Claude Code v2.1.126 → v2.1.159: what changed
27 releases shipped between v2.1.126 (April 30, 2026) and v2.1.159 (May 31, 2026).
Changelog entries in this range
- v2.1.128 — May 4, 2026: - Bare /color (no args) now picks a random session color - /mcp now shows the tool count for connected servers and flags servers that connected with 0 tools - -
- v2.1.129 — May 5, 2026: - Added --plugin-url <url> flag to fetch a plugin .
- v2.1.131 — May 6, 2026: - Fixed VS Code extension failing to activate on Windows due to a hardcoded build path in the bundled SDK (createRequire polyfill bug) - Fixed Mantle endpoint a
- v2.1.132 — May 6, 2026: - Added CLAUDECODESESSIONID environment variable to the Bash tool subprocess environment, matching the sessionid passed to hooks - Added CLAUDECODEDISABLEALTERN
- v2.1.133 — May 7, 2026: - Added worktree.baseRef setting (fresh | head) to choose whether --worktree, EnterWorktree, and agent-isolation worktrees branch from origin/<default> or local
- v2.1.136 — May 8, 2026: - Added CLAUDECODEENABLEFEEDBACKSURVEYFOROTEL to re-enable the session quality survey for enterprises capturing responses through OpenTelemetry - Added settings
- v2.1.137 — May 9, 2026: - [VSCode] Fixed extension failing to activate on Windows
- v2.1.138 — May 9, 2026: - Internal fixes
- v2.1.139 — May 11, 2026: - Added agent view (Research Preview): a single list of every Claude Code session — running, blocked on you, or done. Run claude agents to get started. See http
- v2.1.140 — May 12, 2026: - Improved Agent tool subagenttype matching to accept case- and separator-insensitive values (e.g. "Code Reviewer" resolves to code-reviewer) - Updated agent co
- v2.1.141 — May 13, 2026: - Added terminalSequence field to hook JSON output so hooks can emit desktop notifications, window titles, and bells without a controlling terminal - Added CLAU
- v2.1.142 — May 14, 2026: - Added new claude agents flags: --add-dir, --settings, --mcp-config, --plugin-dir, --permission-mode, --model, --effort, and --dangerously-skip-permissions to
- v2.1.143 — May 15, 2026: - Added plugin dependency enforcement: claude plugin disable now refuses when another enabled plugin depends on the target (with a copy-pasteable disable-chain
- v2.1.144 — May 18, 2026: - Added /resume support for background sessions — sessions started via claude --bg or agent view now appear alongside interactive ones, marked with bg - Added e
- v2.1.145 — May 19, 2026: - Added claude agents --json to list live Claude sessions as JSON for scripting (tmux-resurrect, status bars, session pickers) - Added agentid and parentagentid
- v2.1.146 — May 20, 2026: - Renamed /simplify to /code-review with an optional effort level (e.g. /code-review high) - Auto mode no longer suppresses AskUserQuestion when the user or a s
- v2.1.147 — May 21, 2026: - Pinned background sessions (Ctrl+T in claude agents) now stay alive when idle, are restarted in place to apply Claude Code updates, and are shed under memory
- v2.1.148 — May 22, 2026: - Fixed the Bash tool returning exit code 127 on every command for some users (a regression introduced in 2.1.147)
- v2.1.149 — May 22, 2026: - /usage now shows a per-category breakdown of what's driving your limits usage — skills, subagents, plugins, and per-MCP-server cost - /diff detail view can no
- v2.1.150 — May 23, 2026: - Internal infrastructure improvements (no user-facing changes)
- v2.1.152 — May 26, 2026: - /code-review --fix now applies review findings to your working tree after the review, surfacing reuse, simplification, and efficiency suggestions; /simplify n
- v2.1.153 — May 27, 2026: - Added skipLfs option to github/git plugin marketplace sources to skip Git LFS downloads during clone and update - Claude Code now shows a one-time notice when
- v2.1.154 — May 28, 2026: - Opus 4.8 is here! Now defaults to high effort · /effort xhigh for your hardest tasks - Introducing dynamic workflows: ask Claude to create a workflow and it o
- v2.1.156 — May 28, 2026: - Fixed an issue when using Opus 4.8 where thinking blocks were modified, leading to API errors.
- v2.1.157 — May 29, 2026: - Plugins in .claude/skills directories are now automatically loaded, no marketplace required - Added claude plugin init <name> to scaffold a new plugin in .cla
- v2.1.158 — May 30, 2026: - Auto mode is now available on Bedrock, Vertex, and Foundry for Opus 4.7 and Opus 4.8. Opt in by setting CLAUDECODEENABLEAUTOMODE=1
- v2.1.159 — May 31, 2026: - Internal infrastructure improvements (no user-facing changes)
All Claude Code releases · v2.1.126 release · v2.1.159 release