harms-check SKILL.md skillA
harms-check from haabe/mycelium is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add haabe/mycelium/harms-check@git:20261016.5efa05aPins git:20261016.5efa05a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- haabe/mycelium
- Path
plugins/mycelium/skills/harms-check/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261016.5efa05a, committed Oct 16, 2026
- First version recorded
- Jul 11, 2026
- Size
- 6,967 bytes
- Repository stars
- 51
- License
- MIT
Use when building anything USER-FACING (or with persuasion/retention/cancellation/consent/pricing flows, or that touches vulnerable people) to surface design-level harm the security/privacy/compliance gates miss: dark/deceptive patterns and foreseeable misuse. Assumes the product works as designed and asks who it could harm and whether it is Happier-negative. NUDGE, not a block.
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
# Harms Check Skill Design-time harm-to-users check — the safety-by-design lens the security/privacy/compliance gates structurally miss. Assumes the product works EXACTLY as designed. `/threat-model` (STRIDE) asks how an attacker breaks it; `/privacy-check` asks about personal data; neither asks: **who could this harm when it works as intended, and how could a legitimate feature be misused?** This is the design-time front-end of the BVSSH **Happier** dimension: a manipulative or harmful design is Happier-negative by definition, and this gate catches it before `/bvssh-check` would only measure it post-hoc. ## When to run (JiT — conditional, NOT universal) Fires only when the product-shape warrants it: - **User-facing** product/feature (real people use it), OR - has **persuasion / retention / conversion / cancellation / consent / pricing** flows (the dark-pattern surface), OR - **touches vulnerable people** (children, patients, financially- or otherwise at-risk). If none apply (internal dev tooling, a library, a build script), **SKIP — say so and move on.** This is a NUDGE, never a hard block. …
Read the whole file at its exact version.
How to install
mdr add haabe/mycelium/harms-check@sha256:2c04c6fdad3e2688The line at the top of this page pins the label git:20261016.5efa05a, 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_w7snjk3csbirqufa)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 11, 2026 and Oct 16, 2026, about one every 48 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.5efa05a latest | 2026-10-16 | 5efa05a | 6,967 B | A | view · diff |
| git:20261011.d568160 | 2026-10-11 | d568160 | 6,919 B | A | view · diff |
| git:20260711.b293f0c | 2026-07-11 | b293f0c | 5,269 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 (6967 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
haabe/mycelium · 51 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_w7snjk3csbirqufa GET https://markdownregistry.com/api/v1/resolve?ref=haabe/mycelium/harms-check GET https://markdownregistry.com/api/v1/blob/2c04c6fdad3e268833fc15bee061c7b39083c448591bb5967aeaec15b70dfc85
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.