migrate-from-legacy SKILL.md skillA
migrate-from-legacy 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/migrate-from-legacy@git:20260929.4068dedPins git:20260929.4068ded 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/migrate-from-legacy/SKILL.md- Versions recorded
- 6
- Latest version
- git:20260929.4068ded, committed Sep 29, 2026
- First version recorded
- May 9, 2026
- Size
- 11,663 bytes
- Repository stars
- 51
- License
- MIT
Migrate a Mycelium project from legacy install (npx-degit, framework files in .claude/) to plugin install (framework lives in plugin cache, .claude/ holds project state only). Detects current install form, walks the user through plugin installation, runs the migration script, and verifies project state survived. Idempotent — safe to invoke on already-migrated projects.
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
# Migrate from legacy to plugin form
When this skill runs, walk the user through moving from legacy install to plugin install. The migration is **non-destructive** to project state: canvas, diamonds, memory, decision log, evals, and active metrics are preserved. Only framework reference content (skills, hooks, engine, scripts, schemas, etc.) is removed from `.claude/` — that content now ships in the plugin cache.
## Step 1: Detect current install form
Check the project's `.claude/` directory:
```bash
test -d "${CLAUDE_PROJECT_DIR:-.}/.claude/skills" && echo "legacy framework files present" || echo "no legacy framework files"
test -d "${CLAUDE_PROJECT_DIR:-.}/.claude/canvas" && echo "project state present" || echo "no project state"
```
Three states:
- **Legacy install** (skills/ + canvas/ both present): proceed to Step 2.
- **Already migrated** (canvas/ present, skills/ absent): tell the user "This project is already on plugin form. No migration needed." and exit.
- **Empty** (neither present): tell the user "No Mycelium install detected. Run `/mycelium:start` to bootstrap a fresh plugin install." and exit.
## Step 2: Verify the plugin is installed
…Read the whole file at its exact version.
How to install
mdr add haabe/mycelium/migrate-from-legacy@sha256:35b36e0bef44ec0cThe line at the top of this page pins the label git:20260929.4068ded, 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_mpsiaw3kmiug5zsl)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between May 9, 2026 and Sep 29, 2026, about one every 29 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260929.4068ded latest | 2026-09-29 | 4068ded | 11,663 B | A | view · diff |
| git:20260704.7639f18 | 2026-07-04 | 7639f18 | 11,653 B | A | view · diff |
| git:20260525.9fac942 | 2026-05-25 | 9fac942 | 11,653 B | A | view · diff |
| git:20260513.3eed9d8 | 2026-05-13 | 3eed9d8 | 11,333 B | A | view · diff |
| git:20260509.0908e37 | 2026-05-09 | 0908e37 | 10,414 B | A | view · diff |
| git:20260509.34ea768 | 2026-05-09 | 34ea768 | 9,703 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 (11663 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_mpsiaw3kmiug5zsl GET https://markdownregistry.com/api/v1/resolve?ref=haabe/mycelium/migrate-from-legacy GET https://markdownregistry.com/api/v1/blob/35b36e0bef44ec0cd377d5568d671d149a457d43caa4b54a266b854b9b3f516c
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.