Borrowing it
Nothing to install: this file belongs to evmts/tevm. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/evmts/tevm/main/.claude/commands/integrate-test-matcher.mdgit clone --depth 1 https://github.com/evmts/tevmWrote 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/commands/evmts/tevm/integrate-test-matcher)<a href="https://agentmods.dev/commands/evmts/tevm/integrate-test-matcher"><img src="https://agentmods.dev/badge/commands/evmts/tevm/integrate-test-matcher/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/commands/evmts/tevm/integrate-test-matcher"><img src="https://agentmods.dev/badge/commands/evmts/tevm/integrate-test-matcher.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00000 | $0.02102 |
| Opus 5.5 | $0.00000 | $0.00841 |
| Sonnet 5.5 | $0.00000 | $0.00420 |
| Haiku 4.5 | $0.00000 | $0.00210 |
Grade A, and why
integrate-test-matcher 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 1mo 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 — 222 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Command: Integrate Test Matcher
This command initiates an interactive workflow to integrate a new or existing test matcher from @tevm/test-matchers into the @tevm/actions package's test suite.
Usage
To start the integration process, type:
/integrate-test-matcher
The Workflow
This command operates in three stages.
Stage 1: Discover and Select
First, I will analyze the @tevm/test-matchers package to identify all available matchers and their capabilities. I will then present you with a list.
AI Action:
- Read the directory structure of
extensions/test-matchers/src/matchers/. - For each category, parse the
index.tsfile to find exported matchers. - Read the JSDoc comments for each matcher to create a summary.
- Present the list of matchers to the user.
(Example Interaction)
AI presents the list:
Here are the available matchers from
@tevm/test-matchers:
- Value Matchers:
toBeAddress(opts?): Asserts a value is a valid Ethereum address.toBeHex(opts?): Asserts a value is a valid hex string.toEqualAddress(expected): Compares two addresses for case-insensitive equality.toEqualHex(expected, opts?): Compares two hex strings with normalization.- Event Matchers:
toEmit(contract, eventName): Asserts an event was emitted.
- Chainable with:
.withEventArgs(...),.withEventNamedArgs(...)- Error Matchers:
toBeReverted(client?): Asserts a transaction reverted for any reason.toBeRevertedWithString(client, message): Asserts a revert with a specific string message.toBeRevertedWithError(client, contract, errorName): Asserts a revert with a specific custom error.
- Chainable with:
.withErrorArgs(...),.withErrorNamedArgs(...)Please specify which matcher (and its chainable companions) you would like to integrate into the
@tevm/actionstest files.
User responds, e.g., "Please integrate toBeRevertedWithError and withErrorNamedArgs."
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.
- 1mo ago First seen · 222 lines · 0 tokens per session scan A 4191d550bb0c
integrate-test-matcher is a command published in the GitHub repository evmts/tevm (449 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,102 tokens. 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 2026-08-31.
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