Reading a new releasev2.1.251Analysing changes · 2/5Deeper second pass · 4/5 agents427 findings$12.75 so far
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.
The ExitPlanMode tool description now explicitly states it's only for plan mode: "present plan for approval and start coding (plan mode only)". An error message was also added: "You are not in plan mode. This tool is only for exiting plan mode after writing a plan."
Evidence
ExitPlanMode update (search for "present plan for approval and start coding (plan mode only)")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.