droidcli writes all of its persisted runtime data here:

• droidcli_memory.sqlite3 - the durable agent-turn history (MemoryStore, see cli/memory_store.cpp) behind GET /api/agent/history and GET /api/agent/sessions. Every message in every agent-turn session lives here, so conversations survive a restart.
• droidcli_state.json - runtime-registered connectors (via POST /api/connectors or the agent, not --config), saved on clean exit and reloaded on the next start. Same shape as --config's connectors file; see "State persistence" in AGENTS.md.
• droidcli_last_session.json - which agent-turn session the TUI was last on, so it resumes the same conversation instead of starting a new one on the next launch (cli/tui.cpp).

Created automatically on startup if missing (DroidHost::initialize()). Everything in this directory except this file is git-ignored - it's local runtime data, not source, and none of it should ever be pushed to GitHub.