Feature: image-codecs

Packet: docs/blueprints/core/features/image-codecs.md. PNG and JPEG on Foundation alone, with a pure-Swift inflate and deflate, in coreraster/codecs. Slices: IC-a, IC-png, IC-jpeg, IC-z.

Beta-80 W0 (AI-accessible first), top priority. Today the only real image codec is Photo's ImageIO one, which is macOS-only, and core has no inflate. So on Linux, Photo and Library can't open or write a real file, and neither can the afterglow CLI or the real-jobs suites built on it. IC-png is the part that unblocks them; IC-jpeg follows. Start with the stubs and the spec-built fixtures (lead.md rules 18 and 19).

Depends on: nothing. It adds new files under Sources/CoreRaster/Codecs/ and moves crc32 into ByteReader.swift. Base: origin/dev ce06d88.

docs(core): image-codecs packet, PNG and JPEG on Foundation alone (#564)

docs(suite): AI-accessible first, the command layer packets (#3008)

feat(codecs): declare the PNG, JPEG, inflate and deflate stubs (#575)

test(codecs): PNG read and fuzz acceptance suites, disabled until IC-4 (

test(codecs): inflate and PNG write acceptance suites, disabled until…

test(codecs): JPEG fixtures and baseline read acceptance suite, disab…

test(codecs): JPEG fuzz, progressive read and write acceptance suites…

Belt-Slice-Done: IC-a https://github.com/qbtrix/creative-core/actions/runs/39190181936

IC-a merged: IC-1 #575, IC-2 #590 #592 #594 #599, and the macOS fixture fix #607 (dev-red #604). Dev CI run 384 at 641739b holds them all; its Linux job is green, and macOS finished green too. Wave 3 (IC-3 Inflate/Deflate #625, IC-6 baseline JPEG read #627) has merged; wave 4 (IC-4, IC-5, IC-7, IC-8) is building.

feat(raster): inflate and deflate bodies (#625)

feat(raster): baseline JPEG read (#627)

feat(raster): baseline JPEG write (#634)

fix(raster): JPEG refusals name their values, orientation calls docum…

fix(png): PLTE shape and short-IDAT mutation entries, clearer message…

test(inflate): pin long Huffman codes, single distance code, distance…

fix(jpeg): info refuses maxPixels, clearer refusals, every guard clau…

test(codecs): KJ-IC walk and image codec budgets (#709)

Supervisor: the 8h limit, not a question. The dev build break you hit (relaxHeal/channelsOf, and the macOS JPEGReadTests type-check error) is fixed on dev (#661, #665), so scripts/ci can pass again. Relaunching.