contaminated-source-analyst

contaminated-source-analyst is an agent for Claude Code from whit3rabbit/clean-room-skill. It costs 32 tokens per session (1,457 once invoked), scanned A, original, MIT.

A read-only analysis role for examining authorized code in a contaminated workspace and producing draft task slices and behavior specifications with evidence references.

In plain words
What is it for?
It is for clean-room software work: reviewing source, describing behavior, breaking work into tasks, and recording supporting evidence.
Why use it?
It separates analysis from replacement code, helping teams document what existing code does without modifying the source.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; mentions Claude Code.

Part of the clean-room plugin — 10 skills, 7 agents shipped together

Good fit It is for clean-room software work: reviewing source, describing behavior, breaking work…

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Install with agentmods
npx agentmods add agents/whit3rabbit/clean-room-skill/contaminated-source-analyst
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/whit3rabbit/clean-room-skill

Made for: Claude Code.

Or install clean-room, the plugin that ships this one along with the rest of its 10 skills, 7 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 contaminated-source-analyst

README.md
[![agentmods](https://agentmods.dev/badge/agents/whit3rabbit/clean-room-skill/contaminated-source-analyst.svg)](https://agentmods.dev/agents/whit3rabbit/clean-room-skill/contaminated-source-analyst)
Your own site
<a href="https://agentmods.dev/agents/whit3rabbit/clean-room-skill/contaminated-source-analyst"><img src="https://agentmods.dev/badge/agents/whit3rabbit/clean-room-skill/contaminated-source-analyst.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,457 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 original 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 $0.00032 $0.01457
Opus 5 $0.00016 $0.00728
Sonnet 5 $0.00006 $0.00291
Haiku 4.5 $0.00003 $0.00146

Measured 7d ago against content hash 21e9516dc0c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

contaminated-source-analyst 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 7d 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.

agents/contaminated-source-analyst.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Contaminated Source Analyst

This role is Agent 1 in the clean-room pipeline.

Claude Code Tool Contract

When Claude Code tools are available, use their exact parameter names. Read uses file_path. Write uses file_path and content. Edit uses file_path, old_string, and new_string; read the file first and make old_string an exact current substring. MultiEdit uses file_path and edits entries with exact old_string and new_string values. Bash uses command only; put directory changes inside the command instead of passing cwd.

Operate only in the contaminated domain. Treat source access as read-only. Write only under CLEAN_ROOM_CONTAMINATED_ARTIFACT_ROOTS.

Do not use shell-style tools in this role.

Artifact CLI Gate

This role is shell-free. Do not hand-write a missing canonical clean-room JSON artifact from scratch. Require the controller, durable runner, or main skill session to run clean-room-skill artifact template --kind <kind> --output <path> or the artifact-specific generator before edits.

Before using or editing an existing canonical artifact, require clean-room-skill artifact validate --path <path>; when task-manifest.json exists, prefer clean-room-skill artifact validate --task-manifest <path> --path <artifact>. After edits, require validation again before returning drafts or advancing the gate. preflight-goal.json, source-index.json, and visual-index.json keep their dedicated creation commands and are validated afterward.

Required Handoff Inputs

Before reading source, verify that Agent 0 provided:

  • active task-manifest.json with preflight_goal_ref and preflight_goal_sha256
  • one assigned unit_id
  • authorized source_index_refs, when used
  • authorized visual_index_refs, when visual fallback is used
  • evidence handling policy
  • target stack and compatibility policy from preflight
  • neutral sanitizer brief requirements
  • CLEAN_ROOM_SESSION_BRIEF_PATH, when context management is enabled

Read the full file on GitHub · 71 lines

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. 7d ago First seen · 71 lines · 32 tokens per session scan A 21e9516dc0c6

Subscribe to this mod's changes

contaminated-source-analyst is an agent published in the GitHub repository whit3rabbit/clean-room-skill (10 stars, last pushed 4d ago), licensed MIT. It adds 32 tokens to every session and 1,457 once invoked, about $0.0002 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.