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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 v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

Skill proposals no longer behind a remote flag

Use it now
Useful4 Signal4
Skills Notable not in their notes

Skill proposals no longer need a server flag; two environment variables now decide.

Feature flag
tengu_propose_skills 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 v2.1.251: not a boolean we can read

Read once, for one account on one subscription tier, against v2.1.251. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_SKILL_PROPOSALSCLAUDE_CODE_SYNC_SKILLS
What

The tool that proposes new skills used to require a server-side flag that defaulted off. That check is gone, so availability now rests entirely on the environment variables CLAUDE_CODE_SKILL_PROPOSALS and CLAUDE_CODE_SYNC_SKILLS.

Details
  • With neither variable set, the tool stays unavailable; the difference is that Anthropic can no longer switch it on remotely.
Evidence

if (!x("tengu_propose_skills", !1)) return !1;

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 v2.1.251 →