AB mta
NYC MTA transit — real-time subway arrivals, bus predictions, service alerts, and route info for the New York City subway and bus system. Use when the user asks about NYC public transit, subway times, MTA bus arrivals, service alerts, or nearby stops.
As a process B 71/100 · Nearly there — weak spots: inputs and preconditions, progress reporting
How to improve
For the model run — optional
- 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 · 2
✓ No critical or high findings
Medium and low: 2
-
low Secrets in code
secret-high-entropy-tokenpackage-lock.json:18High-entropy token-like string (may be an id, hash or a credential) (detector / deny-list definition)"integrity": "sha512-j+gKEx…ahh+s1F2HZ+wAce…RkU++ZWQr…uoQ==",
detector -
low Secrets in code
secret-high-entropy-tokenpackage-lock.json:64High-entropy token-like string (may be an id, hash or a credential) (detector / deny-list definition)"integrity": "sha5…rvP+yUUf…4tH/iSSo…tEA==",
detector
Files scanned: 7. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- note
frontmatter-keyunknown frontmatter key "homepage"
Process rating: all ten parameters 71/100
- 0Inputs and preconditions. Does not say what the process needs to start
- 0Progress reporting. Says nothing while it works
- 60Tools and files. Uses tools (bash, node) that frontmatter does not declare
- 60Result and completion. Output format stated, no completion criterion
- 70When it triggers. States when to use, but not when not to
- 100Steps. 33 steps
- 100Failures and branches. 2 branches, has a failure section
- 100Consistency. Name and required fields are in place
- 100Execution cost. Instruction body is 2657 tokens
- 100Running it twice. No mutating operations
- medium Safety rules and hard prohibitions inside a skill: they belong in the system prompt, here they protect nothing
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
- +4Description does not say when NOT to use the skill (false activations)
- -226 emoji in the instructions: noise for the model
- +2Single-language instructions
- +3Description length 251: enough signal without eating the budget
- +4Structure: 20 headings
- +3Step-by-step instructions: 33 items
- +3Output format is stated explicitly
- +4Has examples (1 code blocks)
- +3All 1 scripts are documented
- +1License stated
Quality base 70; lint remarks subtract, signals add up to 100. Result: 88.
External checks
ClawHub: clean
This skill is a disclosed NYC transit lookup tool that uses MTA data, an optional bus API key, and a local GTFS cache without evidence of hidden or unrelated behavior.
LLM: benign (high) · VirusTotal: benign · 28 May 2026