Enrich SKILL.md frontmatter with OpenClaw schema fields

[TechNickAI]

Summary

• Adds typed metadata.openclaw fields across all 24 skills: homepage, category, and (where applicable) requires.bins, os, install specs
• Pure additive change — zero existing fields removed; each skill's version bumped, root VERSION 0.28.0 → 0.29.0
• Fills in missing required fields on three skills: tgcli-topics (version + triggers + metadata), vapi-calls (triggers + metadata + apiKey), workflow-builder (triggers)

What changed

Per-skill additions:

• homepage: https://github.com/TechNickAI/openclaw-config/tree/main/skills/<skill> on every skill
• category: integrations / productivity / development / knowledge / meta / operations
• requires.bins: declared on apple-photos (osxphotos), claude-code (claude), gateway-restart & openclaw (openclaw), tgcli-topics (tgcli, python3), todoist (td)
• os: [darwin]: alongside existing platform: macos on apple-photos
• install spec: added for todoist (npm @doist/todoist-cli); preserved tgcli's existing go install spec

Schema source

Pulled the typed schema from the installed plugin SDK at ~/.nvm/.../openclaw/dist/plugin-sdk/src/agents/skills/types.d.ts:

```typescript
type OpenClawSkillMetadata = {
always?: boolean; skillKey?: string; primaryEnv?: string;
emoji?: string; homepage?: string; os?: string[];
requires?: { bins?: string[]; anyBins?: string[]; env?: string[]; config?: string[] };
install?: SkillInstallSpec[];
};
```

Skipped primaryEnv (project `skills/CLAUDE.md` forbids in favor of `apiKey.env`) and requires.env (avoids ambiguity about whether it gates eligibility — apiKey.env already documents env requirements).

Test plan

• All 24 SKILL.md files parse as valid YAML
• `uv run --with pytest --with pyyaml --with httpx pytest tests/ -v` → 184 passed, 50 skipped (API keys unavailable, expected)
• `git diff` confirms no field deletions (only version-string removals from version bumps)
• Roll out to fleet starting with Cora; verify all skills load
• Verify Julianna/Ace deployment

🤖 Generated with Claude Code

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