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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 v2.1.239

Command-line flag parsing rewritten around an explicit table of value-taking flags

Use it now
Useful4 Signal2
CLI

Flags that take values no longer swallow or drop their arguments, and -- is handled.

--tools--mcp-config--betas--channels--plugin-dir
What

Argument scanning now knows which flags take one value and which take a list, so options like --tools, --mcp-config, --betas, --channels, --plugin-dir and --file no longer swallow or lose their arguments. It also handles -- when locating the first positional argument.

Details
  • Flags that are boolean but accept an optional value, such as -r, --worktree, --cloud and --rc, are tracked separately.
  • cc:// and cc+unix:// targets are recognised as session addresses.
  • Detecting -p/--print now goes through the same shared helper as everything else.
Evidence

--dangerously-load-development-channels

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 v2.1.239 →