Claude Code, Skill
Kotlin Footguns
Battle-tested agent skills mapping the footguns of Kotlin, Compose Multiplatform and the desktop JVM — mined from a production music app, not from documentation.
Compatibility: Not stated.
Grade B
Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit dfcbe3208170.
NETWORK_NO_FIXED_HOST PERMISSION_SHELL_DECLARED
Why this grade
- NETWORK_NO_FIXED_HOST Low
Makes a network call whose host is not written as a fixed address.
skills/compose-visuals-footguns/references/material-symbols-icon-system.md, line 41
curl -sfL --compressed \ - PERMISSION_SHELL_DECLARED Note
Runs shell commands, and the manifest or description says so.
skills/footgun-scan/scripts/scan.py, line 428
return subprocess.run(["git", *args], capture_output=True, text=True, check=True).stdout
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Note
requests shell access. The manifest names this permission.
PERMISSION_SHELL_DECLARED
skills/footgun-scan/scripts/scan.py, line 428
return subprocess.run(["git", *args], capture_output=True, text=True, check=True).stdout
Install and update
Pass
No install-time script found, and dependencies are pinned or absent.
Network
Concern
can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST
skills/compose-visuals-footguns/references/material-symbols-icon-system.md, line 41
curl -sfL --compressed \
skills/data-layer-footguns/references/remote-index-cached-as-rows-with-validator.md, line 105
curl -sIL "$INDEX_URL" | grep -iE 'content-length|etag|last-modified' # uncompressed: the true size
skills/data-layer-footguns/references/remote-index-cached-as-rows-with-validator.md, line 111
etag=$(curl -sIL --compressed "$INDEX_URL" | grep -i '^etag:' | cut -d' ' -f2- | tr -d '\r')
Show more
skills/data-layer-footguns/references/remote-index-cached-as-rows-with-validator.md, line 112
curl -sL --compressed -o /dev/null -w '%{http_code} %{size_download}\n' -H "If-None-Match: $etag" "$INDEX_URL"
skills/data-layer-footguns/references/remote-index-cached-as-rows-with-validator.md, line 113
curl -sL --compressed -o /dev/null -w '%{http_code} %{size_download}\n' -H 'If-None-Match: "x"' "$INDEX_URL"
skills/remote-api-footguns/references/curl-logger-ktor-plugin.md, line 19
/** Drop `Accept-Encoding` and append `--compressed` so curl decodes the response itself. */
skills/remote-api-footguns/references/curl-logger-ktor-plugin.md, line 47
parts += "curl -X ${request.method.value}"
skills/remote-api-footguns/references/curl-logger-ktor-plugin.md, line 52
if (lower == contentLengthName) return@forEach // let curl recompute it
Secrets
Pass
No read of a credential file or secret environment variable found.
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Pass
No encoded or minified payload found.
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit dfcbe3208170. requests shell access. The manifest names this permission. can reach a host that is not written as a fixed address.
Date and source
Date checked:
github.com
Commit graded: dfcbe32081705bbe2aeefef830b9adeb67bec438
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