dart-asset-normalization

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Aktualisiert1. Mai 2026 um 11:12

Normalize and verify bundled Dart marker PNG assets in autodarts-xconfig. Use when a file under `src/assets/darts/` is added, changed, replaced, visually misaligned, or when Dart marker tips no longer sit exactly on the board marker. Also use when updating Dart image geometry constants or asset tests.

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thomasasen

thomasasen/autodarts-xconfig

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SKILL.md

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name	dart-asset-normalization
description	Normalize and verify bundled Dart marker PNG assets in autodarts-xconfig. Use when a file under `src/assets/darts/` is added, changed, replaced, visually misaligned, or when Dart marker tips no longer sit exactly on the board marker. Also use when updating Dart image geometry constants or asset tests.

Goal

Keep every bundled Dart marker image aligned to the runtime hotspot used by dart-marker-darts.

Core Rules

work in src/assets/darts/, not dist/
use npm run check:darts before and after changes to Dart PNGs
use npm run normalize:darts to repair misaligned Dart PNGs
do not manually edit PNG bytes or hand-tune per-image offsets unless the script cannot safely normalize an asset
keep runtime constants in src/features/dart-marker-darts/logic.js aligned with the normalizer target canvas
update tests/runtime/feature-assets.test.js hashes when normalized image bytes intentionally change

Workflow

Inspect changed files with git diff --name-only and identify any src/assets/darts/Dart_*.png changes.
Run npm run check:darts.
If the check fails, run npm run normalize:darts.
Re-run npm run check:darts.
If PNG bytes changed intentionally, update the asset hash snapshots in tests/runtime/feature-assets.test.js.
Run the closest tests:
- node --test tests/runtime/feature-assets.test.js
- node --test tests/runtime/dart-marker-darts-runtime.test.js
For final validation, use $validate-repo-change.

Hotspot Contract

The normalizer targets the constants exported by src/features/dart-marker-darts/logic.js:

canvas width: DART_IMAGE_SOURCE_WIDTH
canvas height: DART_IMAGE_SOURCE_HEIGHT
tip y-position: DART_IMAGE_TIP_Y
tip x-position: 0

The script estimates the tip from the leftmost visible alpha band. This is appropriate for the current Dart assets because every Dart points left and uses transparency around the graphic.

Failure Handling

If npm run normalize:darts reports that normalization would clip visible pixels, do not force it. The image needs manual canvas preparation or a larger shared canvas plus matching runtime constant/test updates.

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name	dart-asset-normalization
description	Normalize and verify bundled Dart marker PNG assets in autodarts-xconfig. Use when a file under `src/assets/darts/` is added, changed, replaced, visually misaligned, or when Dart marker tips no longer sit exactly on the board marker. Also use when updating Dart image geometry constants or asset tests.

Goal

Keep every bundled Dart marker image aligned to the runtime hotspot used by dart-marker-darts.

Core Rules

work in src/assets/darts/, not dist/
use npm run check:darts before and after changes to Dart PNGs
use npm run normalize:darts to repair misaligned Dart PNGs
do not manually edit PNG bytes or hand-tune per-image offsets unless the script cannot safely normalize an asset
keep runtime constants in src/features/dart-marker-darts/logic.js aligned with the normalizer target canvas
update tests/runtime/feature-assets.test.js hashes when normalized image bytes intentionally change

Workflow

Inspect changed files with git diff --name-only and identify any src/assets/darts/Dart_*.png changes.
Run npm run check:darts.
If the check fails, run npm run normalize:darts.
Re-run npm run check:darts.
If PNG bytes changed intentionally, update the asset hash snapshots in tests/runtime/feature-assets.test.js.
Run the closest tests:
- node --test tests/runtime/feature-assets.test.js
- node --test tests/runtime/dart-marker-darts-runtime.test.js
For final validation, use $validate-repo-change.

Hotspot Contract

The normalizer targets the constants exported by src/features/dart-marker-darts/logic.js:

canvas width: DART_IMAGE_SOURCE_WIDTH
canvas height: DART_IMAGE_SOURCE_HEIGHT
tip y-position: DART_IMAGE_TIP_Y
tip x-position: 0

The script estimates the tip from the leftmost visible alpha band. This is appropriate for the current Dart assets because every Dart points left and uses transparency around the graphic.