Selfhost and contributing

Change GenesisCode without weakening its semantic identity or trust boundaries.

Preserve the language while replacing the implementation

Read before changing

• AGENTS.md for non-negotiable invariants.
• Selfhost boundary for authority ownership.
• Translation validation for tier equivalence.
• Value/effect hashing before any hash-visible change.
• Versioning before modifying a serialized contract.

Change protocol

1. Identify the normative authority and compatibility surface.
2. Add or update executable semantic evidence first.
3. Implement in libraries rather than adding kernel special forms.
4. Prove native, WASI, WASM, compiled, and selfhost parity where applicable.
5. Keep generated artifacts behind explicit update commands; checks must be read-only.
6. Run no-panic, determinism, topology, and source-size controls.
7. Record migration and rollback when identity changes are unavoidable.

Selfhost principle

Rust stage0 remains a bootstrap and host boundary, not semantic authority for migrated domains. Demotion requires differential parity, bootstrap fixpoint, target portability, and a clear deletion/rollback gate.