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Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.257 ·

New X-Frame-Session-Id header on outgoing requests

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Outgoing requests now carry a frame session id header.

TierUnder the hoodhow much it should matter to you
Useful2my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaNetworkwhat it touches
KindInternal Changesin v2.1.257,
Under the hood No documentation found

Outgoing requests now carry a frame session id header.

Outgoing requests now include an X-Frame-Session-Id header, sourced from a session/frame id helper with fallback to a generated id.

Read from
Names in the bundleX-Frame-Session-Id

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