Roadmap (Fairly Certain)

High Priority (Current Sprint)

Ground Truth Examples: Complete valid + corrupted samples for ALL claimed formats
- ~100 formats now have ground truth examples
- Each format needs: 1 valid sample + 5 corrupted variants
- Run scripts/corruption_test.sh to verify coverage
- See ground_truth_examples/ for current state
~~Investigate Remaining Hang Issues~~: RESOLVED
- Added regression test: "PNG with .ico extension should not hang"
- Fixed via dedicated output thread (2026-01-27)

Cloud Upload Parity Survival Test: Embed custom data (COM marker + APP15 marker) in a JPEG, import into Photos.app, let it sync to Apple/Google/Amazon Photos, re-download from each service's web interface, and compare to see which custom markers survive the round-trip. Tests feasibility of embedded parity data in files managed by cloud photo services.
Embedded Parity Data: Investigate embedding Reed-Solomon parity data directly inside container formats (ISOBMFF uuid boxes, EBML Void elements, PNG ancillary chunks, etc.) so error-correction data travels with the file. See Entropy Shield project for the sidecar PAR2 approach.
C2PA / Content Credentials: Explore JUMBF-based C2PA manifest support for provenance/authenticity verification.

Expand validation coverage for additional formats (document + prioritize by prevalence).
Strengthen full/deep validation paths for existing formats (decode fidelity and error reporting).
Add deterministic regression tests for key formats (corpus-driven).
Provide stable, well-documented CLI/FFI usage examples.
Add CI for multi-platform builds and tests.