{"id": "c771", "title": "C771 — Forty-step synthesis checkpoint", "filename": "C771.md", "role": "Research action", "step": 771, "sha256": "341d8f5a31b76a88f4327bcb1bfb8b0f2a9f2566cb1f13c4cfa14fdcb4ad1b55", "bytes": 986, "origins": ["C480–C1634/Research_Cycles/C0732_C0831/journal.json#C771"], "download": "/sources/341d8f5a31b76a88f4327bcb1bfb8b0f2a9f2566cb1f13c4cfa14fdcb4ad1b55.md", "format": "md", "derived": true, "tags": ["Rounded"], "excerpt": "Which common mechanism now explains the Rounded family?", "content": "# C771 — Forty-step synthesis checkpoint\n\n## Question\n\nWhich common mechanism now explains the Rounded family?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"C732–770\"\n]\n```\n\n## Opened utc\n\n2026-09-28T01:59:04.586015+00:00\n\n## Results\n\n```json\n{\n  \"checkpoint\": {\n    \"path\": \"deliverables/490d_Chronological_Families_Checkpoint_C771.md\",\n    \"sha256\": \"4c032c5d12943f45cc600e2db12f4d16ad34f83fea9776731e994d301a974820\",\n    \"bytes\": 1493\n  }\n}\n```\n\n## Finding\n\nThe general object is an ordered source path with mode-specific row measurements and a recoverable rounding field. Finite variants are the next discriminating test.\n\n## Reassessment\n\nReconstruct the finite variant masks against literal source examples.\n\n## Checks\n\n```json\n{\n  \"forty\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T01:59:04.586382+00:00\n\n## Record provenance\n\nExact record hash: `e3f27dc311662c3f87b33e3b8aea36e2840b1fcb531973d8916b821f493d4a0e`\n\nSource journal: `Research_Cycles/C0732_C0831/journal.json`", "journalDownload": "/sources/8ea2b882289fbcea5cf11177923617f0c1d1ad7e6eaa3bffb174c6f89699d97d.json", "evidenceLinks": [{"id": "d-4c032c5d12943f45", "title": "deliverables/490d_Chronological_Families_Checkpoint_C771.md"}]}