design-mechanic SKILL.md skillA
design-mechanic from summerengine/summer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add summerengine/summer/design-mechanic@git:20261010.4ade947Pins git:20261010.4ade947 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- summerengine/summer
- Path
library/skills/design-mechanic/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261010.4ade947, committed Oct 10, 2026
- First version recorded
- Sep 1, 2026
- Size
- 12,076 bytes
- Repository stars
- 86
- License
- MIT
Design one game mechanic in detail — input, response, feedback, failure modes, depth, tunables — outputs a design doc, node-graph sketch, GDScript stub.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# /design-mechanic — Design One Mechanic in Detail
## Overview
A "mechanic" is a verb the player performs that produces a meaningful response from the world. Not a system. Not a feature. A verb with feedback. This skill walks the five layers of a real mechanic: **input → response → feedback → failure modes → depth** — then drops a node-graph sketch + GDScript stub into the project so the next session can implement it.
**Core principle:** a mechanic is only as good as its weakest feedback layer. A perfect parry with no audio cue is broken. A great audio cue with floaty input is broken. Walk all five layers before scaffolding.
## Steps
### 1. Pin which mechanic
Ask exactly one question and wait:
> Which mechanic? (e.g., "double-jump", "parry", "stamina-dash", "pickup", "lock-on", "crafting-recipe-craft").
If the user gives a system name ("inventory", "combat"), push back:
> Inventory is a system, not a mechanic. The mechanics inside it are: pickup, equip, drop, use, swap. Which one?
### 2. Read context if available
If `.summer/GameSoul.md` exists, read it. The mechanic should fit the game brief, not exist in isolation.
```
Read .summer/GameSoul.md
```
…Read the whole file at its exact version.
How to install
mdr add summerengine/summer/design-mechanic@sha256:ea1ea9fc4bd0d3ceThe line at the top of this page pins the label git:20261010.4ade947, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_56uamvtdve5is7a7)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 1, 2026 and Oct 10, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261010.4ade947 latest | 2026-10-10 | 4ade947 | 12,076 B | A | view · diff |
| git:20260911.b4df358 | 2026-09-11 | b4df358 | 12,173 B | A | view · diff |
| git:20260910.faf61c2 | 2026-09-10 | faf61c2 | 12,351 B | A | view · diff |
| git:20260902.548800b | 2026-09-02 | 548800b | 12,344 B | A | view · diff |
| git:20260901.0837e7a | 2026-09-01 | 0837e7a | 12,370 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12076 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
summerengine/summer · 86 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_56uamvtdve5is7a7 GET https://markdownregistry.com/api/v1/resolve?ref=summerengine/summer/design-mechanic GET https://markdownregistry.com/api/v1/blob/ea1ea9fc4bd0d3cedc970f686c22bb7716e4de8877444ceb042dcf98134fda85
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.