Truth Source Broken (negative fixture)
This fixture is intentionally broken at the TRUTH layer (not the structural layer):
its grounding block is complete and valid, but one declared truth source path does
not exist on disk. The drift sentinel MUST classify it BROKEN (exit non-zero).
Concept of the skill
What it is: A deliberately broken capability skill used only by the conformance runner. Mental model: Keep the frontmatter structurally valid but declare a truth source that is missing on disk. Why it exists: To give the truth/drift gate's BROKEN state a failing example — the drift gate had no unit coverage before this suite. What it is NOT: It is not a production skill and never routes outside the test runner. Adjacent concepts: the structural negative fixtures under this directory; drift detection; truth-source hashing. One-line analogy: It is a citation pointing at a page that was torn out. Common misconception: That a missing truth source is a structural (lint) failure — it is a TRUTH (drift) failure; the drift sentinel owns it.
Coverage
Valid grounding except a missing declared truth source path → drift BROKEN.
Philosophy of the skill
One broken layer per fixture keeps the failing assertion unambiguous.
Verification
Exercised by the gate-conformance runner via the drift gate; expected to report BROKEN and exit non-zero.
Do NOT Use When
- Always. This is a test fixture, not a usable skill.