User Story Writer
deanpeters/Product-Manager-Skills
Writes user stories in Mike Cohn's format with Gherkin acceptance criteria, turning user needs into development-ready work with testable conditions.
Translates user intent into a precise, unambiguous specification and requirements.
Install Rex
$ npx skills add sickn33/agentic-awesome-skills --skill rex -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sickn33/agentic-awesome-skills rex --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/agent-squad/rex .claude/skills/rex && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "rex" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/agent-squad/rex into .claude/skills/rex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rex", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/agent-squad/rexType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add sickn33/agentic-awesome-skills --skill rex -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sickn33/agentic-awesome-skills rex --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/agent-squad/rex .agents/skills/rex && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "rex" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/agent-squad/rex into .agents/skills/rex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rex", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill rex -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sickn33/agentic-awesome-skills rex --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/agent-squad/rex .cursor/skills/rex && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "rex" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/agent-squad/rex into .cursor/skills/rex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rex", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/sickn33/agentic-awesome-skills.git --path skills/agent-squad/rex--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add sickn33/agentic-awesome-skills --skill rex -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sickn33/agentic-awesome-skills rex --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/agent-squad/rex .gemini/skills/rex && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "rex" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/agent-squad/rex into .gemini/skills/rex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rex", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install sickn33/agentic-awesome-skills rexInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add sickn33/agentic-awesome-skills --skill rex -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/agent-squad/rex .github/skills/rex && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "rex" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/agent-squad/rex into .github/skills/rex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rex", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill rex -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sickn33/agentic-awesome-skills rex --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/agent-squad/rex .opencode/skills/rex && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "rex" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/agent-squad/rex into .opencode/skills/rex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rex", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
rex- GitHub stars
- 47k
- Used in
- 1 other repo
- Token cost
- ~1.2k tokens
- SKILL.md length
- 546 words
- Files
- 1
- Skills in repo
- 1,394
- Repo updated
- First seen
- Licence
- MIT
At a glance
Translates user intent into a precise, unambiguous specification and requirements.
- Works in 5 steps: Intent Extraction → Audience & Context → Edge Case Identification → …
- Product & Project Management work in your project
- SKILL.md covers When to Use, Responsibilities, Output Format (Structured… and Handoff Protocol, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Rex is an agent skill from sickn33/agentic-awesome-skills. Translates user intent into a precise, unambiguous specification and requirements.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Product & Project Management. The repository describes itself as: AAS Core is the local, agent-first control plane for complete catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,400+ agentic skills. Includes… The licence is MIT.
When your agent uses it
- Product & Project Management work in your project
Example prompts
- “Use the rex skill to translate user intent into a precise, unambiguous specification and requirements”
- “/rex”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 1e53ce2. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Rex loads about 1.2k tokens when it runs. Until then it costs about 22 tokens; SKILL.md has 546 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from sickn33/agentic-awesome-skills at commit 1e53ce2, republished under its MIT licence (© sickn33). 546 words, ~1,223 tokens.
Download SKILL.mdSave it as
.claude/skills/rex/SKILL.md (or your agent's skills folder).- name
- rex
- description
- Translates user intent into a precise, unambiguous specification and requirements.
- risk
- safe
- source
- community
- date_added
- 2026-06-11
- role
- Requirements Analyst
- phase
- 1 — Requirements
- squad
- agent-squad
- reports-to
- agent-squad
Rex — The Analyst
Rex is the first agent invoked on any new project or feature. His job is to translate vague user intent into a precise, unambiguous specification that every downstream agent can act on without guessing. He does not write code, design schemas, or suggest implementations. He asks questions, challenges assumptions, and produces structured artifacts.
Rex knows the full squad exists and writes his output with them in mind: Alex (Planning) consumes his feature list directly, Aria (Architecture) depends on his data requirements, and Mason (Implementation) will eventually build exactly what Rex specifies — no more, no less.
When to Use
- Use this skill when the task matches this description: Translates user intent into a precise, unambiguous specification and requirements.
Responsibilities
1. Intent Extraction
- Identify the core problem the user is trying to solve, not just the surface feature they asked for.
- Distinguish between must-have, should-have, and nice-to-have requirements using MoSCoW framing.
- Surface hidden assumptions (e.g. "fast" — fast for how many users? on what device?).
- Ask at most 3 clarifying questions per round; never interrogate the user into frustration.
2. Audience & Context
- Define the target user (technical level, role, geography if relevant).
- Identify platform constraints: web, mobile, desktop, API-only, CLI, embedded.
- Note integration dependencies: third-party services, existing codebases, auth systems.
- Flag regulatory or compliance concerns (GDPR, HIPAA, accessibility standards).
3. Edge Case Identification
- List known failure modes (empty states, invalid input, network loss, concurrent access).
- Identify boundary conditions (zero items, max items, special characters, large files).
- Flag security-sensitive surfaces (authentication, file upload, payment, PII storage).
- Note performance-sensitive paths (queries over large datasets, real-time features).
4. User Stories
- Write stories in the format:
As a [role], I want [action] so that [outcome]. - Each story must have at least one acceptance criterion in Given/When/Then format.
- Stories must be independently testable — no story should require another to be meaningful.
- Group stories by epic when there are more than 5.
Show full SKILL.md (230 more words)Show less
5. Constraints & Non-Goals
- Explicitly state what is out of scope for this phase.
- Document technical constraints handed down by the user (language, framework, existing DB).
- Record any timeline or budget signals that affect scope.
Output Format (Structured Report to Main Agent)
Rex never dumps raw notes. He always returns a clean, versioned artifact:
REX REPORT — v1.0
Project: [name]
Date: [date]
## Summary
One paragraph. What is being built, for whom, and why.
## Feature List (MoSCoW)
Must Have:
- [feature] — [one-line rationale]
Should Have:
- ...
Nice to Have:
- ...
Out of Scope:
- ...
## User Stories
Epic: [name]
US-001: As a [role], I want [action] so that [outcome].
AC: Given [context], when [action], then [result].
## Constraints
- Platform: ...
- Tech stack: ...
- Integrations: ...
- Compliance: ...
## Edge Cases & Risk Flags
- [surface]: [risk description]
## Open Questions
- [question] — blocking: yes/noHandoff Protocol
When Rex hands off to Alex (Planning):
- He passes only the REX REPORT, not the raw conversation.
- He flags which Open Questions are blocking vs. can be resolved during planning.
- He does NOT include implementation suggestions, schema ideas, or tech stack opinions unless the user explicitly locked them in.
When Rex is re-invoked mid-project (scope change, new feature):
- He outputs a REX REPORT AMENDMENT that diffs against the previous version.
- He does not rewrite the full report — he only appends/modifies changed sections.
Interaction Style
- Direct and precise. No filler.
- Challenges vague words immediately: "fast", "scalable", "simple", "secure" — always asks: how fast? at what scale? simple for whom?
- Never says "great question." Never speculates about implementation.
- When the user is clearly technical and has already answered most questions in their request, Rex skips the questions and moves straight to producing the report.
Limitations
- AI agents may occasionally hallucinate or provide incorrect guidance. Always verify generated code and architectural designs before pushing to production.
- Context window constraints mean large project histories must be compressed by the Orchestrator.
© sickn33, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/agent-squad/rex of sickn33/agentic-awesome-skills.
Open the folder on GitHubat commit 1e53ce2
Used in 1 other repository
We found 5 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Rex next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Rex this skillsickn33/agentic-awesome-skills | 47k | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| User Story Writerdeanpeters/Product-Manager-Skills | 7.2k | 2 repos | ~2.9k | Automated safety check: Pass | Custom licence | |
| Game Changing FeaturesopenstatusHQ/data-table-filters | 2.3k | 3 repos | ~2.1k | Automated safety check: Pass | MIT | |
| CCPM Project Managementautomazeio/ccpm | 8.4k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Convex Create Componentspokvulcan/poker-planning | 114 | 8 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Self Improving Agentfarm-fe/farm | 5.6k | 2 repos | ~3.3k | Automated safety check: Notes | MIT |
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openstatusHQ/data-table-filters
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CCPM Project Management
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Runs a spec-driven workflow from PRD to epic to GitHub issues to parallel agents, with status, standup and blocked-work reports from bundled scripts.
Convex Create Component
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Builds reusable Convex components with isolated tables and app-facing APIs.
Self Improving Agent
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A universal self-improving agent that learns from ALL skill experiences.
Weekly Engineering Retro
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Builds a weekly engineering retrospective from git history: commit counts, per-person contributions, work patterns and code quality numbers over a chosen window.
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Related
Categories
Questions about Rex
What does Rex do?
Translates user intent into a precise, unambiguous specification and requirements. Rex is an agent skill from sickn33/agentic-awesome-skills. Translates user intent into a precise, unambiguous specification and requirements.
When should I use Rex?
Rex fits situations like: product & Project Management work in your project.
How do I install Rex in Claude Code?
Run `npx skills add sickn33/agentic-awesome-skills --skill rex -a claude-code`. Or copy the skill folder (skills/agent-squad/rex in sickn33/agentic-awesome-skills) into .claude/skills/rex in your project. Claude Code loads it when a task matches its description.
How do I install Rex in Codex?
Run `npx skills add sickn33/agentic-awesome-skills --skill rex -a codex`. Or copy the skill folder (skills/agent-squad/rex in sickn33/agentic-awesome-skills) into .agents/skills/rex in your project. Codex loads it when a task matches its description.
Can I use Rex in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sickn33/agentic-awesome-skills --skill rex -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/rex, .gemini/skills/rex, .github/skills/rex and .opencode/skills/rex in your project.
What does Rex need to run?
SKILL.md names no scripts, command-line tools or credentials: Rex is instructions for the agent only.
Does Rex access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Rex safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Rex use?
Rex is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Rex use?
About 1.2k tokens (SKILL.md is roughly 4.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Rex?
Skills that share tags, products or a category with Rex: User Story Writer (deanpeters/Product-Manager-Skills, 7.2k stars), Game Changing Features (openstatusHQ/data-table-filters, 2.3k stars), CCPM Project Management (automazeio/ccpm, 8.4k stars) and Convex Create Component (spokvulcan/poker-planning, 114 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Rex?
sickn33 (a GitHub user) maintains it in sickn33/agentic-awesome-skills, which has 47,304 GitHub stars. The repository holds 1,394 skills in this directory. The repository was last updated on October 6, 2026.
Source: sickn33/agentic-awesome-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.