Content
86%Weight 40%Scale 1-5Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
A well-engineered quick-reference skill: fully executable code for every major DO feature, real verification via a Vitest example, and a clean split between the inline quick reference and three substantive, accurately described reference files. The only slack is minor redundancy between inline sections and the reference material on storage/basic patterns.
Suggestions
Trim the 'Storage Operations' section to the two canonical calls or move it to references/rules.md, since the basic example already demonstrates sql.exec and the section repeats it.
Merge the 'When to Use' list and the 'Use Durable Objects For' table, which cover the same ground twice.
Add one validation loop (e.g., 'run the Vitest suite after adding a migration or new RPC method; fix and re-run until green') to turn the testing section into an explicit checkpoint in the implementation sequence.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is dense and assumes competence — no filler like explaining what a DO is — matching 'Efficient; minor instances of over-explanation that could be trimmed'. The 'Storage Operations' section re-illustrates sql.exec/put/get patterns already shown in the basic example, and the 'Use Durable Objects For' table partially duplicates the 'When to Use' list. Not a 5 because those small redundancies exist; not a 3 because there is no padded explanation of concepts Claude already knows. | 4 / 5 |
Actionability | Everything is copy-paste ready and complete: wrangler.jsonc config, a full TypeScript DurableObject class with Env interface, stub-creation variants, storage snippets, alarm scheduling/cancellation, and a runnable Vitest example — matching 'Fully executable; copy-paste ready code or commands; specific examples cover the common cases'. Not a 4 because no key detail is missing from the primary code path. | 5 / 5 |
Workflow Clarity | Content is ordered along the real implementation path (wrangler config → class + migrations → stubs → storage → alarms → testing), with the Testing Quick Start acting as a verification checkpoint and anti-patterns flagging failure modes — 'Clear sequence with most checkpoints present; minor validation gaps'. Not a 5 because there is no explicit validate/fix/retry loop (e.g., verifying a migration or test failure handling); not a 3 because the testing section does provide a concrete checkpoint rather than none. | 4 / 5 |
Progressive Disclosure | SKILL.md is a genuine overview: quick-reference snippets inline, with three clearly signaled one-level-deep references (./references/rules.md, testing.md, workers.md), each annotated with its contents and backed by a search keyword line — matching 'Clear overview with well-signaled one-level-deep references; content appropriately split'. All three files exist and contain the promised material (~300 lines each), with no nested references. | 5 / 5 |
Total | 18 / 20 Passed |