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Released September 24, 20261 new featureGitHub releaseCompare changes

New features

  • catalog Opus 5.5 and the September model launches, self-healing Claude Code fingerprint, refusals name their category #1647 · 7fb88b2

Newer release: v1.210.1

a describe’s subject no longer becomes a tool call, and an empty argv never panics a plugin

Previous release: v1.209.0

a refused turn falls back to a sibling model, and skill evolution shows on the dashboard