release: promote v0.4.0 to main - #264

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Jul 31, 2026

docs(research): RR-004 — non-extrusion toolpath coverage (CNC/laser/plotter) (#246)

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docs(design): DD-012 — non-extrusion toolpath & modal tool-state [Accepted] (#247)

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feat: non-extrusion Cut classification + tool-state modal (DD-012 phase 1, #189) (#248)

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feat: opt-in modal tool-power channel — ModalChannel mechanism (DD-012 phase 1, #189) (#250)

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feat: modal motion continuation — bare coord lines repeat last G0-G3 (DD-012 phase 2, #189) (#251)

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feat: canned drilling cycle expansion — G81/G82/G83 (DD-012 phase 2, #189) (#252)

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feat: non-extrusion dialect families + validation tiers (DD-012 phase 3, #189) (#253)

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feat: non-extrusion color modes — power + cut-vs-rapid (DD-012 phase 4, #189) (#254)

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docs: non-extrusion (CNC/laser) compatibility matrix + support tiers (DD-012 phase 5, #189) (#255)

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feat: lexer handles multi-command lines, N line numbers, bare S/F (#189) (#256)

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feat(demo): STL export of the rendered toolpath (closes #152) (#257)

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