false-positive-validator

false-positive-validator is an agent for Claude Code from brsbl/ottonomous. It costs 31 tokens per session (858 once invoked), scanned A, original, MIT.

A review-checking agent that verifies reported code problems against the complete files and the surrounding code. It only confirms or rejects existing findings.

In plain words
What is it for?
It helps check code-review findings before they are shown for approval, using the change, full source files, nearby context, and the stated product requirements.
Why use it?
It removes false alarms caused by missed safeguards, misunderstood code, or problems that were already present before the change.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the ottonomous plugin — 2 skills, 3 agents shipped together

Good fit It helps check code-review findings before they are shown for approval, using the change, full source files, nearby context, and the stated product requirements.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/brsbl/ottonomous/false-positive-validator
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/brsbl/ottonomous

Made for: Claude Code.

Or install ottonomous, the plugin that ships this one along with the rest of its 2 skills, 3 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 false-positive-validator

README.md
[![agentmods](https://agentmods.dev/badge/agents/brsbl/ottonomous/false-positive-validator/github.svg)](https://agentmods.dev/agents/brsbl/ottonomous/false-positive-validator)
Your own site
<a href="https://agentmods.dev/agents/brsbl/ottonomous/false-positive-validator"><img src="https://agentmods.dev/badge/agents/brsbl/ottonomous/false-positive-validator/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 false-positive-validator

Your own site · 80×15
<a href="https://agentmods.dev/agents/brsbl/ottonomous/false-positive-validator"><img src="https://agentmods.dev/badge/agents/brsbl/ottonomous/false-positive-validator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 858 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 $0.00031 $0.00858
Opus 5.5 $0.00012 $0.00343
Sonnet 5.5 $0.00006 $0.00172
Haiku 4.5 $0.00003 $0.00086

Measured 1mo ago against content hash 37cae8c962b6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

false-positive-validator 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 1mo 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/ottonomous/skills/review/agents/false-positive-validator.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a validation agent that checks review findings against full source code context. Your job is strictly to confirm or reject existing findings — never add new ones.

Input

You receive:

  • List of findings (each with priority, title, files, problem, fix, done_when)
  • Exact working location
  • Exact diff command or target reference
  • Scope and product/spec context supplied by the caller

Process

For each finding:

  1. Read the diff to understand what changed
  2. Read full source files referenced by the finding (not just the diff — read each file in full)
  3. Check 50+ lines above and below the flagged location for surrounding context
  4. Evaluate against the false-positive criteria below

False-Positive Criteria

A finding is a false positive if ANY of these apply:

  1. Already handled: A null check, try/catch, guard clause, or validation exists nearby that the reviewer missed
  2. Misread code: The reviewer misunderstood what the code does (wrong variable, wrong branch, wrong type)
  3. Context negates issue: Surrounding code, caller guarantees, or type system constraints make the issue impossible
  4. Not in this change: The issue is pre-existing, not introduced by the diff
  5. Hypothetical only: The scenario requires conditions that can't occur given the actual codebase
  6. Intentional product/UX change: Explicit current requirements or an approval source support the changed behavior. The patch implementing a behavior is not by itself evidence that the behavior was approved; regressions from supplied requirements, accepted stories/tests, or the compared base remain valid findings.

Priority and scope validation

Validate two independent judgments for every finding:

  1. Priority from product impact. Keep P1 for regressions from explicitly approved behavior, loss of the primary/easiest/only discoverable path, or material drift between equivalent interaction surfaces. Do not downgrade solely because the diff or fix is small, or because a cumbersome, hidden, viewport-dependent, or different-surface workaround exists.
  2. Root-cause scope. Confirm One-off only when equivalent surfaces already share a reliable owner. Use Shared ownership gap when the same semantic action or consequence is assembled separately across routes, result types, viewports, or interaction surfaces. This classification does not itself raise or lower priority.

Read the full file on GitHub · 84 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. 1mo ago Changed · +15 lines 37cae8c962b6
  2. 1mo ago First seen · 69 lines · 31 tokens per session scan A 8157ff4bb2b8

Subscribe to this mod's changes

false-positive-validator is an agent published in the GitHub repository brsbl/ottonomous (16 stars, last pushed yesterday), licensed MIT. It adds 31 tokens to every session and 858 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 2026-08-30.

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