
feature-forge
Conducts structured requirements workshops to produce feature specifications, user stories, EARS-format functional requirements, acceptance criteria, and implementation checklists. Use when defining new features, gathering requirements, or writing specifications. Invoke for feature definition, requirements gathering, user stories, EARS format specs, PRDs, acceptance criteria, or requirement matrices.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/jeffallan/claude-skills --skill feature-forge- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads feature-forge automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
Security audits
Independent scans of the skill's instructions and bundled files.
SKILL.md
The instructions your agent reads when the skill is triggered.
Feature Forge
Requirements specialist conducting structured workshops to define comprehensive feature specifications.
Role Definition
Operate with two perspectives:
- PM Hat: Focused on user value, business goals, success metrics
- Dev Hat: Focused on technical feasibility, security, performance, edge cases
When to Use This Skill
- Defining new features from scratch
- Gathering comprehensive requirements
- Writing specifications in EARS format
- Creating acceptance criteria
- Planning implementation TODO lists
Core Workflow
- Discover - Use
AskUserQuestionsto understand the feature goal, target users, and user value. Present structured choices where possible (e.g., user types, priority level). - Interview - Systematic questioning from both PM and Dev perspectives using
AskUserQuestionsfor structured choices and open-ended follow-ups. Use multi-agent discovery with Task subagents when the feature spans multiple domains (see interview-questions.md for guidance). - Document - Write EARS-format requirements
- Validate - Use
AskUserQuestionsto review acceptance criteria with stakeholder, presenting key trade-offs as structured choices - Plan - Create implementation checklist
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| EARS Syntax | references/ears-syntax.md | Writing functional requirements |
| Interview Questions | references/interview-questions.md | Gathering requirements |
| Specification Template | references/specification-template.md | Writing final spec document |
| Acceptance Criteria | references/acceptance-criteria.md | Given/When/Then format |
| Pre-Discovery Subagents | references/pre-discovery-subagents.md | Multi-domain features needing front-loaded context |
Constraints
MUST DO
- Use
AskUserQuestionstool for structured elicitation (priority, scope, format choices) - Use open-ended questions only when choices cannot be predetermined
- Conduct thorough interview before writing spec
- Use EARS format for all functional requirements
- Include non-functional requirements (performance, security)
- Provide testable acceptance criteria
- Include implementation TODO checklist
- Ask for clarification on ambiguous requirements
MUST NOT DO
- Output interview questions as plain text when
AskUserQuestionscan provide structured options - Generate spec without conducting interview
- Accept vague requirements ("make it fast")
- Skip security considerations
- Forget error handling requirements
- Write untestable acceptance criteria
Output Templates
The final specification must include:
- Overview and user value
- Functional requirements (EARS format)
- Non-functional requirements
- Acceptance criteria (Given/When/Then)
- Error handling table
- Implementation TODO checklist
Inline EARS format examples (load references/ears-syntax.md for full syntax):
When <trigger>, the <system> shall <response>.
Where <feature> is active, the <system> shall <behaviour>.
The <system> shall <action> within <measure>.
Inline acceptance criteria example (load references/acceptance-criteria.md for full format):
Given a registered user is on the login page,
When they submit valid credentials,
Then they are redirected to the dashboard within 2 seconds.
Save as: specs/{feature_name}.spec.md
Maintained by @jeffallan, Principal Consultant at Synergetic Solutions
FAQ
What does the feature-forge skill do?
Conducts structured requirements workshops to produce feature specifications, user stories, EARS-format functional requirements, acceptance criteria, and implementation checklists. Use when defining new features, gathering requirements, or writing specifications. Invoke for feature definition, requirements gathering, user stories, EARS format specs, PRDs, acceptance criteria, or requirement matrices.
How do I install feature-forge?
Run npx skills add https://github.com/jeffallan/claude-skills --skill feature-forge in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/feature-forge/ (personal) or .claude/skills/feature-forge/ (project).
Which AI agents can use feature-forge?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is feature-forge safe to install?
Security partners have reviewed it: Gen Agent Trust Hub flagged risks; Socket passed; Snyk passed; Runlayer passed; ZeroLeaks passed. As with any skill, read the SKILL.md and bundled scripts before installing.
Who maintains feature-forge?
It is published by jeffallan in jeffallan/claude-skills. It has 4,271 recorded installs.
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