CSL
Definition
The app-facing middleware that implements Compute Sponsoring: it brokers decisions, enforces policy and data minimization, and produces proof for settlement.
CS, CSL, and CSI
Compute Sponsoring is the standard proposal; CSL and CSI are implementation layers:
- CS: the open standard proposal (rules + profiles).
- CSL: the middleware layer addressed by the API.
- CSI: the proof/audit subsystem inside the CSL.
Responsibilities
The CSL focuses on a narrow set of runtime responsibilities:
- Decision brokering: request in, decision out, creative returned to the app.
- Policy enforcement: data minimization + blocking rules before any market call.
- Proof + settlement: every billed slot is backed by signed evidence.
Failure behavior
If the CSL is unavailable or cannot validate a request, the model response proceeds and the slot becomes a no-fill. See Safety.
Related
Last updated: 2026-04-20