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abstract indexed · arXiv 2608.23953 · updated 2026-10-18

The Empire, Long Divided, Must Unite: Architectural Convergence in Three LLM Agent Harnesses

First page of The Empire, Long Divided, Must Unite: Architectural Convergence in Three LLM Agent Harnesses
From the original paper · arXiv 2608.23953Page 1. Select the image to read the PDF.

This source-level study replaces ad hoc agent-loop implementations with a converged five-element harness design: a commoditised loop, an append-only replayable session record, model quirks kept as data, progressive context disclosure, and explicit extension seams. The cost is implementation effort: building the replayable record and extension seams adds engineering complexity, and the paper provides no measured performance benefit, only architectural evidence from three case harnesses. What can fail is that the convergence partly reflects diffusion and literal code reuse rather than independent validation, and the study identifies external verifiability as entirely absent, so provenance-sensitive deployments remain unaddressed by all examined designs.

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Compare against

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  1. Locate the paper's implementation and check its license, model support, data needs, and hardware requirements. Stop here if you cannot obtain the required artifacts.
  2. Save a small set of representative product tasks and expected outcomes. Keep evaluation tasks out of any training or tuning, and choose quality and cost limits before running.
  3. Run the baseline and the proposed change on identical inputs. Keep other settings fixed and repeat paired runs to expose variation.
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What to measure

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source-linked claims
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exposure checks
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Why it was shortlisted

The technical change, research area, and reason it entered the archive.

recommendation
adopt
research area
coding agents
technical change
Converged five-element agent harness architecture
published
2026-08-25

The study offers directly implementable architectural patterns for agent harnesses that a small team can adopt on constrained infrastructure, but its findings are descriptive rather than performance-validated.

About the technical core

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Claims and evidence

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  1. claim 01Paperraft inference
    Read the brief interpretation

    This source-level study replaces ad hoc agent-loop implementations with a converged five-element harness design: a commoditised loop, an append-only replayable session record, model quirks kept as data, progressive context disclosure, and explicit extension seams. The cost is implementation effort: building the replayable record and extension seams adds engineering complexity, and the paper provides no measured performance benefit, only architectural evidence from three case harnesses. What can fail is that the convergence partly reflects diffusion and literal code reuse rather than independent validation, and the study identifies external verifiability as entirely absent, so provenance-sensitive deployments remain unaddressed by all examined designs.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

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Exposure map

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quality

Still unknown

Which tasks improve, and which regress against the baseline?

compute and memory

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latency

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Are startup time, typical response time, and slow requests measured separately?

operations

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software compatibility

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security

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data and training

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reproducibility

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Continue the investigation

A reading guide for coding agents.

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What to inspect

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Plan a fair comparison

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Questions for adoption

How many tasks pass independent tests, and what is the cost per accepted change?

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Inside the paper

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