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 v2.1.219 Home All releases olderv2.1.218 v2.1.220newer
Claude Code v2.1.219

The decisions island's opening bytes are now a named constant, and reserved page-wide

Under the hood
Useful1 Signal1
Skills

Workshop pages would be rejected at publish if they mention the decisions marker more than once.

The island marker constant and its uniqueness rule only matter behind the workshop skill gate, which is off.

What

The literal island-open sequence is lifted into a module-level constant next to the templates, and the skill text makes its uniqueness on the page a hard rule.

Details
  • Island extraction scans for exactly that byte sequence, so the verifier refuses any page where the scan and the real island could disagree.
  • An author page mentioning the island id anywhere else, in a quoted example or an attribute, fails the publish instead of being silently mis-extracted.
  • Only reachable behind the workshop skill gate, which is off here.
Evidence

id="ws-decisions">

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

See this entry in the whole of v2.1.219 →