# Runner Tune

> Tune an existing runner game — CONFIG difficulty, theme CSS, bloom — without rewriting architecture. Trigger `/runner-tune <game>`.

- Skill: `khaitrang1995/runner-tune` (Agent Skill)
- Install (CLI): `npx skillmds@latest add khaitrang1995/runner-tune`
- Raw SKILL.md: https://api.skillmd.com/api/skills/khaitrang1995/runner-tune/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: KhaiTrang1995 (https://skillmd.com/u/khaitrang1995)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/khaitrang1995/runner-tune

---


# /runner-tune — Difficulty & theme

## Goal

Adjust **numbers and theme** on an existing `games.js` / `index.html`. Do not replace the Spawner/hook architecture unless the user asks.

## Examples

```text
/runner-tune wing --gravity -32 --flap 10
/runner-tune moto --speed-max 50 --accent #33e6ff
/runner-tune loop --jump 15
```

## Process

1. Read current `CONFIG` and `:root` CSS variables.
2. L1 short plan of keys to change.
3. Patch only those keys; keep comments.
4. Suggest playtest checklist (mobile touch, keyboard, mute).

## Do not

- Rewrite mesh builders “for fun”
- Change `mode: 'side'|'forward'` without explicit request
- Invent external leaderboard endpoints

## References

- @../../rules/runner-conventions.md
- @../../rules/approval-gate.md