{
  "generated": "2026-05-18",
  "title": "Sheng Mouth-Organ Family Packet",
  "instrument": "sheng",
  "build_target": "sheng mouth-organ family",
  "artifact_focus": "free-reed mouth organ L2 V5 packet with traditional side-branch and compact control variants",
  "packet_version": "L2 V5 build-packet candidate",
  "packet": "docs/build-packets/sheng-mouth-organ-family",
  "issue": "tonykoop/instrument-maker#153; tonykoop/sheng#1",
  "status": "L2 V5 build-packet candidate",
  "release_status": "private-review",
  "v5_standard": "tonykoop/instrument-maker#186",
  "mcp_provenance_contract": "tonykoop/instrument-maker#188",
  "runtime_validation": "wolfram-source-only-not-run",
  "family_members": [
    "free-reed mouth organ",
    "traditional side-branch reed",
    "compact stopped-end control"
  ],
  "release_gate": {
    "public_candidate": false,
    "required_before_public": [
      "Select one architecture branch in architecture-choice.md before layout or CAD authority claims.",
      "Record P0 reed-coupon evidence in p0-reed-coupon-log.csv before final reed pitch, onset pressure, pull-down, or cut-ready socket claims.",
      "Record P1 single-pipe control and windchest/leakage evidence before branch promotion beyond L2.",
      "Add reviewed DXF/CAD/design-table authority for the selected branch before fabrication or public-release geometry claims.",
      "Run and record Wolfram/runtime evidence before treating sheng-starter.wl as more than source-only scaffold."
    ]
  },
  "variants": [
    {
      "branch": "traditional-side-branch",
      "family_spec": "traditional-side-branch/family-spec.csv",
      "acoustic_law": "side_branch_reed",
      "end_condition": "both_ends_open",
      "reed_source_role": "side_branch_free_reed_controls_pipe_coupling",
      "unknown_requires_measurement": "p0_reed_coupon_and_p1_single_pipe_required_before_fabrication"
    },
    {
      "branch": "compact-control",
      "family_spec": "compact-control/family-spec.csv",
      "acoustic_law": "closed_open",
      "end_condition": "one_end_closed_reed",
      "reed_source_role": "free_reed_forms_closed_end_boundary",
      "unknown_requires_measurement": "p0_reed_coupon_and_p1_single_pipe_required_before_fabrication"
    }
  ],
  "round30_free_reed_guard": {
    "explicit_family_spec_fields": [
      "acoustic_law",
      "end_condition",
      "reed_source_role",
      "unknown_requires_measurement"
    ],
    "fabrication_boundary": "No reed dimensions, pull-down data, tuning measurements, or windchest geometry are build-ready until measured P0/P1 evidence and reviewed CAD/DXF/design-table authority exist."
  },
  "fabrication_authority": "future DXF/CAD/design-table/measured-template only",
  "generated_images_authority": "concept_only_or_reference_only",
  "authority_register": "visual-output-register.csv",
  "mcp_session_log": "cad/mcp-session-log.md",
  "p0_coupon_log": "p0-reed-coupon-log.csv",
  "p1_control_log": "p1-single-pipe-control-log.csv",
  "p0_p1_empirical_loop": "free-reed-empirical-loop.md",
  "windchest_geometry_plan": "windchest-geometry-plan.csv",
  "safety_gates": "safety-gates.csv",
  "engineering": {
    "wolfram": [
      {
        "source_file": "sheng-starter.wl",
        "cloud_url": "",
        "cloud_path": "sheng-starter.wl",
        "kind": "source-only-starter",
        "permission": "local"
      }
    ]
  },
  "sources": [
    {
      "title": "Repository README",
      "credit": "Local packet status, file map, and validation commands",
      "url": "README.md"
    },
    {
      "title": "V5 provenance log",
      "credit": "Local artifact authority and source-only runtime boundaries",
      "url": "cad/mcp-session-log.md"
    }
  ]
}