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abstract indexed · arXiv 2610.06563 · updated 2026-10-18

HERA: Harness-Environment Co-Evolution for Reliable Agentic Abstention

First page of HERA: Harness-Environment Co-Evolution for Reliable Agentic Abstention
From the original paper · arXiv 2610.06563Page 1. Select the image to read the PDF.

HERA replaces static, hand-tuned agent harnesses and fixed training task sets with an automated loop that mutates solvable tasks into verifiable infeasible ones and co-evolves the harness against its own failures. The cost is the compute and engineering needed to run the task-mutation pipeline and iterative harness-evaluation cycles, plus dependence on environments where feasibility can be programmatically verified. It can fail when production tasks lack verifiable feasibility signals, when environment mutations do not represent real infeasibility modes, or when a transferred harness is miscalibrated for a domain's actual abstention threshold.

For solo builders

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

Tool errors or unavailable services cause your agent to abandon recoverable tasks.

What you would change

Inject repeatable tool failures and change only the recovery policy.

Try the idea on your product

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

Inject repeatable tool failures and change only the recovery policy.

Compare against

Your current retry and fallback behavior under the same injected failures.

  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

Recovered tasks, duplicate side effects, retries, time to recovery, and total cost.

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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Abstract-level screening only. Risks and infrastructure may not have been evaluated. This recommendation is not a reproduced result.
minimum test setup
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published evidence setup
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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
test
research area
failure recovery
technical change
Harness-environment co-evolution for agentic abstention
published
2026-10-05

The abstention gains and cross-model transfer are promising and API-compatible, but the reader must validate that their production environment supports verifiable task mutations before the co-evolution loop produces a useful harness.

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

    HERA replaces static, hand-tuned agent harnesses and fixed training task sets with an automated loop that mutates solvable tasks into verifiable infeasible ones and co-evolves the harness against its own failures. The cost is the compute and engineering needed to run the task-mutation pipeline and iterative harness-evaluation cycles, plus dependence on environments where feasibility can be programmatically verified. It can fail when production tasks lack verifiable feasibility signals, when environment mutations do not represent real infeasibility modes, or when a transferred harness is miscalibrated for a domain's actual abstention threshold.

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

    Inspect the source
  2. claim 02Paperraft inference

    Evolved harness raises abstention accuracy from 61.7% to 83.3% and feasible-task completion from 68.3% to 76.7%; it transfers to 19 other LLMs (+15.3 abstention points on average) and lets smaller models match stronger ones at an estimated 85% lower cost.

    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 failure recovery.

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

What to inspect

Which assumptions does the proposed method need, and where might your workload violate them?

Plan a fair comparison

Identify the baseline, metric, dataset, and experimental settings in the paper. Which can you match?

Questions for adoption

What implementation and evaluation artifacts are available, and what would you need to supply?

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

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arXiv 2610.06563

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