Mutation ledger
Mutation ledger is one of 28 measurements this engine publishes in full. It is regenerated from a real run rather than transcribed, and it is shown here with its own claim boundary so the number and its limits arrive together.
The measurement
- Guards mutated
- 20
- Guards over published claims
- 20
- Schema
- canli.alphac-mutation-ledger.v1
Coverage is derived. The guard set is computed from tests/unit by the same rule every run, so a guard added without a mutation appears here rather than joining the unmutated majority unnoticed.
Ledger
Nested beyond what this page renders. Read it in the artifact.
Negative controls
Nested beyond what this page renders. Read it in the artifact.
Why. A check that cannot fail is worse than no check: it produces the confidence of a guard with none of the protection, and a passing test looks identical whether it is watching something or nothing.
Check it yourself
Every figure above is read from /glassbox/mutation_ledger.json, the
artifact the engine wrote. Nothing on this page is typed by hand: the page is generated from that
file, so a figure that moves in the artifact moves here and a figure that is not in the artifact
cannot appear here at all.