# Verified lossless optimization evidence

- App: LocalFlux 1.0.7.0, live Microsoft Store build
- Tested: 2026-08-02
- Fixture root shown in screenshots: `C:\tmp\LocalFlux-lossless-proof-v107\input`
- Inputs: synthetic, rights-cleared, and free of personal or client information
- Screenshots: reviewed to expose only LocalFlux UI, synthetic filenames, and `C:\tmp` paths

## Verified smaller case

- Input: `dashboard-animation-repeated-frames.gif`
- Input size: 658,785 bytes
- Output: `dashboard-animation-repeated-frames_optimized.gif`
- Output size: 54,329 bytes
- Saved: 604,456 bytes (91.8%)
- Frames: 12 before, 12 after
- Dimensions: 1920 × 1080 before and after
- Per-frame delays: 12 values of 10 before and after
- Rendered-frame signature comparison: equal
- Source SHA-256: `202D74DFBBEA150AE514BBE064602F73F150BAB438B39269371013D71F68B0D2`
- Output SHA-256: `BE4170949D86B8E0819A181A25DDD3718BF2AD79E7C1E80F8B9D4D60017B2C02`

## Exact-copy fallback case

- Input: `already-optimized-icon.png`
- Input size: 8,290 bytes
- Output: `already-optimized-icon_optimized.png`
- Output size: 8,290 bytes
- Saved: 0 bytes (0%)
- Source and output SHA-256: `F287BBCE8EB98A9F19416DCE1A74A759F3AC8DDA69ADB338022CB1B8F90BD937`
- Exact byte copy: yes

## Scope notes

The 91.8% GIF reduction is deliberately constructed from 12 repeated full frames to demonstrate the successful smaller-output branch. It is not a forecast for ordinary GIFs. The PNG demonstrates that an already-efficient or unverifiable changed candidate produces a named output containing the exact source bytes.