Claude Code v2.1.287
Claude Code v2.1.287 was released on .
Summary
Claude Code 2.1.287 now lets plugins modify deeper behavior with Claude Mods, and introduces an opt-in "You Should Know" agent that watches your back to catch things you might miss. We've also improved session filtering, added support for URL prompts from MCP servers, and fixe...
Release Context
- This was the 231st Claude Code release of 2026 tracked by Havoptic.
- It shipped 1 day after Claude Code v2.1.286 (September 30, 2026).
- Claude Code: ships every 1.4 days — 27 releases in the last month.
Why it matters: Claude Mods let plugins reshape how Claude works.
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- Antigravity CLI v1.2.16 (October 3, 2026)
- Antigravity CLI v1.2.15 (October 2, 2026)
- OpenAI Codex CLI rust-v0.160.0 (October 1, 2026)
- GitHub Copilot CLI v1.0.91 (October 1, 2026)
- Kiro CLI v2.27.0 (October 1, 2026)
Compare Claude Code: vs OpenAI Codex CLI · vs Cursor · vs Gemini CLI · vs Kiro CLI · vs GitHub Copilot CLI · vs Devin Desktop · vs Antigravity CLI · vs Grok Build
Release Notes
- Added Claude Mods: plugins may now modify deeper behavior
- Added You should know, an opt-in plugin where a side agent watches your back and flags things you or Claude might miss. Turn it on with /plugin enable cc-plugin-you-should-know@builtin (for first-party sessions with telemetry on)
- Added an n:<text> filter to the agents view that matches session names and tasks; a filter now shows matches in collapsed sections and Enter opens the first match
- Added prompttext to the OpenTelemetry userprompt event, a copy of prompt for backends that nest dotted keys; drop or mask it wherever you drop or mask prompt (anthropics/claude-code70763)
- Added URL prompts from MCP servers on the 2025-11-25 protocol, for example to sign in. If a server no longer connects after this update, add "bareElicitationCapability": true to its MCP config entry
- Windows: Added a startup warning when denying the Bash tool also turns off the PowerShell tool, so Claude has no shell tool
- Self-hosted runner: Added a built-in gh api (REST only) for sessions that use Anthropic-managed git on macOS and Linux machines where the GitHub CLI is not installed
- Fixed fast mode staying off in remote sessions owned by an agent with no user account, even when the organi
Other Recent Claude Code Releases
- v2.1.289 (October 3, 2026)
- v2.1.285 (September 29, 2026)
- v2.1.284 (September 28, 2026)
- v2.1.283 (September 25, 2026)
- v2.1.282 (September 24, 2026)
All Claude Code releases · All AI coding tool releases on Havoptic