BC leak-buy
Buy and download leak content from promo or download links using a preinstalled leak CLI.
Buy and download leak content from promo or download links using a preinstalled leak CLI.
As a process C 63/100 · Has gaps — weak spots: result and completion, progress reporting
How to improve
- Say in the description WHEN to use the skill ("use when…", example requests): that is the agent's main cue.
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 · 5
✓ No critical or high findings
Medium and low: 5
-
low Exfiltration
exfil-webhook-urlscripts/buy.sh:10Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)# bash skills/leak-buy/scripts/buy.sh "https://xxxx.trycloudflare.com/" --buyer-private-key-file ./buyer.key
placeholder -
low Exfiltration
exfil-webhook-urlscripts/buy.sh:11Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)# bash skills/leak-buy/scripts/buy.sh "https://xxxx.trycloudflare.com/download" --download-code friends-only --buyer-private-key-file ./buyer.key
placeholder -
low Exfiltration
exfil-webhook-urlscripts/buy.sh:12Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)# bash skills/leak-buy/scripts/buy.sh "https://xxxx.trycloudflare.com/download" --buyer-private-key-file ./buyer.key --basename myfile
placeholder -
low Exfiltration
exfil-webhook-urlscripts/buy.sh:13Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)# bash skills/leak-buy/scripts/buy.sh "https://xxxx.trycloudflare.com/" --buyer-private-key-file ./buyer.key --out ./downloads/myfile.bin
placeholder -
low Exfiltration
exfil-webhook-urlSKILL.md:59Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)PROMO_URL="https://xxxx.trycloudflare.com/"
placeholder
Files scanned: 2. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- warning
description-no-whendescription does not say WHEN to use the skill (no "use when")
Process rating: all ten parameters 63/100
- 0Result and completion. Does not say what the result is
- 0Progress reporting. Says nothing while it works
- 50When it triggers. No condition that starts the skill
- 50Failures and branches. 0 branches, has a failure section
- 60Tools and files. Uses tools (bash) that frontmatter does not declare
- 70Inputs and preconditions. Inputs and preconditions are listed
- 100Steps. 27 steps
- 100Consistency. Name and required fields are in place
- 100Execution cost. Instruction body is 662 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)
- +3Description length 89: 120–800 characters recommended
- +3Output format is not stated: the model decides each time
- +1No license
- +2Single-language instructions
- +4Structure: 10 headings
- +3Step-by-step instructions: 27 items
- +4Has examples (5 code blocks)
- +3All 1 scripts are documented
Quality base 70; lint remarks subtract, signals add up to 100. Result: 72.