# Lethe Delete

> Provable data-subject deletion for AI memory. On a GDPR/CCPA "delete me" request, Lethe Delete removes a person from your vector store, RAG index, and caches; re-queries to confirm the embeddings are absent; and emits an Ed25519-signed, tamper-evident deletion certificate. Open-source (Apache-2.0), self-hosted, MCP-ready for AI agents.

## What it does
- Removes a data subject across your configured retrieval layers: vector stores (Postgres/pgvector, Pinecone), RAG indexes, and caches.
- Re-queries after deletion to confirm the records and embeddings are absent.
- Emits a signed, tamper-evident certificate stating what was deleted, when, and that it was verified absent at issue time.
- Tag-on-write: wrap your store once and every write tags itself, so a later `forget(subject)` finds and deletes everything — nothing to remember later.

## Honest scope (do not overstate)
- The certificate proves absence from your CONFIGURED retrieval layers AT ISSUE TIME — not backups, not model weights, not read replicas.
- For eventually-consistent stores (e.g. Pinecone), `verified_absent` reflects a re-query at issue time against the configured endpoint, not a guarantee across replicas.
- A self-signed certificate proves self-consistency; independent third-party attestation is a separate layer.
- Early and pre-revenue. Lethe Delete is a tool that helps you prove deletion — it is not a compliance guarantee and does not guarantee an outcome.

## For AI agents (machine-to-machine)
- Ships an MCP server over stdio (no remote/HTTP MCP today). Six tools; the destructive `forget` is two-step: `forget_preview` returns the blast radius plus a single-use confirm token, and `forget` runs only if the data still matches the preview.
- Verify-only mode: any agent can verify a deletion certificate with no database access, against the operator's pinned public key.

## Install
- `pip install lethe-delete` (the import stays `lethe`; CLI: `lethe` and `lethe-mcp`).

## Connectors
- Postgres/pgvector and Pinecone connectors, plus a LangChain integration. No LlamaIndex connector yet.

## Links
- Site: https://lethe-delete.com
- Verify a certificate: https://lethe-delete.com/verify
- Source (Apache-2.0): https://github.com/bluetieroperations-create/lethe
- Open benchmark "Can Your AI Forget?": https://github.com/bluetieroperations-create/can-your-ai-forget
- Package: https://pypi.org/project/lethe-delete
- Maintainer: BlueTier Operations — bluetier.operations@gmail.com