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+# Layer 3 plan (rendering primitives + fonts)  -> workflow 2
+
+Stage A (parallel, independent - depend only on the frozen spine):
+  raster        raster.odin        span-callback scanline AA rasteriser, both fill rules
+  stroke        stroke.odin        stroke -> Flat_Path, caps/joins/miter/dashes, hairlines
+  blend         blend.odin         Blend_Mode math, premultiplied compositing, group/mask compose
+  colorfn       colorspace.odin + function.odin   (coupled: Separation needs a tint transform)
+  cff           font_cff.odin      CFF/Type2 charstrings, CIDFont CFF, seac, hint-skip
+  truetype      font_truetype.odin glyf/loca/cmap/hmtx/post/composite glyphs
+  type1         font_type1.odin    PFB/PFA, eexec, Type1 charstrings, seac, flex/hint replacement
+  stdfonts      font_standard.odin standard-14 metrics + Standard/WinAnsi/MacRoman/MacExpert/Symbol/ZapfD
+  cmaps         cmap.odin          embedded CMaps, /ToUnicode, predefined CMap identity + common ones
+
+Stage B (needs A):
+  image         image.odin         image XObjects -> RGBA8, /Decode, /ImageMask, /SMask, /Mask, colour key
+  shading       shading.odin       types 1-7 (function, axial, radial, free/lattice triangle mesh, coons, tensor)
+  font          font.odin          the PDF font dictionary -> Font, widths, encodings, CID mapping, Type3
+
+Stage C: integrate + adversarial review + fix
+
+# Layer 4 plan (interpreter + devices + public API) -> workflow 3
+  pattern.odin, device_raster.odin, device_text.odin, device_list.odin,
+  content.odin, page.odin, annot.odin, outline.odin,
+  examples/pdfinfo, examples/pdfrender, examples/pdftext, README.md