m-custom-functions SKILL.md skillA
m-custom-functions from csalcedodatabi/powerquery-m-for-agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add csalcedodatabi/powerquery-m-for-agents/m-custom-functions@git:20261001.aec5b2cPins git:20261001.aec5b2c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- csalcedodatabi/powerquery-m-for-agents
- Path
planned/m-custom-functions/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261001.aec5b2c, committed Oct 1, 2026
- Size
- 1,415 bytes
- Repository stars
- 4
- License
- MIT
Use when writing a custom Power Query M function — typed and optional parameters, return types, recursion with @, functions that take functions, attaching Documentation metadata with Value.ReplaceType so the function shows a description and examples in the editor, or turning a query into a reusable function. Triggers on "M custom function", "Power Query function parameters", "optional parameter M", "Value.ReplaceType", "document my function", "Documentation.Name…
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
# M Custom Functions > **Status.** Stub. Scope fixed in > [the design spec](../../docs/superpowers/specs/2026-09-28-powerquery-m-for-agents-design.md) > (§4). ## Planned contents | File | Covers | |---|---| | `references/syntax.md` | `(x as number, optional y as nullable text) as table =>`, what `optional` really implies for the type | | `references/documentation-metadata.md` | `Value.ReplaceType` with `Documentation.*` — the same metadata `m-reference` reads from `#shared` | | `references/recursion.md` | `@` scoping, and when `List.Generate` is the better answer | | `references/function-values.md` | Passing functions, `each` as sugar for `(_) =>`, closures over `let` variables | ## Related skills - **`m-reference`** — check a library function does not already do it. - **`m-iteration`** — loops without recursion.
Read the whole file at its exact version.
How to install
mdr add csalcedodatabi/powerquery-m-for-agents/m-custom-functions@sha256:36a7a3de710f4229The line at the top of this page pins the label git:20261001.aec5b2c, 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_553qrwieicvfzkzn)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 1, 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 (1415 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
csalcedodatabi/powerquery-m-for-agents · 4 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_553qrwieicvfzkzn GET https://markdownregistry.com/api/v1/resolve?ref=csalcedodatabi/powerquery-m-for-agents/m-custom-functions GET https://markdownregistry.com/api/v1/blob/36a7a3de710f4229c8b93038eace35d690fd8894cdfb986f39d9933102f6b2e0
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.