Content
77%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a strong, highly actionable migration guide with excellent before/after examples covering all major Svelte 4→5 patterns. Its main weakness is length — at ~300 lines with 13 inline patterns, it consumes significant context window space that could be reduced by moving less common patterns to a reference file. The workflow is well-sequenced with a verification step, and the 'Important Notes' section effectively prevents common migration mistakes.
Suggestions
Consider splitting less common migration patterns (e.g., dynamic components, class directives, app state) into a separate REFERENCE.md to reduce the main file's token footprint
Remove the hedging in section 12 ('either works') — pick the recommended approach or drop the section since class: directives still work unchanged
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is comprehensive but quite long (~300 lines). The before/after pattern is effective but some sections could be consolidated (e.g., sections 6 and 7 on component events and forwarding could merge). The class: directive section hedges ('either works') which is unnecessary. However, it avoids explaining what Svelte is or basic concepts, so it respects Claude's intelligence. | 2 / 3 |
Actionability | Every migration pattern includes fully executable before/after code examples in proper Svelte syntax with TypeScript. The examples are copy-paste ready and cover edge cases (e.g., slots with props, event modifiers, bindable props). The workflow section provides a clear systematic order and ends with a concrete verification command (`pnpm check`). | 3 / 3 |
Workflow Clarity | The workflow section provides a clear 6-step sequence with a logical ordering (props first, then state, derived, effects, events, slots). It includes a validation checkpoint at the end (`pnpm check`). The 'Important Notes' section acts as a checklist of things NOT to change, which prevents common errors. The ordering rationale (props first) is sound since later transformations depend on prop structure. | 3 / 3 |
Progressive Disclosure | The content is a monolithic file with 13 migration patterns inline. While well-organized with clear headers, the sheer volume (especially sections like slots with multiple sub-patterns) could benefit from being split into a reference file, with SKILL.md containing just the workflow and most common patterns. No bundle files exist to offload content to. | 2 / 3 |
Total | 10 / 12 Passed |