{"abstract":"Accept encoding explicit entry overrides star.","category":"Content negotiation","checks":4,"contract":"Bounded offline decision model: accept encoding explicit entry overrides star. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.","contract_signature":"name, qualities","evaluation_group":"xh-accept-encoding-explicit-entry-overrides-star","failed_approach":"The attempted repair uses `qualities.get(name) or qualities.get(\"*\",0)` and still violates a separate fixture.","family":"xh-accept-encoding-explicit-entry-overrides-star","id":"FA-6856","implementations":{"attempt":{"sha256":"24faf8516685f054d948766d832679a36bb8171c4ba845b13339c3428957987d","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(name, qualities):\n    return qualities.get(name) or qualities.get(\"*\",0)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve('gzip', {'gzip': 0, '*': 1}), 0)\", \"check('fixture 2', solve('br', {'*': 0.5}), 0.5)\", \"check('fixture 3', solve('gzip', {'gzip': 0.2, '*': 0.8}), 0.2)\", \"check('fixture 4', solve('br', {}), 0)\"]\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":"b7e0674aa08445748c06d4701c21cbef84ef7e07190b0c5ba8ed6addd84be257","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(name, qualities):\n    return max(qualities.get(name,0),qualities.get(\"*\",0))\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\n_fixtures = [\"check('fixture 1', solve('gzip', {'gzip': 0, '*': 1}), 0)\", \"check('fixture 2', solve('br', {'*': 0.5}), 0.5)\", \"check('fixture 3', solve('gzip', {'gzip': 0.2, '*': 0.8}), 0.2)\", \"check('fixture 4', solve('br', {}), 0)\"]\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-accept-encoding-explicit-entry-overrides-star","generated_at":"2026-09-29T14:38:05.783324+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"This deterministic content negotiation model isolates the accept-encoding-explicit-entry-overrides-star policy at a network component boundary.","root_cause":"The faulty implementation uses `max(qualities.get(name,0),qualities.get(\"*\",0))` for the accept-encoding-explicit-entry-overrides-star decision.","sha256":"c9fc6212b93056641fa323320e9c28a1afaa777838ebf59b4e674f20654229de","title":"Accept encoding explicit entry overrides star · 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":42.104,"exit_code":1,"observations":[{"actual":0.5,"check":"fixture 2","expected":0.5,"passed":true},{"actual":0.2,"check":"fixture 3","expected":0.2,"passed":true},{"actual":0,"check":"fixture 4","expected":0,"passed":true},{"actual":1,"check":"fixture 1","expected":0,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 0.5, \"expected\": 0.5, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 0.2, \"expected\": 0.2, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"fixture 1\", \"actual\": 1, \"expected\": 0, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":43.455,"exit_code":1,"observations":[{"actual":0.5,"check":"fixture 2","expected":0.5,"passed":true},{"actual":0.8,"check":"fixture 3","expected":0.2,"passed":false},{"actual":0,"check":"fixture 4","expected":0,"passed":true},{"actual":1,"check":"fixture 1","expected":0,"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 2\", \"actual\": 0.5, \"expected\": 0.5, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": 0.8, \"expected\": 0.2, \"passed\": false}, {\"check\": \"fixture 4\", \"actual\": 0, \"expected\": 0, \"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."}}