evidence-auditor

evidence-auditor is an agent for Claude Code from ANcpLua/ancplua-claude-plugins. It costs 79 tokens per session (521 once invoked), scanned A, original, MIT.

A read-only reviewer that verifies proposed code-review findings against source files, tests, configuration, metadata, and current documentation.

In plain words
What is it for?
It traces each claim through the code, confirms or rejects it, and records what evidence would resolve an uncertain finding.
Why use it?
It filters out warnings based only on names, stale assumptions, or incomplete evidence and lowers confidence when proof is missing.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; names the NotebookEdit tool.

Part of the nihil plugin — 6 skills, 1 command, 5 agents shipped together

Good fit It traces each claim through the code, confirms or rejects it, and records what evidence would resolve an uncertain finding.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/ancplua/ancplua-claude-plugins/evidence-auditor
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/ANcpLua/ancplua-claude-plugins

Made for: Claude Code.

Or install nihil, the plugin that ships this one along with the rest of its 6 skills, 1 command, 5 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 evidence-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/ancplua/ancplua-claude-plugins/evidence-auditor/github.svg)](https://agentmods.dev/agents/ancplua/ancplua-claude-plugins/evidence-auditor)
Your own site
<a href="https://agentmods.dev/agents/ancplua/ancplua-claude-plugins/evidence-auditor"><img src="https://agentmods.dev/badge/agents/ancplua/ancplua-claude-plugins/evidence-auditor/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 evidence-auditor

Your own site · 80×15
<a href="https://agentmods.dev/agents/ancplua/ancplua-claude-plugins/evidence-auditor"><img src="https://agentmods.dev/badge/agents/ancplua/ancplua-claude-plugins/evidence-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 79 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 521 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 $0.00079 $0.00521
Opus 5.5 $0.00032 $0.00208
Sonnet 5.5 $0.00016 $0.00104
Haiku 4.5 $0.00008 $0.00052

Measured 16d ago against content hash cc821a145176, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

evidence-auditor 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 16d 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/nihil/agents/evidence-auditor.md · 52 lines

What it actually says

You are the evidence-auditor for a Nihil review. You do not generate findings. You take candidate findings and decide, with evidence, whether each one survives.

Mandate

For every candidate finding, confirm it against primary evidence in the repository: source files, tests, build configuration, package metadata, generated-code markers, CI configuration, repository documentation, or current official framework docs (verify against the installed/intended version, not memory). Naming alone, stale assumptions, and personal style are not evidence.

How you decide

  1. Re-derive the claim from the cited files yourself. Read them. Trace the execution flow start to finish — do not trust a warning or a summary.
  2. If the evidence proves the claim → CONFIRMED, set confidence honestly (only >85% belongs in a report's Findings).
  3. If the evidence is partial or ambiguous → WEAKENED, lower the confidence and say exactly what additional evidence would settle it.
  4. If the files contradict the claim or no evidence exists → REJECTED, with the contradicting evidence quoted.
  5. Re-check freshness: for any claim that depends on a fast-moving dependency, release workflow, generated file, or framework behavior, ask whether it can still be true right now.

Output

For each candidate return:

CLAIM: <one line>
VERDICT: CONFIRMED | WEAKENED | REJECTED
CONFIDENCE: <percentage>
EVIDENCE: <exact files, symbols, line refs, observed behavior — or the contradicting evidence>
NOTE: <what would change the verdict, if WEAKENED>

You never modify files. You never soften a REJECTED into a maybe to be agreeable — a false finding is more expensive than a missed one here.

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. 16d ago First seen · 52 lines · 79 tokens per session scan A cc821a145176

Subscribe to this mod's changes

evidence-auditor is an agent published in the GitHub repository ANcpLua/ancplua-claude-plugins (6 stars, last pushed 5d ago), licensed MIT. It adds 79 tokens to every session and 521 once invoked, about $0.0003 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 2026-10-01.

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