BF exfat-recovery
Recover corrupted exFAT USB drives on Windows without formatting. Diagnose boot region corruption, repair with chkdsk or TestDisk, and prevent future corruption with write cache fixes, shutdown flush scripts, and automated boot region backups. Covers the 'needs to be formatted' panic scenario.
As a process F 42/100 · Will not run — References files that are not bundled: scripts/safe-shutdown.ps1, scripts/backup-boot-region.ps1
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.
- For Hermes the description must be one sentence under 60 characters; move the conditions to a "When to Use" section.
- The text references files that are not there: add them or drop the references.
- 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
-
high Dangerous commands
cmd-persistencereferences/prevention-scripts.md:89Persistence mechanism (cron / launchd / scheduled task / autorun registry)Register-ScheduledTask -TaskName "BackupExFATBootRegion" -Action $action -Trigger $trigger `
Medium and low: 1
-
low Dangerous commands
cmd-execpolicy-bypassreferences/prevention-scripts.md:85Runs PowerShell with execution policy bypassed (detector / deny-list definition)-Argument "-ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File `"C:\Users\$env:USERNAME\backups\back…ps1`""
detector
Files scanned: 4. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- warning
description-long-hermesdescription is 294 chars; the Hermes authoring standard requires ≤ 60 (one sentence, ending with a period) - warning
missing-refreference to a missing file: scripts/safe-shutdown.ps1 - warning
missing-refreference to a missing file: scripts/backup-boot-region.ps1
Process rating: all ten parameters 42/100
- 0Tools and files. 2 referenced file(s) missing: scripts/safe-shutdown.ps1, scripts/backup-boot-region.ps1
- 0Result and completion. Does not say what the result is
- 0Inputs and preconditions. Does not say what the process needs to start
- 0Progress reporting. Says nothing while it works
- 20When it triggers. No condition that starts the skill
- 65Failures and branches. 3 branches
- 100Steps. 20 steps
- 100Consistency. Name and required fields are in place
- 100Execution cost. Instruction body is 1235 tokens
- 100Running it twice. No mutating operations
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)
- +3Output format is not stated: the model decides each time
- +1No license
- +2Single-language instructions
- +3Description length 294: enough signal without eating the budget
- +4Structure: 18 headings
- +3Step-by-step instructions: 20 items
- +4Has examples (8 code blocks)
- +4Reference files are cited in the instructions (1 of 1)
Quality base 70; lint remarks subtract, signals add up to 100. Result: 73.