CC Website Change Monitor & Alert System
Use when monitoring websites for content changes, comparing page snapshots with diff, scheduling periodic checks, or sending alerts via email and webhook notifications.
As a process C 50/100 · Has gaps — weak spots: when it triggers, inputs and preconditions, failures and branches
What is at stake
The skill contains fragments that, in the wrong hands, cost money or data. Below: what the installer risks and what the author should do.
The skill contains commands that delete files, rewrite disks or execute code fetched from the network. The agent may run them without asking if it believes the instructions require it.
Replace destructive commands with safe equivalents that ask for confirmation, scope them to one folder, and stop piping curl into a shell: pin a version and a checksum.
How to improve
- Address the high-severity findings: each costs 18 safety points. If one is a false positive, add the rule id to guard.allow in spec.yaml.
- 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 · 11
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high Dangerous commands
cmd-persistencescripts/script.sh:441Persistence mechanism (cron / launchd / scheduled task / autorun registry)(crontab -l 2>/dev/null; echo "$cron_cmd") | crontab -
Medium and low: 10
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medium Dangerous commands
cmd-persistencescripts/script.sh:415Persistence mechanism (cron / launchd / scheduled task / autorun registry) (detector / deny-list definition)crontab -l | grep -v "site-change-alert" | crontab -
detector -
medium Dangerous commands
cmd-persistencescripts/script.sh:457Persistence mechanism (cron / launchd / scheduled task / autorun registry) (detector / deny-list definition)Remove: crontab -l | grep -v "$url" | crontab -
detector -
low Dangerous commands
cmd-cron-mentionscripts/script.sh:415Mentions editing / listing crontabcrontab -l | grep -v "site-change-alert" | crontab -
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low Dangerous commands
cmd-cron-mentionscripts/script.sh:418Mentions editing / listing crontabcrontab -l | grep "site-change-alert"
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low Dangerous commands
cmd-cron-mentionscripts/script.sh:432Mentions editing / listing crontabif crontab -l 2>/dev/null | grep -qF "$url"; then
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low Dangerous commands
cmd-cron-mentionscripts/script.sh:436Mentions editing / listing crontabcrontab -l 2>/dev/null | grep -vF "$url" > "$temp_cron"
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low Dangerous commands
cmd-cron-mentionscripts/script.sh:441Mentions editing / listing crontab(crontab -l 2>/dev/null; echo "$cron_cmd") | crontab -
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low Exfiltration
exfil-webhook-urlscripts/script.sh:482Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)bash scripts/script.sh notify webhook "https://hooks.slack.com/services/T.../B.../..."
placeholder -
low Exfiltration
exfil-webhook-urlscripts/script.sh:565Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)bash scripts/script.sh notify webhook "https://hooks.slack.com/..."
placeholder -
low Exfiltration
exfil-webhook-urlSKILL.md:46Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)bash scripts/script.sh notify webhook "https://hooks.slack.com/..."
placeholder
Files scanned: 3. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- warning
name-formatname should be kebab-case (lowercase letters, digits, hyphens) - note
frontmatter-keyunknown frontmatter key "homepage" - note
frontmatter-keyunknown frontmatter key "source"
Process rating: all ten parameters 50/100
- 0Inputs and preconditions. Does not say what the process needs to start
- 0Failures and branches. Linear process with no failure handling
- 0Progress reporting. Says nothing while it works
- 20When it triggers. No condition that starts the skill
- 30Running it twice. 1 mutating operations with no state check
- 40Consistency. Frontmatter name (Website Change Monitor & Alert System) differs from the folder (site-change-alert)
- 60Result and completion. Output format stated, no completion criterion
- 75Steps. 3 steps
- 100Tools and files. No external tools needed
- 100Execution cost. Instruction body is 320 tokens
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)
- +1No license
- +2Single-language instructions
- +3Description length 168: enough signal without eating the budget
- +4Structure: 10 headings
- +3Step-by-step instructions: 3 items
- +3Output format is stated explicitly
- +4Has examples (6 code blocks)
- +3All 1 scripts are documented
Quality base 70; lint remarks subtract, signals add up to 100. Result: 83.