Initial commit: Hermes Agent skills collection

- Trading skills (OKX, dividend, lottery, quantitative)
- Creative skills (ASCII art, diagrams, video)
- Development skills (GitHub, debugging, TDD)
- Research skills (arXiv, blog monitoring)
- Productivity skills (email, documents, notes)
- MCP integration skills
- Custom user skills

trading/longbridge-python-sdk/references/error-codes.md

@@ -0,0 +1,21 @@
+# LongPort API Error Codes
+
+## Authentication Errors
+| Code | Meaning | Fix |
+|------|---------|-----|
+| 401004 | Token invalid | Token truncated/expired. Check bashrc has full token (1053 chars). Use Python to parse bashrc directly, don't rely on `source`. |
+| 403201 | Auth failed | Similar to 401004 — token masking by terminal tool. Use `execute_code` + SDK instead of CLI. |
+
+## Geo-Restriction Errors
+| Code | Meaning | Fix |
+|------|---------|-----|
+| 602315 | Mainland China regulatory block | API detects mainland China IP. Must use VPN (HK/US/etc). Read-only may still work; trading is blocked. |
+
+## Trading Errors
+| Code | Meaning | Fix |
+|------|---------|-----|
+| 301607 | Too many k-lines requested | Max ~1000 per `candlesticks()` call. Use `history_candlesticks_by_offset()` for pagination. |
+
+## Common Error Patterns
+- **401004 + 602315**: Both appeared in same session. 401004 was from truncated token in .env, 602315 after token was fixed (real token loaded from bashrc).
+- **Token "..." truncation**: bashrc shows `m_eyJh...jb-k` in grep output even when full 1053-char token exists. The `...` is just display truncation by the shell/terminal, not in the actual file. Use `python3 -c "import os; ..."` to verify real length.