Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Context Zero Engine

A local code-intelligence engine for AI agents. ContextZero indexes a repository into a PostgreSQL-backed code graph and serves structured, token-budgeted context — symbols, dependencies, effects, contracts, similar code, and blast radius — over MCP and HTTP.

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 SECRETS_PATH_DOTENV SECRETS_ENV_READ OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    scripts/bench-corpus.mjs, line 52 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.

    scripts/lib/local-postgres.mjs, line 78 const socket = net.connect({ host: "127.0.0.1", port })

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    scripts/bootstrap.ps1, line 72 $envPath = Join-Path $RepoRoot ".env"

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    scripts/bench-report.ts, line 219 DB_PASSWORD: process.env.DB_PASSWORD || "postgres",

  • OBFUSCATION_FILE_OVER_READ_CAP Note

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

    package-lock.json, line 1 {

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

    scripts/bench-corpus.mjs, line 52

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

    scripts/lib/local-postgres.mjs, line 150

    fs.rmSync(pwFile, { force: true })

  • Install and update

    Pass

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

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST

    scripts/lib/local-postgres.mjs, line 78

    const socket = net.connect({ host: "127.0.0.1", port })

    src/mcp-bridge/index.ts, line 196

    const entry = this.requests.get(toolName)

    src/analysis-engine/behavioral.ts, line 365

    // effects of the caller (a fixture file's axios.get showed up as a

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    scripts/bench-report.ts, line 219

    DB_PASSWORD: process.env.DB_PASSWORD || "postgres",

    scripts/bench-report.ts, line 522

    DB_PASSWORD: process.env.DB_PASSWORD || "postgres",

    scripts/bootstrap.ps1, line 72

    $envPath = Join-Path $RepoRoot ".env"

    Show more

    scripts/bootstrap.ps1, line 74

    Write-Host "Using existing .env: $envPath"

    scripts/bootstrap.ps1, line 80

    throw "Existing .env has a missing or weak DB_PASSWORD. Replace it with a strong generated value before Docker startup."

    scripts/bootstrap.ps1, line 83

    throw "Existing .env has missing or weak SCG_API_KEYS. Set at least one 32+ character API key before Docker startup."

    scripts/bootstrap.ps1, line 88

    throw "Existing .env must define 32+ character SCG_ADMIN_API_KEYS for Docker production mode."

    scripts/bootstrap.ps1, line 113

    Write-Host "Created Docker .env with generated secrets: $envPath"

    scripts/bootstrap.sh, line 114

    local env_path="$REPO_ROOT/.env"

    scripts/bootstrap.sh, line 116

    echo "Using existing .env: $env_path"

    scripts/doctor.mjs, line 72

    if (process.env.DB_HOST && process.env.DB_USER && process.env.DB_PASSWORD) {

    scripts/doctor.mjs, line 78

    password: process.env.DB_PASSWORD,

    scripts/doctor.mjs, line 89

    const apiKey = process.env.SCG_API_KEYS || crypto.randomBytes(32).toString("hex")

    scripts/doctor.mjs, line 90

    const adminApiKey = process.env.SCG_ADMIN_API_KEYS || crypto.randomBytes(32).toString("hex")

    scripts/run-real-db-tests.mjs, line 35

    password: process.env.DB_PASSWORD || "",

    scripts/setup.mjs, line 84

    password: process.env.DB_PASSWORD,

  • 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

    package-lock.json, line 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 d4979d339c2e. can delete files. 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: d4979d339c2e0eef37cc24b0e2462b12b34c5a7d

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Read how this letter is chosen