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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 v2.1.225 Home All releases ←olderv2.1.224 v2.1.226newer→
Claude Code v2.1.225

Heuristic classifier summaries are emitted without a flag

Under the hood
Useful2 Signal0
Telemetry

Lightweight conversation summaries are now always generated instead of needing a flag.

Feature flag
tengu_classifier_summary_llm_emit On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.225: 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.

tengu_classifier_summary_heuristic_emit On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.225: 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 v2.1.225. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Heuristic classifier summaries are now the unconditional fallback rather than needing their own flag turned on.

Details
  • the selector previously returned "llm" under one flag, "heuristic" under a second flag, and null otherwise
  • it now returns "heuristic" whenever the llm flag is off
  • tengu_classifier_summary_llm_emit still selects "llm", fallback false
  • tengu_classifier_summary_heuristic_emit no longer appears anywhere in the bundle
Evidence

tengu_classifier_summary_llm_emit

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

See this entry in the whole of v2.1.225 →