A source map shipped in the v2.1.88 npm release: about 1,884 files under src/, original names and comments intact. So I walked the core modules and checked what everyone "knows" about how Claude Code works against what the code actually does.
Half of it was wrong. Including things I'd repeated myself.
I did not read it line by line. Nobody reads 1,884 files line by line. I walked the key modules and tied every claim to something concrete: a function, a constant. So you'll see names like queryLoop and AUTOCOMPACT_BUFFER_TOKENS below. Real identifiers, so every claim is checkable against the public teardowns, not vibes.
This is a map of how it works, not a dump of its guts. I don't quote internal prompts, and anything that only runs in Anthropic's internal builds is flagged as such.
Myth 1: "The agent recursively calls itself on every tool result"
