Grades are a hygiene check, not a security guarantee.

Claude Code, Skill

Agent Stack

Build agent loops, harnesses, evals and protocol boundaries that stay inspectable under production failure.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

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

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST SECRETS_PATH_DOTENV

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    bin/agent-stack.js, line 93 fs.rmSync(dest, { recursive: true, force: true });

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    plugins/agent-stack/skills/agent-harness/scripts/audit_agent.py, line 303 PY_HEADER + "r = requests.get('https://example.com')\n"),

  • NETWORK_UNNAMED_HOST Low

    Calls a fixed host that the description does not name.

    plugins/agent-stack/skills/agent-harness/scripts/audit_agent.py, line 303 PY_HEADER + "r = requests.get('https://example.com')\n"),

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .gitignore, line 14 # untracked-but-unignored .env at a sibling's repo root, one `git add -A`

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

    bin/agent-stack.js, line 93

    fs.rmSync(dest, { recursive: true, force: true });

    .github/workflows/validate.yml, line 881

    subprocess.run(

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach example.com. The description does not name that host. can reach your-host. The description does not name that host. can reach registry.modelcontextprotocol.io. 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

    plugins/agent-stack/skills/agent-harness/scripts/audit_agent.py, line 303

    PY_HEADER + "r = requests.get('https://example.com')\n"),

    plugins/agent-stack/skills/agent-harness/scripts/audit_agent.py, line 320

    "r = requests.get('https://example.com', timeout=5)\n"),

    plugins/agent-stack/skills/agent-harness/scripts/audit_agent.py, line 327

    "r = requests.get('https://example.com', timeout=5)\n"),

    Show more

    plugins/agent-stack/skills/agent-interop/references/mcp-ship.md, line 159

    curl -X POST https://your-host/mcp/ -H 'Content-Type: application/json' -d '{}'

    plugins/agent-stack/skills/agent-interop/references/mcp-ship.md, line 160

    curl -X POST https://your-host/mcp -H 'Content-Type: application/json' -d '{}'

    plugins/agent-stack/skills/agent-interop/references/mcp-ship.md, line 161

    curl -X POST https://your-host/mcp/mcp -H 'Content-Type: application/json' -d '{}'

    plugins/agent-stack/skills/agent-interop/references/registry.md, line 139

    curl "https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.my-username/weather"

    plugins/agent-stack/skills/agent-interop/references/registry.md, line 146

    curl -L "https://github.com/modelcontextproto

    CHANGELOG.md, line 547

    still be unsafe; adding a `fetch(url)` beside a private-data reader closes the triangle and

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .gitignore, line 10

    # agent-sync - local credentials and run state, never committed

    .gitignore, line 14

    # untracked-but-unignored .env at a sibling's repo root, one `git add -A`

    .gitignore, line 15

    # away from a public repository. The hole was open in all nine.

    Show more

    .gitignore, line 16

    .env

    .gitignore, line 18

    !.env.example

    docs/AGENT_SYNC.md, line 22

    - credentials read from `.env.agent-sync` in sshlg-skills - gitignored, never committed

    docs/evidence/research/2026-09-21-ecc-handoff.md, line 33

    | `npm pack --dry-run --json` | 40 files; new reference included; research, `.env`, `.agent-sync` and `.git` absent |

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • 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.

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Note

Hygiene check of commit b77522a867e5. can delete files. can reach example.com. The description does not name that host. can reach your-host. The description does not name that host. can reach registry.modelcontextprotocol.io. 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.

Date and source

Date checked:

View source

github.com

Commit graded: b77522a867e57db42a016840c788c9448c179e7c

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