{"abstract":"Media specificity outranks wildcard before quality.","category":"Content negotiation","checks":4,"contract":"Bounded offline decision model: media specificity outranks wildcard before quality. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","contract_signature":"exact, wildcard","evaluation_group":"xh-media-specificity-outranks-wildcard-before-quality","failed_approach":"The attempted repair uses `exact or wildcard` and still violates a separate fixture.","family":"xh-media-specificity-outranks-wildcard-before-quality","id":"FA-6831","implementations":{"attempt":{"sha256":"1cca82826238b4e9c76378184535d0a9fc203411231806beb7cc41089ab7ffa0","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport ipaddress\nimport re\nfrom urllib.parse import urlsplit, urljoin\nN = 1\nobservations = []\ndef solve(exact, wildcard):\n    return exact or wildcard\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(0, 1), 0)\", \"check('fixture 2', solve(0.2, 0.9), 0.2)\", \"check('fixture 3', solve(None, 0.7), 0.7)\", \"check('fixture 4', solve(1, 0), 1)\"]\nfor _line in _fixtures[N % len(_fixtures):] + _fixtures[:N % len(_fixtures)]:\n    exec(_line)\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":"b5dc830a6a3b0968d29b879e60fb38101aab612bbcd7504d6e2e0522825e4e8e","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport ipaddress\nimport re\nfrom urllib.parse import urlsplit, urljoin\nN = 1\nobservations = []\ndef solve(exact, wildcard):\n    return max(exact or 0,wildcard)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve(0, 1), 0)\", \"check('fixture 2', solve(0.2, 0.9), 0.2)\", \"check('fixture 3', solve(None, 0.7), 0.7)\", \"check('fixture 4', solve(1, 0), 1)\"]\nfor _line in _fixtures[N % len(_fixtures):] + _fixtures[:N % len(_fixtures)]:\n    exec(_line)\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":"Bounded deterministic policy model over validated inputs; not a complete protocol stack or an interoperability claim. The five variants rotate the same explicit fixture set. 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":"xh-media-specificity-outranks-wildcard-before-quality","generated_at":"2026-09-29T14:38:05.582031+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic content negotiation model isolates the media-specificity-outranks-wildcard-before-quality policy at a network component boundary.","root_cause":"The faulty implementation uses `max(exact or 0,wildcard)` for the media-specificity-outranks-wildcard-before-quality decision.","sha256":"6927fc4f8fe882dc5fdfba240e005c9520ba3d5c9613361896c89d944c803e28","title":"Media specificity outranks wildcard before quality · 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":37.126,"exit_code":1,"observations":[{"actual":0.2,"check":"fixture 2","expected":0.2,"passed":true},{"actual":0.7,"check":"fixture 3","expected":0.7,"passed":true},{"actual":1,"check":"fixture 4","expected":1,"passed":true},{"actual":1,"check":"fixture 1","expected":0,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 0.2, \"expected\": 0.2, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 0.7, \"expected\": 0.7, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 1, \"expected\": 0, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.402,"exit_code":1,"observations":[{"actual":0.9,"check":"fixture 2","expected":0.2,"passed":false},{"actual":0.7,"check":"fixture 3","expected":0.7,"passed":true},{"actual":1,"check":"fixture 4","expected":1,"passed":true},{"actual":1,"check":"fixture 1","expected":0,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 0.9, \"expected\": 0.2, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": 0.7, \"expected\": 0.7, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 1, \"expected\": 0, \"passed\": false}], \"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."}}