feat: implement Phase 1 Foundation & Governance (Quality Bar, Security, CoC) [skip ci]

docs/QUALITY_BAR.md

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+# 🏆 Quality Bar & Validation Standards
+
+To transform **Antigravity Awesome Skills** from a collection of scripts into a trusted platform, every skill must meet a specific standard of quality and safety.
+
+## The "Validated" Badge ✅
+
+A skill earns the "Validated" badge only if it passes these **5 automated checks**:
+
+### 1. Metadata Integrity
+
+The `SKILL.md` frontmatter must be valid YAML and contain:
+
+- `name`: Kebab-case, matches folder name.
+- `description`: Under 200 chars, clear value prop.
+- `risk`: One of `[none, safe, critical, offensive]`.
+- `source`: URL to original source (or "self" if original).
+
+### 2. Clear Triggers ("When to use")
+
+The skill MUST have a section explicitly stating when to trigger it.
+
+- **Good**: "Use when the user asks to debug a React component."
+- **Bad**: "This skill helps you with code."
+
+### 3. Safety & Risk Classification
+
+Every skill must declare its risk level:
+
+- 🟢 **none**: Pure text/reasoning (e.g., Brainstorming).
+- 🔵 **safe**: Reads files, runs safe commands (e.g., Linter).
+- 🟠 **critical**: Modifies state, deletes files, pushes to prod (e.g., Git Push).
+- 🔴 **offensive**: Pentesting/Red Team tools. **MUST** have "Authorized Use Only" warning.
+
+### 4. Copy-Pasteable Examples
+
+At least one code block or interaction example that a user (or agent) can immediately use.
+
+### 5. Explicit Limitations
+
+A list of known edge cases or things the skill _cannot_ do.
+
+- _Example_: "Does not work on Windows without WSL."
+
+---
+
+## Support Levels
+
+We also categorize skills by who maintains them:
+
+| Level         | Badge | Meaning                                             |
+| :------------ | :---- | :-------------------------------------------------- |
+| **Official**  | 🟣    | Maintained by the core team. High reliability.      |
+| **Community** | ⚪    | Contributed by the ecosystem. Best effort support.  |
+| **Verified**  | ✨    | Community skill that has passed deep manual review. |
+
+---
+
+## How to Validate Your Skill
+
+Run the validator script before submitting a PR:
+
+```bash
+python3 scripts/validate_skills.py --strict
+```