{"id": "c807", "title": "C807 — Transfer the retained-component Key operation to BJ", "filename": "C807.md", "role": "Research action", "step": 807, "sha256": "a8824139c11e121e9bdebc8d187d731e1fc84990697680494fdf25eb9e8fce18", "bytes": 1213, "origins": ["C480–C1634/Research_Cycles/C0732_C0831/journal.json#C807"], "download": "/sources/a8824139c11e121e9bdebc8d187d731e1fc84990697680494fdf25eb9e8fce18.md", "format": "md", "derived": true, "tags": [], "excerpt": "Does the designated460 expansion produce the supplied completion while retaining the earlier path?", "content": "# C807 — Transfer the retained-component Key operation to BJ\n\n## Question\n\nDoes the designated460 expansion produce the supplied completion while retaining the earlier path?\n\n## Inputs\n\n```json\n{\n  \"held_call\": 1906,\n  \"prefix_Creation_to_call\": 1950\n}\n```\n\n## Sources\n\n```json\n[\n  \"File20 §7A.10; C731 retained-component grammar\"\n]\n```\n\n## Opened utc\n\n2026-09-28T02:08:44.369038+00:00\n\n## Results\n\n```json\n{\n  \"native_tail\": 460,\n  \"expanded_tail\": 500,\n  \"generated_endpoint\": 1406,\n  \"retained_prefix_total\": 2450,\n  \"uniform_whole_diagnostic\": \"60250/23\",\n  \"gain\": 40\n}\n```\n\n## Finding\n\nExpanding the final460 to500 adds40 and reaches Conquest1406 with the call fixed. Retaining the1950 prefix gives2450. Uniform expansion of the full2410 is a different path operation.\n\n## Reassessment\n\nJoin the BJ duration to the source NT2450 construction at its declared head roles.\n\n## Checks\n\n```json\n{\n  \"completion\": true,\n  \"total2450\": true,\n  \"gain40\": true,\n  \"different_uniform\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T02:08:44.369344+00:00\n\n## Record provenance\n\nExact record hash: `acfc3dc4fbaad0fbc25f98cb74b7a9b1c248ab5bb46dfff576d16cc0c7d03fd7`\n\nSource journal: `Research_Cycles/C0732_C0831/journal.json`", "journalDownload": "/sources/8ea2b882289fbcea5cf11177923617f0c1d1ad7e6eaa3bffb174c6f89699d97d.json", "evidenceLinks": [{"id": "d-c8822cb5bb81a7ac", "title": "File 20"}]}