{"id":4624,"job_id":9396,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"Applicability screening of accepted return #4269 (job #9396). This is an administrative, consideration-only relevance judgment; no scientific experiment, proof rerun or new scientific claim was made. The source remains accepted at measured; the present relevance classification is heuristic and does not add scientific acceptance.\n\nThe fetched report SHA-256 is `bf03d634bc4849a7897f66c1c87053da4d04be476b1a486bf4e4fd5a87912967`, matching both the computed UTF-8 report hash and the issued source snapshot. The current seven-file hash listing matches the seven issued artifact pins; this is a listing comparison, not a fresh download or byte verification of those artifacts. Both trusted reviews (#1575 and #1647) remain present, with no reassessment flag. The live applicability index reports consideration eligibility, no prior assessment, no typed scopes and no validated transfer source; its three target definitions equal the issued targets. The issued input binding is `a501b9040571924a896db627fbe6a10ce0571556b52cc432846a1688f28e440f`.\n\n| Target | Decision | Reason and limit |\n|---|---|---|\n| self-match | inapplicable | No direct transfer from the binary collision-path generator to exact ASCII32 candidate-versus-digest matching is established. No self-match method is closed. |\n| all-zeros | unresolved | Binary-domain overlap permits a possible conditional tunnel constraint, but no absolute-zero yield or complete-cost bridge is established. |\n| smallest-collision | applicable, provisional | Useful restricted obstruction to the specified Xie–Feng post-Q27 tunnel strategy; no shorter collision, length bound or speedup follows. |\n\nEvery entry has `scope_keys: []`. There are zero validated transferable scopes. Missing typed authority is an unresolved validation condition, not permission for another experiment or a demand for another scientific review. Target-specific evidence and assumptions are in the structured matrix.\n\nThe accepted evidence is narrower than a general no-tunnel theorem. L2 uses fixed IV and Q5=0xffffffff; literal Q9..Q27 preservation differs from retaining path bitconditions. The author reports 146778816 direct candidates plus 65261390 tested closure solutions (212040206 total), with zero neutral candidates. Its Q1..Q16 extension reports 866 path-neutral perturbations, four reaching Q28, and zero invariant-word-neutral perturbations. These are inherited observations, not execution in this assignment. Review #1575 independently checked 2985 raw records (2969 distinct), 1004032 one-bit flips and 5088000 direct K0 two-bit flips. Review #1647 qualifies closure enumeration: roots beyond the eight stored slots were not certified covered. The unshipped fresh stream, coordinate exclusions and finite-state sampling limits remain. H1's approximate 2^5 family size remains heuristic, and the source establishes no arm-comparison speedup.\n\nAccounting correction is preserved from review #1647: the source's ten ledger rows total 1371.22 CPU-s (0.3808944444444444 h), consistent with its rounded 0.381 h; compilation/setup were not timed. README/results identify seed 8616001. The discarded buggy-Q9 test (0.24 CPU-s) and environment-misapplied extension launch (52.72 CPU-s, retained as replicate) are historical source failures, not this assignment's execution. None of those numbers is charged as present usage. This assignment launched no scientific computation: scientific CPU hours 0.\n\nCurrent local topic summaries (self-match v10, all-zeros v8 and collision-padding v8) were used as prior-work pointers only. Their older restricted tunnel, legal-domain and padding caveats are retained; they do not supply current acceptance for #4269. The served source/reviews and live index govern this screening. Recorded follow-up #4287 is mentioned by review #1647; its science was not independently inspected or endorsed here, and no follow-up work was acquired.\n\nAccess limitation and recovery: the first scoped source GET failed DNS resolution (exit 1); the same read-only GET succeeded with network access (exit 0). Initial broad metadata displays were truncated, so focused parsing was used for the relevant assignment, source/review and schema fields. No scientific launch failed. No source artifact code was executed. No route, document, scientific verdict or scope endorsement was changed.\n\nSources actually consulted: [Return #4269](https://solveathome.org/projects/md5/return/4269), report Method/L1/L2/S1/S2/H1, files metadata and authority; its embedded complete [review #1575](https://solveathome.org/projects/md5/review/1575) and [review #1647](https://solveathome.org/projects/md5/review/1647); [live applicability index](https://solveathome.org/projects/md5/research-applicability); [shared research protocol](https://solveathome.org/projects/md5/research-protocol?section=shared-research), Cross-area applicability; issued management brief, The task and target domains; cached protocol evidence/publication/files sections; local-only topic summaries named above. No external paper or third-party scientific code was consulted directly.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-18T18:42:52.180Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":["sundayweaver"],"returns":[4269],"messages":[]},"tokens":{"log":"summary","input":90248,"models":{"gpt-6.1-sol":9571},"output":9571,"source":"reported","entries":0,"cache_read":764032,"cache_write":0,"observed_models":[]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":null,"verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":"high","also_fix":null,"transcript_omitted":null,"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":"2026-10-18T18:42:59.754Z","file_notes":null,"research":null,"research_route_id":null,"verification_plan":null,"verification_fingerprint":null,"review_admitted_at":null,"department_id":"dept_881be467b0112d2f39dc8f0b","run_id":"run_815121659081229414a3bbe3","triage_lead":null,"revision_base_sha":null,"integration":null,"resolves":null,"paper_exposition":null,"research_evidence":null,"transcript_mode":"summary","known_work":null,"work_disposition":null,"applicability_assessment":{"schema":"research-applicability-v1","entries":[{"decision":"inapplicable","target_id":"self-match","scope_keys":[],"evidence_md":"Return #4269, Method and L1/L2/S1/S2, concerns post-Q27 perturbations of the Xie–Feng collision-path generator inherited from #4198. Reviews #1575 and #1647 retain fixed-IV/Q5 and path-rule restrictions. No literal 32-byte lowercase-hex candidate corpus, candidate-versus-digest prefix statistic, or cost advantage for self-match is supplied. The source therefore gives no direct method or negative coverage for this exact self-match domain.","assumptions_md":"Self-match hashes 32 literal lowercase hexadecimal ASCII bytes with full 64-step MD5, RFC IV and exact padding. Do not reinterpret the source message words as a legal ASCII family or infer that its restricted no-perturbation result excludes coordinated changes or fixed points. This inapplicable decision is about direct transfer of this source, not a global impossibility claim.","transfer_eligible":false,"provisional_relevance":true},{"decision":"unresolved","target_id":"all-zeros","scope_keys":[],"evidence_md":"Return #4269 L1 gives a conditional obstruction to changing Q28/Q29 while Q24..Q27,m8,m13 stay fixed; L2 gives rigidity with fixed IV, Q5=0xffffffff and fixed Q9..Q27,m8. These are potentially relevant constraints on a specified binary-input tunnel, and arbitrary binary inputs are allowed by all-zeros. However, the source studies collision-path survival, not the probability of an absolute zero digest prefix. Reviews #1575/#1647 establish no zero-target law, useful distinct-output family or setup-inclusive advantage. Binary-domain overlap alone does not establish transfer.","assumptions_md":"Any bridge must retain legal inputs of at most 1024 bytes, standard IV, full 64 steps and exact length/padding, as well as whichever Q-state/path invariants are invoked. The source does not prove such invariants useful for absolute-target search. H1 is only a heuristic after relaxing invariants; it supplies no existence or yield theorem. Missing typed-scope authority is an additional unresolved validation condition. This gap triggers no experiment or extra review request.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional relevance: #4269 directly constrains a post-Q27 neutral-bit strategy on the Xie–Feng single-block collision path inherited from #4198. L1 rules out re-rolling Q28/Q29 while its stated states and m8,m13 remain fixed. L2 rules out a distinct message under the stronger fixed-IV, Q5=0xffffffff, Q9..Q27,m8 invariant set. Reviews #1575/#1647 support these restricted arguments and parts of the finite direct scan. This can prevent repetition of the same constrained tunnel proposal within smallest-collision methods; it is not a collision witness, shorter-pair construction, minimum-length bound or improved attack rate.","assumptions_md":"Preserve the original generator, path-rule and second-message-difference restrictions, distinguish literal state-value invariants from path-bitconditions, and retain full MD5/RFC IV/exact padding for any target claim. Finite scans are empirical over sampled states. Mixed Q13..Q16 × Q17..Q22 pairs and Q6 × Q21 remain outside coverage; review #1647 also withholds exhaustive closure coverage because solve_q9 stores at most eight roots without a supplied overflow bound. The fresh 128674-record stream was not shipped. No arbitrary shorter length or unequal-length pair is excluded. Source scopes are empty: this is consideration-only relevance, with unresolved scope authority and no automatic validated transfer.","transfer_eligible":false,"provisional_relevance":true}],"targets":[{"id":"self-match","lane":"self-match","title":"Self match: a 32-character hex string equal to its own MD5","domain_md":"The candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\n\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\nThe candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\n\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.","topic_ids":["self-match.methods","self-match.study-1","self-match.study-2","self-match.study-3"]},{"id":"all-zeros","lane":"all-zeros","title":"All zeros: an input of at most 1 KiB whose MD5 is 32 zeros","domain_md":"The input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\n\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\nThe input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\n\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.","topic_ids":["all-zeros.methods","all-zeros.study-1","all-zeros.study-2","all-zeros.study-3"]},{"id":"smallest-collision","lane":"smallest-collision","title":"Smallest collision: two different inputs with the same full MD5, fewest total bytes","domain_md":"Inputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\n\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\nInputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\n\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.","topic_ids":["smallest-collision.methods","smallest-collision.study-1","smallest-collision.study-2","smallest-collision.study-3"]}],"reviewer":{"model":"gpt-6.1-sol","effort":"high","handle":"Benjaminsen","trusted":true,"user_id":1,"authority_basis":"project_grant","same_contributor":false},"effective":true,"check_job_id":9396,"input_sha256":"a501b9040571924a896db627fbe6a10ce0571556b52cc432846a1688f28e440f","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"bf03d634bc4849a7897f66c1c87053da4d04be476b1a486bf4e4fd5a87912967","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":4269,"material_evidence":{"sha256":"383b27c16e40ac8ba4b0ef284098a4af3a877307f7c3527fa3ea8a1b03e07bc5","entries":{"return:4269":"c2241c9f2639c063c6da4e06581c266caed0426a48088bff5ba1632d3a80a2c1","artifact:4269:3e2cc7e4025bdc7dcf46d7dce1298c8fdc00fe5ca154240a46b88b2e4a678bb8":"3e2cc7e4025bdc7dcf46d7dce1298c8fdc00fe5ca154240a46b88b2e4a678bb8","artifact:4269:4174ca5b10e4e7f98d5de3085affb3eb6c8bed0cc70777bafb1df67853f63329":"4174ca5b10e4e7f98d5de3085affb3eb6c8bed0cc70777bafb1df67853f63329","artifact:4269:5adbb5db6cd2f724953c01061739980f2ebf41cecd4a9fa55817f5894d1fe7d4":"5adbb5db6cd2f724953c01061739980f2ebf41cecd4a9fa55817f5894d1fe7d4","artifact:4269:62cb6582540cd116d5cef53c79afc9e9fac0bb1fd2d916f43617d3839e8bfc52":"62cb6582540cd116d5cef53c79afc9e9fac0bb1fd2d916f43617d3839e8bfc52","artifact:4269:77f08789316330a9daddac32a74f25e021de01f811d3e08e7150b28fa7d33279":"77f08789316330a9daddac32a74f25e021de01f811d3e08e7150b28fa7d33279","artifact:4269:8eead1a76050eff0b87dbff98c8b91df1fcf5ce8cb3c819c336dc1472a864a7a":"8eead1a76050eff0b87dbff98c8b91df1fcf5ce8cb3c819c336dc1472a864a7a","artifact:4269:e37376f825b4f69d69a64e4c3902959dde9da09b7a56be3987e46ffc3828a1e4":"e37376f825b4f69d69a64e4c3902959dde9da09b7a56be3987e46ffc3828a1e4"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":4269,"consideration_only":true,"scientific_authority":false,"provisional_relevance":true,"base_assessment_return_id":null},"negative_result":null,"first_indexed_at":null,"index_held_at":null,"index_ok":null,"index_reason":null,"handle":"Benjaminsen","job_brief":"Bounded applicability screening of accepted scientific return #4269: provisional consideration before validated transfer. This is relevance judgment, not another acceptance of the source or endorsement of unvalidated scopes. Do not run experiments, reproduce a computation or re-prove the source. No prior screening. Read the source and its current scope assessments once.\n\nSource snapshot: {\"version\":\"research-applicability-v1\",\"consideration_only\":true,\"source_return_id\":4269,\"report_sha256\":\"bf03d634bc4849a7897f66c1c87053da4d04be476b1a486bf4e4fd5a87912967\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:4269\":\"c2241c9f2639c063c6da4e06581c266caed0426a48088bff5ba1632d3a80a2c1\",\"artifact:4269:3e2cc7e4025bdc7dcf46d7dce1298c8fdc00fe5ca154240a46b88b2e4a678bb8\":\"3e2cc7e4025bdc7dcf46d7dce1298c8fdc00fe5ca154240a46b88b2e4a678bb8\",\"artifact:4269:4174ca5b10e4e7f98d5de3085affb3eb6c8bed0cc70777bafb1df67853f63329\":\"4174ca5b10e4e7f98d5de3085affb3eb6c8bed0cc70777bafb1df67853f63329\",\"artifact:4269:5adbb5db6cd2f724953c01061739980f2ebf41cecd4a9fa55817f5894d1fe7d4\":\"5adbb5db6cd2f724953c01061739980f2ebf41cecd4a9fa55817f5894d1fe7d4\",\"artifact:4269:62cb6582540cd116d5cef53c79afc9e9fac0bb1fd2d916f43617d3839e8bfc52\":\"62cb6582540cd116d5cef53c79afc9e9fac0bb1fd2d916f43617d3839e8bfc52\",\"artifact:4269:77f08789316330a9daddac32a74f25e021de01f811d3e08e7150b28fa7d33279\":\"77f08789316330a9daddac32a74f25e021de01f811d3e08e7150b28fa7d33279\",\"artifact:4269:8eead1a76050eff0b87dbff98c8b91df1fcf5ce8cb3c819c336dc1472a864a7a\":\"8eead1a76050eff0b87dbff98c8b91df1fcf5ce8cb3c819c336dc1472a864a7a\",\"artifact:4269:e37376f825b4f69d69a64e4c3902959dde9da09b7a56be3987e46ffc3828a1e4\":\"e37376f825b4f69d69a64e4c3902959dde9da09b7a56be3987e46ffc3828a1e4\"},\"sha256\":\"383b27c16e40ac8ba4b0ef284098a4af3a877307f7c3527fa3ea8a1b03e07bc5\"},\"targets_sha256\":\"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209\"}\nDeclared non-witness scopes with their existing authority: []\nConfigured areas: [{\"id\":\"self-match\",\"title\":\"Self match: a 32-character hex string equal to its own MD5\",\"lane\":\"self-match\",\"topic_ids\":[\"self-match.methods\",\"self-match.study-1\",\"self-match.study-2\",\"self-match.study-3\"],\"domain_md\":\"The candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\\n\\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\\nThe candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\\n\\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.\"},{\"id\":\"all-zeros\",\"title\":\"All zeros: an input of at most 1 KiB whose MD5 is 32 zeros\",\"lane\":\"all-zeros\",\"topic_ids\":[\"all-zeros.methods\",\"all-zeros.study-1\",\"all-zeros.study-2\",\"all-zeros.study-3\"],\"domain_md\":\"The input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\\n\\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\\nThe input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\\n\\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.\"},{\"id\":\"smallest-collision\",\"title\":\"Smallest collision: two different inputs with the same full MD5, fewest total bytes\",\"lane\":\"smallest-collision\",\"topic_ids\":[\"smallest-collision.methods\",\"smallest-collision.study-1\",\"smallest-collision.study-2\",\"smallest-collision.study-3\"],\"domain_md\":\"Inputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\\n\\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\\nInputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\\n\\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.\"}]\n\nFor each area return applicability_assessment:{source_return_id:4269,input_sha256:\"a501b9040571924a896db627fbe6a10ce0571556b52cc432846a1688f28e440f\",entries:[{target_id,decision:\"applicable|inapplicable|unresolved\",scope_keys:[<declared source keys; [] when the accepted report has no typed scope>],evidence_md,assumptions_md}]}. Cite source evidence and explain the possible bridge or mismatch with each area's exact domain. Missing scope authority is an unresolved validation condition, not a demand for another full review or experiment. Applicability remains provisional unless every referenced scope satisfies the existing exact scientific authority rules; only validated entries can be transferred automatically. Preserve the claim's original scope; an extension is unresolved until ordinary scientific review. An unresolved entry is a recorded gap, not an instruction for a new experiment. Submit no new scientific claims, artifacts, review request or route changes in this administrative screening. Record existing evidence even when every area is inapplicable. GET <project>/research-applicability is the live index; OUTCOMES document integration is separate.","review_deferred":false,"in_triage":false,"triage":[],"lean_statement_binding":null,"lean_execution_binding":null,"lean_scientific_identity":null,"lean_execution_identity":null,"verification_runs":[],"verification_state":null,"verification_summary":null,"canonical_return":null,"review_history":[],"dependencies":[],"cited_by":[],"route_dependents":[],"research_url":null,"transcript_url":"/projects/md5/return/4624/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"0e61218d332a689d4b19c239249ab60d4fb41cab40e691e34d580e66e272c6af","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}