Cerberus blocks the lethal trifecta at the tool boundary — see the 525-run evidence set.

Warden · Agentic Assurance

An agent's memory is a database that accepts writes from strangers

An audit of what your agents remember, retrieve and treat as trusted — and whether a single poisoned document can shape decisions long after it was ingested.

Retrieval turns yesterday's content into today's instruction

Vector stores and long-lived agent memory are usually populated from sources with mixed trust, then read back without any record of where a given claim originated.

  1. Ingestion is rarely authenticatedContent is indexed because it was reachable, not because it was vetted.
  2. Provenance is dropped at retrievalThe chunk that reaches the model usually arrives without its origin, so the agent cannot weigh it.
  3. Poisoning persistsUnlike a prompt injection, a poisoned memory keeps influencing behavior across sessions and users.

How the audit runs

1

Map the corpus

Every source feeding retrieval or memory, and the trust level each one actually warrants.

2

Trace provenance

Follow a sample of retrieved content back to origin and record where the lineage breaks.

3

Test with seeded content

Introduce marked benign content into the ingestion path and observe whether and how it later influences output.

4

Recommend controls

Source segregation, provenance retention at retrieval, and detection for the paths that cannot be closed.

What you hold at the end

  • A source map of everything feeding memory and retrieval, with trust classification
  • Findings on where provenance is lost between ingestion and generation
  • Seeded-content results showing which ingestion paths reach production answers
  • A control plan covering segregation, provenance retention and detection

Related products

Mimir is the research line behind this work. It is in preview and not generally available, so the engagement delivers the audit and the controls, not a Mimir deployment.

Know where the answer came from

An agent that cannot tell you the origin of a claim cannot be governed on the strength of that claim.