Challenge
- 1.4k installs
- 23.5k repo stars
- Updated July 17, 2026
- alirezarezvani/claude-skills
challenge is an agent skill that Pre-mortem plan analysis. Imagine the plan failed 12 months from now and work backwards to find the weaknesses. Surfaces assumptions, dependencies, and executio.
About
Pre-mortem plan analysis. Imagine the plan failed 12 months from now and work backwards to find the weaknesses. Surfaces assumptions, dependencies, and execution risks before committing resources. Use when before significant resource commitment, before presenting to a board or investors, when feedback has been one-sidedly positive, or when there is pressure to move fast and figure it out later. --- name: "challenge" description: "Pre-mortem plan analysis. Imagine the plan failed 12 months from now and work backwards to find the weaknesses. Surfaces assumptions, dependencies, and execution risks before committing resources. Use when before significant resource commitment, before presenting to a board or investors, when feedback has been one-sidedly positive, or when there is pressure to move fast and figure it out later." --- # /em:challenge - Pre-Mortem Plan Analysis **Command:** `/em:challenge <plan>` Systematically finds weaknesses in any plan before reality does. Not to kill the plan - to make it survive contact with reality.
- /em:challenge - Pre-Mortem Plan Analysis
- Before committing significant resources to a plan
- Before presenting to the board or investors
- When you notice you're only hearing positive feedback about the plan
- When the plan requires multiple external dependencies to align
Challenge by the numbers
- 1,423 all-time installs (skills.sh)
- +3 installs in the week ending Jul 29, 2026 (Skillselion tracking)
- Ranked #483 of 2,159 Testing & QA skills by installs in the Skillselion catalog
- Security screen: LOW risk (skills.sh audit)
- Data as of Jul 31, 2026 (Skillselion catalog sync)
challenge capabilities & compatibility
- Capabilities
- /em:challenge — pre mortem plan analysis · before committing significant resources to a pla · before presenting to the board or investors · when you notice you're only hearing positive fee · when the plan requires multiple external depende
- Use cases
- documentation
What challenge says it does
--- name: "challenge" description: "Pre-mortem plan analysis.
Imagine the plan failed 12 months from now and work backwards to find the weaknesses.
Surfaces assumptions, dependencies, and execution risks before committing resources.
Not to kill the plan — to make it survive contact with reality.
npx skills add https://github.com/alirezarezvani/claude-skills --skill challengeAdd your badge
Show developers this skill is listed on Skillselion. Paste this into your README.
| Installs | 1.4k |
|---|---|
| repo stars | ★ 23.5k |
| Security audit | 3 / 3 scanners passed |
| Last updated | July 17, 2026 |
| Repository | alirezarezvani/claude-skills ↗ |
What problem does challenge solve for developers using this skill?
Pre-mortem plan analysis. Imagine the plan failed 12 months from now and work backwards to find the weaknesses. Surfaces assumptions, dependencies, and execution risks before committing resources. Use
Who is it for?
Developers who need challenge patterns described in the cached skill documentation.
Skip if: Skip when docs are empty or the task is outside the skill's documented scope.
When should I use this skill?
Pre-mortem plan analysis. Imagine the plan failed 12 months from now and work backwards to find the weaknesses. Surfaces assumptions, dependencies, and execution risks before committing resources. Use
What you get
Actionable workflows and conventions from SKILL.md for challenge.
- Pre-mortem risk report
- Assumption and dependency list
By the numbers
- Uses a twelve-month backward-looking pre-mortem timeframe
Files
../../../c-level-advisor/executive-mentor/skills/challenge/SKILL.md
Related skills
TddFollow test-driven development with a strict red-green-refactor loop when creating reliable features or fixing bugs.510k185k
Test Driven DevelopmentEnforce writing failing tests before any production implementation code.176k260kQaRun conversational QA sessions that turn user-reported bugs into well-written, domain-aware GitHub issues without manual ticket writing.164k185kMigrate To ShoehornAutomatically update TypeScript test files that rely on unsafe `as` type assertions by replacing them with type-safe partial objects from @total-typescript/shoehorn.151k185k
Webapp TestingVerify frontend behavior, debug UI issues, capture screenshots, and inspect logs of a running local web application using Playwright.121k164k
Playwright CliRun browser automation, generate element snapshots, inspect DOM attributes, and execute Playwright tests from the terminal.96.3k12.2kHow it compares
Pick this over generic critique prompts when you need a structured pre-mortem framework instead of ad-hoc devil's advocate comments.
FAQ
What does challenge do?
Pre-mortem plan analysis. Imagine the plan failed 12 months from now and work backwards to find the weaknesses. Surfaces assumptions, dependencies, and execution risks before committing resources. Use when before signifi
When should I use challenge?
Pre-mortem plan analysis. Imagine the plan failed 12 months from now and work backwards to find the weaknesses. Surfaces assumptions, dependencies, and execution risks before committing resources. Use when before signifi
Is challenge safe to install?
Review the Security Audits panel on this page before installing in production.