new
Create a new project to start development quickly
47
50%
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Critical
Do not install without reviewing
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tessl review fix ./lib/clacky/default_skills/new/SKILL.mdSecurity
3 findings: 2 critical severity, 1 medium severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E005: Suspicious download URL detected in skill instructions.
What this means
Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.
Why it was flagged
The GitHub repository URL is potentially suspicious because the installation script clones and runs template code from an external/third-party GitHub account (unknown maintainer) which can execute arbitrary code; the localhost URL is benign (local development server).
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
The workflow poses a high supply-chain / RCE/backdoor risk: it clones and executes code from a remote template, runs a local installer script without prompting, and removes template provenance (.git), enabling execution of untrusted code and hiding its origin.
W013: Attempt to modify system services in skill instructions.
What this means
The skill prompts the agent to compromise the security or integrity of the user’s machine by modifying system-level services or configurations, such as obtaining elevated privileges, altering startup scripts, or changing system-wide settings.
Why it was flagged
The skill explicitly instructs executing a setup script that "automatically installs missing dependencies" including system-level packages (Ruby, Node.js, PostgreSQL) and runs commands that modify the working directory and system state, which can change or install system software and services without user confirmation.
Low
Low-risk findings.
1 low severity finding. Worth noting, but not necessarily harmful.
W012: Unverifiable external dependency detected (runtime URL that controls agent).
What this means
The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.
Why it was flagged
The runtime script performs git clone of https://github.com/clacky-ai/rails-template-7x-starter.git to fetch template files that are moved into the workspace and later executed (e.g., ./bin/setup), so remote code is fetched at runtime and can execute locally.
- Repository
- clacky-ai/openclacky
- Commit
4aea278
- Audited
- Security analysis
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