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Deterministic Steering Engine Harness

Status: mock-only validation surface.

Purpose

The deterministic steering engine harness proves the request parsing, hook descriptor construction, baseline pass, transformed pass, and response-shape wiring without loading model weights or SAE tensors.

Validation command

scripts/run-mock-steering.py /tmp/agent-machine-steer-request.json --pretty

The validation path requires:

  • baseline and transformed outputs differ
  • request feature, layer, and strength fields are preserved
  • 6-res-jb maps to hook name blocks.6.hook_resid_pre
  • the returned shape is compatible with Noetica's steering result contract

Boundary

This harness does not:

  • load GPT-2 Small
  • load SAE artifacts
  • run real inference
  • inject a real activation vector
  • claim local runtime readiness

The real activation path must use the same request and response shape after the receipt, loader, policy, and grant gates are satisfied.