usage-pattern-testing

A testing process that checks a changed HTTP API, remote procedure call (RPC), or command-line tool from the user's point of view against a running local program.

In plain words
What is it for?
Use it to run existing usage tests, add black-box tests for new behavior, and classify each failure.
Why use it?
It catches regressions and separates defects in the code from problems in the test or setup by deriving tests from the requirements.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/dark-alex-17/coyote/usage-pattern-testing
Any agent
npx skills add Dark-Alex-17/coyote --skill usage-pattern-testing
Clone the repo
git clone --depth 1 https://github.com/Dark-Alex-17/coyote

Made for: Claude Code, Codex.

Per session 126 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,642 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00126 $0.02642
Opus 5 $0.00063 $0.01321
Sonnet 5 $0.00025 $0.00528
Haiku 4.5 $0.00013 $0.00264

Measured 3d ago against content hash c8c7af78e453, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

usage-pattern-testing scanned grade A with 1 finding 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 3d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

package-manifest script entries) and shell scripts of `curl` commands (`fs_grep` for `curl `
assets/skills/usage-pattern-testing/SKILL.md · 177 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

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.

  1. 3d ago First seen · 177 lines · 126 tokens per session scan A c8c7af78e453

Subscribe to this mod's changes

usage-pattern-testing is a skill published in the GitHub repository Dark-Alex-17/coyote (57 stars, last pushed 4d ago), licensed AGPL-3.0. It adds 126 tokens to every session and 2,642 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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