Add 13 advanced CAD modeling tasks (A5–A6 tier)#176
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A5 — 8 tasks, compound geometry requiring multi-step spatial reasoning: u-bracket, double-d-shaft, ribbed-plate, hex-bolt-blank, disc-hub, hollow-cap, lightened-disc, stepped-boss-plate A6 — 6 tasks, complex machined parts with many features: compound-bore-ring, sprocket-blank, motor-flange, yoke-block, pulley, compound-boss All volumes computed analytically. Checks: valid_solid, bbox, mass_props (1–2% tolerance), hole_count/positions where Z-aligned holes are present, step_roundtrip on all. https://claude.ai/code/session_017FkXxRjwdnXmGp91TVY8pe
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Summary
This PR adds 13 new advanced CAD modeling tasks to the mecheval benchmark suite, spanning tiers A5 and A6. These tasks cover a range of mechanical engineering features including flanged discs, lightened components, stepped bosses, compound assemblies, and specialized parts like pulleys and sprockets.
Tasks Added
Tier A5 (7 tasks):
a5-disc-hub-01: Flanged disc with raised central hub, central bore, and 6-bolt circlea5-lightened-disc-01: Disc with central bore and six lightening holesa5-stepped-boss-plate-01: Rectangular plate with raised central boss and through featuresa5-ribbed-plate-01: Plate with three longitudinal stiffening ribs and corner boltsa5-u-bracket-01: U-channel bracket with mounting holesa5-double-d-shaft-01: Cylindrical shaft with two opposing flats (double-D profile)a5-hex-bolt-blank-01: Hex-head bolt blank (head + shank, no thread)a5-hollow-cap-01: Hollow cylindrical cap with 8mm base wallTier A6 (5 tasks):
a6-compound-boss-01: Rectangular base with two raised cylindrical bosses and dual boresa6-motor-flange-01: Motor mounting flange with register boss and bolt patterna6-sprocket-blank-01: Sprocket blank with disc, raised hub, keyway, and 4-bolt circlea6-pulley-01: Flanged belt pulley with narrow groove section and central borea6-compound-bore-ring-01: Thick ring with stepped counterbore from each enda6-yoke-block-01: Fork yoke with cross-bore through both tinesKey Features
max_solid_count: 1to ensure proper boolean operations and single-solid outputNotable Implementation Details
https://claude.ai/code/session_017FkXxRjwdnXmGp91TVY8pe