Four CLI tools and runtime dependencies have new versions available requiring updates.
Update Summary
| Tool |
Current |
Latest |
Priority |
Release Date |
| Claude Code |
2.1.34 |
2.1.39 |
Medium |
Feb 10, 2026 |
| GitHub Copilot CLI |
0.0.405 |
0.0.406 |
Medium |
Feb 7, 2026 |
| Sandbox Runtime |
0.0.34 |
0.0.37 |
Low |
Feb 10, 2026 |
| Playwright Browser |
v1.58.1 |
v1.58.2 |
Low |
Feb 6, 2026 |
Status: constants.go has been updated in pkg/constants/constants.go:307,312,383,389
Next Steps: Complete make recompile to regenerate workflow lock files after Go proxy access is restored.
Claude Code (2.1.34 → 2.1.39)
Release Timeline: 5 patch versions released over 4 days (Feb 6-10, 2026)
Intermediate Versions: 2.1.34 → 2.1.36 → 2.1.37 → 2.1.38 → 2.1.39
- Note: 2.1.35 was skipped in the release sequence
Key Features
- New
--effort flag: Control effort level for sessions (low, medium, high)
- Added in version 2.1.38
- Provides fine-grained control over AI resource allocation per session
CLI Changes
+ --effort (level) Effort level for the current session (low, medium, high)
Discovered via: Comparing cached help outputs from 2.1.34 and 2.1.38
View Full Changelog
Release History
- 2.1.39: Feb 10, 2026 21:12 UTC
- 2.1.38: Feb 10, 2026 00:06 UTC
- 2.1.37: Feb 7, 2026 18:39 UTC
- 2.1.36: Feb 7, 2026 17:25 UTC
- 2.1.34: Feb 6, 2026 06:38 UTC
Impact Assessment
- Risk: Low (patch versions, single new flag)
- Affects: Session configuration, effort control
- Breaking Changes: None detected
Package Links
GitHub Copilot CLI (0.0.405 → 0.0.406)
Release Date: February 7, 2026
Breaking Changes
None
Key Features
- Claude Opus 4.6 Fast (Preview): Support for the latest Claude model variant
/changelog command: View release notes directly from the CLI- Plugin marketplace URLs: Plugin commands now accept URLs as sources
--no-experimental flag: Disable experimental features when needed- MCP tool status:
/mcp show displays enabled/disabled status for MCP tools
Bug Fixes
- Markdown formatting now displays correctly in non-interactive mode output
- Warning displayed when users lack Copilot subscriptions
- CLI interface renders without extra blank lines
- Plugin commands translated into skills
Enhancements
- MCP tool responses now feature structured content including images and resources for enhanced VS Code UI display
View Full Changelog
Release Highlights (from GitHub)
Published: February 7, 2026
The latest release introduces several enhancements:
- Support added for Claude Opus 4.6 Fast (Preview)
- Markdown formatting now displays in non-interactive mode output
- Warning displayed when users lack Copilot subscriptions
- Plugin commands are translated into skills
- New
/changelog command for viewing release notes
- Plugin marketplace accepts URLs as sources
--no-experimental flag to disable experimental features- CLI interface renders without extra blank lines
/mcp show displays enabled/disabled status for MCP tools- MCP tool responses now feature structured content including images and resources for enhanced VS Code UI display
Impact Assessment
- Risk: Medium (new model support, CLI interface changes)
- Affects: Model selection, MCP tool management, plugin system
- Breaking Changes: None
Recommendations
- Integration Testing: As noted in constants.go:311, upgrading Copilot CLI requires a full integration test run to ensure compatibility
- Test Areas: Focus on model selection, MCP tool configuration, and plugin marketplace functionality
Package Links
Sandbox Runtime (0.0.34 → 0.0.37)
Release Date: February 10, 2026 23:41 UTC
Note: Version jumped from 0.0.34 to 0.0.37, skipping 0.0.35 and 0.0.36
Release Timeline
- 0.0.34: Feb 2, 2026 10:40 UTC
- 0.0.37: Feb 10, 2026 23:41 UTC (8 days later)
View Full Changelog
Changes
No public changelog or GitHub releases available for this NPM-only package. The repository at https://github.com/anthropic-experimental/sandbox-runtime does not publish GitHub releases.
Impact Assessment
- Risk: Low (internal runtime dependency)
- Affects: Anthropic Sandbox Runtime (ASRT) security boundaries
- Breaking Changes: Unknown (no public changelog)
Package Links
Playwright Browser (v1.58.1 → v1.58.2)
Release Date: February 6, 2026
Breaking Changes
None
Key Features
None - maintenance release
Bug Fixes
- Trace Viewer Fix: Make paths via stdin work
- Chromium Mac Fix: Do not force swiftshader on chromium mac
Browser Versions
- Chromium 145.0.7632.6
- Mozilla Firefox 146.0.1
- WebKit 26.0
View Full Changelog
Release Highlights (from GitHub)
Release Date: February 6, 2026
Highlights
Browser Versions
- Chromium 145.0.7632.6
- Mozilla Firefox 146.0.1
- WebKit 26.0
Impact Assessment
- Risk: Low (bug fixes only)
- Affects: Trace viewer functionality, Chromium on macOS
- Breaking Changes: None
Package Links
Implementation Status
Completed
- ✅ Version research and changelog analysis
- ✅ Updated pkg/constants/constants.go with new versions
- ✅ Saved version check results to cache-memory
Blocked
- ⏸️
make recompile blocked by Go proxy access (Forbidden errors from proxy.golang.org)
- ⏸️ Workflow lock file regeneration pending build success
Next Actions
- Restore Go Proxy Access: Resolve Forbidden errors when accessing proxy.golang.org
- Complete Build: Run
make recompile to regenerate workflow lock files
- Validate Changes: Verify workflow compilation succeeds
- Integration Testing: Run full test suite, especially for Copilot CLI upgrade
References:
AI generated by CLI Version Checker
Four CLI tools and runtime dependencies have new versions available requiring updates.
Update Summary
Status: constants.go has been updated in pkg/constants/constants.go:307,312,383,389
Next Steps: Complete
make recompileto regenerate workflow lock files after Go proxy access is restored.Claude Code (2.1.34 → 2.1.39)
Release Timeline: 5 patch versions released over 4 days (Feb 6-10, 2026)
Intermediate Versions: 2.1.34 → 2.1.36 → 2.1.37 → 2.1.38 → 2.1.39
Key Features
--effortflag: Control effort level for sessions (low, medium, high)CLI Changes
+ --effort (level) Effort level for the current session (low, medium, high)Discovered via: Comparing cached help outputs from 2.1.34 and 2.1.38
View Full Changelog
Release History
Impact Assessment
Package Links
GitHub Copilot CLI (0.0.405 → 0.0.406)
Release Date: February 7, 2026
Breaking Changes
None
Key Features
/changelogcommand: View release notes directly from the CLI--no-experimentalflag: Disable experimental features when needed/mcp showdisplays enabled/disabled status for MCP toolsBug Fixes
Enhancements
View Full Changelog
Release Highlights (from GitHub)
Published: February 7, 2026
The latest release introduces several enhancements:
/changelogcommand for viewing release notes--no-experimentalflag to disable experimental features/mcp showdisplays enabled/disabled status for MCP toolsImpact Assessment
Recommendations
Package Links
Sandbox Runtime (0.0.34 → 0.0.37)
Release Date: February 10, 2026 23:41 UTC
Note: Version jumped from 0.0.34 to 0.0.37, skipping 0.0.35 and 0.0.36
Release Timeline
View Full Changelog
Changes
No public changelog or GitHub releases available for this NPM-only package. The repository at https://github.com/anthropic-experimental/sandbox-runtime does not publish GitHub releases.
Impact Assessment
Package Links
Playwright Browser (v1.58.1 → v1.58.2)
Release Date: February 6, 2026
Breaking Changes
None
Key Features
None - maintenance release
Bug Fixes
Browser Versions
View Full Changelog
Release Highlights (from GitHub)
Release Date: February 6, 2026
Highlights
Trace Viewer Fix: "make paths via stdin work"
(fix(trace viewer): make paths via stdin work microsoft/playwright#39121)
Chromium Mac Fix: "do not force swiftshader on chromium mac"
(fix: do not force swiftshader on chromium mac microsoft/playwright#39129)
Browser Versions
Impact Assessment
Package Links
Implementation Status
Completed
Blocked
make recompileblocked by Go proxy access (Forbidden errors from proxy.golang.org)Next Actions
make recompileto regenerate workflow lock filesReferences: