Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Github Twin

Personal RAG over your GitHub history (commits, code, review comments), served to Claude Code over MCP.

Compatibility: Not stated.

Grade D

Two or more Medium findings, or a High finding. Only try it in a sandbox.

Graded by PlugVetRubric v2

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

Rescanned at commit a078be83beae, unchanged since the check below.

INSTALL_REMOTE_SCRIPT SECRETS_PATH_CREDENTIAL

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).

    getting_started.md, line 26 | **[Ollama](https://ollama.com)** | Local embeddings (default - skip if using the Gemini embedder) | `curl -fsSL https://ollama.com/install.sh \| sh` |

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    src/github_twin/gemini_client.py, line 55 # picked up from ~/.config/gcloud/application_default_credentials.json.

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

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    src/github_twin/cli.py, line 656

    r = subprocess.run(["gh", "auth", "token"], capture_output=True, text=True, timeout=5)

    src/github_twin/ingest/clone.py, line 81

    out = subprocess.run(

    src/github_twin/ingest/clone.py, line 312

    shutil.rmtree(d.path, ignore_errors=False)

    Show more

    src/github_twin/ingest/clone.py, line 344

    shutil.rmtree(tmp, ignore_errors=True)

    src/github_twin/ingest/github_client.py, line 47

    out = subprocess.run(["gh", "auth", "token"], capture_output=True, text=True, timeout=5)

  • 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

    getting_started.md, line 26

    | **[Ollama](https://ollama.com)** | Local embeddings (default - skip if using the Gemini embedder) | `curl -fsSL https://ollama.com/install.sh \| sh` |

    getting_started.md, line 27

    | **[`uv`](https://docs.astral.sh/uv/)** | Python project manager | `curl -LsSf https://astral.sh/uv/install.sh \| sh` |

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    src/github_twin/ingest/oauth.py, line 52

    resp = httpx.post(url, data=data, headers=headers, timeout=30.0)

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL

    src/github_twin/cli.py, line 660

    env_set = bool(os.environ.get("GITHUB_TOKEN"))

    src/github_twin/cli.py, line 1277

    if os.environ.get("GITHUB_TOKEN"):

    src/github_twin/gemini_client.py, line 55

    # picked up from ~/.config/gcloud/application_default_credentials.json.

    Show more

    src/github_twin/gemini_client.py, line 183

    os.environ.get("GEMINI_API_KEY")

    src/github_twin/gemini_client.py, line 184

    or os.environ.get("GOOGLE_API_KEY")

    src/github_twin/distill/synth.py, line 306

    has_claude = bool(os.environ.get("ANTHROPIC_API_KEY"))

    src/github_twin/eval/llm.py, line 112

    if not os.environ.get("ANTHROPIC_API_KEY"):

    src/github_twin/eval/llm.py, line 127

    if os.environ.get("ANTHROPIC_API_KEY"):

    src/github_twin/ingest/github_client.py, line 74

    tok = _stored_oauth_token() or _gh_cli_token() or os.environ.get("GITHUB_TOKEN")

    .gitignore, line 16

    config.toml

    CLAUDE.md, line 295

    `~/.config/gcloud/application_default_credentials.json` and never

    README.md, line 193

    `~/.config/gcloud/application_default_credentials.json` and is refreshed

  • Agent instructions

    Pass

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

  • Obfuscation

    Note

    a file was over the read cap and was not fully read.

    OBFUSCATION_FILE_OVER_READ_CAP

    uv.lock, line 1

    version = 1

  • 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 a078be83beae. can delete files. install fetches a script from the network. The docs document an installer that pipes a download into a shell. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: a078be83beae606725e48fe10227c6b7a5020662

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