evidence-hygiene

evidence-hygiene is a skill for Claude Code, Codex from adriannoes/awesome-agentic-ai. It costs 190 tokens per session (4,319 once invoked), scanned A, a copy of evidence-hygiene, MIT.

A guide for safely preparing screenshots, network captures, and proof-of-concept material for bug-bounty reports.

In plain words
What is it for?
It is for redacting credentials and personal data from screenshots, HAR files, HTTP requests, and terminal output while keeping the evidence useful to reviewers.
Why use it?
It helps prevent session cookies, access tokens, and other users’ personal information from being disclosed in evidence.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit It is for redacting credentials and personal data from screenshots, HAR files, HTTP requests, and terminal output while keeping the evidence useful to reviewers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/adriannoes/awesome-agentic-ai/evidence-hygiene
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.

Any agent
npx skills add adriannoes/awesome-agentic-ai --skill evidence-hygiene
Clone the repo
git clone --depth 1 https://github.com/adriannoes/awesome-agentic-ai

Made for: Claude Code, Codex.

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-hygiene

README.md
[![agentmods](https://agentmods.dev/badge/skills/adriannoes/awesome-agentic-ai/evidence-hygiene/github.svg)](https://agentmods.dev/skills/adriannoes/awesome-agentic-ai/evidence-hygiene)
Your own site
<a href="https://agentmods.dev/skills/adriannoes/awesome-agentic-ai/evidence-hygiene"><img src="https://agentmods.dev/badge/skills/adriannoes/awesome-agentic-ai/evidence-hygiene/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-hygiene

Your own site · 80×15
<a href="https://agentmods.dev/skills/adriannoes/awesome-agentic-ai/evidence-hygiene"><img src="https://agentmods.dev/badge/skills/adriannoes/awesome-agentic-ai/evidence-hygiene.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 190 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,319 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 97% 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 $0.00190 $0.04319
Opus 5 $0.00095 $0.02159
Sonnet 5 $0.00038 $0.00864
Haiku 4.5 $0.00019 $0.00432

Measured 8d ago against content hash 03beb1e888f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

evidence-hygiene 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 8d 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

97% identical to evidence-hygiene — 1 line 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.

cursor-claude-codex/skills/bug-hunter/skills/evidence-hygiene/SKILL.md · 376 lines

How it starts

The opening of the file, as written. The whole thing — 376 lines — stays where its author put it; the contents beside it link to each section on GitHub.

EVIDENCE HYGIENE — PoC Capture & Redaction Discipline

Use this skill BEFORE capturing any screenshot, exporting any HAR, or attaching any evidence to a bug-bounty submission. It catches the most common evidence-hygiene mistakes that cause cookies to leak, PII to be shared without consent, or screenshots to be unsuitable for triage.

The core principle: Bug-bounty evidence is meant to convince a triager. Anything beyond that — live cookies, real-user PII, internal trace IDs that aren't useful — should not be in the evidence.


1. Two Categories of Sensitive Data

Every PoC artifact (screenshot, HAR, raw HTTP request, terminal transcript) potentially contains data that needs different treatment.

Category Examples Treatment
Your-account secrets Session cookies, OAuth tokens, refresh tokens, API keys Always redact. Even in private bug-bounty platform attachments. Your account, your session — protect it.
Other users' PII Real names, emails, phone numbers, addresses, profile photos, account IDs Redact unless explicitly demonstrating cross-account impact. Even then, mask faces and minimize the data you display.
Triager-useful metadata Trace IDs (x-datadog-trace-id), request IDs, server timestamps, your test account UID/email, GraphQL operation names, response shapes Leave visible — these help the triager correlate to logs and reproduce.
Test-account passwords (limited use) Throwaway passwords on a test account (e.g., Testing@5678) Acceptable in screenshots if you rotate immediately after submission so the value shown is dead. Don't leave real-use passwords in evidence.

2.1 What must be masked

The session cookie value is the highest-value secret in any PoC. Mask:

  • The session cookie (authn, session, sid, __Secure-id, etc. — name varies per target)
  • csrf-token if it's bound to your session
  • Authorization headers (Bearer tokens, JWT)
  • Cookie request header values for any session-bearing cookie
  • Set-Cookie response header values for any session-bearing cookie

Read the full file on GitHub · 376 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. 8d ago First seen · 376 lines · 190 tokens per session scan A 03beb1e888f8

Subscribe to this mod's changes

evidence-hygiene is a skill published in the GitHub repository adriannoes/awesome-agentic-ai (57 stars, last pushed 14d ago), licensed MIT. It adds 190 tokens to every session and 4,319 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 0 findings. It is 97% identical to evidence-hygiene, differing in 1 line, and is treated as a copy.

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