rust-async-concurrency skillA
rust-async-concurrency is agent-read markdown (skill) from fusengine/agents: Use when writing async Rust — spawning tasks, sharing state across tasks/threads, choosing channels vs mutexes, or hitting Send-bound errors with async traits. Not for HTTP service structure (rust-web-backend) or sync-only ownership (rust-core-language)..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
<objective> This skill covers writing and reviewing async Rust code on the tokio runtime: spawning and supervising tasks (spawn, JoinHandle, JoinSet, spawn_blocking), choosing shared-state primitives (Mutex, RwLock, atomics) versus message passing, and picking the right channel shape (mpsc, oneshot, broadcast, watch). It also covers the async-fn-in-traits Send problem — why `async fn` in traits does not give Send futures by default and how to work around it. Out of scope: HTTP service structure (routing, extractors, middleware) is owned by rust-web-backend; sync-only ownership and borrowing questions belong to rust-core-language. </objective> # Rust Async & Concurrency ## Agent Workflow (MANDATORY) Before writing async code, spawn in parallel: 1. **fuse-ai-pilot:explore-codebase** — find the existing runtime, channel, and lock patterns already in use 2. **fuse-ai-pilot:research-expert** — verify current tokio/crate APIs via Context7/Exa (async APIs churn) 3. **mcp__context7__query-docs** — pull exact signatures for the primitives you touch After writing, run **fuse-ai-pilot:sniper**. --- ## Runtime Landscape | Runtime | Reality | |---------|---------| …
Read the whole file at its exact version.
How to install
mdr add fusengine/agents/rust-async-concurrency@git:20260729.3b91eedmdr add fusengine/agents/rust-async-concurrency@sha256:e24f8b84d9fa4a05Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_vosr67m7faj62bfv)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.3b91eed latest | 2026-07-29 | 3b91eed | 5,428 B | A | view · diff |
| git:20260705.8c2f9bc | 2026-07-05 | 8c2f9bc | 4,968 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 (5428 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
fusengine/agents · 28 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vosr67m7faj62bfv GET https://markdownregistry.com/api/v1/resolve?ref=fusengine/agents/rust-async-concurrency GET https://markdownregistry.com/api/v1/blob/e24f8b84d9fa4a05262eff54617e6518c5fa5b35fe4399ec3ec32a069a304886
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