initial: pi config — agents, prompts, skills, settings

Captures:
- 12 agent definitions (vigilio + a-team + utility)
- 8 mission prompt configurations
- 3 skills (forgejo, senior-software-engineer, xai-docs)
- pi settings.json (default provider/model)

.pi/agent/skills/xai-docs/SKILL.md

@@ -0,0 +1,51 @@
+---
+name: xai-docs
+description: Query x.ai (Grok) documentation directly from any agent session. Use when working with x.ai APIs, Grok models, rate limits, function calling, or any x.ai-specific feature. Wraps the x.ai JSON-RPC docs endpoint via the xai-docs CLI tool.
+---
+
+# x.ai Docs Tool
+
+Query x.ai documentation without leaving your session. Available as the `xai-docs` CLI tool (on PATH).
+
+## Commands
+
+```bash
+# Search docs for a keyword or phrase
+xai-docs search "rate limits"
+xai-docs search "function calling" 10   # return up to 10 results (default: 5)
+
+# Get a specific doc page by slug
+xai-docs page "developers/quickstart"
+xai-docs page "developers/models"
+xai-docs page "developers/advanced-api-usage/batch-api"
+
+# List all available page slugs
+xai-docs list
+```
+
+## Common Slugs
+
+| Topic | Slug |
+|-------|------|
+| Models + pricing | `developers/models` |
+| Quickstart | `developers/quickstart` |
+| Function calling | `developers/function-calling` |
+| Batch API | `developers/advanced-api-usage/batch-api` |
+| Async API | `developers/advanced-api-usage/async` |
+| Rate limits | search for "rate limits" or check `developers/models` |
+| Billing | `console/billing` |
+
+## When to Use
+
+- Before implementing x.ai API calls — check current model IDs, pricing, rate limits
+- When hitting errors — search for the error type or feature
+- When comparing Grok models — `xai-docs page "developers/models"` gives the full table
+- When working on x.ai provider config — check available endpoints and auth format
+
+## Notes
+
+- No auth required — public endpoint
+- Returns markdown content
+- The `search` command returns excerpts with page slugs — use `page` to get the full content
+- `list` returns all ~30+ page slugs if you want to browse
+- Endpoint: `https://docs.x.ai/api/mcp` (JSON-RPC, stateless)