caching in anthropic and add to copilot (#2798) (66aaa6a)
- chat: add new editor context items (#2780) (6e1bad4)
- chat: new agent mode with group system prompts (#2786) (a4e64ae)
- ci: add a container definition to run the CI toolchain (#2794) (4540978)
- per-project configuration (#2778) (ac042ea)
- prompt_library: can ensure no tools or mcp_servers are added to chats (#2785) (d8a3540)
- tools: fire an event when tool approval is requested (#2783) (0d2904d)
- ui: auto chat dimensions (#2753) (b36b76e)
- ui: open-in-tab chat/inline option (#2792) (57d5b7e)
Bug Fixes
- chat: editor context not displaying in the UI (#2801) (30859c0)
- tools: add additionalProperties: false recursively in enforce_strictness (#2790) (e54490a)