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/fix-issue/scripts/goldens/details_summary_input.md

@@ -0,0 +1,22 @@
+# Bug Report
+
+<details>
+<summary>Click to expand logs</summary>
+
+Error log content here:
+
+```
+ERROR: Something went wrong
+Stack trace follows
+```
+
+</details>
+
+## More Info
+
+Additional context.
+
+<details open>
+<summary>Open by default</summary>
+This is expanded by default.
+</details>

skills/community/dyad/fix-issue/scripts/goldens/details_summary_output.md

@@ -0,0 +1,17 @@
+# Bug Report
+
+Click to expand logs
+
+Error log content here:
+
+```
+ERROR: Something went wrong
+Stack trace follows
+```
+
+## More Info
+
+Additional context.
+
+Open by default
+This is expanded by default.

skills/community/dyad/fix-issue/scripts/goldens/excessive_whitespace_input.md

@@ -0,0 +1,11 @@
+# Issue Title
+
+Too many blank lines above.
+
+And here too.
+
+## Section
+
+Content with trailing spaces
+
+More content.

skills/community/dyad/fix-issue/scripts/goldens/excessive_whitespace_output.md

@@ -0,0 +1,11 @@
+# Issue Title
+
+Too many blank lines above.
+
+And here too.
+
+## Section
+
+Content with trailing spaces
+
+More content.

skills/community/dyad/fix-issue/scripts/goldens/html_comments_input.md

@@ -0,0 +1,19 @@
+# Bug Report
+
+<!-- This is a hidden comment that should be removed -->
+
+There's a bug in the login flow.
+
+<!--
+Multi-line comment
+that spans several lines
+and should also be removed
+-->
+
+## Steps to Reproduce
+
+1. Go to login page
+2. Enter credentials
+3. Click submit
+
+<!-- TODO: Add more details -->

skills/community/dyad/fix-issue/scripts/goldens/html_comments_output.md

@@ -0,0 +1,9 @@
+# Bug Report
+
+There's a bug in the login flow.
+
+## Steps to Reproduce
+
+1. Go to login page
+2. Enter credentials
+3. Click submit

skills/community/dyad/fix-issue/scripts/goldens/invisible_chars_input.md

@@ -0,0 +1,9 @@
+# Feature Request
+
+This​ text has zero​-width spaces hidden​ in it.
+
+And some other invisible characters like ​ and ‌ and ‍.
+
+## Description
+
+Normal text here.

skills/community/dyad/fix-issue/scripts/goldens/invisible_chars_output.md

@@ -0,0 +1,9 @@
+# Feature Request
+
+This text has zero-width spaces hidden in it.
+
+And some other invisible characters like and and .
+
+## Description
+
+Normal text here.

skills/community/dyad/fix-issue/scripts/goldens/mixed_input.md

@@ -0,0 +1,26 @@
+# Complex Issue
+
+<!-- Hidden metadata: priority=high -->
+
+This​ issue has multiple problems.
+
+<details>
+<summary>Stack trace</summary>
+
+```
+Error at line 42
+  at foo()
+  at bar()
+```
+
+</details>
+
+## Steps to Reproduce
+
+<!-- TODO: verify these steps -->
+
+1. Do thing A
+2. Do thing B
+3. See error
+
+<!-- End of issue -->

skills/community/dyad/fix-issue/scripts/goldens/mixed_output.md

@@ -0,0 +1,17 @@
+# Complex Issue
+
+This issue has multiple problems.
+
+Stack trace
+
+```
+Error at line 42
+  at foo()
+  at bar()
+```
+
+## Steps to Reproduce
+
+1. Do thing A
+2. Do thing B
+3. See error