chore: share game-studio hermes plugin

.hermes/plugins/game-studio/skills/sprite-pipeline/SKILL.md

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+---
+name: sprite-pipeline
+description: Generate and normalize 2D sprite animations. Use when the user asks for full-strip generation from approved source frames, consistent anchor and scale normalization, or preview assets for browser-game animation.
+---
+
+# Sprite Pipeline
+
+## Overview
+
+Use this skill for 2D sprite generation and normalization. This workflow is intentionally anchored around one approved frame and a whole-strip generation pass because frame-by-frame generation drifts too easily.
+
+This skill is 2D-specific. If the request is for 3D characters, meshes, or materials, route back through `../game-studio/SKILL.md`.
+
+## Core Workflow
+
+1. Start from an approved in-game seed frame.
+   - The seed frame should already reflect the right silhouette, palette, costume, and proportions.
+2. Build a larger transparent reference canvas around that frame.
+   - Use `../../scripts/build_sprite_edit_canvas.py`.
+3. Ask for the full animation strip in one edit request.
+   - Do not generate each frame independently unless the user explicitly accepts lower consistency.
+4. Normalize the result into fixed-size game frames.
+   - Use `../../scripts/normalize_sprite_strip.py`.
+   - Use one shared scale across the whole strip.
+   - Align frames with one shared anchor, typically bottom-center.
+5. Optionally lock frame 01 back to the shipped seed frame.
+   - Do this when the animation should begin from the exact idle or base pose already in game.
+6. Render a preview sheet and inspect the animation in-engine before approving it.
+   - Use `../../scripts/render_sprite_preview_sheet.py`.
+
+## Prompting Rules
+
+Always preserve these invariants in the prompt:
+
+- same character
+- same facing direction
+- same palette family
+- same silhouette family
+- same readable face or key features
+- same outfit proportions
+- transparent background
+- exact frame count and slot layout
+
+Always ask for:
+
+- one strip at once
+- a transparent canvas
+- no scenery, labels, or poster composition
+- crisp pixel-art clusters for pixel work
+- production asset tone, not concept art
+
+## Using Image Generation
+
+For live asset generation or edits, use the installed `imagegen` skill in this workspace. This skill defines the game-specific process; `imagegen` handles the API-backed generation or edit execution.
+
+## Script Recipes
+
+Create a reference canvas:
+
+```bash
+python3 scripts/build_sprite_edit_canvas.py \
+  --seed output/sprites/idle-01.png \
+  --out output/sprites/hurt-edit-canvas.png \
+  --frames 4 \
+  --slot-size 256 \
+  --canvas-size 1024
+```
+
+Normalize a raw strip:
+
+```bash
+python3 scripts/normalize_sprite_strip.py \
+  --input output/sprites/hurt-raw.png \
+  --out-dir output/sprites/hurt \
+  --frames 4 \
+  --frame-size 64 \
+  --anchor output/sprites/idle-01.png \
+  --lock-frame1
+```
+
+Render a preview sheet:
+
+```bash
+python3 scripts/render_sprite_preview_sheet.py \
+  --frames-dir output/sprites/hurt \
+  --out output/sprites/hurt-preview.png \
+  --columns 4
+```
+
+## Quality Gates
+
+- proportions stay stable across frames
+- frame-to-frame size does not drift
+- action reads clearly at game scale
+- transparency is preserved
+- frame 01 matches the shipped sprite when lockback is enabled
+- preview looks correct before any in-engine asset index update
+
+## References
+
+- Detailed workflow: `../../references/sprite-pipeline.md`
+- Shared frontend context: `../game-ui-frontend/SKILL.md`

.hermes/plugins/game-studio/skills/sprite-pipeline/agents/openai.yaml

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+interface:
+  display_name: "Sprite Pipeline"
+  short_description: "Generate and normalize 2D sprite animations"
+  default_prompt: "Create and normalize 2D sprite animation assets for a browser game with consistent scale and anchors."