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/inference.huggingface.co.toml

@@ -0,0 +1,44 @@
+# Schema defined in agent_schema.py
+
+active = true
+identity = "inference.huggingface.co"
+name = "Hugging Face Inference Providers"
+short_name = "hf"
+url = "https://huggingface.co"
+protocol = "acp"
+author_name = "Hugging Face"
+author_url = "https://huffingface.co"
+publisher_name = "Hugging Face"
+publisher_url = "https://huffingface.co"
+type = "chat"
+description = """
+Use the latest open weight models and skills with HF Inference Providers. Create an account at Hugging Face and register with [b]toad-hf-inference-explorers[/] for [bold $success]$20[/] of free credit!"""
+tags = []
+run_command."*" = "hf-inference-acp -x"
+
+help = '''
+# Hugging Face Inference Providers
+
+Chat with the latest open weight models using Hugging Face inference providers.
+
+--- 
+
+Create an account at huggingface.co/join and register with [Toad Explorers](https://huggingface.co/toad-hf-inference-explorers) for **$20** of free credit!
+'''
+
+
+welcome = '''
+# Hugging Face 🤗
+
+Use `ctrl+o` to enter Setup mode and type `go` to change settings.
+
+Use `/skills` to manage and install skills.
+
+Join the community at [Toad Hf Inference Explorers](https://huggingface.co/toad-hf-inference-explorers)
+'''
+
+recommended = true
+
+[actions."*".install]
+command = "uv tool install -U hf-inference-acp --with-executables-from huggingface_hub --force"
+description = "Install Hugging Face Inference Providers"