sley SKILL.md skillA
sley from sley-lang/sley is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sley-lang/sley/sley@git:20261030.3a1db9dPins git:20261030.3a1db9d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sley-lang/sley
- Path
skills/sley/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261030.3a1db9d, committed Oct 30, 2026
- First version recorded
- Oct 30, 2026
- Size
- 14,754 bytes
- Repository stars
- 13
- License
- Apache-2.0
Write, test and submit Sley programs with the `sley-agent` workbench, authoring in its typed Python dialect. Use when a task asks for a Sley function or program, mentions `sley-agent`, `try --familiar`, drafts such as `d1@r1`, or a Sley refusal symbol (`AGENT_FRAME_INVALID`, `CAP_BUDGET_EXCEEDED`, `TXN_TEST_EVIDENCE_UNSUPPORTED`, ...).
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
# Writing Sley programs Sley is a programming system built for agents. A Sley program is a typed, content-addressed semantic graph of functions, types, constants and tests, not a source file. You change it by proposing a candidate; a deterministic kernel validates the candidate in ordered phases and refuses anything it cannot check, with a stable symbol. `sley-agent` is the workbench that builds candidates, runs their tests and submits them. You can write candidates in a typed Python dialect. It is an optional, non-canonical authoring input: `try --familiar` parses the text once into a structured frame, and from then on drafts, submissions and commits use the frame and the graph, never the text. Nothing renders a program back into Python. The JSON frame form (AF1) is in `sley-agent help`. Every example below was run against the released 2.1.7 binaries. To try the dialect before installing, use the [Sley Playground](https://sleylang.org/playground): it compiles and calls functions in the browser with the same compiler and VM (inline tests need `sley-agent`). ## Install and verify Linux x86_64 only. ```sh …
Read the whole file at its exact version.
How to install
mdr add sley-lang/sley/sley@sha256:f577116d4f68b940The line at the top of this page pins the label git:20261030.3a1db9d, 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_4dnali6fegwiek3f)
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Versions
The registry has recorded 2 versions of this file, all committed on Oct 30, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261030.3a1db9d latest | 2026-10-30 | 3a1db9d | 14,754 B | A | view · diff |
| git:20261030.4a5bc9c | 2026-10-30 | 4a5bc9c | 14,545 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 (14754 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
sley-lang/sley · 13 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4dnali6fegwiek3f GET https://markdownregistry.com/api/v1/resolve?ref=sley-lang/sley/sley GET https://markdownregistry.com/api/v1/blob/f577116d4f68b940dea9ad69411b515a13952246e1b7d56fee1d422a424c8ed1
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.