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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.242 ·

The binary is now genuinely code-split

Onboarding, worktrees, tmux, Bedrock, Vertex and more now load on demand instead of at startup.

Under the hood Internal Changes
JSON All of v2.1.242
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
BundleArea: what it touches
Internal ChangesKind: in v2.1.242,
Internal ChangesSection of the release
What

Deferred module loads across the CLI, onboarding, worktree and tmux launch, Chrome MCP wiring, machine-id lookup, the SDK, Bedrock, Vertex and Foundry clients, sandbox install, the daemon hub and AWS SSO now load separate chunk files on demand instead of running an inline initialiser. Nothing behaves differently; first-use cost for those paths moves from module init to loading a chunk.

Details
  • Hundreds of module-init wrappers were removed and their contents inlined or relocated.
  • The worktree launch path now pins storage and initialises the debug log and feature-flag credentials before handing off.
Evidence

HOOKS_WORKER_URL, await import("/$bunfs/root/chunk-XXXXXXXX.js")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.242 →

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