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 v2.1.223 Home All releases olderv2.1.222 v2.1.224newer

Remote-control attachments can be inlined as image blocks

Not switched on
Useful2 Signal3
Remote Control Notable

Images sent from remote control could be inlined instead of passed as file paths, but that is off.

Inline image blocks for bridge attachments are built but gated on a flag falling back to false, so paths are still used.

Feature flag
tengu_bridge_inline_image_attachments 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 v2.1.223: 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 v2.1.223. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Image attachments on bridge and remote-control messages can be downloaded and sent as content blocks instead of @path references, but the path is switched off in this build.

Details
  • attachment resolution now returns { prefix, imageBlocks } rather than a bare prefix string
  • gated on tengu_bridge_inline_image_attachments, whose in-source fallback is false, so absent a server value attachments keep using path references
  • when inlining fails it falls back to the path reference and reports telemetry bridge_attachment_inline_image with a fallback_path_ref variant
Evidence

tengu_bridge_inline_image_attachments

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

See this entry in the whole of v2.1.223 →