Duplicate Check

by H-mmer

Duplicate Check is a Quality skill for Claude Code, published by H-mmer in pentest-agents.

804 stars156 forkson H-mmer/pentest-agentsAdded 2026/08/22Repository updated 2026/06/12

View source on GitHub Download repo ZIP

agentsbug-bountybugcrowdclaude-codehackeronemcppentestingsecurity-tools

Install in seconds

Install Duplicate Check

Copy Duplicate Check into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/H-mmer/pentest-agents/tree/main/.claude/skills/dupcheck ~/.claude/skills/dupcheck

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/H-mmer/pentest-agents.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: .claude/skills/dupcheck/SKILL.md in H-mmer/pentest-agents
Installs to: ~/.claude/skills/dupcheck
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What Duplicate Check does

Duplicate Check searches platform hacktivity and local findings to see whether a vulnerability has already been reported. Use it before writing up a finding to judge duplicate risk and related prior art.

Duplicate Check is cataloged under Quality on DirSkills. Duplicate Check comes from a repository tagged agents, bug-bounty, bugcrowd, claude-code and hackerone.

Documentation

README

Excerpt

Check for duplicate reports: $ARGUMENTS

Determine the platform and program from scope.yaml in the current directory.
Use bounty-platforms MCP tool search_hacktivity with platform, program, and "$ARGUMENTS" as the query.
Also search local findings: uv run python3 $CLAUDE_PROJECT_DIR/tools/dedup_findings.py --stats --db findings.json
Read hacktivity.md if it exists and grep for related terms.
Report:
- Exact or near matches from hacktivity (potential duplicates)
- Related reports that might overlap
- If the area appears heavily reported (high duplicate risk)
- Verdict: likely unique, possible duplicate, or high duplicate risk

Writeup Cross-Reference (if writeup-search MCP is available)

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Duplicate Check

What else does H-mmer publish alongside Duplicate Check?
Duplicate Check is one of 25 skills that DirSkills catalogs from H-mmer/pentest-agents, the repository it ships in. Its siblings there include Analyze, Autopilot and Brain. Each one is a separate skill with its own page in this directory, installs the same way Duplicate Check does, and is maintained by H-mmer in that same repository. The rest of the collection is listed on the H-mmer/pentest-agents page.
How does Duplicate Check compare to other Quality skills?
Duplicate Check ranks #957 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Duplicate Check against them. Open each page to compare what they document and how they install.