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mps-baselanguage

Author and edit MPS `jetbrains.mps.baseLanguage` (Java) nodes — choose between the Java parser and JSON AST blueprints, map Java syntax to baseLanguage concepts/roles, harvest persistent member references, and validate. Use when writing class/method bodies, fields, expressions, statements, or any Java/BaseLanguage code inside MPS models, especially when BaseLanguage extensions (smodel, closures, collections) are involved.

79

Quality

100%

Does it follow best practices?

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SecuritybySnyk

Passed

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SKILL.md
Quality
Evals
Security

Quality

Content

100%

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

The body is a lean, highly actionable overview: concrete tooling directives, a fully sequenced workflow with validation gates and a repair loop, and a well-signaled one-level reference index. It respects Claude's intelligence and earns its tokens.

DimensionReasoningScore

Conciseness

The body assumes Claude's competence — it never explains what MPS, an AST, or closures are — and every line is operational guidance, so each token earns its place.

3 / 3

Actionability

Concrete tool names (e.g. `mps_mcp_parse_java_and_insert`, `mps_mcp_update_node`), exact concept/role names, and specific directives (e.g. 'ConstructorDeclaration.returnType MUST be a VoidType node') give fully executable guidance with no pseudocode.

3 / 3

Workflow Clarity

The 8-step Common Workflow is clearly sequenced with explicit validation checkpoints ('Validate in three gates': dryRun, check_root_node_problems, alter_nodes MAKE) and a 'Repair' feedback loop via FIX_REFERENCES, matching the top anchor.

3 / 3

Progressive Disclosure

The Reference Index signals seven one-level-deep, real files (all present under references/) with a clear 'Open … when you …' navigation cue for each, keeping the body an overview pointing to detail.

3 / 3

Total

12

/

12

Passed

Description

100%

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

The description is specific, complete, and well-triggered for its niche. It names concrete actions, includes an explicit 'Use when' clause, and uses natural domain terms unlikely to conflict with sibling skills.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'choose between the Java parser and JSON AST blueprints', 'map Java syntax to baseLanguage concepts/roles', 'harvest persistent member references, and validate' — matching the 'lists multiple specific concrete actions' anchor.

3 / 3

Completeness

Explicitly answers both what (author/edit, choose path, map syntax, harvest refs, validate) and when via the literal 'Use when writing class/method bodies…' clause, matching the top anchor.

3 / 3

Trigger Term Quality

Natural trigger phrasing a BaseLanguage author would say — 'writing class/method bodies, fields, expressions, statements', 'Java/BaseLanguage code inside MPS models', 'BaseLanguage extensions (smodel, closures, collections)' — gives good coverage of the niche's common terms.

3 / 3

Distinctiveness Conflict Risk

A narrow MPS `jetbrains.mps.baseLanguage` (Java) AST-authoring niche with distinct triggers makes it unlikely to fire for any other skill.

3 / 3

Total

12

/

12

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

15

/

16

Passed

Repository
JetBrains/MPS
Reviewed

Table of Contents

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