Publish Chimera GFX source

docs/phase1/FIRMWARE_ABI_CHECKLIST.md

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+# Firmware and ABI checklist
+
+## Firmware identity
+
+- [ ] Exact user-visible firmware identifier supplied by Jens
+- [ ] Reproducible identification method documented without kernel access
+- [ ] Identifier added to one candidate build only
+- [ ] `FIRMWARE_COMPATIBILITY.md` row created as untested
+- [ ] No compatibility inferred from another revision
+
+## Discovery gate
+
+- [ ] Capability-probe artifact manifest and SHA-256 reviewed
+- [ ] Explicit artifact-specific execution permission recorded
+- [ ] Probe resolves names only and invokes no resolved pointer
+- [ ] Redacted result log archived
+- [ ] Runtime module candidate confirmed or rejected for this firmware
+
+## SDL/VideoOut evidence
+
+- [x] SDL source commit pinned
+- [x] Zlib license and overlay notice recorded
+- [x] Project code uses public SDL2 APIs only
+- [x] Keyboard/IME initialization removed from the staged build
+- [x] Direct GNM imports forbidden
+- [ ] Bounded flip-wait or safe supervisor proven
+- [ ] Cleanup behavior observed on this exact firmware
+
+## Artifact review
+
+- [ ] Clean source commit matches manifest
+- [ ] SDK and SDL commits match locks
+- [ ] Firmware is not `NONE`
+- [ ] ELF filename, size, and SHA-256 match
+- [ ] Imports match the API inventory
+- [ ] Offline host, static-analysis, cross-compile, and secret tests pass
+- [ ] Transfer and execution remain false until separately approved
+
+Any unchecked runtime item blocks execution.