# SC-035: Phase 5 Creates SKILL.md as the First and Primary File

> Covers: FR-023 — Phase 5 (Implementation) MUST create SKILL.md as the first and primary file
> Type: Happy Path

## Given
- The meta-skill has completed Phases 1-4 for a "data pipeline orchestrator" skill

## When
- Phase 5 (Implementation) begins generating files

## Then
- SKILL.md is the first file created in the implementation sequence
- SKILL.md contains spec-compliant frontmatter (`name`, `description` at minimum)
- marketplace.json is NOT created before or instead of SKILL.md
- The SKILL.md is the primary file that defines the skill's behavior

## Verification Method

**Method**: Manual test

**Steps**:
1. Run the meta-skill and observe Phase 5 output
2. Verify the first file mentioned/created is SKILL.md
3. Verify SKILL.md has valid frontmatter
4. Verify marketplace.json is NOT created for this simple skill

**Expected evidence**: Phase 5 log shows "Creating SKILL.md..." as the first file operation. The generated SKILL.md has valid `name` and `description` frontmatter fields.