in-game-purchases SKILL.md skillA
in-game-purchases 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/in-game-purchases@git:20261009.8cc5232Pins git:20261009.8cc5232 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/in-game-purchases/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261009.8cc5232, committed Oct 9, 2026
- First version recorded
- Sep 30, 2026
- Size
- 11,253 bytes
- Repository stars
- 86
- License
- MIT
Sell items for Sparks in a game shop via the Summer purchase sheet: checkout, results, not enough Sparks, inventory unlocks, authority grants, store policy.
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
# In-game purchases with Sparks Sparks are Summer's currency. A game never takes money, never holds a balance and never approves a payment. It asks Summer for a checkout, Summer shows its own purchase sheet over the game, and the game reacts to the authoritative result. | The player wants to | Call | Validated by | | --- | --- | --- | | buy an item with Sparks they have | `Summer.client.store.request_checkout(lines)` | the Summer ledger (debit) | | buy Sparks because they are short | no game call: the player gets Sparks in the Summer app | the Summer app | The engine has no call that sells Sparks from inside the game. When a checkout fails with `insufficient_funds`, tell the player they need more Sparks and that they can get them in the Summer app, then let them press Buy again. ## When to sell with Sparks - Sell anything that persists across sessions or devices (cosmetics, unlocks, passes) as a Summer item with a Sparks price. *Why:* the platform owns the item, so ownership survives reinstalls and cannot be forged by editing the game. - Do not invent your own currency that is bought with money. *Why:* Summer …
Read the whole file at its exact version.
How to install
mdr add summerengine/summer/in-game-purchases@sha256:b649f1d8485dcaeeThe line at the top of this page pins the label git:20261009.8cc5232, 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_cq4i7i6neo2yhepk)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 30, 2026 and Oct 9, 2026, about one every 2 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261009.8cc5232 latest | 2026-10-09 | 8cc5232 | 11,253 B | A | view · diff |
| git:20261007.e08cf56 | 2026-10-07 | e08cf56 | 11,835 B | A | view · diff |
| git:20260930.80bb5bf | 2026-09-30 | 80bb5bf | 11,842 B | A | view · diff |
| git:20260930.3cf51d5 | 2026-09-30 | 3cf51d5 | 11,578 B | A | view · diff |
| git:20260930.68bb581 | 2026-09-30 | 68bb581 | 11,414 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 (11253 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_cq4i7i6neo2yhepk GET https://markdownregistry.com/api/v1/resolve?ref=summerengine/summer/in-game-purchases GET https://markdownregistry.com/api/v1/blob/b649f1d8485dcaee9446e0fa4c543dbf4d250b021107c3d47eb4a69576fcd4ba
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.