Claude Code v2.1.274
Claude Code v2.1.274 was released on .
Summary
Claude Code 2.1.274 now alerts you when memory is running critically low with clear steps to free up space or safely restart. We've also fixed a frustrating bug where sessions could get stuck endlessly retrying errors—corrupted transcripts now self-heal automatically. See what...
Release Context
- This was the 219th Claude Code release of 2026 tracked by Havoptic.
- It shipped 1 day after Claude Code v2.1.273 (September 15, 2026).
- Claude Code: ships every 1.1 days — 31 releases in the last month.
Why it matters: Stop wasted time, free critical memory instantly.
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- OpenAI Codex CLI rust-v0.155.0 (September 17, 2026)
- GitHub Copilot CLI v1.0.86 (September 17, 2026)
- Antigravity CLI v1.2.5 (September 17, 2026)
- Antigravity CLI v1.2.4 (September 16, 2026)
- GitHub Copilot CLI v1.0.85 (September 16, 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 a visible warning when memory usage is critical, with steps to free memory or restart safely
- Added CLAUDECODEMCPSTARTUPWAITMS to bound how long the first non-interactive turn waits for connecting MCP servers (0 = don't wait)
- Added effort attribute to the claudecode.llmrequest OpenTelemetry trace span, matching the apirequest event
- Added claudecode.managedsettingsresolved OTel event: managed-settings sources and policy helper state; redacted settings and digests with OTELLOGMANAGEDSETTINGS=1
- Added store.connecttimeoutseconds to the Claude apps gateway config to lengthen the Postgres connect timeout (default 5 seconds), and improved the boot error when the database is unreachable to point to store.postgresurl and the configured timeout
- Added enduser.sub, the IdP subject, to the telemetry Claude Desktop and Cowork send through a Claude apps gateway
- Added a Claude apps gateway warning when a replica has more requests open than the 256 it sends upstream at once, and a startup log line showing that limit
- Added click-to-expand for collapsed teammate and agent messages in fullscreen mode
- Fixed sessions getting stuck endlessly retrying "unexpected tooluseid" 400 errors: corrupted transcripts now self-heal where possible, and otherwise a clear error (with a /rewind hint) ends the loop
- Fixed MCP servers configured as http that only speak legacy HTTP+SSE failing to connect when they answer the first request with 422 or another 4xx error
- Fixed Streamable HTTP MCP tool calls timing out after about 5 minutes even when a longer per-server timeout was set
- Fixed MCP prompts and resources not refreshing when a server sends list-changed notifications without declaring listChanged
- Fixed MCP tool calls refused with 403 insufficientscope being reported as an expired sign-in: the error now names the missing permissions and points to /mcp re-authentication
- Fixed hook-driven sessions (such as an active /goal) ending with "Prompt is too long" instead of compacting when the context overflowed again after a reactive compaction
- Fixed an active /goal being lost when resuming (--continue / --resume) a session that had compacted
- Fixed claude agents losing --model, --effort, --permission-mode, --allow-dangerously-skip-permissions and --agent after an auto-update relaunch
- Fixed a per-turn slowdown when a language server publishes project-wide diagnostics for thousands of files
- Fixed subagents with model: "opus" on Bedrock, Vertex or Foundry leaving the session's model when its id has no recogni
Other Recent Claude Code Releases
- v2.1.272 (September 14, 2026)
- v2.1.271 (September 14, 2026)
- v2.1.270 (September 12, 2026)
- v2.1.269 (September 11, 2026)
- v2.1.268 (September 10, 2026)
All Claude Code releases · All AI coding tool releases on Havoptic