v2.1.204

Source: Anthropic Claude Code Date: 2026-07-08 URL: https://github.com/anthropics/claude-code/releases/tag/v2.1.204

Summary

A one-line patch: v2.1.204 fixes hook events failing to stream during SessionStart hooks in headless sessions, a bug that could cause remote workers to be idle-reaped mid-hook. It shipped the same day as v2.1.205, continuing the pattern of Anthropic issuing small, targeted fixes to background/headless infrastructure rather than batching them into weekly releases.

Implications

Feeds the harness autonomy-sprint thread. This is exactly the class of fix that arc has been accumulating for weeks — background-agent and daemon reliability rather than user-facing features. A hook-streaming stall that gets a session idle-reaped mid-run is a real failure mode for unattended/scheduled agents specifically, so the fix matters more to autonomous-loop reliability than to interactive use. Small as it is, it’s consistent evidence the sprint is still open: Anthropic is still finding and closing gaps in headless/remote execution rather than treating that surface as done.