Shared Schemas & Multi-Session

# Two sessions share the default schema — memory is shared
await loom.build("I'm Alice, I work at OpenAI", session_id="session_a")
reply = await loom.chat("Where do I work?", session_id="session_b")
# reply uses memory from session_a because both use schema_id="default"

# Backup current schema and start fresh
result = loom.new_schema(session_id="session_a")
print(result)  # {"backup_id": "default_20260312_143000", "schema_id": "default"}

# Use a previously backed-up schema
loom.switch_session_schema("session_b", "default_20260312_143000")

# Check which schema a session uses
schema_id = loom.get_session_schema_id("session_a")  # "default"

curl -X POST "http://localhost:8666/api/sessions?session_id=bob&schema_id=bob_schema"

# Backup current schema and start fresh
curl -X POST http://localhost:8666/api/schemas/new \
  -H "Content-Type: application/json" \
  -d '{"session_id": "alice"}'

# List saved schema files and backups
curl http://localhost:8666/api/schemas/saved
curl http://localhost:8666/api/schemas/backups

# Switch a session to a different schema
curl -X POST http://localhost:8666/api/schemas/switch \
  -H "Content-Type: application/json" \
  -d '{"session_id": "alice", "target_schema_id": "default_20260312_143000"}'

# Restore a backup
curl -X POST http://localhost:8666/api/schemas/restore \
  -H "Content-Type: application/json" \
  -d '{"backup_id": "default_20260312_143000"}'

schemas/
├── default.json                      # Active schema file
└── backups/
    └── default_20260312_143000.json  # Timestamped backup

persistence:
  schemas_dir: "./schemas"