test-matrix-keeper

test-matrix-keeper is an agent for Claude Code from iLearn-Lab/EvoHarness. It costs 11 tokens per session (98 once invoked), scanned A, original, no licence file.

A review and expansion of the verification matrix for an agent harness. A verification matrix is a list of situations and checks used to confirm that a growing system still works.

In plain words
What is it for?
Use it to plan, inspect, and maintain coverage for the harness as its feature set grows.
Why use it?
It helps prevent new commands, skills, agents, or integrations from expanding the system without adequate tests.

Agent for Claude Code

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 agents/ilearn-lab/evoharness/test-matrix-keeper
Clone the repo
git clone --depth 1 https://github.com/iLearn-Lab/EvoHarness

Made for: Claude Code.

Wrote 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.

agentmods badge for test-matrix-keeper

README.md
[![agentmods](https://agentmods.dev/badge/agents/ilearn-lab/evoharness/test-matrix-keeper.svg)](https://agentmods.dev/agents/ilearn-lab/evoharness/test-matrix-keeper)
Your own site
<a href="https://agentmods.dev/agents/ilearn-lab/evoharness/test-matrix-keeper"><img src="https://agentmods.dev/badge/agents/ilearn-lab/evoharness/test-matrix-keeper.svg" alt="Measured on agentmods" height="20"></a>
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 98 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00011 $0.00098
Opus 5 $0.00005 $0.00049
Sonnet 5 $0.00002 $0.00020
Haiku 4.5 $0.00001 $0.00010

Measured 4d ago against content hash c8e4f258c048, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-matrix-keeper 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 4d 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.

.claude/agents/test-matrix-keeper.md · 14 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 4d ago First seen · 14 lines · 11 tokens per session scan A c8e4f258c048

Subscribe to this mod's changes

test-matrix-keeper is an agent published in the GitHub repository iLearn-Lab/EvoHarness (59 stars, last pushed 2mo ago), with no licence file. It adds 11 tokens to every session and 98 once invoked, about $0.0001 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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