Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Kenning Encounter

Encounter driven, temporally constituted persistent memory for an LLM, backed by Neo4j. An MCP server that lets a model accumulate what it learns about a subject across many separate sessions, recall it on re-entry, and reason over it — with the graph's integrity enforced by

Compatibility: Not stated.

Grade C

One Medium finding. Read the report before installing.

Graded by PlugVetRubric v2

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

PERMISSION_SHELL_UNDECLARED

Why this grade

  • PERMISSION_SHELL_UNDECLARED Medium

    Runs shell commands that the manifest or description does not mention.

    scripts/kenning_encounter_install_hooks.py, line 48 r = subprocess.run(["git", "-C", str(repo), *args], capture_output=True, text=True)

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

    requests shell access. No manifest field names shell or command execution.

    PERMISSION_SHELL_UNDECLARED

    scripts/kenning_encounter_install_hooks.py, line 48

    r = subprocess.run(["git", "-C", str(repo), *args], capture_output=True, text=True)

    scripts/kenning_encounter_install_hooks.py, line 72

    r = subprocess.run(["git", "-C", str(repo), "show", f"{commit}:scripts/{name}"],

    scripts/kenning_encounter_session_start_hook.py, line 59

    r = subprocess.run(["git", "-C", repo, *args], capture_output=True,

    Show more

    scripts/matcher_t0.py, line 412

    r = subprocess.run(["docker", "cp", f"{args.container}:{src}", str(dst)],

    scripts/matcher_voices_report.py, line 79

    r = subprocess.run(

  • 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/kenning_encounter_infuse_hook.py, line 256

    with urllib.request.urlopen(req, timeout=TIMEOUT_S) as resp:

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    scripts/build_meaning_sidecar.py, line 57

    env_path = REPO / ".env"

    scripts/build_meaning_sidecar.py, line 131

    print(f"{key_env} not set (env or .env)", file=sys.stderr)

    scripts/build_meaning_sidecar.py, line 142

    os.environ.get("NEO4J_PASSWORD")

    Show more

    scripts/build_meaning_sidecar.py, line 143

    or os.environ.get("NEO4J_KENNING_ENCOUNTER_PASSWORD") or ""

    scripts/matcher_order_probe.py, line 33

    GEMINI_API_KEY is read from the environment, else from ./.env.

    scripts/matcher_order_probe.py, line 58

    key = os.environ.get("GEMINI_API_KEY", "")

    scripts/matcher_order_probe.py, line 61

    env = Path(".env")

    scripts/matcher_order_probe.py, line 92

    print("GEMINI_API_KEY not set (env or ./.env) - nothing measured.")

    scripts/matcher_t0.py, line 393

    env_path = REPO / ".env"

    scripts/matcher_voices_report.py, line 64

    env_path = REPO / ".env"

    scripts/matcher_voices_report.py, line 108

    password = os.environ.get("NEO4J_PASSWORD") or os.environ.get("NEO4J_KENNING_ENCOUNTER_PASSWORD") or ""

    src/kenning_encounter/migrate.py, line 161

    ap.add_argument("--password", default=os.getenv("NEO4J_PASSWORD", ""))

    src/kenning_encounter/migrate_thread.py, line 358

    ap.add_argument("--password", default=os.getenv("NEO4J_PASSWORD", ""))

    src/kenning_encounter/utils.py, line 135

    or os.getenv("NEO4J_PASSWORD")

    src/kenning_encounter/utils.py, line 221

    config["matcher_api_key"] = os.getenv("GEMINI_API_KEY") or ""

    .dockerignore, line 13

    mermaid/

  • 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.

Get the full report on this tool, £49

Note

Hygiene check of commit 06b6bb7861b8. requests shell access. No manifest field names shell or command execution. 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: 06b6bb7861b8d80a4233489d93effc0cc63d1378

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Read how this letter is chosen