# Theo · Stealth (Zero Retention)

> Theo Stealth is the zero-retention, low-filter surface. No memory writes, no skill injection, no audit-grade content storage. For requests that must not leave a trace.

Source of truth: https://hitheo.ai. Last updated: 2026-05-24.

## At a glance
- Branded engines: theo-1-stealth (text), theo-1-stealth-create (image), theo-1-stealth-motion (video).
- Branded image sub-engines: Theo Dream, Theo Dream Lite, Theo Raw, Theo Chroma, Theo Unbound, Theo Ink.
- Branded edit sub-engines: Theo Ink Edit, Theo Dream Edit, Theo Dream Lite Edit.
- Branded video sub-engines: Theo Motion Uncensored, Theo Animate, Theo Animate Pro, Theo Ovi.
- Zero retention: no memory writes, no audit content storage, no skill injection.
- Watermark: every Theo Stealth Motion mp4 carries the same AI-disclosure wordmark as Theo Motion. The watermark is a provenance signal, not a branding choice.

## When to use Stealth
- A creative exploration that must not pollute the customer's memory graph.
- A safety / red-team probe where you do not want audit-storable content.
- A request that requires a less restrictive content filter than the conversational engines apply.

## When NOT to use Stealth
- Anything that benefits from MCIR memory continuity. Stealth turns are not recorded in the memory graph.
- Customer-facing AI Worker turns. Skill prompt extensions, knowledge files, and routing rules are all skipped in Stealth.

## API
- Body fields: stealth_model (one of the branded engine ids; "auto" lets the routing engine pick within the family), stealth_aspect (square / portrait / landscape / wide), stealth_duration (per-engine allowed values).
- The orchestrator strips skill injection and memory writes when any mode starts with "stealth_".
- Routing engine respects the stealth family: even if the routing engine promotes a stealth_fast caller to image / video, the result stays in the stealth family.

## Related machine-readable files
- https://hitheo.ai/llms.txt — full index of every Theo machine-readable file.
- https://hitheo.ai/llms-full.txt — long-form knowledge bundle (single fetch).
- https://hitheo.ai/humans.txt — team and open-source credits.
- https://hitheo.ai/lawyers.txt — trademark notice and legal contact.
- https://hitheo.ai/.well-known/security.txt — security disclosure contact.