megachangelog
Improvement2.1.201

Claude Sonnet 5 sessions no longer use mid-conversation system role for harness reminders

Claude Sonnet 5 sessions have been updated to remove the use of mid-conversation system roles for harness reminders, simplifying the conversation flow and behavior.

  • Claude Sonnet 5 sessions no longer use the mid-conversation system role for harness reminders
claude-sonnetsessionssystem-roleimprovement

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Fix2.1.294

Fixed prompt and agent hooks handling for instruction-based blocking

Fixed a bug where prompt and agent hooks written as blocking instructions were not working correctly. Improved evaluation of Stop and SubagentStop hooks so Claude is less likely to stop early when hooks are written as conditional instructions.

hooksprompt-engineeringagentsfix
Announcement2.1.293

Claude Code 2.1.293

Released version 2.1.293 with Claude Haiku 5.5 as the default Haiku model featuring 1M context window, expanded agent functionality with agentType and isDeferred fields, and numerous bug fixes across context management, MCP connections, vim mode, permissions, and cloud sessions.

releasemodelsapiagentbugfixes
Announcement2.1.292

Claude Code 2.1.292 Release

Claude Code 2.1.292 includes new features like marketplace source support for plugin installation, effort parameters for agent tools, and prompt caching for mods. This release also addresses numerous security fixes including permission bypass issues, file access restrictions, and cache tampering vulnerabilities, plus improvements to session handling, auto mode restoration, and various UI/UX fixes.

securityfeaturesfixesimprovementsstability
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