purpose-properties SKILL.md skillA
purpose-properties 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/purpose-properties@git:20261007.33e0656Pins git:20261007.33e0656 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/purpose-properties/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261007.33e0656, committed Oct 7, 2026
- First version recorded
- Aug 23, 2026
- Size
- 14,253 bytes
- Repository stars
- 51
- License
- MIT
Derive the binding properties your why/how/what impose on everything below them, so no solution can silently contradict your own product definition. Retrofit entry point for projects that started before v0.120.0; also the re-derive path when why/how/what change and every stance below them goes stale.
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
# Purpose Properties Skill Retrofit and re-derive entry point for `purpose.yml#purpose_properties`. **For new projects this runs inside `/mycelium:start` Step 3b.** Use this skill when: - The project existed before **v0.120.0** and has no `purpose_properties` (the retrofit case — every project created before that release, since `/mycelium:start` Step 4 exits for already-initialized projects and never reaches the extraction). - `why`, `how` or `what` changed, so `derived_from_hash` no longer matches and **every stance below it is superseded** (the drift case — this is the one that matters most and the easiest to skip). - A property list exists but the user wants to revisit which properties are `binding`. Full contract: https://github.com/haabe/mycelium/blob/main/docs/purpose-stance.md (it lives in the repository, not in the installed plugin). ## Step 1: Read the current state and say which case this is Read `purpose.yml`. Then say plainly which of these you are in, because the three have different consequences and the user should not have to infer it: - **No `purpose_properties`** → retrofit. Nothing below has ever been checked against the purpose. …
Read the whole file at its exact version.
How to install
mdr add haabe/mycelium/purpose-properties@sha256:be09c6ca74df4715The line at the top of this page pins the label git:20261007.33e0656, 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_fsgj2oacoeraej3d)
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Versions
The registry has recorded 7 versions of this file, between Aug 23, 2026 and Oct 7, 2026, about one every 8 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261007.33e0656 latest | 2026-10-07 | 33e0656 | 14,253 B | A | view · diff |
| git:20260924.fbbac66 | 2026-09-24 | fbbac66 | 14,181 B | A | view · diff |
| git:20260921.3923910 | 2026-09-21 | 3923910 | 14,013 B | A | view · diff |
| git:20260831.0009e37 | 2026-08-31 | 0009e37 | 12,011 B | A | view · diff |
| git:20260823.de1bb21 | 2026-08-23 | de1bb21 | 9,955 B | A | view · diff |
| git:20260823.33b7a92 | 2026-08-23 | 33b7a92 | 7,665 B | A | view · diff |
| git:20260823.5aafaea | 2026-08-23 | 5aafaea | 5,700 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 (14253 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_fsgj2oacoeraej3d GET https://markdownregistry.com/api/v1/resolve?ref=haabe/mycelium/purpose-properties GET https://markdownregistry.com/api/v1/blob/be09c6ca74df47151bb9348c50e1b6f2cb979a960d3209d7f00076c29f4e2881
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.