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FAQ

Why prove that a program does nothing?

Because the universe of "no-op" candidates is huge and most of them aren't no-ops. A for i in 1..1e9 loop that increments and decrements a counter looks like a no-op until you notice it heats the CPU. Formal verification draws the line: a program is a CNO iff a machine-checkable proof says so, in a model that captures the side-effects you care about (state, I/O, and entropy).

Why six proof systems?

Each catches what the others miss. A property proved in Coq + Lean + Agda + Isabelle + Mizar + Z3 doesn't depend on any single backend's foundational quirks. When something is provable only in some, that tells you something about the foundational dependency. See Proof Systems.

Why is Idris2 here separately from proofs/?

src/abi/ is the FFI surface, not a proof system in its own right — it carries formal alignment + size proofs for the C ABI used by the Zig shim. See ABI.

What's the difference between an Axiom and an Admitted?

  • Axiom (Coq) / axiom (Lean) / believe_me () (Idris2 0.8.0): an asserted proposition. Permanent unless discharged.
  • Admitted (Coq) / sorry (Lean) / ?hole (Idris2): a placeholder in a proof, marking incomplete work. Should not ship.

absolute-zero core: 0 Admitted, 73 Axioms + 42 Parameters, all owner-classified.

Why is examples/python / examples/go / examples/java missing?

Deleted 2026-05-25 per the strict CLAUDE.md language policy. See Contributing. The CNO concept generalises across languages; the demonstrations now cover the 23 still-allowed ones.

Where do I file issues?

hyperpolymath/absolute-zero/issues. For audit / trust-escape findings, use the existing AUDIT.adoc issue template; for proof discharges, the regular issue template + an ADR plan.

How do I talk to ECHIDNA from a script?

Through the echidna-llm-mcp BoJ cartridge — never directly. See the ECHIDNA tool table in 0-AI-MANIFEST.a2ml.

Is the Coq proof complete?

Core theory: yes (11/11 files compile, 0 Admitted). Model-layer assumptions (Parameters about abstract physics, quantum, POSIX) are owner-classified — these are intended axiomatisations of the external world, not gaps in the verification of the computational claim.

Where's the live state?

.machine_readable/6a2/STATE.a2ml. Updated on every meaningful change.

Why "Absolute Zero"?

The thermodynamic analogy: at 0 K, a system has no entropy to release. A CNO is a program at "computational absolute zero" — it has no side-effect entropy to release into the world.