Spektrafilm-android

Use when working on the Spectrafilmandroid spektrafilm film-emulation engine, its parity-gated native C++ spectral simulation pipeline (filming/printing/scanning), or its Jetpack Compose Lightroom-style RAW editor — covers engine parity rules, spectral film physics, and Compose editor patterns.

Use when deciding WHAT to build in the Spectrafilmandroid app and HOW to implement it, driven by real user needs — turning spektrafilm community pain points (discuss.pixls.us) into parity-safe implementations. Provides the prime principle (the app bends to the user, not the reverse), the parity gate every solution must pass, a five-tier implementation playbook (UI / pre-engine / post-engine / engine-gated / data), the ranked user-problem catalog with evidence, and pointers to the full solution designs. Triggers: prioritizing features, "what do users want", implementing forum requests, and any color / white-balance / gamut / contrast / saturation / masking / local-adjustment / export / LUT / profiles / B&W / performance / onboarding / crash work — i.e. any "solve the user's problem" product decision for this app.