Ext Ops Panel
Open dashboard

challenger

Challenges claims, decisions, and documents through structured dialectical analysis.

Plugin bundle · by Eran Shir

About

challenger is a plugin bundle for AI coding tools published by Eran Shir. Marketplaces we read that list it: 1 (Community GitHub marketplaces). We first saw it on 2026-10-17 and have recorded no change since. As of our marketplace pass on 2026-10-27.

What it asks for

  • Installs as a plugin bundle

None of the marketplaces we read publishes its tools or the settings it asks for.

What it declares, asks for and runs, in full

Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.

Works with

  • Claude Code

From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.

Connect

Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.

As a Claude Code plugin

Built from what Community GitHub marketplaces declares.

Claude CodeInside a Claude Code session
/plugin marketplace add eranshir/challenger
/plugin install challenger@challenger

Where it is published

MarketplaceStatusVersionFiguresVerifiedFirst seen
Community marketplace eranshir/challenger (Open the source on GitHub) Listed 1.0.0 Forks (GitHub): 6
Stars (GitHub): 44
Not marked

Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.

Listed in one community marketplace
MarketplaceRepositoryStars (GitHub)
challenger eranshir/challenger 44

Which marketplaces we read and how we check them

What the bundle contains

As published on Community GitHub marketplaces.

Skills: 1

  • challenger

What changed

  1. Became a product we track
  2. Community GitHub marketplaces: appeared

Similar plugins

Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.

  • ProofGraph (Antigravity MCP)

    Evidence-first entity and knowledge graph MCP server for AI agents to verify claims.

    by AI-BuildInfra · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • eleata Claim Verifier

    Grounding/hallucination guard: verify a claim against evidence (Supported/Refuted/NEE).

    by hernaninverso · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • dingduff

    DingDuff legal research for Claude: bundles the DingDuff legal-research connector together with the skills that drive it — legal research (find, read, and validate cases…

    by DingDuff · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • Decision QC — AI Devil's Advocate

    Devil's-advocate QC API for AIs: post a decision, get strongest counter-argument. 0.1 USDT/call

    by ugo2000 · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • memoforge

    Multi-agent legal memo drafting: intake questions, planned legal research, a frozen source pack with verifiable quotes, a counterargument and citation review loop, and a footnoted…

    by Grigorii Moskalev · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • Legal Investigative

    Legal and investigative — log evidence, analyze documents, redact, generate briefs, with legal-research/evidence/osint/document-analysis variants.

    by danielrosehill · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • team-deliberation

    Stress-test an idea or decision with a panel of independent specialist subagents: blind analysis, cross-examination, fact checks and a synthesis that keeps the dissent.

    by 2steaks · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • fact-checker

    Verifies factual claims in documents using web search and official sources, then proposes corrections with user confirmation. Use when the user asks to fact-check, verify…

    by daymade · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • doublecheck

    Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.

    by Awesome Copilot Community · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • court-skill

    Puts your idea on trial: a prosecutor Claude, a defense Claude, a jury of 12 Claudes who vote on their own, and a judge who reads the verdict and what would flip it.

    by Alex Chen · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

Similar plugins by marketplace

The same question asked of one marketplace at a time: is there an analog of this plugin there?

Has a listing on Claude Code: claude-plugins-community (5)
  • bettercallclaude

    Swiss Legal Intelligence for Claude Cowork. 20 agents, 19 commands, 14 skills, and 9 MCP servers covering BGE/ATF/DTF precedent research, litigation strategy, document drafting…

    by fedec65 · Plugin bundle

    Listed on: Claude Code: claude-plugins-community, Community GitHub marketplaces · Describes nearly the same job

  • bengo-toolkit

    Japanese law firm plugin for Claude Code — court template filling, family tree generation (相続関係説明図), legal document proofreading, lawsuit analysis, e-Gov law search, and…

    by llamadrive · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

  • debate

    Structured multi-round debate between AI tools with proposer / challenger roles and a final verdict. `/debate` orchestrates a back-and-forth between two AI CLIs (Gemini, Codex…

    by agent-sh · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

  • legalzoom

    Attorney guidance and legal tools for business and personal needs. AI-powered document review identifies critical risks and important clauses, advises when to engage an attorney…

    by legalzoom · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community · Describes nearly the same job

  • the-courtroom

    Cross-model deliberation plugin — Claude proposes an implementation plan, Codex CLI cross-examines it, they debate (ACCEPT/REJECT/COMPROMISE), and the approved verdict gets…

    by JustineDaveMagnaye · Plugin bundle

    Listed on: Claude Code: claude-plugins-community · Describes nearly the same job

Has a listing on Claude Code: claude-plugins-official (5)
  • GC AI

    Work in your GC AI legal knowledge base from Claude: upload documents, run review playbooks, and ask questions grounded in your own files, all as you.

    by GC-AI-Inc · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Describes nearly the same job

  • legalzoom

    Attorney guidance and legal tools for business and personal needs. AI-powered document review identifies critical risks and important clauses, advises when to engage an attorney…

    by legalzoom · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community · Describes nearly the same job

  • GovTribe

    Government contracting research and capture workflows in Claude: opportunity and pipeline briefs, bid/no-bid and competitor analysis, price-to-win and proposal prep, powered by…

    by GovTribe · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Describes a similar job

  • youdotcom-agent-skills

    You.com agent skills for web search, research with citations, and content extraction. Guided integrations for Vercel AI SDK, Claude Agent SDK, OpenAI Agents SDK, crewAI…

    by youdotcom-oss · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community · Describes a similar job

  • hookify

    Easily create custom hooks to prevent unwanted behaviors by analyzing conversation patterns or from explicit instructions. Define rules via simple markdown files.

    by Anthropic · Plugin bundle

    Listed on: Claude Code: claude-plugins-official · Describes a similar job

Has a listing on Claude: knowledge-work-plugins (5)
  • GC AI

    Work in your GC AI legal knowledge base from Claude: upload documents, run review playbooks, and ask questions grounded in your own files, all as you.

    by GC-AI-Inc · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Describes nearly the same job

  • Legal

    Speed up contract review, NDA triage, and compliance workflows for in-house legal teams. Draft legal briefs, organize precedent research, and manage institutional knowledge.

    by Anthropic · Plugin bundle

    Listed on: Claude: knowledge-work-plugins · Describes nearly the same job

  • GovTribe

    Government contracting research and capture workflows in Claude: opportunity and pipeline briefs, bid/no-bid and competitor analysis, price-to-win and proposal prep, powered by…

    by GovTribe · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Describes a similar job

  • exa

    Exa AI web search, deep research, and content extraction. Provides MCP tools and research skills for comprehensive web search, people discovery, company research, academic papers…

    by exa-labs · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Official MCP Registry, Docker MCP Catalog, Claude: knowledge-work-plugins, Community GitHub marketplaces · Describes a similar job

  • Claude for Financial Advisors

    Ready-to-run workflows for financial advisors in Claude Cowork, drawing live data from the tools their firm already uses through third-party connectors. The plugin holds no client…

    by anthropics · Plugin bundle

    Listed on: Claude: knowledge-work-plugins, Community GitHub marketplaces · Describes a similar job

Has a listing on Codex: openai-curated (openai/plugins) (5)
  • Plugin Eval

    Evaluate Codex skills and plugins from chat with a beginner-friendly start command, local-first reports, token budget explanations, and guided benchmarking.

    by OpenAI Codex · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes nearly the same job

  • Notion

    Notion workflows for implementation planning, research synthesis, meeting preparation, and knowledge capture.

    by Notion · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes nearly the same job

  • Data Analytics

    Answer product and business questions with data

    by Data Analytics Maintainers · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes nearly the same job

  • Linear

    Search, create and update Linear issues, projects, and initiatives. Draft PRDs, write updates, analyze customer requests, and keep plans up to date — all from within ChatGPT

    by Linear Orbit, Inc · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes nearly the same job

  • Google Drive

    Use Google Drive as the single entrypoint for Drive, Docs, Sheets, and Slides work.

    by OpenAI · Plugin bundle

    Listed on: Codex: openai-curated (openai/plugins) · Describes nearly the same job

Has a listing on Community GitHub marketplaces (5)
  • dingduff

    DingDuff legal research for Claude: bundles the DingDuff legal-research connector together with the skills that drive it — legal research (find, read, and validate cases…

    by DingDuff · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • memoforge

    Multi-agent legal memo drafting: intake questions, planned legal research, a frozen source pack with verifiable quotes, a counterargument and citation review loop, and a footnoted…

    by Grigorii Moskalev · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • Legal Investigative

    Legal and investigative — log evidence, analyze documents, redact, generate briefs, with legal-research/evidence/osint/document-analysis variants.

    by danielrosehill · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • team-deliberation

    Stress-test an idea or decision with a panel of independent specialist subagents: blind analysis, cross-examination, fact checks and a synthesis that keeps the dissent.

    by 2steaks · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

  • fact-checker

    Verifies factual claims in documents using web search and official sources, then proposes corrections with user confirmation. Use when the user asks to fact-check, verify…

    by daymade · Plugin bundle

    Listed on: Community GitHub marketplaces · Describes nearly the same job

Has a listing on Copilot CLI: github/awesome-copilot (5)
  • agent-council

    A runtime-portable 5-agent quality gate that adjudicates text artifacts before they ship. Five role-conditioned LLM deliberators run a 2-round async protocol with cross-read…

    by Avyayalaya · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes nearly the same job

  • doublecheck

    Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.

    by Awesome Copilot Community · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes nearly the same job

  • noob-mode

    Plain-English translation layer for non-technical Copilot CLI users. Translates every approval prompt, error message, and technical output into clear, jargon-free English with…

    by Awesome Copilot Community · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes a similar job

  • copilot-goal-skill

    Goal-driven task orchestration with independent verification. Interviews the user to define a clear goal, then loops between a Builder subagent (does the work) and an Inspector…

    by gsemet · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes a similar job

  • roundup

    Self-configuring status briefing generator. Learns your communication style from examples, discovers your data sources, and produces draft updates for any audience on demand.

    by Awesome Copilot Community · Plugin bundle

    Listed on: Copilot CLI: github/awesome-copilot · Describes a similar job

Has a listing on Copilot CLI: github/copilot-plugins (5)
  • workiq

    Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes nearly the same job

  • microsoft-365-agents-toolkit

    Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes nearly the same job

  • workiq-productivity

    WorkIQ productivity skills powered by the local WorkIQ CLI — read-only insights across email, meetings, calendar, Teams, SharePoint, projects, and people.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes nearly the same job

  • advanced-security

    Advanced Security plugin for GitHub Copilot.

    by github · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes nearly the same job

  • azure-devops-copilot-plugin

    Bring Azure DevOps work-item, repository, and pull-request workflows into GitHub Copilot.

    by microsoft · Plugin bundle

    Listed on: Copilot CLI: github/copilot-plugins · Describes a similar job

Has a listing on Cursor: cursor/plugins (5)
  • Guru

    Search company knowledge and draft verified answers.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Clay

    Enrich people and companies, run AI research agents.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Profound

    Track AI visibility, sentiment, and citations.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Advisor

    Consult a stronger model before major decisions, when stuck, and before declaring done.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

  • Gamma

    Generate presentations, documents, and webpages.

    by Cursor · Plugin bundle

    Listed on: Cursor: cursor/plugins · Describes nearly the same job

Has a listing on Docker MCP Catalog (5)
  • Perplexity API Platform

    Real-time web search, reasoning, and research through Perplexity's API

    by perplexity.ai · MCP server

    Listed on: Official MCP Registry, Docker MCP Catalog, npm registry (MCP servers), Community GitHub marketplaces · Describes nearly the same job

  • Needle Remote

    Production-ready RAG service to search and retrieve data from your documents.

    by docker · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

  • Sequential Thinking (Reference)

    Dynamic and reflective problem-solving through thought sequences.

    by modelcontextprotocol · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

  • exa

    Exa AI web search, deep research, and content extraction. Provides MCP tools and research skills for comprehensive web search, people discovery, company research, academic papers…

    by exa-labs · Plugin bundle

    Listed on: Claude Code: claude-plugins-official, Official MCP Registry, Docker MCP Catalog, Claude: knowledge-work-plugins, Community GitHub marketplaces · Describes nearly the same job

  • Program Integrity Alliance

    An MCP server to help make U.S. Government open datasets AI-friendly.

    by Program-Integrity-Alliance · MCP server

    Listed on: Docker MCP Catalog · Describes nearly the same job

Has a listing on Official MCP Registry (5)
  • ProofGraph (Antigravity MCP)

    Evidence-first entity and knowledge graph MCP server for AI agents to verify claims.

    by AI-BuildInfra · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • eleata Claim Verifier

    Grounding/hallucination guard: verify a claim against evidence (Supported/Refuted/NEE).

    by hernaninverso · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Decision QC — AI Devil's Advocate

    Devil's-advocate QC API for AIs: post a decision, get strongest counter-argument. 0.1 USDT/call

    by ugo2000 · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • HumanProblems

    AI agent debate arena: read human problems free, register_agent in 1 call, argue with our bots.

    by humanproblems.ai · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

  • Citation Safe Verifier

    Verifies legal citations vs primary sources: existence, quote match, proposition support.

    by citationsafe.com · MCP server

    Listed on: Official MCP Registry · Describes nearly the same job

Has a listing on PyPI (MCP servers) (5)
  • Regulations.gov

    Regulations.gov readiness, rulemaking dockets, documents, comments, and comment periods. 9 tools.

    by 1102tools.com · MCP server

    Listed on: Official MCP Registry, PyPI (MCP servers) · Describes nearly the same job

  • Outline MCP Server

    Connect AI assistants to Outline for document search, reading, and management

    by Vortiago · MCP server

    Listed on: Official MCP Registry, Claude Code: claude-plugins-community, PyPI (MCP servers), Community GitHub marketplaces · Describes nearly the same job

  • gb-eli-mcp io.github.matematicsolutions/gb-eli-mcp

    MCP server for UK legislation, case law (Find Case Law), GOV.UK tribunal decisions and HMRC manuals.

    by matematicsolutions · MCP server

    Listed on: Official MCP Registry, PyPI (MCP servers) · Describes nearly the same job

  • Federal Register

    Federal Register proposed and final rules, notices, executive orders, and FAR cases. 8 tools.

    by 1102tools.com · MCP server

    Listed on: Official MCP Registry, PyPI (MCP servers) · Describes nearly the same job

  • fedlex-mcp io.github.malkreide/fedlex-mcp

    Swiss federal law, consultations (Fedlex) & TERMDAT terminology (LINDAS) via SPARQL

    by malkreide · MCP server

    Listed on: Official MCP Registry, PyPI (MCP servers) · Describes nearly the same job

Has a listing on npm registry (MCP servers) (5)
  • TruthPal

    Verify claims against sources: source verification, citation checking; $0.02 USDC on Base.

    by corslet1 · MCP server

    Listed on: Official MCP Registry, npm registry (MCP servers) · Describes nearly the same job

  • questlaw-library io.github.QuestLaw/questlaw-library

    Access your QuestLaw library in GenAI Tools.

    by QuestLaw · MCP server

    Listed on: Official MCP Registry, npm registry (MCP servers) · Describes nearly the same job

  • ris io.github.Honeyfield-Org/ris

    Access Austrian laws, court decisions & legal documents via the RIS API.

    by Honeyfield-Org · MCP server

    Listed on: Official MCP Registry, npm registry (MCP servers) · Describes nearly the same job

  • mistral-mcp io.github.Swih/mistral-mcp

    Mistral MCP server: extract invoices and documents from text, Markdown or OCR into typed JSON.

    by Swih · MCP server

    Listed on: Official MCP Registry, Claude Code: claude-plugins-community, npm registry (MCP servers), Community GitHub marketplaces · Describes a similar job

  • OpenJEV

    Typed AI judgments for agents: choice, score, and yes/no probabilities instead of prose.

    by markylaredo · MCP server

    Listed on: Official MCP Registry, npm registry (MCP servers) · Describes a similar job

Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.

Want this mark on your plugin in our catalog?

Prove you maintain it with a file in its repository, a file on your domain or a DNS record, and you can show this mark on the card, with live banners for your site and README. How verification works

You also get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.

Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.

Where the data comes from: how the catalog is built