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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

Output style and language reminders assembled per turn

Under the hood
Useful2 Signal3
Output Styles

Output style and language reminders are built per turn and skipped for bare forked sessions.

What

A new step builds per-turn context injections carrying output-style instructions and language, but only for main and teammate agents or subagents belonging to the main session, and it is skipped entirely for bare forked sessions.

Details
  • Sits behind an internal enablement check, so it does not run in every session.
Evidence

type: "output_style_instructions"

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 →