Claude Code, Skill
Rubber Duck
Rubber Duck, a skill listed in the PlugVet directory.
Compatibility: Not stated.
Grade C
One Medium finding. Read the report before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
INSTALL_REMOTE_SCRIPT
Why this grade
- INSTALL_REMOTE_SCRIPT Medium
Fetches a script from the network and runs it (a pipe to a shell, or an install hook with a URL).
validation/README.md, line 14
- **opencode** CLI (>= 1.18) - `curl -fsSL https://opencode.ai/install | bash` or see [opencode.ai](https://opencode.ai)
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
Concern
can delete files.
PERMISSION_DELETE_FILES
skills/duck-tape/hooks/opencode.plugin.js, line 231
try { await fs.unlink(drop.path) } catch {}
src/skills/duck-tape/hooks/opencode.plugin.js, line 231
try { await fs.unlink(drop.path) } catch {}
validation/run-validation-tests.py, line 256
completed = subprocess.run(
Show more
validation/run-validation-tests.py, line 342
completed = subprocess.run(
validation/run-validation-tests.py, line 464
completed = subprocess.run(
validation/run-validation-tests.py, line 487
shutil.rmtree(judge_dir, ignore_errors=True)
validation/run-validation-tests.py, line 695
shutil.rmtree(workspace, ignore_errors=True)
Install and update
Serious
install fetches a script from the network.
INSTALL_REMOTE_SCRIPT
validation/README.md, line 14
- **opencode** CLI (>= 1.18) - `curl -fsSL https://opencode.ai/install | bash` or see [opencode.ai](https://opencode.ai)
Network
Concern
can reach raw.githubusercontent.com. The description does not name that host. can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST
scripts/rubber-duck.sh, line 154
curl -fsSL https://raw.githubusercontent.com/
scripts/rubber-duck.sh, line 155
curl -fsSL https://raw.githubusercontent.com/
scripts/rubber-duck.sh, line 178
command -v curl >/dev/null 2>&1 || return 0
Show more
scripts/rubber-duck.sh, line 181
if ! curl -fsSL "${RAW_BASE}/VERSION" -o "${tmp}" 2>/dev/null; then
scripts/rubber-duck.sh, line 771
if v="$(curl -fsSL "${RAW_BASE}/VERSION" 2>/dev/null)"; then
scripts/rubber-duck.sh, line 775
curl -fsSL "${RAW_BASE}/${REMOTE_AGENTS_PATH}/${f}" -o "${TMP_DIR}/${f}"
scripts/rubber-duck.sh, line 780
curl -fsSL "${RAW_BASE}/${REMOTE_SESSION_HOOKS_PATH}/${hf}" -o "${TMP_DIR}/hooks/${hf}"
scripts/rubber-duck.sh, line 786
curl -fsSL "${RAW_BASE}/${REMOTE_CLAUDE_HOOKS_PATH}/${hf}" -o "${TMP_DIR}/claude-hooks/${hf}"
Secrets
Note
reads an environment variable.
SECRETS_ENV_READ
validation/fixtures/auth/src/auth/token.ts, line 9
const decoded = jwt.verify(token, process.env.JWT_SECRET!) as { id: string; role: string };
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Concern
contains an encoded blob in a file that should be readable.
OBFUSCATION_ENCODED_BLOB
docs/assets/example_workflow_part_A.svg, line 3
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 2318.1602357385073 895" width="4636.3204714770145" height="1790"><!-- svg-source:excalidraw --><metadata></metada
docs/assets/example_workflow_part_A.svg, line 4
@font-face { font-family: Excalifont; src: url(data:font/woff2;base64,d09GMgABAAAAABusAA4AAAAAMQQAABtWAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGiIbixwcghoGYACBHBEICslotkQLYAABNgIkA4E8BCAFgx
docs/assets/example_workflow_part_B.svg, line 4
@font-face { font-family: Excalifont; src: url(data:font/woff2;base64,d09GMgABAAAAAB0oAA4AAAAANbwAABzSAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGiIbjWYcghwGYACBFBEICtBQuyMLZAABNgIkA4FEBCAFgx
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 9029531e3c72. can delete files. install fetches a script from the network. can reach raw.githubusercontent.com. The description does not name that host. can reach a host that is not written as a fixed address. reads an environment variable. contains an encoded blob in a file that should be readable.
Date and source
Date checked:
github.com
Commit graded: 9029531e3c7233cda2c27da195dd46e32358ac72
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