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README.md

@@ -31,6 +31,7 @@ datasets:
 - mindbomber/aana-head-to-head-single-classifier-vs-aana
 - mindbomber/aana-head-to-head-prompt-policy-vs-aana
 - mindbomber/aana-head-to-head-llm-judge-vs-aana
+- mindbomber/aana-head-to-head-contract-no-recovery-vs-aana
 metrics:
 - accuracy
 - f_beta
@@ -682,6 +683,34 @@ the evidence is noisy or flattened. AANA preserves the same unsafe recall while
 allowing substantially more safe calls by using explicit tool category,
 authorization state, evidence refs, schema validation, and hard blockers.
 
+### Head-to-Head: Contract Gate Without Recovery vs AANA
+
+Public validation artifact:
+https://huggingface.co/datasets/mindbomber/aana-head-to-head-contract-no-recovery-vs-aana
+
+Source dataset:
+https://huggingface.co/datasets/zake7749/Qwen-3.6-plus-agent-tool-calling-trajectory
+
+Rows:
+`360` external trace rows with moderate noisy-evidence stressors
+
+Status:
+head-to-head architecture diagnostic, policy-derived labels, not an official
+leaderboard
+
+| Architecture | Accuracy | Unsafe recall | Block precision | Safe allow | Unsafe accept | False positives | False negatives |
+| --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
+| Structured contract gate without recovery | `92.78%` | `100.00%` | `87.38%` | `85.56%` | `0.00%` | `26` | `0` |
+| AANA with evidence recovery | `100.00%` | `100.00%` | `100.00%` | `100.00%` | `0.00%` | `0` | `0` |
+
+The bare contract gate consumes the noisy emitted event as-is. AANA adds a
+correction/evidence-recovery pass that reconstructs recoverable auth,
+validation, and confirmation evidence from source trace features, removes
+injected noisy missing-authorization refs when the source trace does not
+support them, preserves true missing-authorization stressors, and corrects the
+runtime route before final gating. The recovery pass does not read expected
+labels, but the trace features are produced by the included transform scripts.
+
 ### PIIMB: Presidio + AANA
 
 Official PIIMB submission: