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

skills/community/dyad/multi-pr-review/references/issue_schema.md

@@ -0,0 +1,115 @@
+# Issue Output Schema
+
+JSON schema for the structured issue output from sub-agents.
+
+## Schema
+
+```json
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "array",
+  "items": {
+    "type": "object",
+    "required": [
+      "file",
+      "line_start",
+      "severity",
+      "category",
+      "title",
+      "description"
+    ],
+    "properties": {
+      "file": {
+        "type": "string",
+        "description": "Relative path to the file containing the issue"
+      },
+      "line_start": {
+        "type": "integer",
+        "minimum": 1,
+        "description": "Starting line number of the issue"
+      },
+      "line_end": {
+        "type": "integer",
+        "minimum": 1,
+        "description": "Ending line number (defaults to line_start if single line)"
+      },
+      "severity": {
+        "type": "string",
+        "enum": ["HIGH", "MEDIUM", "LOW"],
+        "description": "Criticality level of the issue"
+      },
+      "category": {
+        "type": "string",
+        "enum": [
+          "security",
+          "logic",
+          "performance",
+          "error-handling",
+          "style",
+          "other"
+        ],
+        "description": "Category of the issue"
+      },
+      "title": {
+        "type": "string",
+        "maxLength": 100,
+        "description": "Brief, descriptive title for the issue"
+      },
+      "description": {
+        "type": "string",
+        "description": "Detailed explanation of the issue and its impact"
+      },
+      "suggestion": {
+        "type": "string",
+        "description": "Optional suggestion for how to fix the issue"
+      }
+    }
+  }
+}
+```
+
+## Example Output
+
+```json
+[
+  {
+    "file": "src/auth/login.py",
+    "line_start": 45,
+    "line_end": 48,
+    "severity": "HIGH",
+    "category": "security",
+    "title": "SQL injection vulnerability in user lookup",
+    "description": "User input is directly interpolated into SQL query without parameterization. An attacker could inject malicious SQL to bypass authentication or extract data.",
+    "suggestion": "Use parameterized queries: cursor.execute('SELECT * FROM users WHERE username = ?', (username,))"
+  },
+  {
+    "file": "src/utils/cache.py",
+    "line_start": 112,
+    "line_end": 112,
+    "severity": "MEDIUM",
+    "category": "error-handling",
+    "title": "Missing exception handling for cache connection failure",
+    "description": "If Redis connection fails, the exception propagates and crashes the request handler. Cache failures should be handled gracefully with fallback to direct database queries.",
+    "suggestion": "Wrap cache operations in try/except and fall back to database on failure"
+  }
+]
+```
+
+## Consensus Output
+
+After aggregation, issues include additional metadata:
+
+```json
+{
+  "file": "src/auth/login.py",
+  "line_start": 45,
+  "line_end": 48,
+  "severity": "HIGH",
+  "category": "security",
+  "title": "SQL injection vulnerability in user lookup",
+  "description": "...",
+  "suggestion": "...",
+  "consensus_count": 3,
+  "all_severities": ["HIGH", "HIGH", "MEDIUM"]
+}
+```