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build123d-core

Use when custom Build123d Python CAD code, geometry operations, selectors, locations, joints, assemblies, imports, exports, or DFM details are needed. Read `references/dfm-rules.md` BEFORE writing the first line of geometry code for any screw boss, standoff, snap fit, wall interface, or overhang-sensitive feature — not after the shape exists. A screw fastening into a 3D-printed part additionally requires the `build123d-libs` kit; never hand-model that joint.

71

Quality

86%

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SKILL.md
Quality
Evals
Security

Quality

Content

85%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

Well-structured reference index with executable snippets, a validated workflow with feedback loops, and a clean one-level reference split. Only slight conciseness drag from the repeated DFM directive.

Suggestions

State the 'read references/dfm-rules.md before modeling DFM features' directive once (e.g. in Core Workflow) and reference it elsewhere rather than repeating the full instruction.

Make the Workbench Cell snippet fully self-contained or label it illustrative so it is unambiguously executable.

DimensionReasoningScore

Conciseness

A lean overview that points to references rather than inlining tutorials and assumes competence, but the "read references/dfm-rules.md first" directive is repeated across the description, intro, and Core Workflow step 3, leaving room to tighten.

4 / 5

Actionability

Provides concrete executable snippets (publish/Box, full cad.inspect parameter blocks, cad.edit/cad.look/cad.export commands) and concrete self-checks (assert + print), with only minor illustrative-only gaps.

4 / 5

Workflow Clarity

The numbered Core Workflow has an explicit validation checkpoint ("inspect its returned image before the next edit"), a visible-findings feedback loop, assert/print self-checks, and export Pass-gating, matching the top anchor.

5 / 5

Progressive Disclosure

Clear overview with a well-signaled one-level-deep reference index table; all 11 referenced files exist and are organized by "What it answers", with bulk API content kept out of SKILL.md.

5 / 5

Total

18

/

20

Passed

Description

87%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, trigger-rich description with explicit "Use when" guidance and a concrete DFM guardrail. It is mostly an area list rather than a verbs list, which keeps specificity just below the top anchor.

DimensionReasoningScore

Specificity

Lists several specific capability areas ("geometry operations, selectors, locations, joints, assemblies, imports, exports") plus concrete DFM features ("screw boss, standoff, snap fit"), but is a noun/area list with a guardrail rather than multiple concrete action verbs, so it sits just below a 5.

4 / 5

Completeness

Explicitly answers both "what" (custom Build123d CAD code areas) and "when" ("Use when ... are needed") with concrete trigger phrases and feature-specific guidance.

5 / 5

Trigger Term Quality

Good keyword coverage of natural CAD terms (selectors, joints, assemblies, imports, exports, DFM, screw boss, standoff, snap fit, overhang) that users would say, though a few common synonyms are absent.

4 / 5

Distinctiveness Conflict Risk

Clear Build123d-specific CAD niche with distinct, domain-locked triggers and minimal overlap risk with other skills.

5 / 5

Total

18

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
JimmyPang02/open-replicator
Reviewed

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