# Runtime Profiles

A RuntimeEnvironment identifies installed executable software: adapter, exact runtime and package
versions, Python/CUDA versions, supported architectures/formats/modalities and container repository
plus digest. It is immutable after registration.

A RuntimeProfile binds one exact ArtifactSet to one RuntimeEnvironment and execution configuration:
dtype, quantization, modality, sequence length, batch, concurrency, device/GPU-memory policies,
non-secret environment values, launch parameters and layered health contract. Its canonical
fingerprint makes identical creates idempotent. Any behavior-changing update is a new profile,
never an in-place mutation.

`trust_remote_code=false` and `network_egress=false` are literal schema constraints. Environment
variable names containing token, secret, password, key or credential are rejected. Runtime Profiles
contain configuration only; node credentials and hub/project secrets are not part of the object.