cad-dxf-agent — DXF Drawing Analysis

Overview

CAD reviewers manually scan drawings for code compliance, QA defects, quantities, and ambiguities — slow and error-prone. This skill automates that for DXF files by driving the deterministic cad-analyze CLI (no LLM, no API key, no network) and reporting the findings in prose.

Capability	What it answers	Command
compliance	Does it meet ADA / IBC / a custom code?	`cad-analyze compliance FILE [--profile ada\|ibc-2021\|residential]`
health	Is the drawing clean? (overlaps, text, orphan layers)	`cad-analyze health FILE`
takeoff	How much of everything?	`cad-analyze takeoff FILE`
summary	What is this drawing, in plain English?	`cad-analyze summary FILE`
rfi	What's ambiguous / needs clarification?	`cad-analyze rfi FILE`
zones	What rooms/areas are enclosed, and how big?	`cad-analyze zones FILE`
compare	What changed between two revisions?	`cad-revision diff MASTER REVISION`

Prerequisites

The CLI ships with the cad-dxf-agent Python package. Check, install only if missing:

command -v cad-analyze >/dev/null 2>&1 || \
  pip install "git+https://github.com/jeremylongshore/cad-ai-agent.git"

Instructions

Locate the DXF. If the user named a file, use it; otherwise Glob for **/*.dxf and, if several match, ask which one with AskUserQuestion.
Pick the capability from the trigger words. If unclear, ask.
Run the CLI with --json, e.g. cad-analyze health DRAWING.dxf --json.
Parse the JSON and report in prose. For compliance, pass --profile when the user names a code; default ada.

See references/capabilities.md for each report's JSON shape.

Output

Report in prose, not raw JSON. Lead with the headline, then cite the drawing's own evidence—entity handles and layers—so a reviewer can act.

compliance: profile pass/fail, violation count, then each finding.
health: score (0–100), then issues grouped by severity.
takeoff: quantities by category, name, quantity, and unit.
summary: narrative and room list.
rfi: numbered questions ready to send to a reviewer.
zones: detected rooms or areas and computed area.

Error Handling

Exit 0 means the command completed. Compliance may exit 1 when violations are present; parse its JSON and report the findings rather than treating it as a command failure.
Exit 2 means the file is missing or unreadable. Confirm the path and that it is a valid DXF before retrying.
If cad-analyze is unavailable, install the prerequisite once and rerun the requested command.
An empty findings or issues list is a pass; never invent findings.

Examples

Check a floor plan for ADA compliance

cad-analyze compliance ./plans/level-1.dxf --profile ada --json

Report the violation count and every finding's rule and evidence handles.

Audit drawing quality

cad-analyze health drawing.dxf --json

Report the score, then group issues by severity.

Safety

Read-only. Analysis never modifies the DXF. cad-revision apply/bundle writes a new file; the original is never touched.
Offline. The analysis capabilities make no network calls and use no secrets.

Natural-language editing and agent-mode tool use require a bring-your-own LLM provider and are not exposed here.

Resources

references/capabilities.md — JSON shape of each report and how to read it.
Source + issues: https://github.com/jeremylongshore/cad-ai-agent