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)

README.md

@@ -0,0 +1,39 @@
+# Vigilio's Dotfiles
+
+Pi configuration files — agents, skills, prompts, settings.
+
+## Structure
+
+```
+.pi/agent/
+  agents/        # Agent definitions (Vigilio, A-Team members, utility agents)
+  prompts/       # Multi-agent prompt configurations (A-Team missions)
+  skills/        # Progressive-disclosure skill files
+    forgejo/     # Forgejo CLI and API reference
+    napkin/      # (managed by napkin-ai npm package, not here)
+    senior-software-engineer/
+    xai-docs/
+  settings.json  # Pi settings (provider, model defaults)
+```
+
+## What's NOT here
+
+- `~/.pi/agent/AGENTS.md` → symlink to `~/.napkin/NAPKIN.md` (vault-tracked)
+- `~/.pi/agent/auth.json` → credentials, never commit
+- `~/.pi/agent/models.json` → dynamically generated, not tracked
+- `~/.pi/agent/sessions/` → runtime data
+
+## Restore
+
+After fresh pi install:
+```bash
+cp -r dotfiles/.pi/agent/agents/* ~/.pi/agent/agents/
+cp -r dotfiles/.pi/agent/prompts/* ~/.pi/agent/prompts/
+cp -r dotfiles/.pi/agent/skills/* ~/.pi/agent/skills/
+cp dotfiles/.pi/agent/settings.json ~/.pi/agent/settings.json
+```
+
+Then re-symlink AGENTS.md:
+```bash
+ln -sf ~/.napkin/NAPKIN.md ~/.pi/agent/AGENTS.md
+```