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writing-dev-server-tests

Guides writing HMR/Dev Server tests in test/bake/. Use when creating or modifying dev server, hot reloading, or bundling tests.

Quality

87%

Does it follow best practices?

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SKILL.md
Quality
Evals
Security

Quality

Content

93%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.

An exemplary lean, code-first skill body: executable examples, a concrete API reference, and a sharp rule about dev.write/patch/delete vs node:fs. The only notable gap is that the workflow for writing a new test is implied by structure rather than stated as an ordered sequence, and devAndProductionTest/prodTest are named but never demonstrated.

DimensionReasoningScore

Conciseness

The body is lean: file structure, categories, two complete code examples, and an API list with no padding or explanation of concepts Claude already knows. Every token earns its place.

5 / 5

Actionability

Two copy-paste-ready devTest examples cover the common cases (watch/patch/reload and expected-error flows), and the Key APIs plus "Use dev.write/patch/delete instead of node:fs - they wait for hot-reload" give fully executable guidance.

5 / 5

Workflow Clarity

The sections imply a clear path (file structure → test categories → devTest example → key APIs → error testing), and assertion helpers act as checkpoints, but the sequence is implicit — there are no explicit ordered steps for writing a new test. No destructive or batch operations are involved, so no validation cap applies.

4 / 5

Progressive Disclosure

The skill is a self-contained single file with no bundle files; all content is appropriately inline, well-organized into scannable sections, and easy to navigate, which fits the simple-skill exception.

5 / 5

Total

19

/

20

Passed

Description

73%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 concise, third-person description with an explicit and concrete 'Use when' trigger clause and a well-differentiated niche. Its main weakness is a thin 'what' — a single action verb rather than the several specific capabilities the skill body actually covers (devTest authoring, error testing, API usage).

Suggestions

Expand the 'what' clause to list the concrete capabilities shown in the body, e.g. "Guides writing and modifying HMR/dev-server tests in test/bake/ using devTest, including file setup, hot-reload assertions, client messaging, and expected-error testing."

Add trigger variations users might say, such as production-mode tests or devAndProductionTest, since the skill body explicitly covers dev-and-prod tests.

DimensionReasoningScore

Specificity

"Guides writing HMR/Dev Server tests in test/bake/" names the domain and one concrete action tied to a specific location, matching the anchor for 1-2 concrete actions without comprehensive coverage. It is not 4 because the description does not list several specific actions.

3 / 5

Completeness

Both parts are explicit: the what ("Guides writing HMR/Dev Server tests in test/bake/") and the when ("Use when creating or modifying dev server, hot reloading, or bundling tests"). Not 5 because the what is a single thin action clause rather than a comprehensive set of concrete capabilities.

4 / 5

Trigger Term Quality

"dev server, hot reloading, or bundling tests" plus "HMR" are natural phrases users would say when needing this skill. Not 5 because common variations such as production-mode or dev-and-prod tests are missing.

4 / 5

Distinctiveness Conflict Risk

A clear niche (HMR/dev-server/hot-reload test authoring in a specific test directory) with distinct trigger terms means minimal conflict risk with other skills.

5 / 5

Total

16

/

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.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

oven-sh/bun

Path

.claude/skills/writing-dev-server-tests/SKILL.md

Reviewed

Table of Contents

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