The user-directed third generation pass closes the audit's remaining
tail: the code-intelligence CLI's options/status/suggest surfaces get
behavioral coverage through the fake-shim chain; brain-context-load
gains an argv-logging trap that goes red if anyone reverts the memoized
PATH scan back to the spawn probe (receipt: simulated revert failed
exactly these tests); the darwin Keychain auth branch (#1890) gets its
first free-tier tests via a PATH-shimmed security binary; and the gbrain
add/delete/export ops are pinned (body piped byte-for-byte, receipt
sha256, stdin-EOF prompt guard, PROVIDER_UNAVAILABLE degradation) —
retiring their TODOS entry.