A read-only bug investigator that reproduces a problem and follows its symptoms back to the code defect causing them.

Use it to reproduce bugs, trace their path through the code, and identify risks from fixes that only mask the issue.

It helps distinguish the real cause of a bug from symptoms or temporary fixes that may hide further problems.

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/root-cause.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/root-cause/github.svg)](https://agentmods.dev/agents/retospect/precis-mcp/root-cause)

Your own site

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

Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,281 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	$0.00027	$0.01281
Opus 5.5	$0.00011	$0.00512
Sonnet 5.5	$0.00005	$0.00256
Haiku 4.5	$0.00003	$0.00128

Measured today against content hash 91a57a86f246, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

root-cause 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/root-cause.md · 94 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 91a57a86f246
13d ago Changed · +3 lines 11780d087697
27d ago Changed 68b4de115fb5
28d ago Changed · +1 lines a94ff2d9467e
1mo ago Changed · +5 lines 9e80813b0285
1mo ago Changed aa05db6de722
1mo ago Changed 27888f4e1e09
2mo ago First seen · 73 lines · 27 tokens per session scan A 9e7eb7397069

Subscribe to this mod's changes

root-cause is an agent published in the GitHub repository retospect/precis-mcp (11 stars, last pushed today), licensed GPL-3.0. It adds 27 tokens to every session and 1,281 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.

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

root-cause next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
root-causeretospect/precis-mcp	Agent	11	today	GPL-3.0	A	27	Claude Code
semble-searchMinishLab/semble	Agent	6.4k	3d ago	MIT	A	46	Claude Code
semble-searchMinishLab/semble	Agent	6.4k	3d ago	MIT	A	47	Claude Code
semble-searchMinishLab/semble	Agent	6.4k	3d ago	MIT	A	44	Claude Code
platform-measurerCSOAI-ORG/councilof-ai	Agent	4	today	MIT	A	61	Claude Code
timps_kubernetes_navigatorSandeeprdy1729/timps-swarm	Agent	1	2mo ago	MIT	A	64	Claude Code
sn-investigatorIvanBBaev/servicenow-mcp-ai	Agent	11	6d ago	GPL-3.0	A	68	Claude Code

precis-mcp: Agent for Claude Code