Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.227 Home All releases olderv2.1.226 v2.1.228newer
Claude Code v2.1.227

Cross-session file transfer is gated off with a specific message

Not switched on
Useful2 Signal3
Cross-Session Messaging

Sending files between sessions now fails with a clear "not available in this session" message.

The file-transfer gate is off unless a server flag enables it, and refusals are logged as gated_off.

Feature flag
tengu_send_file Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.227: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.227. It isn't a statement about your account. What a flag value here can and cannot tell you

What

The tool that sends files between sessions now checks a capability gate before doing anything. When it is off it returns error code 9 with the message "Cross-session file transfer is not available in this session." and records telemetry with transport "gated_off" and zero files delivered. The gate is tengu_send_file, off unless the server enables it, and the surrounding capability check must also pass.

Details
  • in the previous build tengu_send_file was only a telemetry event name; both the gate and the unavailable message are new here
Evidence

Cross-session file transfer is not available in this session.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.227 →