Hy Memory vs LocalGhost

Hy Memory

An Apache-2.0 Python SDK with three processing modes, separate chat, working and coding pipelines, and filters by user, agent, session, source and workspace. Deletion does not stick everywhere. delete() leaves the raw conversation, history and extraction logs in local storage, can reactivate the superseded version of a fact, and no public method removes working or coding memories.

LocalGhost

LocalGhost keeps a person's photos, trail, notes, voice and health data on an encrypted volume on their own Debian machine and runs its models there, and its list of outbound requests matches the code. It's pre-1.0 at wisp 0.0.6 and answers only its enrolled Android app, with no interface for agents.

Hy Memory

1. Pass user_id on every add() and user_ids on every search(). Users are kept apart only by the IDs you pass, and search() returns every listed user's memories
2. Choose the mode before writing. lite makes no LLM calls and stores raw text. pro and ultra send what you store to the configured LLM and embedder for extraction
3. Don't rely on delete() to erase a fact. The raw conversation, history.db and cache.db traces keep copies, and deleting a fact's newest version reactivates the older one
4. Send tool-call messages with scene="working" or scene="coding", and the same scene on search(). Without tool messages a write falls back to chat memory
5. Keep python -m hy_memory.server on 127.0.0.1. It has no authentication and allows any web origin

LocalGhost

1. Don't look for an API or MCP server. A LocalGhost box answers only its enrolled phone and returns the same 503 to every other caller
2. Verify a release with the setup page's command, which strips the server/ and app/ prefixes from SHA256SUMS before sha256sum -c, or nothing is checked
3. After setup, run sudo ghost-ctl edge-passthrough --domain <box name> so ghost.secd checks the device certificate itself
4. Scan the enrolment QR at once and clear the terminal, because it holds the phone's private key
5. Install from the v0.0.6 release, which main pins