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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.

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Claude Code v2.1.251

Directory-sync streaming keyed off an environment variable

Use it now
Useful3 Signal3
Directory Sync Notable not in their notes

Directory sync streams changes live unless you set an environment variable to turn streaming off.

CLAUDE_CODE_DIR_SYNC_STREAM
What

Whether directory sync streams changes is decided by CLAUDE_CODE_DIR_SYNC_STREAM. The check is an inversion, so streaming runs unless the variable is set to turn it off.

Details
  • The surrounding sync feature is not otherwise exposed in this build, so the variable matters only where sync is active.
Evidence

CLAUDE_CODE_DIR_SYNC_STREAM

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 →