Fetch Linear Issue and Create Branch

Input

Linear issue identifier: $ARGUMENTS Examples: ALG-27, 27, alg-27

Steps

1. Parse issue identifier from $ARGUMENTS:

   • Accept formats: ALG-27, 27, alg-27
   • Normalize to ALG-{NUM} for Linear API call
   • Extract number for folder naming

2. Fetch issue details using Linear MCP:

   mcp__linear-server__get_issue with:
   - id: ALG-{NUM}
   - includeRelations: true
   

3. Extract from issue response:

   • identifier: e.g., "ALG-27"
   • title: Issue title
   • description: Full description
   • labels: Array of label names
   • status: Current status
   • relations.blocks: Issues this blocks
   • relations.blockedBy: Issues blocking this
   • relations.relatedTo: Related issues

4. Parse description for mentioned issues:

   • Search for patterns: ALG-\d+ (case-insensitive)
   • Extract unique issue identifiers mentioned in description
   • These are treated as "linked" issues alongside formal relations
   • Example: [ALG-13](https://linear.app/...) -> extract ALG-13

5. For each linked issue (from relations AND description mentions):

   • Use Glob to find specs/alg-{related-num}-*/spec.md (Glob matches files, not directories)
   • If spec.md exists, read the summary section
   • Collect related specs for context

6. Derive kebab-slug from title:

   • Lowercase the title
   • Replace spaces and special chars with hyphens
   • Remove consecutive hyphens
   • Truncate to reasonable length (40 chars max)

7. Create branch and spec directory:

   NUM={extracted number}
   SLUG={kebab-slug}
   git checkout -b alg-${NUM}-${SLUG}
   mkdir -p specs/alg-${NUM}-${SLUG}
   

8. Output context summary:

   • Issue identifier and title
   • Description preview
   • Labels and status
   • Related specs found (with summaries)
   • Created branch name
   • Created spec directory path
   • Prompt: "Run /plan-spec to create the specification"

Notes

• Do NOT create spec.md yet - that's handled by /plan-spec
• Do NOT commit anything - branch creation is uncommitted
• If branch already exists, ask user whether to switch to it or create fresh
• If spec directory already exists, warn user and ask to proceed