Claude Code version 2.1.259 introduces several new configuration options and fixes a wide range of stability issues in session management and tool execution.
- Added `managedMcpServers` setting allows organizations to provision HTTP/SSE MCP servers for all users.
- Introduced `--permission-prompts none` flag to automatically deny prompts in unattended headless hosts.
- Added recognition for GitLab merge requests, displaying them as `MR !N` in the tool summary.
- Fixed concurrent sessions silently reverting each other's `~/.claude.json` changes and workspace trust resets.
- Resolved issues with Bash `Read()` deny rules not covering file operands or directory compounds.
- Corrected behavior where `CLAUDE_CODE_MAX_CONTEXT_TOKENS` was ignored for unrecognized Vertex-style model IDs.
- Improved terminal resize performance by reusing text measurements and speeding up headless session starts.
These updates enhance enterprise control over MCP server access, improve reliability in automated workflows, and fix critical bugs affecting session state and tool permissions.