Feature Specification

Feature Specification Skill

Generate a Feature Specification from an approved FRS issue + domain design docs. Posts the result as a GitLab Feature Spec issue linked to the FRS issue.

No local files are written. The Feature Spec lives exclusively as a GitLab issue.

Step 0: Gather Inputs

Ask the user:

1. "What is the FRS GitLab issue ID?" (e.g., #42)
2. "What is the bounded context slug?" (e.g., payment-processing)

Then read:

# Fetch FRS issue
mcp__gitlab__get_issue(project_id: <from CLAUDE.md>, issue_iid: <frs_iid>)

# Read domain design artifacts
Read docs/contexts/<bc-slug>/BC_SPEC.md
Read docs/contexts/<bc-slug>/aggregates/AGGREGATE_*.md  (all aggregate files)

Step 1: Generate Feature Specification

Extract User Stories

From the FRS User Scenarios section, derive one user story per scenario:

Format: "As a <actor>, I want to <action> so that <value>"

• Each story must reference a named actor from the FRS Actors table
• The action must map to a command in the domain design aggregates
• The value must relate to a business goal in the FRS Overview

Story IDs: US-001, US-002, ...

Write Acceptance Criteria

For each user story, write Given/When/Then acceptance criteria:

Given: <precondition — system state, actor context>
When:  <action the actor takes>
Then:  <observable outcome — state change, event, response>

Each criterion must be independently verifiable. No "and" clauses in Then — split into separate criteria.

Map Stories to Domain

For each user story:

• Identify the bounded context that owns it (from BC_SPEC.md)
• Identify which aggregate handles the command (from AGGREGATE_*.md)
• List the commands triggered

Step 2: Fill Issue Template

1. Load skills/feature-specification/templates/feature-spec-issue-template.md
2. Fill every {{placeholder}} with extracted content from Step 1

Step 3: Create GitLab Issue

mcp__gitlab__create_issue(
  project_id: <from CLAUDE.md>,
  title: "Feature: <feature-name>",
  description: <filled template content>,
  labels: ["feature-spec", "<bc-slug>"]
)

Then link it to the FRS issue:

mcp__gitlab__create_issue_link(
  project_id: <from CLAUDE.md>,
  issue_iid: <feature_spec_iid>,
  target_project_id: <from CLAUDE.md>,
  target_issue_iid: <frs_iid>
)

Step 4: Present for Approval

═══════════════════════════════════════════════════════
Feature Specification Ready for Review
═══════════════════════════════════════════════════════

Feature:    <feature-name>
GitLab URL: <issue_url>
Issue ID:   #<iid>
Linked to:  FRS #<frs_iid>

User Stories:         <n>
Acceptance Criteria:  <n>
Bounded Contexts:     <list>

───────────────────────────────────────────────────────
APPROVAL REQUIRED

Review the Feature Spec issue above. When ready:
→ Run /agentic-dev-flow:implementation-execution
  and provide Feature Spec Issue ID: #<iid>

═══════════════════════════════════════════════════════

Stop here. Do not proceed to implementation-execution without user approval.

Hard Stop Rules

• Do NOT create local files
• Do NOT proceed to implementation-execution automatically
• Every user story must trace to at least one aggregate command