sf-caller SKILL.md skillA
sf-caller from product-on-purpose/agent-skills-toolkit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add product-on-purpose/agent-skills-toolkit/sf-caller@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- product-on-purpose/agent-skills-toolkit
- Path
tests/fixtures/golden/subagent-fixture/skills/sf-caller/SKILL.md- Versions recorded
- 2
- Latest version
- v0.1.0, committed Aug 11, 2026
- First version recorded
- May 30, 2026
- Size
- 205 bytes
- Repository stars
- 3
- License
- Apache-2.0
Calls the worker subagent to do a thing. Use when delegating work to sf-worker.
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
# sf-caller Delegates to sf-worker.
Read the whole file at its exact version.
How to install
mdr add product-on-purpose/agent-skills-toolkit/sf-caller@sha256:f660b33fe4d33ec5The line at the top of this page pins the label v0.1.0, 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_2i7qb4aaywag6xik)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 30, 2026 and Aug 11, 2026, about one every 73 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.0 latest | 2026-08-11 | bf2745f | 205 B | A | view · diff |
| v0.1.0 | 2026-05-30 | c2dca9b | 201 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 (205 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
product-on-purpose/agent-skills-toolkit · 3 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2i7qb4aaywag6xik GET https://markdownregistry.com/api/v1/resolve?ref=product-on-purpose/agent-skills-toolkit/sf-caller GET https://markdownregistry.com/api/v1/blob/f660b33fe4d33ec53150ada25bd3259b213b044fa5e41ca61bbd81967ce9a12a
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.