Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add whit3rabbit/claude-zig-skill --skill zig-async-skillgit clone --depth 1 https://github.com/whit3rabbit/claude-zig-skillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/whit3rabbit/claude-zig-skill/zig-async-skill)<a href="https://agentmods.dev/skills/whit3rabbit/claude-zig-skill/zig-async-skill"><img src="https://agentmods.dev/badge/skills/whit3rabbit/claude-zig-skill/zig-async-skill.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00072 | $0.02006 |
| Opus 5 | $0.00036 | $0.01003 |
| Sonnet 5 | $0.00014 | $0.00401 |
| Haiku 4.5 | $0.00007 | $0.00201 |
Grade A, and why
zig-async-io scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 258 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Zig Async I/O Skill (0.16.0+)
Overview
Zig 0.16.0 introduces a redesigned async I/O system based on the std.Io interface. Unlike the old async/await (removed in 0.11), the new design decouples concurrency expression from execution models, allowing code to work optimally across synchronous, multi-threaded, and event-driven contexts.
Critical Concept: Asynchrony ≠ Concurrency
async: Operations can proceed out-of-order (sequential awaiting is valid)concurrent: Operations must proceed simultaneously (requires parallelism)
Table of Contents
Bundled Resources
References
Fundamentals:
references/async-overview.md- New async I/O design philosophyreferences/io-interface.md- std.Io interface and primitivesreferences/async-vs-concurrent.md- Critical distinction explained
Patterns:
references/future-handling.md- Future.await() and Future.cancel()references/resource-management.md- Defer patterns for async resourcesreferences/io-implementations.md- Blocking, ThreadPool, EventLoop, Stackless
Advanced:
references/message-passing.md- Io.Queue for synchronizationreferences/vectorized-io.md- sendFile() and drain() operationsreferences/migration-guide.md- From old async or sync code
Examples
Complete async I/O demonstrations:
examples/basic_async.zig- Simple async operations with io.async()examples/concurrent_tasks.zig- True concurrency with io.concurrent()examples/file_operations.zig- Async file I/O patternsexamples/http_server.zig- Async HTTP server with event loopexamples/producer_consumer.zig- Message passing with Io.Queueexamples/cancellation.zig- Proper task cancellation patterns
Templates
Starting points for async code:
assets/templates/async-function.zig- Async function templateassets/templates/async-server.zig- Async server templateassets/templates/async-client.zig- Async client templateassets/templates/threaded-io.zig- Thread pool I/O setup
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 258 lines · 72 tokens per session scan A f924d70a18d7
zig-async-io is a skill published in the GitHub repository whit3rabbit/claude-zig-skill (23 stars, last pushed 8mo ago), licensed MIT. It adds 72 tokens to every session and 2,006 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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