unsafe-rust-attestation SKILL.md skillA
unsafe-rust-attestation from sparq-org/sparq is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sparq-org/sparq/unsafe-rust-attestation@git:20261005.afb6badPins git:20261005.afb6bad in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sparq-org/sparq
- Path
.claude/skills/unsafe-rust-attestation/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261005.afb6bad, committed Oct 5, 2026
- First version recorded
- Jun 15, 2026
- Size
- 8,928 bytes
- Repository stars
- 13
- License
- MIT
How sparq attests memory safety — the forbid(unsafe_code) posture across most crates, the concentrated sparq-core unsafe surface (mmap / dict-spill / SIMD, threat-model boundary B5), the nightly Miri lane, cargo-geiger, and the per-site unsafe-justification register (gap GX-5) — and how to document plus verify every unsafe block for the memory-safety attestation framework. Use when working the memsafety certification worktree, enumerating or justifying an unsafe site, wiring the cargo-geiger…
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
# Unsafe-Rust attestation (sparq) sparq's headline safety claim is memory safety. This skill is how to *attest* it honestly for the `memsafety` certification worktree — the `forbid(unsafe_code)` posture, the concentrated `sparq-core` unsafe surface (threat-model boundary **B5**), and the verification estate (Miri + fuzz + the deterministic oracle). > NON-CANONICAL timing. No measured numbers belong in this file. ## The posture: forbid where you can, concentrate + justify where you can't - **`#![forbid(unsafe_code)]`** is declared in the large majority of workspace crates (sparq-serve, sparq-reason, sparq-zk, sparq-nlq, sparq-shacl, and most others — `grep -rl "forbid(unsafe_code)" crates/`). `forbid` (not `deny`) means the lint can't even be locally `#[allow]`-ed away — a hard compile error if any `unsafe` is introduced. **This is the strongest attestable claim and it's free.** - **`sparq-core` carries the *vast majority* of the `unsafe`, and all of the B5 (untrusted-input) risk.** A few other crates have small, non-B5 unsafe surfaces (e.g. `sparq-vectors` mmap/raw-slice casts, `sparq-cli`'s loader mmap in …
Read the whole file at its exact version.
How to install
mdr add sparq-org/sparq/unsafe-rust-attestation@sha256:22851f4d6bb9fd02The line at the top of this page pins the label git:20261005.afb6bad, 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_jbvuin363jxut53i)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 15, 2026 and Oct 5, 2026, about one every 112 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261005.afb6bad latest | 2026-10-05 | afb6bad | 8,928 B | A | view · diff |
| git:20260615.ee0cdb5 | 2026-06-15 | ee0cdb5 | 9,007 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 (8928 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
sparq-org/sparq · 13 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jbvuin363jxut53i GET https://markdownregistry.com/api/v1/resolve?ref=sparq-org/sparq/unsafe-rust-attestation GET https://markdownregistry.com/api/v1/blob/22851f4d6bb9fd021968389d7546ca2ac9502c7ddf404f0ad5338d60b1dc4d16
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.