AC javascript
Writes, debugs, and reviews JavaScript: async and the event loop, coercion, closures, dates, Unicode, regex, and modern ES2023+ APIs. Use when JS throws TypeError or "undefined is not a function", a promise never settles or a rejection goes unhandled, NaN or [object Object] appears, dates shift by a day, sorting or equality misbehaves, memory grows, a regex hangs, JSON loses precision, a Node process won't exit or ignores signals, or fetch doesn't reject on a 404; also when choosing data structures, handling errors, profiling slow code, or checking whether a feature is safe for a target Node or browser version. Covers Node and browser runtime edges. Not for TypeScript type-system design or framework internals.
Writes, debugs, and reviews JavaScript: async and the event loop, coercion, closures, dates, Unicode, regex, and modern ES2023+ APIs.
As a process C 61/100 · Has gaps — weak spots: inputs and preconditions, running it twice, progress reporting
How to improve
- Your own cases (evals/evals.json, 4–6 real requests with expected answers): the full check would then run those instead of a model-drafted suite.
- A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.
Guard findings · 0
✓ No critical or high findings
Files scanned: 17. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- note
frontmatter-keyunknown frontmatter key "slug" - note
frontmatter-keyunknown frontmatter key "changelog" - note
frontmatter-keyunknown frontmatter key "homepage"
Process rating: all ten parameters 61/100
- 0Inputs and preconditions. Does not say what the process needs to start
- 0Progress reporting. Says nothing while it works
- 30Running it twice. 6 mutating operations with no state check
- 50When it triggers. No condition that starts the skill
- 60Tools and files. Uses tools (web, node) that frontmatter does not declare
- 60Result and completion. Output format stated, no completion criterion
- 60Failures and branches. 2 branches
- 100Steps. 59 steps
- 100Consistency. Name and required fields are in place
- 100Execution cost. Instruction body is 3280 tokens
- medium Safety rules and hard prohibitions inside a skill: they belong in the system prompt, here they protect nothing
- low 14 top-level sections: this looks like several domains in one skill
Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.
Quality signals
- +5Description has no quoted example phrases that should trigger the skill
- +4No input/output examples
- +1No license
- +2Single-language instructions
- +4Description says when NOT to use the skill
- +3Description length 719: enough signal without eating the budget
- +4Structure: 14 headings
- +3Step-by-step instructions: 59 items
- +3Output format is stated explicitly
Quality base 70; lint remarks subtract, signals add up to 100. Result: 84.