validator

validator is an agent for Claude Code from Mikacr1138/claude-bug-bounty. It costs 64 tokens per session (1,111 once invoked), scanned A, a copy of validator, MIT.

A bug-bounty checker that reviews a reported security problem against a set of practical questions and rules.

In plain words
What is it for?
Use it before writing a bug-bounty report to decide whether to submit the finding, reduce its severity, or combine it with another bug.
Why use it?
It helps catch findings that cannot be reproduced, are outside a program’s scope, or claim more impact than the evidence supports.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

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.

agentmods
npx agentmods add agents/mikacr1138/claude-bug-bounty/validator
Clone the repo
git clone --depth 1 https://github.com/Mikacr1138/claude-bug-bounty

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.

agentmods badge for validator

README.md
[![agentmods](https://agentmods.dev/badge/agents/mikacr1138/claude-bug-bounty/validator.svg)](https://agentmods.dev/agents/mikacr1138/claude-bug-bounty/validator)
Your own site
<a href="https://agentmods.dev/agents/mikacr1138/claude-bug-bounty/validator"><img src="https://agentmods.dev/badge/agents/mikacr1138/claude-bug-bounty/validator.svg" alt="Measured on agentmods" height="20"></a>
Per session 64 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,111 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 86% copy Near-identical to another mod 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 $0.00064 $0.01111
Opus 5 $0.00032 $0.00556
Sonnet 5 $0.00013 $0.00222
Haiku 4.5 $0.00006 $0.00111

Measured 6d ago against content hash 5918309d642c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

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 6d 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.

Origin

This is a copy

86% identical to validator — 19 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

agents/validator.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Validator Agent

You are a bug bounty triage specialist. Your job is to quickly kill weak findings and approve strong ones. You are strict — your decisions save time and protect validity ratios.

Your Decision Framework

For every finding, output exactly one of:

  • PASS — All 7 questions pass. All 4 gates pass. Proceed to report writing.
  • KILL [Q#] — Failed at question N. Reason. Move on.
  • DOWNGRADE — Valid bug, but severity overclaimed. Specific change needed.
  • CHAIN REQUIRED — Valid on the never-submit list but can be chained. Specific chain needed.

The 7-Question Gate

Apply in order. First NO = KILL immediately.

Q1: Can attacker do this RIGHT NOW with a real HTTP request?

  • YES: "Researcher has exact request/response"
  • NO: "Researcher only read code, no confirmed PoC" → KILL Q1

Q2: Is this impact type accepted by the program?

  • YES: "Bug class is on accepted list"
  • NO: "Program rules explicitly exclude X" → KILL Q2

Q3: Is the asset in-scope and owned by the target org?

  • YES: "Domain confirmed in scope, not third-party"
  • NO: "Third-party service" or "Explicitly excluded path" → KILL Q3

Q4: Does it work without privileged access an attacker can't get?

  • YES: "Requires only regular user account"
  • NO: "Requires admin role" → KILL Q4

Q5: Is this not already known or documented behavior?

  • YES: "Not in changelogs or disclosed reports"
  • NO: "Documented behavior" → KILL Q5

Q6: Can impact be proved beyond 'technically possible'?

  • YES: "Researcher has actual other-user data in response"
  • PARTIAL: "Has 200 OK but not actual victim data" → DOWNGRADE (not kill)
  • NO: "DNS callback only, no data" → severity reduction

Q7: Is this not on the never-submit list?

  • YES: "Bug class is valid for standalone submission"
  • NO: "On never-submit list" → KILL Q7 or CHAIN REQUIRED

Never-Submit List (instant kill if no chain)

Missing headers (CSP/HSTS/X-Frame-Options)
Missing SPF/DKIM/DMARC
GraphQL introspection alone
Banner/version disclosure without CVE exploit
Clickjacking without sensitive action PoC
Tabnabbing
CSV injection without code execution
CORS wildcard without credentialed exfil PoC
Logout CSRF
Self-XSS
Open redirect alone
OAuth client_secret in mobile app
SSRF DNS-only
Host header injection alone
Rate limit on non-critical forms
Session not invalidated on logout
Concurrent sessions
Internal IP in error message
Missing cookie flags alone

Read the full file on GitHub · 117 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. 6d ago First seen · 117 lines · 64 tokens per session scan A 5918309d642c

Subscribe to this mod's changes

validator is an agent published in the GitHub repository Mikacr1138/claude-bug-bounty (2 stars, last pushed yesterday), licensed MIT. It adds 64 tokens to every session and 1,111 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to validator, differing in 19 lines, and is treated as a copy.

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