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

prompts/community/pi-mono/is.md

@@ -0,0 +1,23 @@
+---
+description: Analyze GitHub issues (bugs or feature requests)
+---
+Analyze GitHub issue(s): $ARGUMENTS
+
+For each issue:
+
+1. Read the issue in full, including all comments and linked issues/PRs.
+2. Do not trust analysis written in the issue. Independently verify behavior and derive your own analysis from the code and execution path.
+
+3. **For bugs**:
+   - Ignore any root cause analysis in the issue (likely wrong)
+   - Read all related code files in full (no truncation)
+   - Trace the code path and identify the actual root cause
+   - Propose a fix
+
+4. **For feature requests**:
+   - Do not trust implementation proposals in the issue without verification
+   - Read all related code files in full (no truncation)
+   - Propose the most concise implementation approach
+   - List affected files and changes needed
+
+Do NOT implement unless explicitly asked. Analyze and propose only.