using-string SKILL.md skillA
using-string from string-os/string is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add string-os/string/using-string@git:20260610.a35df04Pins git:20260610.a35df04 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- string-os/string
- Path
plugins/string/skills/using-string/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260610.a35df04, committed Jun 10, 2026
- First version recorded
- Jun 4, 2026
- Size
- 1,299 bytes
- Repository stars
- 79
- License
- MIT
Use the installed String MCP tool for String apps, SFMD, web pages, shell sessions, and commands like /open, /act, /install, or /set.
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
# Using String
You have the installed String MCP tool named `string`; some hosts display it with a server prefix.
Call it with `{ topic, cmd }`, for example `{ "topic": "main", "cmd": "/info" }`.
Use topics like `main`, `app:<name>`, `app:<name>:<config>`, `bash:<name>`, or hubs `app`, `tool`, `bash`, `event`, `system`.
`cmd` must start with `/`; use `/help`, `/info`, and `/act --help` to discover what to do.
Use `/open` to read files, URLs, or apps; installed apps can run `/act.<name>` directly from `app:<name>` if you already know the action.
Use `/edit` to inspect raw files, `/write` to create or overwrite, `/append` to add content, and `/replace` for exact text, block, or line-range edits.
Use `/install` to add apps; `/set $VAR = "..."` for app credentials.
Use topic `event` with `/events`, `/events.read <id>`, and `/events.ack <id>` to handle local webhook messages.
Claude Code may also receive those webhook messages through the String channel, but ack still happens with `/events.ack <id>`.
Read the payload inside `<𝒞=string:TOPIC>...</𝒞>` and follow `Recovery:` or `next:` hints.Read the whole file at its exact version.
How to install
mdr add string-os/string/using-string@sha256:4353f6cf49a6637aThe line at the top of this page pins the label git:20260610.a35df04, 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_phcpjljkr7nbfzlm)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Jun 4, 2026 and Jun 10, 2026, about one every 2 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260610.a35df04 latest | 2026-06-10 | a35df04 | 1,299 B | A | view · diff |
| git:20260609.51c4915 | 2026-06-09 | 51c4915 | 1,049 B | A | view · diff |
| git:20260604.a9cc30b | 2026-06-04 | a9cc30b | 896 B | A | view · diff |
| git:20260604.d7b64ca | 2026-06-04 | d7b64ca | 825 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 (1299 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
string-os/string · 79 stars · license MIT · pushed 2026-10-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_phcpjljkr7nbfzlm GET https://markdownregistry.com/api/v1/resolve?ref=string-os/string/using-string GET https://markdownregistry.com/api/v1/blob/4353f6cf49a6637adfa171a73ec72f6c6f6ee234cca2999e136105830ce39954
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.
More from string-os/string
Every file in string-os/string