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next-bundle-optimizer

Audit and reduce Next.js browser initial-load work. Use for slow route startup, oversized client bundles, duplicate browser dependencies, or features that can wait for interaction.

Quality

92%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

92%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 multi-phase workflow skill: concrete commands, explicit per-phase checkpoints, strong validation and revert loops, and a clean one-level reference structure. The only weakness is mild — a few verbose passages that could be trimmed without losing meaning.

DimensionReasoningScore

Conciseness

The body is dense and assumes Claude's competence — no space is spent explaining Next.js or bundling concepts — and operational details dominate. A few sentences could still be tightened (e.g., the repeated "install it first if unavailable" clauses for three external skills and the "including names with spaces" aside), keeping it just below anchor 5.

4 / 5

Actionability

Guidance is fully executable: copy-paste bash for capture/export ("pnpm exec next analyze --output --snapshot 'audit-before-unique-1'"), schema resolution via "pnpm exec node -p \"require.resolve(...)\"", a defined scan-table schema with named columns, three named dispositions, and concrete test cases (debounced search, editable lazy features).

5 / 5

Workflow Clarity

Six clearly sequenced phases each end with an explicit "**Done:**" validation checkpoint, and error-recovery loops are present throughout: pipefail guidance for failed exports, discarding partial archives, reverting edits that fail metric or behavior checks, and recording blockers. Fix mode's source/dependency changes are well guarded.

5 / 5

Progressive Disclosure

The SKILL.md is a well-organized workflow overview, and the three detailed topics (graph methods, fix patterns, client dependencies) are split into one-level-deep reference files that all exist and are each clearly signaled with when to read them (e.g., "Read [Graph methods](references/graph-methods.md) before constructing the graph"). No nested references.

5 / 5

Total

19

/

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 concise, well-formed description that clearly states both capability and explicit trigger conditions in third-person voice. Trigger phrasing is natural and specific to the Next.js bundle domain, with only minor room to add common synonyms.

DimensionReasoningScore

Specificity

"Audit and reduce Next.js browser initial-load work" names the domain and concrete actions, and the enumerated problem classes ("oversized client bundles, duplicate browser dependencies") give specific coverage. It stops short of anchor 5 because the description does not comprehensively cover the skill's capabilities (e.g., baseline capture, leak detection, fix verification).

4 / 5

Completeness

Explicitly answers both "what" ("Audit and reduce Next.js browser initial-load work") and "when" ("Use for slow route startup, oversized client bundles, duplicate browser dependencies, or features that can wait for interaction") with concrete trigger phrases, matching the anchor-5 example structure. Third-person voice is used correctly.

5 / 5

Trigger Term Quality

Includes several natural phrases users would say — "slow route startup", "oversized client bundles", "duplicate browser dependencies" — which is good keyword coverage. Not anchor 5 because common synonyms like "bundle size", "page load", or "JavaScript performance" are missing.

4 / 5

Distinctiveness Conflict Risk

A clear niche (Next.js browser initial-load bundle work) with distinct, specific triggers; unlikely to fire for unrelated skills. Slight adjacency to general performance-tuning skills exists but is minimal.

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.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

vercel/next.js

Path

skills/next-bundle-optimizer/SKILL.md

Reviewed

Table of Contents

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