Create first optimized workflow masters

optimized/notes/ltx.md

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+# LTX Notes
+
+## Current default assumptions
+
+- Low-VRAM practicality matters more than graph sophistication.
+- The first question is whether `LTX 2.3` is usable at all on Chris's `3070`.
+
+## Strong current source workflows
+
+- `models/ltx/ltx23-i2v-t2v-simple-single-pass/`
+- `models/ltx/ltx23-t2v-simple-single-pass/`
+- `models/ltx/ltx23-first-last-frame/`
+- `models/ltx/ltx23-character-sheet-best-face-id/`
+
+## Strong current heuristics
+
+- Start with simple single-pass before trying larger consistency graphs.
+- Prefer split-model and extracted-model routes when the source pack says they are easier locally.
+- Treat first-last-frame and character-sheet workflows as second-wave tests, not the baseline.
+
+## Current weak areas
+
+- No real proof yet for what is genuinely practical on Chris's box.
+- Community packs bundle lots of helper nodes, which raises import fragility.
+
+## Best current optimization direction
+
+- Keep `optimized/image-to-video/ltx23-3070-simple-master/` as the first `LTX` default.
+- Only promote first-last-frame or character-sheet variants after the simple master proves viable.
+
+## What needs Monday proof
+
+- whether the simple master loads and runs at all on the `3070`
+- whether preview/decode or the core model path is the real bottleneck
+- whether `LTX` has any realistic chance of displacing `MiniMax` for local use