chore: backup before migration to new repo

AGENTS.md

@@ -182,6 +182,15 @@ src/
 ### Server
 - `MOMENTRY_SERVER_PORT` - API server port (default: `3002` for production, `3003` for playground)
 - `MOMENTRY_REDIS_PREFIX` - Redis key prefix (default: `momentry:` for production, `momentry_dev:` for playground)
+- `MOMENTRY_API_KEY` - API key for Player online mode testing
+
+### Testing API Key
+```bash
+export MOMENTRY_API_KEY="muser_68600856036340bcafc01930eb4bd839_1774418104_97221b69"
+
+# Test Player online mode
+cargo run --features player --bin momentry_player -- -o
+```
 
 ### Database
 - `DATABASE_URL` - PostgreSQL (default: `postgres://accusys@localhost:5432/momentry`)
@@ -201,6 +210,10 @@ src/
 - `MOMENTRY_CUT_TIMEOUT` - CUT timeout in seconds (default: 3600)
 - `MOMENTRY_DEFAULT_TIMEOUT` - Default timeout (default: 7200)
 
+### Synonym Expansion
+- `MOMENTRY_SYNONYM_FILES` - Comma-separated paths to synonym JSON files (e.g., `data/english_synonyms.json,data/llm_synonyms.json`)
+- `MOMENTRY_SYNONYM_FILE` - Single synonym JSON file path (deprecated, use above)
+
 ### Logging
 - `RUST_LOG` or `MOMENTRY_LOG_LEVEL` - Log level (default: `info`)
 
@@ -213,6 +226,23 @@ src/
 - PythonExecutor provides unified script execution with timeout support
 - Redis 1.0.x for improved performance
 
+### LLM Synonym Generation
+
+Generate synonym database using llama.cpp (Gemma4):
+
+```bash
+# Generate full database (162 entries, ~5 minutes)
+python3 scripts/generate_synonyms_llamacpp.py
+
+# Quick test
+python3 scripts/generate_synonyms_llamacpp.py --test
+
+# Resume from existing file
+python3 scripts/generate_synonyms_llamacpp.py --resume
+
+# Output: data/llm_synonyms.json (27 Chinese + 135 English words)
+```
+
 ## Task Management
 
 ### 使用 todowrite 追蹤任務