docs: start hex meshing from the provenance graph (#402)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

docs/mcp.md

@@ -184,6 +184,19 @@ edges of partition cells matching counts.
 4. `mesh.seed.list` lists the seeds and the edges they reach (`stale` when the design has no such
    edge); `mesh.seed.clear {edges?}` removes them. Seeds are saved with the model.
 
+## Meshing from the feature graph
+
+A design opened from `.solidcraft` is rebuilt from its timeline, so how each body was made is
+known. `execute` `geometry.features {"body"?}` lists, per body, the features that built it in
+order: type, operation, evaluated values, placement and direction, the sketch profiles (lines,
+arcs, circles), pattern and mirror transforms, targets and tools, and the persistent faces and
+edges each one made. `mesh.plan {"body"}` turns that into a saved, editable hex-meshing plan
+(templates per feature, O-grid and butterfly rings round circles, the partition cuts their frames
+and imprints need, the copies a pattern or mirror made, and the features not mapped yet with why);
+`mesh.plan.apply {"plan"}` cuts and meshes the body (and its copies) with the structured meshers
+and reports `all_hex`, `conforming`, the smallest scaled Jacobian and what still needs the
+projection mesher (`pending`).
+
 ## Relaxing a few bad elements
 
 When `mesh.quality` shows a handful of spikes in an otherwise good mesh:

skills/fieldcraft-meshing/SKILL.md

@@ -9,6 +9,28 @@ You mesh like an experienced analyst: you look first, plan the blocks, and only
 A mesh is judged by its worst elements, not its count. A fast mesh with fans, slivers or collapsed
 corners is a failed mesh, even when every element is "valid".
 
+## 0. Start from the provenance graph (SolidCraft designs)
+
+A `.solidcraft` design is rebuilt from its feature timeline, so how every body was made is known,
+not guessed. Read it before you plan anything:
+1. `geometry.features {"body": "<body>"}`: the features that built the body, in order, with their
+   evaluated parameters (sketch profiles with circles and arcs, extrude direction and extent,
+   primitive placement, hole axis and diameter, shell thickness, pattern/mirror transforms,
+   join/cut targets and tools) and the persistent faces and edges each one made.
+2. `mesh.plan {"body": "<body>"}`: the block plan the features give — the sweep direction, a
+   template per feature (`sweep`, `block`, `butterfly`, `o_grid`, `layers`, `imprint`, `copy`,
+   `partition`), the `rings` round circles, the partition `cuts` that frame them, the element size
+   (layers through the thinnest wall) and the `copies` of a pattern or mirror. Read the
+   `unmapped` list: fillets, chamfers, revolves, sweeps and lofts have no template yet, and a
+   feature not prismatic along the sweep needs projection blocking (#399).
+3. Edit the plan if a cut or the size is wrong (apply the edited object), then
+   `mesh.plan.apply {"plan": "Plan-<body>"}`. Check `all_hex`, `conforming`,
+   `min_scaled_jacobian` and `pending` (the rings today's meshers only box with frame cuts).
+4. Then verify as in §4. When the plan does not fit (unmapped primary features, a failed cell),
+   fall back to the manual process below, keeping the plan's cuts that work.
+
+Shapes without a timeline (STEP, 3MF) start at §1.
+
 ## 1. Look before you mesh (always)
 
 Before the first mesh command: