bf-4r6 (Write AGENTS.md) was blocked on bf-40i (Wire main()), but
documentation writing does not require main() to be functional.
Removing this dependency makes bf-4r6 ready for a worker to claim.
bf-52c's dependency on bf-40i remains correct — binary E2E tests
genuinely require a working binary.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
