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abstract indexed · arXiv 2610.06597 · updated 2026-10-18

Can Agent Harnesses and Inference Engines Hear Each Other? The HEAR Protocol for Agentic LLM Serving

First page of Can Agent Harnesses and Inference Engines Hear Each Other? The HEAR Protocol for Agentic LLM Serving
From the original paper · arXiv 2610.06597Page 1. Select the image to read the PDF.

HEAR replaces the standard one-directional request/response interface between agent frameworks and inference engines with a bidirectional protocol exposing workflow intent (context lifecycles, dependencies) and engine state (queues, KV-cache pressure) to enable cache-aware and workload-aware scheduling. It costs integration effort on both sides: the harness must emit structured workflow metadata and the engine must expose runtime state and act on it, so it requires control over a modified or compatible self-hosted inference stack. It can fail when workloads lack the concurrency or prefix-reuse patterns the coordination exploits, when the engine ignores or misinterprets hints, or when the reader uses third-party APIs where the engine side is entirely inaccessible.

For solo builders

A possible application for this research area. Paper-specific feasibility still needs a full-paper review.

Your inference service slows down when several customers send requests together.

What you would change

Replay a recorded request trace with only the proposed serving policy changed.

Try the idea on your product

A proposed first test. Set your budget and success criteria before running it.

Replay a recorded request trace with only the proposed serving policy changed.

Compare against

Your current scheduler on the same model and hardware.

  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.
  4. Save per-task outputs, failures, timings, and all usage costs. Review regressions before expanding the test.

What to measure

Requests meeting your latency target, throughput, failures, and cost per successful request.

When to keep it

Keep the change only if it meets your preselected quality and latency limits and improves the metric you care about after setup and operating costs. Otherwise retain the baseline. This is an exploration plan, not a validated recommendation.

Download test plan ↓

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Do not allocate compute yet.

This page uses the abstract and public adoption signal only. Request the deep report before relying on its recommendation.

Abstract-level screening only. Risks and infrastructure may not have been evaluated. This recommendation is not a reproduced result.
minimum test setup
not reported
published evidence setup
not reported
source-linked claims
0 of 2
exposure checks
0 of 8

Why it was shortlisted

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

recommendation
watch
research area
serving and batching
technical change
Harness-engine coordination protocol (HEAR) for agentic serving
published
2026-10-05

The gains are demonstrated only on self-hosted, memory-constrained, concurrent serving with a HEAR-instrumented engine (Mooncake), which a single-GPU or API-only setup cannot currently provide.

About the technical core

Equations have not been fetched yet.

When reading the methods, identify the rule, algorithm, or evaluation protocol that produces the claimed change. An equation is useful here only if it explains that mechanism.

Inspect the original paper

Claims and evidence

A claim is source-linked only when the PDF page and matching excerpt are available.

  1. claim 01Paperraft inference
    Read the brief interpretation

    HEAR replaces the standard one-directional request/response interface between agent frameworks and inference engines with a bidirectional protocol exposing workflow intent (context lifecycles, dependencies) and engine state (queues, KV-cache pressure) to enable cache-aware and workload-aware scheduling. It costs integration effort on both sides: the harness must emit structured workflow metadata and the engine must expose runtime state and act on it, so it requires control over a modified or compatible self-hosted inference stack. It can fail when workloads lack the concurrency or prefix-reuse patterns the coordination exploits, when the engine ignores or misinterprets hints, or when the reader uses third-party APIs where the engine side is entirely inaccessible.

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

    Inspect the source
  2. claim 02Paperraft inference

    1.61x batch speedup and 2.23x lower median TTFT on SCBench; 1.23x and 2.45x end-to-end speedups on BrowseComp-Plus and DeepResearchBench, with no reported task-quality degradation

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

    Inspect the source

Exposure map

Author findings, Paperraft interpretations, and the next check. Missing analysis never counts as evidence of safety.

quality

Still unknown

Which tasks improve, and which regress against the baseline?

compute and memory

Still unknown

What memory, hardware, and total compute does the complete method require?

latency

Still unknown

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

operations

Still unknown

What must be monitored, maintained, and rolled back?

software compatibility

Still unknown

Does the implementation support your model, runtime, and hardware?

security

Still unknown

What new data access, permissions, or trust boundaries does it introduce?

data and training

Still unknown

What data preparation or training is required, and is it included in the cost?

reproducibility

Still unknown

Are code, versions, inputs, and evaluation scripts available?

Continue the investigation

A reading guide for serving and batching.

Editorial prompts, not findings from this paper or a validated test plan. Detailed analysis is still pending for the topics below.

What to inspect

What arrival pattern, concurrency, and context lengths drive the reported result?

Plan a fair comparison

Can you replay one request trace and compare throughput, tail latency, failures, and total cost?

Questions for adoption

Does the method still meet your latency target during bursts and with mixed request lengths?

Read the paper with these questions

Inside the paper

Preview the first 3 pages of the original PDF. Click the stack to turn the page.

The downloadable skill includes SKILL.md and evidence.json, with recorded findings and unanswered checks. TRY-IT.md adds a product test plan and a blank results sheet.

A reading aid for your agent. Findings still need validation.

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Open this page in the PDF ↗

Provisional research brief updated 2026-10-18. Paperraft has not reproduced this experiment.

Discuss this paper

Question a claim, compare interpretations, or share what happened when you tried the method.

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arXiv 2610.06597

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