Pipa Image-Grounded Prototype Packet

Status: L2 V5 build-packet candidate

This packet promotes the Round 8 pipa exploration into a repo-tracked, DXF-first V5 candidate packet for tonykoop/pipa#1, carrying prior tonykoop/instrument-maker#151 context. It is intentionally useful for layout review, visual planning, sourcing, Wolfram source-first fret/scale study, and first measurement work, while refusing to claim that one angled reference photo can determine final CNC geometry.

Fabrication authority starts with cad/v2-dxf-starter.dxf, drawings/pipa-v5-starter.dxf, and any later measured templates or reviewed CAD. The current DXF authority is limited to flat outline review. Generated concept images, prompt text, and photo-derived sketches are support material only; they do not control outline, fret location, bridge placement, pegbox side profile, rear shell depth, or toolpaths.

Open explorer.html for a studio-facing showcase of the packet evidence, DXF/CAD authority boundary, Wolfram source files, print packet, and validation gates. site/index.html redirects to the same explorer until a fuller public build-log site is ready.

File Map

File	Purpose
explorer.html	Generated studio explorer for packet review.
explorer-sections/	Local explorer section overrides for pipa authority and evidence gates.
site/index.html	Minimal cross-link to the root explorer; not a full public site.
design.md	Visible/inferred/unresolved geometry split and prototype intent.
source-media-evidence.csv	Source-media availability and reference-assumption authority table.
fret-scale-evidence.csv	Fret, scale, bridge, string-spacing evidence gates and blocked claims.
cad-dxf-authority-plan.md	CAD/DXF revision plan separating assumptions from fabrication authority.
family-spec.csv	Single-instrument family/spec equivalent for V5 packet inventory.
measurement-intake.csv	Measurement checklist that blocks L3/L4 promotion until complete.
validation-loop.csv	Empirical validation loop scaffold for future build feedback.
cad/v2-dxf-starter.dxf	DXF-first starter layout for review and tracing.
drawings/pipa-v5-starter.dxf	V5 drawings-path copy of the starter DXF for migration review.
cad/pipa.scad	Source-only OpenSCAD scaffold with unresolved dimensions flagged.
cad/mcp-session-log.md	V5 provenance log for packet, CAD, visual, and runtime-tool outputs.
cad-notes.md	CAD handoff notes, layer intent, and unresolved surfaces.
bom.csv	Prototype material and hardware planning list.
sourcing.csv	Search terms and source expectations.
cut-list.csv	Flat-mule-only cut planning rows.
drawing-brief.md	Shop drawing brief and non-claims.
photo-shotlist.md	Reference and shop-photo intake list.
visual-bom-brief.md	Visual BOM plan with authority warnings.
assembly-manual.md	Flat silhouette mule assembly/review workflow.
supplier-rfq.md	Measurement-first vendor and reviewer request.
risks.md	Fabrication and evidence risks.
pipa-starter.wl	Measurement notebook starter.
wolfram/fret-scale-study.wl	Source-only fret/scale study; no runtime claim yet.
validation.csv	Measurement, drawing, and prototype validation gates.
visual-output-register.csv	Fabrication-authority and concept-image separation.
concept-image-prompt-brief.md	Image-gen prompt constraints for non-authoritative visuals.
capstone-deck.md	Markdown review deck stub.
print-packet.md / print-packet.html	Printable review packet.
capstone-manifest.json	Machine-readable packet manifest.

First Build Recommendation

Start with a flat acrylic, MDF, or plywood silhouette mule from the DXF starter, then overlay full-scale prints against the original reference photo and a real pipa or published reference measurements before generating any carved body, rear shell, pegbox side profile, or final fret layout.

B3 Evidence Gate

Use source-media-evidence.csv to decide which reference facts are available, private, missing, or future validation evidence. Use fret-scale-evidence.csv before changing any fret, scale, bridge, or string-spacing geometry. Use cad-dxf-authority-plan.md as the CAD/DXF promotion checklist; it keeps the historical pipa-reference assumptions separate from the repo-tracked L2 DXF and future measured fabrication authority.

Explicit Non-Claims

• Not a CNC-ready pipa body.
• Not a final fret or intonation schedule.
• Not a verified rear-shell carve or bowl-depth model.
• Not a source for pegbox side-profile angle.
• Not a substitute for measured reference-member review.
• Not a Wolfram-runtime-validated model; the .wl files are source-only until an execution log and exported results are committed.