Imported from michaelblum/agent-os (tests/fixtures/legacy-sigil/product/AGENTS.md). Install upstream with npx skills add michaelblum/agent-os --skill product. Copyright stays with the author.

@../../../AGENTS.md

Frozen Legacy Sigil Fixture

Authority

Active Sigil product authority lives in Ch-osctrl/sigil. This test-only tree is a frozen compatibility and proof fixture, not an AOS application source root.

Invariants

• Do not add product features, launch instructions, recipes, packaging, or live runtime acceptance here.
• Do not restore aos-app.json, an active experience manifest, content-root registration, or a compatibility alias.
• Fixture bytes may change only for an explicit compatibility rebaseline. Any such change must update the machine-readable baseline and deterministic proof.
• Product behavior tests belong in the external Sigil repository. AOS may test only fixture integrity and generic substrate contracts.

Verification

Run the non-live fixture proof registered under docs/dev/test-proof-registry.d/legacy-sigil-fixture.json.