grid-tester

grid-tester is an agent for Claude Code from evolution-foundation/evo-nexus. It costs 166 tokens per session (1,454 once invoked), scanned A, original, no licence file.

A coding agent for planning and writing tests, including TDD, where tests are written before production code, plus integration and end-to-end testing.

In plain words
What is it for?
Use it to create test strategies, write tests for changes, add integration or end-to-end coverage, and harden flaky tests.
Why use it?
It helps define expected behavior first, improve test coverage, and investigate tests that fail inconsistently.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it to create test strategies, write tests for changes, add integration or end-to-end coverage, and harden flaky tests.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/evolution-foundation/evo-nexus/grid-tester
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.

Clone the repo
git clone --depth 1 https://github.com/evolution-foundation/evo-nexus

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 grid-tester

README.md
[![agentmods](https://agentmods.dev/badge/agents/evolution-foundation/evo-nexus/grid-tester/github.svg)](https://agentmods.dev/agents/evolution-foundation/evo-nexus/grid-tester)
Your own site
<a href="https://agentmods.dev/agents/evolution-foundation/evo-nexus/grid-tester"><img src="https://agentmods.dev/badge/agents/evolution-foundation/evo-nexus/grid-tester/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.

agentmods 80×15 button for grid-tester

Your own site · 80×15
<a href="https://agentmods.dev/agents/evolution-foundation/evo-nexus/grid-tester"><img src="https://agentmods.dev/badge/agents/evolution-foundation/evo-nexus/grid-tester.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 166 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,454 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00166 $0.01454
Opus 5.5 $0.00066 $0.00582
Sonnet 5.5 $0.00033 $0.00291
Haiku 4.5 $0.00017 $0.00145

Measured 1mo ago against content hash e4c6e11ea9dd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

grid-tester 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.

.claude/agents/grid-tester.md · 138 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 1mo ago First seen · 138 lines · 166 tokens per session scan A e4c6e11ea9dd

Subscribe to this mod's changes

grid-tester is an agent published in the GitHub repository evolution-foundation/evo-nexus (548 stars, last pushed 5mo ago), with no licence file. It adds 166 tokens to every session and 1,454 once invoked, about $0.0007 per session on Opus 5.5. 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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