A test-writing agent that creates tests from a caller’s specification, such as an expected behavior description or a reproducible bug report.

Use it to add tests for a function’s contract or to reproduce and guard against a reported problem.

It reduces the work of turning requirements and bug reports into executable checks, and confirms that the tests run.

How retospect/precis-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to retospect/precis-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/retospect/precis-mcp/main/.claude/agents/test-author.md

Clone the repo

git clone --depth 1 https://github.com/retospect/precis-mcp

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/retospect/precis-mcp/test-author/github.svg)](https://agentmods.dev/agents/retospect/precis-mcp/test-author)

Your own site

<a href="https://agentmods.dev/agents/retospect/precis-mcp/test-author"><img src="https://agentmods.dev/badge/agents/retospect/precis-mcp/test-author/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/retospect/precis-mcp/test-author"><img src="https://agentmods.dev/badge/agents/retospect/precis-mcp/test-author.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 911 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.

Model	Per session	Once invoked
Fable 5.1	$0.00024	$0.00911
Opus 5.5	$0.00010	$0.00364
Sonnet 5.5	$0.00005	$0.00182
Haiku 4.5	$0.00002	$0.00091

Measured today against content hash d01d34c6a33d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-author 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 today.

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-author.md · 60 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-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.

today Changed · +12 lines d01d34c6a33d
13d ago Changed · +3 lines 6c3d790d0110
28d ago Changed · +1 tokens per session c85974c8231f
1mo ago Changed f0137dfe15c5
1mo ago Changed 0453022ce897
2mo ago First seen · 45 lines · 23 tokens per session scan A 5af0462a3ea1

Subscribe to this mod's changes

test-author is an agent published in the GitHub repository retospect/precis-mcp (11 stars, last pushed today), licensed GPL-3.0. It adds 24 tokens to every session and 911 once invoked, about $0.0001 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 2026-08-31.

LLM Python Testing ai-agent mcp mcp-server model-context-protocol

test-author next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
test-authorretospect/precis-mcp	Agent	11	today	GPL-3.0	A	24	Claude Code
researcherdinglebear-ai/axon	Agent	4	14d ago	AGPL-3.0	A	82	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	yesterday	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	4d ago	MIT	A	33	Claude Code
code-revieweranthropics/claude-cookbooks	Agent	54k	2d ago	MIT	A	52	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	61	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	11	Claude Code

precis-mcp: Agent for Claude Code