test-investigation-agent

test-investigation-agent is an agent for coding agents from ReviewToolkits/code-review-toolkit. It costs 250 tokens per session (2,490 once invoked), scanned A, original, no licence file.

A test-based bug investigator that treats tests as statements of how the software should behave, then checks those expectations in code and similar code paths.

In plain words
What is it for?
It helps review tests, identify their expected rules, trace those rules through the code, and look for matching bugs in related functions.
Why use it?
It helps find defects that ordinary test runs may miss, especially in untested paths and functions that work in similar ways.

Agent

Part of the code-review-toolkit plugin — 8 commands, 18 agents shipped together

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/reviewtoolkits/code-review-toolkit/test-investigation-agent
Clone the repo
git clone --depth 1 https://github.com/ReviewToolkits/code-review-toolkit

Or install code-review-toolkit, the plugin that ships this one along with the rest of its 8 commands, 18 agents.

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-investigation-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/reviewtoolkits/code-review-toolkit/test-investigation-agent.svg)](https://agentmods.dev/agents/reviewtoolkits/code-review-toolkit/test-investigation-agent)
Your own site
<a href="https://agentmods.dev/agents/reviewtoolkits/code-review-toolkit/test-investigation-agent"><img src="https://agentmods.dev/badge/agents/reviewtoolkits/code-review-toolkit/test-investigation-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 250 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,490 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 $0.00250 $0.02490
Opus 5 $0.00125 $0.01245
Sonnet 5 $0.00050 $0.00498
Haiku 4.5 $0.00025 $0.00249

Measured 5d ago against content hash 3630f99274ae, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-investigation-agent 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 5d 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.

plugins/code-review-toolkit/agents/test-investigation-agent.md · 187 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. 5d ago First seen · 187 lines · 250 tokens per session scan A 3630f99274ae

Subscribe to this mod's changes

test-investigation-agent is an agent published in the GitHub repository ReviewToolkits/code-review-toolkit (6 stars, last pushed 1mo ago), with no licence file. It adds 250 tokens to every session and 2,490 once invoked, about $0.0013 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 2026-08-31.