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abstract indexed · arXiv 2610.13227 · updated 2026-10-18

Understanding and Mitigating Cross-Session Attacks via Persistent Artifacts in Agent Skill Composition

First page of Understanding and Mitigating Cross-Session Attacks via Persistent Artifacts in Agent Skill Composition
From the original paper · arXiv 2610.13227Page 1. Select the image to read the PDF.

It replaces unguarded cross-session skill execution, in which persistent artifacts are consumed without provenance context, with a runtime layer that restores artifact provenance and adds a pre-execution advisory review while leaving the final decision to the agent. The cost is additional engineering to record and propagate artifact provenance, extra review latency and prompt/context tokens per skill invocation, and possible advisory false positives that can block or alter legitimate flows. It can fail because the final execution choice remains with the agent, roughly one in ten attacks still succeeds in the reported setting, and provenance can be incomplete across sessions, tools, or artifact types outside the evaluated benchmark.

For solo builders

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

An agent reads external documents or tool responses that may contain malicious instructions.

What you would change

Replay attacks and legitimate lookalikes in an isolated copy of your agent workflow.

Try the idea on your product

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

Replay attacks and legitimate lookalikes in an isolated copy of your agent workflow.

Compare against

Your existing checks with the same tasks, permissions, and tool responses.

  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

Successful attacks missed, legitimate actions blocked, detection delay, and review 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.

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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
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
test
research area
safety and guardrails
technical change
Provenance-aware advisory guard for agent skill execution
published
2026-10-09

It targets a realistic production risk for coding and tool-using agents and appears deployable as a wrapper around existing APIs without model training, but its residual attack rate, agent-dependent advisories, and benchmark-limited evidence require workload-specific validation before production reliance.

About the technical core

Equations have not been fetched yet.

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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

    It replaces unguarded cross-session skill execution, in which persistent artifacts are consumed without provenance context, with a runtime layer that restores artifact provenance and adds a pre-execution advisory review while leaving the final decision to the agent. The cost is additional engineering to record and propagate artifact provenance, extra review latency and prompt/context tokens per skill invocation, and possible advisory false positives that can block or alter legitimate flows. It can fail because the final execution choice remains with the agent, roughly one in ten attacks still succeeds in the reported setting, and provenance can be incomplete across sessions, tools, or artifact types outside the evaluated benchmark.

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

    Inspect the source
  2. claim 02Paperraft inference

    SkillRelayGuard reduces overall attack success rate from 69.5% to 10.9% (about 6.4x lower) and attack chain success rate from 54.8% to 10.0%, while raising legitimate task completion from 79.6% to 87.5% across three agent settings.

    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 safety and guardrails.

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 2610.13227

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