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

Peer messages are admitted through a new loop and abuse guard

You'll notice
Useful3 Signal0
Peer Messaging not in their notes

Incoming peer messages now pass rate, duplicate and loop checks before queuing, with drops shown to you.

Feature flag
tengu_harbor_kite_limits 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: not a boolean we can read

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

tengu_harbor_kite_limits
What

Incoming peer messages are checked before they reach the queue, so a runaway relay chain or a flood from one sender is dropped rather than processed.

Details
  • checks are a per-sender token bucket, a duplicate-body window, a self-hop loop detector, a relay-chain length cap, and a cap on queued peer messages
  • built-in defaults: bucketCapacity 30, refillPerSecond 0.5, dedupWindowMs 30000, maxSelfHops 10, maxChainLength 28, maxTrackedSenders 256
  • limits are read from remote config key tengu_harbor_kite_limits and fall back to that built-in defaults object
  • rejections surface to the user as a drop notice and are counted in telemetry
Evidence

message has already passed through this session (a peer messaging loop)

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 v2.1.223 →