Grades are a hygiene check, not a security guarantee.

MCP, MCP server

capa

One capabilities.yaml wires skills, tools, rules, sub-agents, MCP servers, and plugins into Cursor, Claude Code, Codex, Windsurf, GitHub Copilot, and 30+ other AI coding agents

Compatibility: Not stated.

Grade C

One Medium finding. Read the findings before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit 0263d849149f.

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).

    install.sh, line 112 curl -LsSf https://capa.sh/install.sh | sh

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

    src/cli/commands/sh/index.ts, line 140

    const cmd = group.commands.get(subSlug)!;

  • 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

    install.sh, line 112

    curl -LsSf https://capa.sh/install.sh | sh

    package.json, line 24

    @clack/prompts

    README.md, line 66

    curl -LsSf https://capa.sh/install.sh | sh

  • Network

    Concern

    can reach a host that is not written as a fixed address. can reach api.github.com. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    install.sh, line 27

    _version=$(curl -sSfL "https://api.github.com/repos/${GITHUB_REPO}/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed 's/^v//')

    install.sh, line 29

    _version=$(wget -qO- "https://api.github.com/repos/${GITHUB_REPO}/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed 's/^v//')

    install.sh, line 202

    # Download using curl or wget

    Show more

    install.sh, line 216

    elif [ "$_dld" = curl ]; then

    install.sh, line 217

    curl -sSfL "$1" -o "$2"

    install.sh, line 218

    elif [ "$_dld" = wget ]; then

    install.sh, line 219

    wget "$1" -O "$2"

    registries/claude-plugins/adapter.ts, line 84

    return await fetch(url, {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    src/server/auth-middleware.ts, line 20

    const envToken = process.env.CAPA_AUTH_TOKEN?.trim();

    src/server/auth-middleware.ts, line 154

    delete process.env.CAPA_AUTH_TOKEN;

    skills/capabilities-manager/references/commands.md, line 27

    capa install -e # Load variables from .env file

    Show more

    skills/capabilities-manager/references/commands.md, line 80

    # Create .env file

    skills/capabilities-manager/references/commands.md, line 81

    echo "BraveApiKey=your-api-key" > .env

    src/cli/index.ts, line 116

    .option('-e, --env [file]', 'Load variables from .env file (defaults to .env if no file specified)')

    src/cli/index.ts, line 169

    // Commander --env is already used for .env file; server env uses --env-var

    src/cli/index.ts, line 204

    .option('-e, --env [file]', 'Load variables from .env file (defaults to .env if no file specified)')

    src/cli/commands/install-tasks/context.ts, line 58

    /** Path to a .env file (or boolean true to use ./.env). Mirrors the existing API. */

    src/cli/commands/install-tasks/load-env.ts, line 16

    envFilePath = resolve(ctx.projectPath, '.env');

  • 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

    src/shared/activity-correlation-reconcile.ts, line 1

    /**

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit 0263d849149f. requests shell access. The manifest names this permission. install fetches a script from the network. can reach a host that is not written as a fixed address. can reach api.github.com. The description does not name that host. reads a credential or environment file. the file cap was reached before every file was read.

Date and source

Date checked:

View source

github.com

Commit graded: 0263d849149fec37c29005baeee29e8a1e6a071f

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.

Read how this letter is chosen