---

title: e2e:operator_clause_drop status: active verification_scope: end_to_end verification_perspective: consumer proof_contract: version: kibi.proof-contract.v1 integration: unit required_proofs:

symbol_id:SYM

target: default success_policy: all_required_first_attempt origin: kind: agent recorded_at: '2026-10-29T17:50:59.485Z' id: TEST-e2e-operator-clause-drop type: test proof_receipts:

version:kibi.proof-receipt.v2

receipt_id: PR-049190bc8c5a95765408a343 test_id: TEST-e2e-operator-clause-drop scope: end_to_end outcome: passed code_snapshot: 2f6e624f3911adb9cf78f8559299244a7a72fc7e02ca53c4319289bab545b210 environment_hash: 70794eb189f6bb0bd59b638fedca584356a0b61f01329f6f9f4e9f53a3b5be53 started_at: '2026-10-29T18:05:48.772Z' finished_at: '2026-10-29T18:06:25.804Z' artifact_digest: 11c7c63d178616c342276a172c41f3f1f4545f5bd37c1e205f6c5b6c8490153c contract_hash: 653c5ca48a8b02d2e48b39dd70d59cfdedd0f189368179dea05983a5e061331e binding_hash: 96584ef687b679e2307bc934c28f29e2a7b60ed9d262654afbdebb6ea8196f29 fingerprint: baef30739a004b02e770386745cbea07e35620387f0f54f504e2d6a28033a75b fingerprint_components: contract: 653c5ca48a8b02d2e48b39dd70d59cfdedd0f189368179dea05983a5e061331e integration: c737391e036529661d1133ede485cc0c7e0cd44f13a68e4ca3ca4ce96e583b98 command: c9ec4783a29134c6c0d1c8e48e18a94e22343779b220e65da267bcaebe14f40b bindings: 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945 producer: 3f1ef45ea6f7a150dff44ba43ea098e729d8dcd4e35f67bb455191a7f38609be integration_id: unit producer: name: kibi-command-producer command_argv:

• npx
• kibi
• proof
• run-steps

run_outcome: passed proof_results:

symbol_id:SYM

target: default outcome: passed binding: aggregate_run attempts: status: unavailable kind: e2e evidence_level: tested --- End-to-end test e2e:operator_clause_drop in test/test_e2e.plt. It drives the installed command line or pack the way a user would.

Context

Given the sample fixture, when the user lists clause_drop mutants, then each of the 4 clauses of multi-clause predicates is replaced by nothing.

Run it alone with `swipl test/run.pl e2e:operator_clause_drop`.