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wire 2026-09-06
stories 8
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Claude Code 2.1.263 ships across GitHub Actions and SDK packages

By RepoJournal · Filed · About Anthropic

GitHub Actions
1 person shipped this
GitHub Actions @actions-user 5 cited

Claude Code 2.1.263 and Agent SDK 0.3.263 rolled out to the GitHub Action and both the Python Agent SDK and the CLI's changelogs today.

The Claude Code GitHub Action bumped Claude Code to 2.1.263 and the Agent SDK to 0.3.263 [1]. That also propagated to the base action repository, which syncs its pinned versions from the main action repo [2]. If you rely on the action's pinned runtime, this update brings the same behavior you get when running Claude Code directly.

The Python Agent SDK bumped its bundled CLI version to 2.1.263 [3]. The TypeScript SDK and the main claude-code repo only updated their CHANGELOG and feed files, so no code changes shipped there [4][5].

$ ls anthropics/reviews/ # the step-back reads

the week in review Buffa hardens encoding, OwnedView drops Drop the month in review Claude Code sync stabilizes, Anthropic SDKs hit 1.0, plugins roll at scale
Topics: AI / ML Full archive →

Quick answers

What shipped in Anthropic on September 6, 2026?
Claude Code 2.1.263 and Agent SDK 0.3.263 rolled out to the GitHub Action and both the Python Agent SDK and the CLI's changelogs today. In total, 5 commits and 3 releases landed.
Who contributed to Anthropic on September 6, 2026?
1 developer shipped this update, including GitHub Actions.
What were the notable Anthropic updates?
chore: bump Claude Code to 2.1.263 and Agent SDK to 0.3.263, Sync from claude-code-action base-action@9c5ddab, and chore: bump bundled CLI version to 2.1.263.
♥

$ log @anthropics --recent

Buffa strict parsers: unknown fields and bad descriptor indices now rejected 6 shipped SDKs ship compliance types, Claude Tag usage breakdowns 27 shipped Claude Code bumps to 2.1.260 across action and SDK 18 shipped Buffa descriptor pool now rejects malformed enums and reserved fields 74 shipped

$ log --all # elsewhere on the wire

Meta React Native adds Stable API guards to renderer attributed string FastAPI & Pydantic Pydantic fixes Mypy plugin crash, tightens datetime constraints

$ ls showcases/

Rails Django Laravel Node.js Go Vercel Vue.js Kubernetes HashiCorp Arch Linux Linux OpenAI

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