edge-case-hunter SKILL.md skillA
edge-case-hunter from arcanada-one/datarim is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add arcanada-one/datarim/edge-case-hunter@git:20261004.8dfccd1Pins git:20261004.8dfccd1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- arcanada-one/datarim
- Path
skills/edge-case-hunter/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261004.8dfccd1, committed Oct 4, 2026
- Size
- 3,410 bytes
- Repository stars
- 16
- License
- MIT
Enumerates boundary, degenerate, and failure inputs an artifact does not visibly handle. Sibling of adversarial-review; loaded at /dr-plan and /dr-qa.
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
# Edge-Case Hunter — Enumerate What the Happy Path Ignores Most artifacts are written for the case the author imagined. This skill systematically surfaces the cases they did not: the empty, the maximal, the concurrent, the interrupted, the malformed. It is the boundary-focused sibling of `adversarial-review` (whole-artifact attack) and `structure-review` (organisation and contradiction). The deliverable is a **checklist of concrete edge inputs**, each tagged handled / unhandled / out-of-scope-by-design — not a vague "consider edge cases" note. ## Dimensions to sweep Walk every dimension; skip one only after stating why it does not apply. - **Cardinality:** zero items, exactly one, exactly the limit, one over the limit, and "very many". Off-by-one lives here. - **Emptiness / absence:** empty string vs null vs missing vs whitespace-only; absent file vs empty file vs unreadable file; a config key set to "". - **Boundaries of value:** min, max, min−1, max+1, zero, negative, the units boundary (bytes↔KB, ms↔s), overflow, precision loss. - **Ordering & timing:** out-of-order arrival, duplicate delivery, the second …
Read the whole file at its exact version.
How to install
mdr add arcanada-one/datarim/edge-case-hunter@sha256:29ec9d7e7464cdc4The line at the top of this page pins the label git:20261004.8dfccd1, 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_grzengqz5b23okud)
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Versions
The registry has recorded 1 version of this file, committed on Oct 4, 2026.
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 (3410 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
arcanada-one/datarim · 16 stars · license MIT · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_grzengqz5b23okud GET https://markdownregistry.com/api/v1/resolve?ref=arcanada-one/datarim/edge-case-hunter GET https://markdownregistry.com/api/v1/blob/29ec9d7e7464cdc48f5500f42e947f6ed1b85628aef775aa3213a95deebf4035
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.