Follow Discord
Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.280 ·

correctionAttachment added to REPL/tool routing

REPL/tool routing for cloud sessions gains a new "correctionAttachment" field

Under the hood Internal Changes
JSON All of v2.1.280
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Tool RoutingArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What

The internal routing information used when executing tool calls in a cloud-hosted or remote-capable session now includes a correctionAttachment field, alongside the existing noticeAttachment field.

Why

This is internal plumbing for how tool execution results get attached back to a session; the finding does not describe what a correction attachment contains or when it appears.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding does not say what a correction attachment is used for or when it is populated.

See this entry in the whole of v2.1.280 →

Feedback