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The Safety Harness Learned From Its Own Failures

SHE turns failed agent trajectories into targeted revisions of prompts, rules, memory and tool policy.

Published Updated Story ID: mp-2026-08-11-004
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Summary

SHE turns failed agent trajectories into targeted revisions of prompts, rules, memory and tool policy.

Safety Harness Evolution divides an agent harness into four accountable artifacts, diagnoses rollout failures and applies localized boundary changes only after safety-versus-utility checks. On Agent-SafetyBench, the authors report a 3.1-fold reduction in attack success compared with a static SafeHarness, alongside improved benign utility. They also report transfer to held-out risks and other agent models. The evidence is benchmark-based preprint work, not a production security guarantee.

Why it matters

SHE turns failed agent trajectories into targeted revisions of prompts, rules, memory and tool policy.

Limits and context

  • Safety Harness Evolution divides an agent harness into four accountable artifacts, diagnoses rollout failures and applies localized boundary changes only after safety-versus-utility checks.
  • The evidence is benchmark-based preprint work, not a production security guarantee.

Key claims

  1. SHE turns failed agent trajectories into targeted revisions of prompts, rules, memory and tool policy.

    Qualification: Safety Harness Evolution divides an agent harness into four accountable artifacts, diagnoses rollout failures and applies localized boundary changes only after safety-versus-utility checks.

    Evidence: source-2026-08-11-004

Sources

  1. arXiv preprint 2608.09885arXiv · primary research

Corrections

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