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docs: v3.27.3 — track Claude Code v2.1.42 + Google Antigravity section

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- Claude Code releases: v2.1.41 → v2.1.42 (startup perf, prompt cache, Opus 4.6 effort callout)
- New AI ecosystem section: Google Antigravity agent-first IDE comparison
- Version sync across all docs (3.27.2 → 3.27.3)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Florian BRUNIAUX 2026-02-16 09:38:31 +01:00
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guide/claude-code-releases.md
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@ -10,7 +10,7 @@ tags: [reference, release]
> **Full details**: [github.com/anthropics/claude-code/CHANGELOG.md](https://github.com/anthropics/claude-code/blob/main/CHANGELOG.md)
> **Machine-readable**: [claude-code-releases.yaml](../machine-readable/claude-code-releases.yaml)
**Latest**: v2.1.41 | **Updated**: 2026-02-13
**Latest**: v2.1.42 | **Updated**: 2026-02-16
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@ -25,6 +25,14 @@ tags: [reference, release]
## 2.1.x Series (January-February 2026)
### v2.1.42 (2026-02-14)
- **Improved**: Startup performance via deferred Zod schema construction (faster on large projects)
- **Improved**: Prompt cache hit rate by moving date outside the system prompt (avoids daily cache invalidation)
- **New**: Opus 4.6 effort callout for eligible users (one-time onboarding)
- Fixed: `/resume` showing interrupt messages as session titles
- Fixed: Image dimension limit errors now suggest using `/compact` instead of opaque failure
### v2.1.41 (2026-02-13)
- **New**: `claude auth login`, `claude auth status`, `claude auth logout` CLI subcommands