Source Intelligence

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 v2.1.140 Home All releases olderv2.1.139 v2.1.163newer
Claude Code v2.1.140

Plan Mode Requires a Context Section

What

When writing a plan in plan mode, Claude is now instructed to begin with a Context section explaining why the change is being made before listing implementation steps.

Details
  • The Context section must describe: the problem or need being addressed, what prompted the change, and the intended outcome.
  • This addition helps reviewers understand the motivation before reading the technical steps.
  • The rest of the plan format is unchanged (recommended approach, file paths, utilities to reuse, verification steps).
Evidence

Phase-4 plan instructions (search for "Begin with a Context section: explain why this change is being made")

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

See this entry in the whole of v2.1.140 →