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abstract indexed · arXiv 2610.21755 · updated 2026-10-18

DeciCAD: Harness-Grounded Learning of Action Policies for CAD Agents

First page of DeciCAD: Harness-Grounded Learning of Action Policies for CAD Agents
From the original paper · arXiv 2610.21755Page 1. Select the image to read the PDF.

Replaces a general-purpose coding harness for CAD agents with a domain-native harness exposing semantic CAD actions, decision-oriented observations, and persistent state, plus a pipeline of trajectory-derived SFT and geometry-grounded online RL. Costs include building and maintaining a CAD-specific action/observation layer, collecting interaction trajectories, and running SFT plus online RL against a geometry evaluation environment, which is a substantial engineering and compute commitment beyond inference-time prompting. The approach can fail if the harness's semantic action set does not cover the target CAD operations, if trajectory supervision encodes suboptimal decisions, or if the learned policy overfits to the benchmark procedures and does not transfer to other CAD tools or workflows.

For solo builders

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

A multi-step product task fails because the agent loses track of dependencies.

What you would change

Try the proposed planning step on tasks with checkable intermediate outcomes.

Try the idea on your product

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

Try the proposed planning step on tasks with checkable intermediate outcomes.

Compare against

The same agent solving the same tasks without the new planning step.

  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

Task completion, unnecessary steps, planning tokens, response time, 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.

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source-linked claims
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Why it was shortlisted

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

recommendation
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research area
planning and decomposition
technical change
Domain-native CAD agent harness with SFT and online RL
published
2026-10-15

The results are specific to CAD and depend on a custom harness and RL infrastructure that a small team can only justify if it is actively building CAD agents; otherwise only the general principle that harness design shapes agent policies transfers.

About the technical core

Equations have not been fetched yet.

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Claims and evidence

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  1. claim 01Paperraft inference
    Read the brief interpretation

    Replaces a general-purpose coding harness for CAD agents with a domain-native harness exposing semantic CAD actions, decision-oriented observations, and persistent state, plus a pipeline of trajectory-derived SFT and geometry-grounded online RL. Costs include building and maintaining a CAD-specific action/observation layer, collecting interaction trajectories, and running SFT plus online RL against a geometry evaluation environment, which is a substantial engineering and compute commitment beyond inference-time prompting. The approach can fail if the harness's semantic action set does not cover the target CAD operations, if trajectory supervision encodes suboptimal decisions, or if the learned policy overfits to the benchmark procedures and does not transfer to other CAD tools or workflows.

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

    Inspect the source
  2. claim 02Paperraft inference

    Reduces model-output tokens by 45--88% versus a general-purpose coding harness; SFT improves F1 from 0.6883 to 0.7437 and online RL raises F1 to 0.7880 and geometry availability from 66.5% to 73.5% across four CAD benchmarks.

    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 planning and decomposition.

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 2610.21755

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