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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 v2.1.246 25 Aug 2026

Environment variable to replay the first-launch experience

Use it now

Useful4 Signal3

Startup Notable not in their notes

Set CLAUDE_CODE_FORCE_FIRST_LAUNCH to replay the fresh-install startup experience.

CLAUDE_CODE_FORCE_FIRST_LAUNCH

What

CLAUDE_CODE_FORCE_FIRST_LAUNCH makes startup behave as if this were a fresh install. Set it to a version string to pretend that was the last version seen, or to any truthy value to pretend nothing was seen. Unset by default.

Details

Once the first-launch screen has been shown, the current build number is stored, which is what the variable overrides.

Usage

CLAUDE_CODE_FORCE_FIRST_LAUNCH=1 claude

Evidence

CLAUDE_CODE_FORCE_FIRST_LAUNCH

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

See this entry in the whole of v2.1.246 →