claude-code/CHANGELOG.md at main · anthropics/claude-code
github.com
Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you code faster by executing routine tasks, explaining complex code, and handling git workflo...

Three features from the latest Claude Code release that matter for personal automation systems:

1. PreToolUse defer pattern — Headless sessions can now pause at tool call boundaries and resume later with claude -p --resume. First-class async approval gate: run background tasks, pause at destructive operations, notify the human, resume when approved.

2. Autocompact thrash detection — After 3 consecutive context compactions that immediately refill, the session stops with an error instead of looping forever. Hook output over 50K chars saved to disk instead of context injection. Protects long-running automation from burning tokens with no progress.

3. PermissionDenied hook — When auto mode denies an action, a hook fires that can return {retry: true}, telling the agent to try a different approach. Enables self-healing automation.

Also: MCP_CONNECTION_NONBLOCKING=true flag prevents MCP connection timeouts from blocking headless tasks.

Source: Claude Code CHANGELOG v2.1.89-v2.1.90