Claude Code v2.1.51

Released Feb 24, 2026 (6 months ago).

94 issues reference this build

2 still open

92 resolved (98%)

"References this build" means the issue body mentions running 2.1.51 (from the bug-report template). It reflects report volume, not a proven defect count — an issue may mention a version without being caused by it. First-party data from the anthropics/claude-code tracker.

Top issues reported on v2.1.51

Ranked by community engagement (reactions and comments).

[BUG] `claude remote-control` shows misleading "Contact your administrator" error for personal (Pro/Max) accounts
Resolved 💬 74 👍 79 #28098
claude --worktree: .claude/ subdirectories (skills, agents, docs, rules) not copied to worktree
Open 💬 7 👍 25 #28041
[BUG] Plugins not loading
Open 💬 7 👍 15 #29047
[BUG] command 'claude-vscode.editor.openLast' not found
Resolved 💬 16 👍 9 #28053
VS Code extension v2.1.51: commands not found (claude-vscode.editor.openLast)
Resolved 💬 19 👍 5 #28060
[BUG] Claude Desktop - Code mode - macOS: Tahoe 26.3
Resolved 💬 12 👍 6 #30717
VS Code extension v2.1.51 fails to activate on Windows: hardcoded Linux CI path in extension.js
Resolved 💬 9 👍 5 #28081
[BUG] command 'claude-vscode.editor.openLast' not found Extension fails to activate on Windows - hardcoded Linux path in sdk.mjs
Resolved 💬 9 👍 4 #28076
[BUG] Windows: clicking Claude icon gives "command 'claude-vscode.editor.openLast' not found" - reinstalling VS Code and extension doesn't fix it
Resolved 💬 15 👍 1 #28112
[BUG] VS Code extension with version 2.1.51 (anthropic.claude-code-2.1.51-win32-x64) fails to activate on Windows
Resolved 💬 6 👍 3 #28281
[BUG] Error: command 'claude-vscode.editor.openLast' not found at pit.n (commandService.ts:95:26)
Resolved 💬 3 👍 4 #28105
[BUG] VS Code extension fails to activate on Windows — hardcoded Linux path in extension.js
Resolved 💬 8 👍 2 #28056
[BUG] command 'claude-vscode.editor.openLast' not found on every startup - requires full reinstall to fix
Resolved 💬 4 👍 3 #28453
[BUG] cost_usage_total metric applies Opus pricing to Sonnet 4.6 model
Resolved 💬 7 👍 2 #28168
[BUG] VS code latest extension bug
Resolved 💬 4 👍 3 #28097
[BUG] Remote Control: "is not yet enabled for your account" persists for Max user across all documented troubleshooting steps
Resolved 💬 7 👍 1 #61890
[BUG] Cowork forces claude-opus-4-6[1m] (1M context) causing instant rate limit errors on Max plan
Resolved 💬 10 #33154
[BUG] `EINVAL: invalid argument` on Bash tool - output file creation fails on Windows (non-C: drive)
Resolved 💬 4 👍 2 #28344
[BUG] Last update 2.1.51 trashed my VS Code setup
Resolved 💬 10 #28109
[BUG] VS Code extension v2.1.51 fails to activate on Windows due to hardcoded Linux path
Resolved 💬 4 👍 2 #28072
Claude Code for VS Code 2.1.51 fails to launch
Resolved 💬 10 #28070
Windows activation failure: createRequire invalid file URL breaks command registration in 2.1.51-2.1.53
Resolved 💬 5 👍 1 #28365
[BUG] Extension fails to activate on Windows - hardcoded Linux path in extension.js
Resolved 💬 5 👍 1 #28111
[BUG] Claude Code v2.1.51 fails to activate on Windows
Resolved 💬 2 👍 2 #28099
VS Code extension v2.1.51 fails to activate on Windows - hardcoded Linux CI paths in extension.js
Resolved 💬 5 👍 1 #28073
[BUG]
Resolved 💬 4 👍 1 #28463
[BUG] **claude-vscode.editor,openLast not found
Resolved 💬 7 #28122
[BUG] VS Code extension v2.1.51 fails to activate on Windows — hardcoded Linux CI paths in extension.js
Resolved 💬 4 👍 1 #28100
[BUG] command 'claude-vscode.editor.openLast' not found
Resolved 💬 7 #28063
[BUG] [Windows] rm -rf on pnpm project deleted entire C:\Users via NTFS junction traversal — Claude Code v2.1.51
Resolved 💬 6 #36339

Changelog

What's changed

Added claude remote-control subcommand for external builds, enabling local environment serving for all users.
Updated plugin marketplace default git timeout from 30s to 120s and added CLAUDE_CODE_PLUGIN_GIT_TIMEOUT_MS to configure.
Added support for custom npm registries and specific version pinning when installing plugins from npm sources
BashTool now skips login shell (-l flag) by default when a shell snapshot is available, improving command execution performance. Previously this required setting CLAUDE_BASH_NO_LOGIN=true.
Fixed a security issue where statusLine and fileSuggestion hook commands could execute without workspace trust acceptance in interactive mode.
Tool results larger than 50K characters are now persisted to disk (previously 100K). This reduces context window usage and improves conversation longevity.
Fixed a security issue where HTTP hooks could interpolate arbitrary environment variables from header values. Env var interpolation now requires an explicit allowedEnvVars list in the hook configuration.
Fixed a bug where duplicate control_response messages (e.g. from WebSocket reconnects) could cause API 400 errors by pushing duplicate assistant messages into the conversation.
Added CLAUDE_CODE_ACCOUNT_UUID, CLAUDE_CODE_USER_EMAIL, and CLAUDE_CODE_ORGANIZATION_UUID environment variables for SDK callers to provide account info synchronously, eliminating a race condition where early telemetry events lacked account metadata.
Fixed slash command autocomplete crashing when a plugin's SKILL.md description is a YAML array or other non-string type
HTTP hooks are now routed through the sandbox network proxy when sandboxing is enabled, enforcing the domain allowlist. HTTP hooks are not supported for SessionStart/Setup events.
The /model picker now shows human-readable labels (e.g., "Sonnet 4.5") instead of raw model IDs for pinned model versions, with an upgrade hint when a newer version is available.