difficulty-design SKILL.md skillA
difficulty-design from jammyfu/open-game-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jammyfu/open-game-skills/difficulty-design@git:20260913.9a372a5Pins git:20260913.9a372a5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jammyfu/open-game-skills
- Path
skills/disciplines/difficulty-design/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260913.9a372a5, committed Sep 13, 2026
- First version recorded
- Sep 12, 2026
- Size
- 1,889 bytes
- Repository stars
- 12
- License
- MIT
Use when a project needs explicit difficulty modes, scaling rules, challenge curves or assist policies with measurable outcomes instead of hidden HP-only inflation or genre-specific defaults.
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
# Difficulty design Difficulty is a versioned project policy, not a fixed ordering of knobs. ## Contract Publish: - stable `difficulty_policy_id` and revision - named mode/scaling policy - affected systems and excluded systems - measurement context: build, segment, player cohort or test mode - challenge metrics and guardrails - transition/switch rules, including whether mid-session changes are allowed - evidence required to accept a tuning change Possible levers include space, information, resources, enemy composition, timing windows, numbers, assists, checkpoints or other project-defined systems. Their order and use depend on the game. ## Ownership This skill selects and evaluates the difficulty policy. It does not directly own combat clocks, hitboxes, economy ledgers, navigation, camera or save state. ## Rules 1. Scaling must be observable in project data or documentation; no silent rule changes that cannot be reproduced. 2. Static regions, level sync, rank-based scaling, adaptive systems and fixed challenge are all valid when explicitly chosen. 3. Readability comes from the owning tell/UI/accessibility contracts. High threat does not imply one universal tell length. …
Read the whole file at its exact version.
How to install
mdr add jammyfu/open-game-skills/difficulty-design@sha256:67cb2bba333647d0The line at the top of this page pins the label git:20260913.9a372a5, 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_raohvbj7glrthnsr)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Sep 12, 2026 and Sep 13, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260913.9a372a5 latest | 2026-09-13 | 9a372a5 | 1,889 B | A | view · diff |
| git:20260912.8b19998 | 2026-09-12 | 8b19998 | 2,008 B | A | view · diff |
| git:20260912.c1de365 | 2026-09-12 | c1de365 | 1,945 B | A | view · diff |
| git:20260912.620e743 | 2026-09-12 | 620e743 | 1,700 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 (1889 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
jammyfu/open-game-skills · 12 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_raohvbj7glrthnsr GET https://markdownregistry.com/api/v1/resolve?ref=jammyfu/open-game-skills/difficulty-design GET https://markdownregistry.com/api/v1/blob/67cb2bba333647d089e08109b6b0b7ac82faf594b457389b2b6cb235598d9e97
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.