Harden Pebble pet build and animation quality

[Protonmatter]

Summary

• rebuild all nine runtime animation rows from dedicated, state-specific source frames
• add exact mirrored locomotion, a wave-to-neutral loop, distinct waiting/review actions, stable active-work registration, and debris-free artwork
• harden the verifier against disguised formats, malformed metadata, hidden RGB residue, clipping, unused-cell artwork, disconnected components, and oversized payloads
• add semantic rebuild comparison, byte-reproducible archives, collision-safe installation, hashed dependencies, pinned Actions, Dependabot, tagged releases, checksums, and provenance attestations
• add contribution, security, and asset-provenance documentation

Validation

• python -m unittest discover --start-directory tests --verbose — 18 passed
• strict repository verifier — passed
• official Work Pets sprite-sheet preflight — valid, zero errors
• isolated rebuild — 33 generated artifacts semantically identical
• repeated packaging — runtime and source ZIP SHA-256 hashes identical
• Python compile, Bash syntax, and git diff --check — passed

Runtime impact

The pet ID and V1 atlas contract remain unchanged. The committed runtime atlas and previews are regenerated from the new approved source/rows inputs.

[chatgpt-codex-connector]

💡 Codex Review

pebble-codex-pet/pebble-poses/spritesheet.png

Line 1 in 3227993

�PNG

Replace the corrupted runtime spritesheet

The committed PNG is malformed: its IDAT chunk at offset 327773 has an invalid CRC and the file has no IEND chunk, so Pillow cannot decode it. Consequently the changed validation workflow fails at verify_pebble_pose_pet.py, packaging cannot complete, and any installation containing this atlas is unusable; the similarly truncated WebP, combined GIF, and contact-sheet blobs should be regenerated as part of the same fix.

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