Claude Code

A tag is a label with no lifecycle: it is for finding things. What rises and falls lives on the register instead.

• 2026-09-27 Claude Code 2.1.280 sets Opus 5.5 as the default Opus model, with a 1M-token window · Agents and tooling · 1 source
• 2026-09-26 Study finds most tested coding-agent harnesses let agents delete their own execution traces · Research worth knowing · 1 source