miri-lang SKILL.md skillA
miri-lang from miri-lang/miri is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add miri-lang/miri/miri-lang@git:20261022.07ce44dPins git:20261022.07ce44d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- miri-lang/miri
- Path
skills/miri-lang/SKILL.md- Versions recorded
- 18
- Latest version
- git:20261022.07ce44d, committed Oct 22, 2026
- First version recorded
- Sep 9, 2026
- Size
- 7,731 bytes
- Repository stars
- 16
- License
- Apache-2.0
Writing Miri source files — syntax, type system, and iteration workflow.
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
# Miri Language Essentials
The short core for writing `.mi` files: how Miri differs from Python and Rust,
the traps that cost earlier agents the most, and the one check → fix → test
loop. Everything else is a lookup, not a read: ask the compiler (see *Looking
things up*) rather than guessing a name.
## Core Syntax
Indentation-sensitive blocks; a `:` puts a one-line body on the header line.
```miri
use system.collections.list
use system.collections.map
struct Point
x int
y int
enum Color
Red
Blue
trait Drawable
fn draw()
class Circle implements Drawable
fn draw(): println("circle")
fn add(a int, b int) int
a + b
fn main()
let x int = 5
var y = 10
y = add(x, y)
let p = Point(3, 4)
var words = Map<String, int>()
words["a"] = 1
let items = List([1, 2, 3])
for item in items
if item > 1 and not (item == 3): println(f"{item} {p.x}")
match Color.Red
Color.Red: println("red")
Color.Blue: println("blue")
match Result.Ok(y)
Result.Ok(v): println(f"ok {v}")
Result.Err: println("err")
let maybe int? = words.get("a")
match maybe
…Read the whole file at its exact version.
How to install
mdr add miri-lang/miri/miri-lang@sha256:19f9d0f372134fdfThe line at the top of this page pins the label git:20261022.07ce44d, 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_ew2pon4myay46kf2)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 18 versions of this file, between Sep 9, 2026 and Oct 22, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261022.07ce44d latest | 2026-10-22 | 07ce44d | 7,731 B | A | view · diff |
| git:20261021.4d43fcd | 2026-10-21 | 4d43fcd | 7,564 B | A | view · diff |
| git:20261015.9f4f190 | 2026-10-15 | 9f4f190 | 7,546 B | A | view · diff |
| git:20261014.5f27c5f | 2026-10-14 | 5f27c5f | 7,426 B | A | view · diff |
| git:20261014.eb448d4 | 2026-10-14 | eb448d4 | 7,395 B | A | view · diff |
| git:20261014.cd65000 | 2026-10-14 | cd65000 | 7,287 B | A | view · diff |
| git:20261014.f6197a6 | 2026-10-14 | f6197a6 | 7,137 B | A | view · diff |
| git:20261013.c7a20ca | 2026-10-13 | c7a20ca | 7,040 B | A | view · diff |
| git:20261012.8a4ac95 | 2026-10-12 | 8a4ac95 | 6,557 B | A | view · diff |
| git:20261011.df24159 | 2026-10-11 | df24159 | 6,478 B | A | view · diff |
| git:20261011.30ac483 | 2026-10-11 | 30ac483 | 6,401 B | A | view · diff |
| git:20261011.765476e | 2026-10-11 | 765476e | 12,209 B | A | view · diff |
| git:20261011.f290c39 | 2026-10-11 | f290c39 | 11,968 B | A | view · diff |
| git:20260910.9fb3520 | 2026-09-10 | 9fb3520 | 12,351 B | A | view · diff |
| git:20260909.26cf43a | 2026-09-09 | 26cf43a | 11,917 B | A | view · diff |
| git:20260909.1e01938 | 2026-09-09 | 1e01938 | 10,536 B | A | view · diff |
| git:20260909.8d2903e | 2026-09-09 | 8d2903e | 10,690 B | A | view · diff |
| git:20260909.c9ddf7a | 2026-09-09 | c9ddf7a | 10,026 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 (7731 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
miri-lang/miri · 16 stars · license Apache-2.0 · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ew2pon4myay46kf2 GET https://markdownregistry.com/api/v1/resolve?ref=miri-lang/miri/miri-lang GET https://markdownregistry.com/api/v1/blob/19f9d0f372134fdf84f19869df2bd1845c5b54fed6a11e50e748526b820674d4
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.