async-python-patterns SKILL.md skillA

async-python-patterns from event4u-app/agent-config is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add event4u-app/agent-config/async-python-patterns@git:20260822.a7c0f2e

Pins git:20260822.a7c0f2e in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
event4u-app/agent-config
Path
src/skills/async-python-patterns/SKILL.md
Versions recorded
3
Latest version
git:20260822.a7c0f2e, committed Aug 22, 2026
First version recorded
Jun 3, 2026
Size
8,203 bytes
Repository stars
19
License
MIT

When writing Python asyncio code — picking between gather / TaskGroup / wait, structured concurrency, timeouts, cancellation, sync-bridging — decision framework only, cookbook externalized.

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

# async-python-patterns

Decision framework for picking the right Python asyncio primitive. **The pattern cookbook lives upstream** (links in § Provenance) — this skill is the predicate, not the recipe library. Sunset-policy compliant: the 600+ lines of language-specific cookbook stay in authoritative Python docs.

## When to use

- Designing a new async I/O-bound service (FastAPI, aiohttp, async DB client).
- Reviewing a diff that introduces `asyncio.gather`, `asyncio.create_task`, `TaskGroup`, `as_completed`, or `wait_for`.
- Mixing sync and async code (calling sync libs from async context, or vice versa).
- Diagnosing event-loop blocking, never-awaited warnings, or cancellation leaks.

Do NOT use when:

- The work is CPU-bound — async will not help; route to multiprocessing or threadpool.
- The runtime is not Python — read the host runtime's concurrency guide.
- The fix is a single missing `await` — read the upstream tutorial directly.

## Decision framework

### Step 1 — Verify async is the right tool

```
Workload is:
  I/O-bound, many concurrent waits  → async fits (network, disk, IPC).
  CPU-bound (parsing, math, crypto) → async is wrong; use ProcessPoolExecutor.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add event4u-app/agent-config/async-python-patterns@sha256:e5f2ed0ddfa9d73e

The line at the top of this page pins the label git:20260822.a7c0f2e, 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.

Badge

mdr badge

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Versions

The registry has recorded 3 versions of this file, between Jun 3, 2026 and Aug 22, 2026, about one every 40 days.

versioncommittedcommitsizeaudit
git:20260822.a7c0f2e latest2026-08-22 a7c0f2e 8,203 BA view · diff
git:20260613.32486112026-06-13 3248611 8,207 BA view · diff
git:20260603.668ed882026-06-03 668ed88 8,293 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8203 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

GitHub

event4u-app/agent-config · 19 stars · license MIT · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_uugylccnheyyl2b5
GET https://markdownregistry.com/api/v1/resolve?ref=event4u-app/agent-config/async-python-patterns
GET https://markdownregistry.com/api/v1/blob/e5f2ed0ddfa9d73ed3db4379b317cafd68cca8836a2a7e0001b49850293f71ea

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