Add community skills, agents, system prompts from 22+ sources

Community Skills (32):
- jat: jat-start, jat-verify, jat-complete
- pi-mono: codex-cli, codex-5.3-prompting, interactive-shell
- picoclaw: github, weather, tmux, summarize, skill-creator
- dyad: 18 skills (swarm-to-plan, multi-pr-review, fix-issue, lint, etc.)
- dexter: dcf valuation skill

Agents (23):
- pi-mono subagents: scout, planner, reviewer, worker
- toad: 19 agent configs (Claude, Codex, Gemini, Copilot, OpenCode, etc.)

System Prompts (91):
- Anthropic: 15 Claude prompts (opus-4.6, code, cowork, etc.)
- OpenAI: 49 GPT prompts (gpt-5 series, o3, o4-mini, tools)
- Google: 13 Gemini prompts (2.5-pro, 3-pro, workspace, cli)
- xAI: 5 Grok prompts
- Other: 9 misc prompts (Notion, Raycast, Warp, Kagi, etc.)

Hooks (9):
- JAT hooks for session management, signal tracking, activity logging

Prompts (6):
- pi-mono templates for PR review, issue analysis, changelog audit

Sources analyzed: jat, ralph-desktop, toad, pi-mono, cmux, pi-interactive-shell,
craft-agents-oss, dexter, picoclaw, dyad, system_prompts_leaks, Prometheus,
zed, clawdbot, OS-Copilot, and more

agents/community/toad/stakpak.dev.toml

@@ -0,0 +1,61 @@
+# Schema defined in agent_schema.py
+# https://github.com/stakpak/agent
+
+identity = "stakpak.dev"
+name = "Stakpak Agent"
+short_name = "stakpak"
+url = "https://stakpak.dev/"
+protocol = "acp"
+author_name = "Stakpak"
+author_url = "https://stakpak.dev/"
+publisher_name = "Will McGugan"
+publisher_url = "https://willmcgugan.github.io/"
+type = "coding"
+description = "Terminal-native DevOps Agent in Rust with enterprise-grade security, ACP support, and IaC generation capabilities."
+tags = []
+run_command."*" = "stakpak acp"
+
+help = '''
+# Stakpak Agent
+
+**The most secure agent built for operations & DevOps**
+
+Stakpak is a terminal-native DevOps Agent built in Rust with enterprise-grade security features and Agent Client Protocol support.
+
+## Key Features
+
+- **Enterprise-Grade Security**: 
+  - Mutual TLS (mTLS) encryption
+  - Dynamic secret redaction
+  - Privacy-first architecture
+- **DevOps Capabilities**: Run commands, edit files, search docs, and generate high-quality IaC
+- **Agent Client Protocol (ACP)**: Native support for editor integration
+- **Rust Performance**: Built in Rust for speed and reliability
+
+## ACP Integration
+
+Stakpak implements the Agent Client Protocol, enabling integration with ACP-compatible editors and development environments like Zed, Neovim, and others.
+
+## Security
+
+Stakpak emphasizes security with:
+- End-to-end encryption via mTLS
+- Automatic detection and redaction of sensitive information
+- Privacy-first design principles
+
+## Use Cases
+
+- Infrastructure as Code (IaC) generation
+- DevOps automation
+- Secure operations in production environments
+- Terminal-based development workflows
+
+---
+
+**GitHub**: https://github.com/stakpak/agent  
+**Website**: https://stakpak.dev/
+'''
+
+[actions."*".install]
+command = "cargo install stakpak"
+description = "Install Stakpak Agent via Cargo"