---

name: plan-spec description: Plan specification (enters plan mode) user-invocable: true

Plan Specification (Plan Mode)

Prerequisites

Run /fetch-issue <ALG-XX> first to fetch issue context and create branch.

Steps

1. Enter plan mode: Call the EnterPlanMode tool to begin planning.

2. Analyze fetched issue context from the conversation:

   • Issue title and description
   • Labels and status
   • Related specs (if any were found)

3. Ask up to 5 clarifying questions using AskUserQuestion: Focus on:

   • Ambiguous or vague requirements
   • Missing acceptance criteria
   • Unclear scope boundaries
   • Priority of different user stories
   • Technical constraints not mentioned

4. Explore related code if needed:

   • If related specs were found, read them for patterns
   • Search codebase for relevant existing implementations
   • Understand the domain context

5. Propose spec structure in the plan file: Write to the plan file (NOT spec.md yet) with:

   • Summary: 2-3 sentences from issue description
   • User Scenarios & Testing:
     • Multiple user stories with priorities (P1, P2, P3)
     • Each with "Why this priority" explanation
     • Acceptance scenarios in Given/When/Then format
   • Edge Cases: Explicit list of edge cases
   • Functional Requirements: FR-001, FR-002, etc.
   • Dependencies: Links to related specs (e.g., @specs/alg-14-discover-chat)
   • Out of Scope: Explicit boundaries

6. Exit plan mode: Call ExitPlanMode to get user approval of the proposed spec structure.

7. After approval, write the spec file:

   • Get branch info: git rev-parse --abbrev-ref HEAD

   • Extract issue number from branch name (e.g., alg-27-* -> 27)

   • Write specs/alg-{NUM}-*/spec.md with the approved structure

   • Include header:

     Copy# Feature Specification: {Title}
     
     **Feature Branch**: `{branch-name}`
     **Created**: {ISO date}
     **Status**: Draft
     **Linear Issue**: [ALG-{NUM}](https://linear.app/algojuke/issue/ALG-{NUM})
     **Input**: {Original issue description}
     

8. Commit the spec:

   Copygit add specs/alg-{NUM}-*/spec.md
   git commit -m "spec: ALG-{NUM} - initial specification"
   

Spec Template Reference

Follow the structure from existing specs like specs/alg-14-discover-chat/spec.md:

• User Scenarios with priorities and acceptance scenarios
• Functional Requirements numbered FR-001, FR-002
• Clear scope boundaries
• Clarifications section for Q&A