Gateway Mock Provider

Sprint E includes one executable provider: mock.

Mock models:

• mock-chat
• mock-tools
• mock-stream

The mock provider is deterministic and local-only:

• no network access
• no provider credentials
• no API keys
• no SDKs
• no local model engine probing
• no external requests

Chat Behavior

Basic chat requests return a fixed assistant response:

mock response

Tool requests against mock-tools return a deterministic mock tool-call shape.

metadata.mode = "error" produces a normalized mock upstream error for error-path testing.

Prompt text is not echoed in diagnostics by default.

Client Validation

Sprint F uses this mock provider for client plan validation. Passing a Sprint F compatibility test means the generated plan works against the local mock protocol; it does not mean a named third-party client was installed or executed.

Sprint G provider-health snapshots are execution-backed only for this mock provider. External providers remain metadata-only and are not probed.