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/goose.ai.toml

@@ -0,0 +1,51 @@
+# Schema defined in agent_schema.py
+# https://github.com/block/goose
+
+identity = "goose.ai"
+name = "Goose"
+short_name = "goose"
+url = "https://block.github.io/goose/"
+protocol = "acp"
+author_name = "Block"
+author_url = "https://block.xyz/"
+publisher_name = "Will McGugan"
+publisher_url = "https://willmcgugan.github.io/"
+type = "coding"
+description = "An open source, extensible AI agent that goes beyond code suggestions - install, execute, edit, and test with any LLM."
+tags = []
+run_command."*" = "goose acp"
+
+help = '''
+# Goose 🪿
+
+**An open source, extensible AI agent**
+
+Goose is an open framework for AI agents that goes beyond code suggestions to install dependencies, execute commands, edit files, and run tests.
+
+## Key Features
+
+- **Extensible Framework**: Plugin-based architecture for custom tools and behaviors
+- **Multi-LLM Support**: Works with various LLM providers
+- **Agent Client Protocol (ACP)**: Native ACP support for editor integration
+- **Multiple Interfaces**: CLI, and ACP server modes
+
+## Configuration
+
+You can override ACP configurations using environment variables:
+- `GOOSE_PROVIDER`: Set your preferred LLM provider
+- `GOOSE_MODEL`: Specify the model to use
+
+---
+
+**Documentation**: https://block.github.io/goose/docs/guides/acp-clients/  
+**GitHub**: https://github.com/block/goose  
+**Quickstart**: https://block.github.io/goose/docs/quickstart/
+'''
+
+[actions."*".install]
+command = "curl -fsSL https://github.com/block/goose/releases/download/stable/download_cli.sh | bash"
+description = "Install Goose"
+
+[action."*".update]
+command = "Update Goose"
+description = "Update Goose"