Add GPLv2 license and design spec

Design for fanfictioner: story.md -> Gemma plan.md -> sd-cli page images
with per-stage review, character refs applied via Qwen-Image edit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2 files changed, 536 insertions, 0 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..9efa6fb
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,338 @@
+                    GNU GENERAL PUBLIC LICENSE
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diff --git a/docs/superpowers/specs/2026-10-04-fanfictioner-design.md b/docs/superpowers/specs/2026-10-04-fanfictioner-design.md
new file mode 100644
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+# fanfictioner design
+
+Date: 2026-10-04
+
+## Goal
+
+Turn a free-prose story idea (`story.md`) into an illustrated, text-free book of
+page images, read with `../book-reader`. A local Gemma model plans the pages and
+writes the image prompts; `sd-cli` (stable-diffusion.cpp) draws them. The user
+reviews and picks among candidates at every image stage.
+
+## Constraints
+
+- Single Python 3 file, stdlib only. External tools: `sd-cli`, `magick`,
+  `kitty +kitten icat`, `$EDITOR`.
+- GPU: Intel Arc B580, 12 GB VRAM (Vulkan0). Vulkan1 is the Radeon iGPU and must
+  never be used. RAM: 30 GB, shared with the desktop.
+- llama-server runs in router mode on `localhost:8181`, model
+  `Gemma4-12B-qat-mtp`, `--models-max 1`. Unload with
+  `POST /models/unload {"model": ...}`; it reloads on the next request.
+- No text in images: no speech bubbles, captions or labels.
+
+## Pipeline
+
+```
+story.md ──Gemma draft──▶ plan.md ◀─┐ [c]onfirm / [e]dit in $EDITOR / [g]emma revise / [q]uit
+                                    │
+           confirm ──Gemma compile (json_schema)──▶ plan.json
+                                    │
+                         unload Gemma
+                                    │
+  refs:   per character: sd-cli -b 3 turnaround sheet (Z-Image) → pick → refs/<name>.png
+  pages:  per page:
+          base: sd-cli -b 3 (Z-Image, or Krea2 on demand) → pick
+          edit: sd-cli -b 3 (Qwen-Image 2.1 viggle-turbo v0.3, -r scene -r refs…) → pick
+          → $LIBRARY/<Series>/<Book>/NNN.png
+```
+
+## Files
+
+Work dir: a directory named after the story file, next to it
+(`stories/rooftop.md` → `stories/rooftop/`):
+
+- `plan.md`, user-facing plan (source of truth until confirmed)
+- `plan.json`, compiled from `plan.md` on confirm; recompiled when `plan.md`
+  is newer than `plan.json`
+- `refs/<Name>.png`, chosen turnaround sheet per character
+- `cand/<stage>/…`, candidates, montages and sd-cli logs
+
+Output: `$LIBRARY/<Series>/<Book>/NNN.png` (zero-padded page number), where
+`LIBRARY` is read from `~/.config/book-reader.conf` (shell `KEY="value"` lines).
+Series and Book come from plan.md.
+
+Resume is derived from disk, no state file: a character with `refs/<Name>.png`
+is skipped; a page whose `NNN.png` exists in the library is skipped.
+
+## plan.md format
+
+Written by Gemma, edited by the user. Fixed headings, free prose underneath:
+
+```markdown
+# <Title>
+Series: <series folder name>
+Book: <book folder name>
+Style: <global art style line>
+
+## Characters
+
+### <Name>
+<fixed visual description: age, hair, face, eyes, build, outfit>
+
+## Pages
+
+### 1. <short title>
+<what happens, setting, mood>
+Characters: <Name>, <Name>   (or "none")
+Pose: <body orientation and pose of each named character>
+Framing: <camera angle, shot size, portrait|landscape>
+Model: krea2                 (optional, overrides the base model for this page)
+```
+
+Validation before confirm: title, Series, Book, at least one character and
+one page; every name in `Characters:` exists under `## Characters`; every page
+has `Pose:` when it lists characters. Failures are listed; the user edits or
+asks Gemma to revise.
+
+## Gemma calls
+
+All via `POST localhost:8181/v1/chat/completions`, `model: Gemma4-12B-qat-mtp`.
+
+1. **Draft**: system prompt holds the plan.md format and rules (no text in
+   images, fixed character descriptions, one page = one image, a scene may span
+   several pages). User message: `story.md`. Output: plan.md.
+2. **Revise**: current plan.md + user's instruction → complete new plan.md.
+3. **Compile**: plan.md → plan.json with `response_format` `json_schema`:
+
+```json
+{
+  "title": "", "series": "", "book": "",
+  "characters": [{"name": "", "turnaround_prompt": ""}],
+  "pages": [{
+    "n": 1, "model": "zimage", "orientation": "portrait",
+    "characters": ["Mara", "Jon"],
+    "base_prompt": "",
+    "edits": [{"characters": ["Mara", "Jon"], "prompt": ""}]
+  }]
+}
+```
+
+Prompt-writing rules given to Gemma for compile:
+
+- `turnaround_prompt`: "Character turnaround reference sheet … the same <person>
+  shown three times side by side, full body: front view, side view, back view …
+  plain light-grey background … No text, no labels."
+- `base_prompt`: Style line + scene + full description of every character
+  present + Pose + Framing + "No text, no speech bubbles."
+- `edits`: one entry per group of at most 2 characters (Qwen takes at most 3
+  reference images: the scene plus 2 refs). Prompt changes only heads/faces:
+  "In image 1, change only <who>'s head: give her/him the face, … and hair of
+  the <person> in image N. Keep <who>'s exact pose from image 1: <Pose>. Keep
+  bodies, clothing, other people, background, lighting and art style of image 1
+  unchanged." Pages with no characters have no edits.
+
+Gemma writes prompts only; the script owns every sd-cli setting.
+
+## Model profiles
+
+A dict at the top of the script. Paths under `/data/LLM-models/SD`. Settings
+verified by hand on 2026-10-04:
+
+| profile | use | key args |
+|---|---|---|
+| `zimage` (default base, refs) | t2i | `--diffusion-model z_image_turbo-Q8_0.gguf --vae vae/flux1-ae.safetensors --llm Qwen3-4B-Instruct-2507-Q8_0.gguf --cfg-scale 1.0 --steps 8 --diffusion-fa --offload-to-cpu` |
+| `krea2` (on demand: `--base krea2` or `Model: krea2`) | t2i | `--diffusion-model Krea-2-Turbo-Q6_K.gguf --vae vae/wan_2.1_vae.safetensors --llm Qwen3VL-4B-Instruct-Q8_0.gguf --cfg-scale 1.0 --steps 8 --diffusion-fa --offload-to-cpu` |
+| `qwen_edit` | edit | `--diffusion-model Qwen-Image-2.1-viggle-turbo-v0.3-6step-Q8_0.gguf --vae vae/qwen_image_2.1_vae_bf16.safetensors --llm Qwen3VL-8B-Instruct-Q8_0.gguf --llm_vision mmproj-Qwen3VL-8B-Instruct-F16.gguf --cfg-scale 1.0 --steps 6 --sigmas 1.0,0.9375,0.875,0.75,0.5,0.25,0.0 --sampling-method euler --fa --backend te=cpu,diffusion=vulkan0,vae=vulkan0 --mmap --vae-tiling` |
+
+Sizes: portrait 832x1216, landscape 1216x832, turnaround 1216x832.
+Before edit, reference images are shrunk with `magick -resize`: scene to
+576x832 (portrait) or 832x576 (landscape), turnaround refs to 560x384.
+`--backend te=cpu` without explicit `diffusion=`/`vae=` lands on the iGPU and
+crashes; always pass all three. Edit with `--offload-to-cpu` and full-size refs
+OOM-killed the desktop; do not use it there.
+
+Candidates: `-b 3` per call (one model load), seed random per call and
+recorded in the montage label so a pick can be reproduced. No negative prompts:
+all profiles run at cfg 1.0, where they have no effect.
+
+Measured timings: Z-Image ~150 s/image, Krea2 ~220 s/image, Qwen edit ~410 s
+(140 s of it CPU text encoding, done once per call).
+
+## Review loop
+
+For each stage, the script builds a montage of the candidates with
+`magick montage` (labels 1..3 + seed) and shows it with `kitty +kitten icat`.
+Keys:
+
+- `1`-`3`: pick
+- `r`: regenerate with new seeds
+- `p`: edit this prompt in `$EDITOR`, then regenerate
+- `s` (edit stage only): skip the edit, keep the base image
+- `q`: quit (resume later)
+
+Chained edits (more than 2 characters): each edit group gets its own review;
+the pick from one group is the scene input of the next.
+
+## Error handling
+
+- llama-server unreachable or model unknown: exit with a clear message, no files
+  written.
+- plan.md validation failure: list problems, return to the review loop.
+- sd-cli non-zero exit, missing output, or `[ERROR` in its log: print the last
+  log lines, offer `r` retry or `q` quit. Logs stay in `cand/`.
+- RAM watchdog: while sd-cli runs, poll `MemAvailable` every 2 s; below 2 GB,
+  kill sd-cli and report it.
+- Unload Gemma before every sd-cli stage (idempotent).
+- Ctrl-C anywhere is safe; the next run resumes from disk.
+
+## CLI
+
+```
+fanfictioner story.md [--base zimage|krea2] [--selftest]
+```
+
+## Testing
+
+`fanfictioner --selftest`: plain asserts, no GPU, no server. Covers plan.md
+validation, edit grouping for more than 2 characters, resume detection, and
+sd-cli argument building per profile.
+
+## Out of scope
+
+Text, speech bubbles and captions; multi-panel page layouts; LoRA training;
+sd-server daemon; any GUI beyond the terminal.
+
+## License
+
+GPLv2-only. LICENSE from gnu.org, header in the script, License section and
+Development Approach section in README.