SIGNALAI·Jul 10, 2026, 4:00 AMSignal85Short term

From Prompts to Contracts: Harness Engineering for Auditable Enterprise LLM Agents

Source: arXiv cs.CL

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From Prompts to Contracts: Harness Engineering for Auditable Enterprise LLM Agents

arXiv:2607.08028v1 Announce Type: cross Abstract: Enterprise large language model (LLM) applications often begin as prototypes whose behavior is carried by prompts and retrieval context. Productization adds requirements for source boundaries, entity routing, answer contracts, and reproducible traces. We present a harness-engineering approach that reconstructs this pattern into a traceable, auditable LLM-agent architecture: deterministic behavior moves into code, manifests, schemas, and validation artifacts around a replaceable composition boundary, while source-backed claims remain the authori

Why this matters
Why now

The proliferation of LLM applications in enterprise settings necessitates more robust, auditable, and production-ready architectures to move beyond experimental prototypes.

Why it’s important

This development addresses critical challenges in deploying AI agents responsibly and reliably within regulated and complex enterprise environments, enabling wider adoption.

What changes

The focus shifts from ad-hoc prompt engineering to structured 'harness engineering' for LLMs, treating agents as auditable software components rather than black boxes.

Winners
  • · Enterprise software vendors
  • · Compliance and audit firms
  • · Organizations adopting LLM agents
  • · AI agent developers
Losers
  • · Companies relying solely on prompt engineering for production LLM systems
  • · Unstructured LLM deployment frameworks
Second-order effects
Direct

Enterprise LLM applications become more reliable, auditable, and scalable, accelerating their integration into core business functions.

Second

Increased trust and regulatory acceptance of AI agents lead to broader market adoption and new use cases in sensitive sectors.

Third

The standardization of LLM agent architectures could foster a common interoperable ecosystem, reducing vendor lock-in and stimulating innovation across the AI supply chain.

Editorial confidence: 95 / 100 · Structural impact: 70 / 100
Original report

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Read at arXiv cs.CL
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