{"abstract":"Unavailable replicas count toward readiness.","category":"Deployment models","checks":8,"contract":"Report blocked on invalid specification, degraded on failed required replicas, progressing when observed generation lags, progressing when updated or available counts are below desired, otherwise ready. Zero desired is ready when observed.","contract_signature":"valid, failed, observed, generation, updated, available, desired","evaluation_group":"xt-rollout-summary","failed_approach":"The attempted repair substitutes if available <= desired:. Fixture 6 still yields 'progressing' instead of 'ready'.","family":"xt-rollout-summary-available-replicas","id":"FA-10151","implementations":{"attempt":{"sha256":"d6556578da504165148fd6a8d8b2c0462f53349c3ec155c3f6977989125fd789","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(valid, failed, observed, generation, updated, available, desired):\n    if not valid: return 'blocked'\n    if failed: return 'degraded'\n    if observed < generation: return 'progressing'\n    if updated < desired: return 'progressing'\n    if available <= desired: return 'progressing'\n    return 'ready'\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve(False, False, 1, 1, 1, 1, 1), 'blocked')\ncheck('fixture 2', solve(True, True, 1, 1, 1, 1, 1), 'degraded')\ncheck('fixture 3', solve(True, False, 0, 1, 1, 1, 1), 'progressing')\ncheck('fixture 4', solve(True, False, 1, 1, 0, 1, 1), 'progressing')\ncheck('fixture 5', solve(True, False, 1, 1, 1, 0, 1), 'progressing')\ncheck('fixture 6', solve(True, False, 1, 1, 1, 1, 1), 'ready')\ncheck('fixture 7', solve(True, False, 1, 1, 0, 0, 0), 'ready')\ncheck('fixture 8', solve(True, False, 2, 1, 2, 2, 1), 'ready')\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"3a1809c486a41fa016e0b4e0184b4609363908e383b115ec0c1108313f64ee48","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(valid, failed, observed, generation, updated, available, desired):\n    if not valid: return 'blocked'\n    if failed: return 'degraded'\n    if observed < generation: return 'progressing'\n    if updated < desired: return 'progressing'\n    if False: return 'progressing'\n    return 'ready'\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve(False, False, 1, 1, 1, 1, 1), 'blocked')\ncheck('fixture 2', solve(True, True, 1, 1, 1, 1, 1), 'degraded')\ncheck('fixture 3', solve(True, False, 0, 1, 1, 1, 1), 'progressing')\ncheck('fixture 4', solve(True, False, 1, 1, 0, 1, 1), 'progressing')\ncheck('fixture 5', solve(True, False, 1, 1, 1, 0, 1), 'progressing')\ncheck('fixture 6', solve(True, False, 1, 1, 1, 1, 1), 'ready')\ncheck('fixture 7', solve(True, False, 1, 1, 0, 0, 0), 'ready')\ncheck('fixture 8', solve(True, False, 2, 1, 2, 2, 1), 'ready')\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":" This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"xt-rollout-summary-available-replicas","generated_at":"2026-09-29T14:38:36.320415+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"An offline model of replica rollout status, suitable for testing build and release tooling without external services.","root_cause":"The implementation substitutes if False: for if available < desired:, so unavailable replicas count toward readiness.","sha256":"5a289b6a8820be76676a8577f1ff8ffb3a3487d2e2ba930041017c18f7fd8d1e","title":"Replica rollout status: Unavailable replicas count toward readiness · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":39.802,"exit_code":1,"observations":[{"actual":"blocked","check":"fixture 1","expected":"blocked","passed":true},{"actual":"degraded","check":"fixture 2","expected":"degraded","passed":true},{"actual":"progressing","check":"fixture 3","expected":"progressing","passed":true},{"actual":"progressing","check":"fixture 4","expected":"progressing","passed":true},{"actual":"progressing","check":"fixture 5","expected":"progressing","passed":true},{"actual":"progressing","check":"fixture 6","expected":"ready","passed":false},{"actual":"progressing","check":"fixture 7","expected":"ready","passed":false},{"actual":"ready","check":"fixture 8","expected":"ready","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": \"blocked\", \"expected\": \"blocked\", \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": \"degraded\", \"expected\": \"degraded\", \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": \"progressing\", \"expected\": \"progressing\", \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": \"progressing\", \"expected\": \"progressing\", \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": \"progressing\", \"expected\": \"progressing\", \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": \"progressing\", \"expected\": \"ready\", \"passed\": false}, {\"check\": \"fixture 7\", \"actual\": \"progressing\", \"expected\": \"ready\", \"passed\": false}, {\"check\": \"fixture 8\", \"actual\": \"ready\", \"expected\": \"ready\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":39.157,"exit_code":1,"observations":[{"actual":"blocked","check":"fixture 1","expected":"blocked","passed":true},{"actual":"degraded","check":"fixture 2","expected":"degraded","passed":true},{"actual":"progressing","check":"fixture 3","expected":"progressing","passed":true},{"actual":"progressing","check":"fixture 4","expected":"progressing","passed":true},{"actual":"ready","check":"fixture 5","expected":"progressing","passed":false},{"actual":"ready","check":"fixture 6","expected":"ready","passed":true},{"actual":"ready","check":"fixture 7","expected":"ready","passed":true},{"actual":"ready","check":"fixture 8","expected":"ready","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": \"blocked\", \"expected\": \"blocked\", \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": \"degraded\", \"expected\": \"degraded\", \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": \"progressing\", \"expected\": \"progressing\", \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": \"progressing\", \"expected\": \"progressing\", \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": \"ready\", \"expected\": \"progressing\", \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": \"ready\", \"expected\": \"ready\", \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": \"ready\", \"expected\": \"ready\", \"passed\": true}, {\"check\": \"fixture 8\", \"actual\": \"ready\", \"expected\": \"ready\", \"passed\": true}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}