currency-dual SKILL.md skillA
currency-dual 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/currency-dual@git:20260913.3c614b8Pins git:20260913.3c614b8 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/currency-dual/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260913.3c614b8, committed Sep 13, 2026
- First version recorded
- Sep 12, 2026
- Size
- 2,013 bytes
- Repository stars
- 12
- License
- MIT
Use when a game has one or more wallets, earned/purchased currency, event tokens, conversions, grants, spends, refunds, or balances that can duplicate, go negative, mix identities, or become hard to audit.
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
# Currency Dual This skill owns **wallet identity and the currency ledger**. Store purchase verification/ownership belongs to `entitlement-grant`; offers belong to `game-monetization`/`iap-offers`; vendor pricing belongs to `shop-price`. ## Modes | Mode | Wallet pattern | |---|---| | one-wallet | one gameplay wallet | | soft-hard | separate earned and purchased/premium wallet classes | | battle-token | event/match/season token wallet | Names are examples. A project may have additional wallets when each has explicit ownership and accounting rules. ## Ledger contract Every wallet has a stable wallet ID, currency definition ID and integer/fixed-point balance representation appropriate to the economy. Every grant, spend, conversion, refund and correction writes a ledger entry with stable transaction ID, reason/source and signed delta. Applying the same transaction ID twice is idempotent. A spend validates sufficient balance or an explicit overdraft rule before commit. Multi-wallet conversion either commits both ledger sides atomically or neither side. …
Read the whole file at its exact version.
How to install
mdr add jammyfu/open-game-skills/currency-dual@sha256:180f6cdd227f36adThe line at the top of this page pins the label git:20260913.3c614b8, 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_vcbtaokedt53obyk)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 12, 2026 and Sep 13, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260913.3c614b8 latest | 2026-09-13 | 3c614b8 | 2,013 B | A | view · diff |
| git:20260912.5f6e976 | 2026-09-12 | 5f6e976 | 835 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 (2013 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_vcbtaokedt53obyk GET https://markdownregistry.com/api/v1/resolve?ref=jammyfu/open-game-skills/currency-dual GET https://markdownregistry.com/api/v1/blob/180f6cdd227f36adfb3c7ada69026029e4710e3c12c35037b94189705d2ca067
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.