challenge SKILL.md skillA
challenge from alirezarezvani/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add alirezarezvani/claude-skills/challenge@git:20261031.a0c7b8fPins git:20261031.a0c7b8f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- alirezarezvani/claude-skills
- Path
c-level-advisor/executive-mentor/skills/challenge/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261031.a0c7b8f, committed Oct 31, 2026
- First version recorded
- Mar 6, 2026
- Size
- 6,714 bytes
- Repository stars
- 29,054
- License
- MIT
Use before committing serious resources to a plan, or when feedback has been suspiciously positive. Runs a pre-mortem: assume it failed in 12 months and work back to the assumptions, dependencies and execution risks.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# /executive-mentor:challenge — Pre-Mortem Plan Analysis **Command:** `/executive-mentor:challenge <plan>` Systematically finds weaknesses in any plan before reality does. Not to kill the plan — to make it survive contact with reality. --- ## The Core Idea Most plans fail for predictable reasons. Not bad luck — bad assumptions. Overestimated demand. Underestimated complexity. Dependencies nobody questioned. Timing that made sense in a spreadsheet but not in the real world. The pre-mortem technique: **imagine it's 12 months from now and this plan failed spectacularly. Now work backwards. Why?** That's not pessimism. It's how you build something that doesn't collapse. --- ## When to Run a Challenge - 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 - When there's pressure to move fast and "figure it out later" - When you feel excited about the plan (excitement is a signal to scrutinize harder) --- ## The Challenge Framework ### Step 1: Extract Core Assumptions …
Read the whole file at its exact version.
How to install
mdr add alirezarezvani/claude-skills/challenge@sha256:6fa580dcaa64e4f4The line at the top of this page pins the label git:20261031.a0c7b8f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ffdmog3pd3l6v7qb)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Mar 6, 2026 and Oct 31, 2026, about one every 60 days. Its first recorded version is graded C and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261031.a0c7b8f latest | 2026-10-31 | a0c7b8f | 6,714 B | A | view · diff |
| git:20261030.b078bb8 | 2026-10-30 | b078bb8 | 6,672 B | A | view · diff |
| git:20260514.1b152ab | 2026-05-14 | 1b152ab | 6,853 B | A | view · diff |
| git:20260309.8902ba7 | 2026-03-09 | 8902ba7 | 6,499 B | A | view · diff |
| git:20260306.e145ac4 | 2026-03-06 | e145ac4 | 6,413 B | C | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6714 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
alirezarezvani/claude-skills · 29,054 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ffdmog3pd3l6v7qb GET https://markdownregistry.com/api/v1/resolve?ref=alirezarezvani/claude-skills/challenge GET https://markdownregistry.com/api/v1/blob/6fa580dcaa64e4f47d0ad9aa1b76fbf035eaede5521edb60f17b37f2d8665127
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from alirezarezvani/claude-skills
Every file in alirezarezvani/claude-skills