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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.277 ·

Session-inbox relayed messages can now carry attachments

Relayed session-inbox messages can now include attachments

Under the hood Improvements
JSON All of v2.1.277
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
ImprovementsKind: in v2.1.277,
ImprovementsSection of the release
What

Messages relayed through the session inbox (used for things like Slack messages reaching a session) can now carry attachments. The message event builder accepts an optional attachments argument and includes it in the message data sent to the session. The attachments field has also been added to the list of fields treated as untrusted, alongside the existing body, sender_display, and slack_permalink fields.

Why

This lets relayed messages carry file or media attachments rather than just text, while still treating that attachment data as untrusted input like the rest of the relayed message.

See this entry in the whole of v2.1.277 →

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