Claude Code, Skill
Knack Cli
Knack Cli, a skill listed in the PlugVet directory.
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.
Pattern found, check before installing
The checks matched a pattern that needs a closer look. It does not mean the code is harmful. Read the quoted lines below.
- AGENT_HIDDEN_STEP High
instruction in an agent instruction file without defensive wording
INSTALL_REMOTE_SCRIPT AGENT_HIDDEN_STEP
Why this grade
- INSTALL_REMOTE_SCRIPT High
Fetches a script from the network and runs it (a pipe to a shell, or an install hook with a URL).
install.sh, line 5
# curl -fsSL https://knack.ai/install | sh - AGENT_HIDDEN_STEP High
Text tells the agent to hide a step or not to tell the user.
skills/interview/intuition.md, line 60
- Don't tell the user how many scenarios are left unless they ask.
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
Pass
No shell or command execution found, and no extra permission was declared.
Install and update
Serious
install fetches a script from the network. The docs document an installer that pipes a download into a shell.
INSTALL_REMOTE_SCRIPT INSTALL_DOCUMENTED_INSTALLER
README.md, line 35
curl -fsSL https://getknack.ai/install | sh
install.sh, line 5
# curl -fsSL https://knack.ai/install | sh
install.sh, line 6
# curl -fsSL https://knack.ai/install | sh -s -- --version 0.5.0
Show more
install.sh, line 7
# curl -fsSL https://knack.ai/install | sh -s -- --bin-dir /custom/path
install.sh, line 153
echo "To uninstall later: curl -fsSL https://knack.ai/uninstall.sh | sh"
crates/knack/embedded/cli-docs/agent-integration.md, line 442
the end of `curl -fsSL https://getknack.ai/install | sh` (and the
crates/knack/embedded/cli-docs/getting-started.md, line 5
curl -fsSL https://getknack.ai/install | sh
crates/knack/src/commands/uninstall.rs, line 258
println!(" curl -fsSL {UNINSTALL_SH_URL} | sh");
crates/knack/src/commands/uninstall.rs, line 275
"curl -fsSL https://getknack.ai/uninstall | sh"
crates/knack/src/commands/upgrade.rs, line 5
//! * macOS / Linux: `curl -fsSL https://getknack.ai/install | sh`
crates/knack/src/commands/upgrade.rs, line 27
const INSTALL_SH_CMD: &str = "curl -fsSL https://getknack.ai/install | sh";
skills/installer/SKILL.md, line 26
curl -fsSL https://knack.ai/install | sh
crates/knack/embedded/agent.txt, line 113
curl -fsSL https://getknack.ai/install | sh
crates/knack/embedded/agent.txt, line 161
curl -fsSL https://getknack.ai/install | sh
crates/knack/embedded/agent.txt, line 203
macOS / Linux: curl -fsSL https://getknack.ai/install | sh
crates/knack/embedded/agent.txt, line 350
run `curl -fsSL https://getknack.ai/install | sh` in this
crates/knack/embedded/agent.txt, line 376
curl -fsSL https://getknack.ai/install | sh
crates/knack/embedded/agent.txt, line 1780
macOS/Linux: curl -fsSL https://getknack.ai/uninstall | sh
Network
Concern
can reach api.github.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
install.sh, line 90
tag="$(curl -fsSL "https://api.github.com/repos/${GH_REPO}/releases/latest" \
install.sh, line 110
curl -fsSL "$url" -o "$tmp/$archive"
crates/knack/src/http.rs, line 108
match http.get(&url).send().await {
Show more
crates/knack/src/api/mod.rs, line 412
let mut rb = self.http.request(method, self.url(path));
crates/knack/src/api/mod.rs, line 421
self.http.request(method, self.url(path))
crates/knack/src/commands/export.rs, line 281
match http.get(url).send().await {
Secrets
Concern
reads a credential or environment file.
SECRETS_PATH_DOTENV
crates/knack/embedded/agent.txt, line 649
already use: 1Password CLI, `.env.local` + direnv, their shell rc,
crates/knack/embedded/agent.txt, line 874
# whatever they already use (1Password CLI, .env.local, direnv,
crates/knack/embedded/agent.txt, line 920
OUTSIDE those canonical paths (e.g. a stray `.env` at the folder root, a
Show more
crates/knack/embedded/agent.txt, line 1129
- "Add to your .env.local and `direnv allow`?"
Agent instructions
Serious
instructions tell the agent to hide a step.
AGENT_HIDDEN_STEP
skills/interview/intuition.md, line 60
- Don't tell the user how many scenarios are left unless they ask.
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 ce383ca56b0a. install fetches a script from the network. The docs document an installer that pipes a download into a shell. can reach api.github.com. The description does not name that host. can reach a host that is not written as a fixed address. reads a credential or environment file. instructions tell the agent to hide a step.
Date and source
Date checked:
github.com
Commit graded: ce383ca56b0a9c599eae0bdef92c1288592abafb
This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.