registry / @mulmoclaude/core / 4.4.2

@mulmoclaude/core@4.4.2

Shared server-side core for MulmoClaude and MulmoTerminal — the always-shipped-together subsystems consolidated behind subpath exports so the two hosts can't drift. Server-only except the browser-safe ./artifacts, ./whisper/client, ./workspace-setup/slug,

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The package contains a real project-scoped Claude skill installation capability, so it warrants a warning under the agent-extension lifecycle policy. Source inspection found no install hook or concrete malicious behavior.

Static reason

One or more suspicious static signals were detected.

Trigger

Host/user invokes collection registry import with mirroring enabled.

Impact

Imported skill instructions and allowed templates become available to Claude in that project.

Mechanism

Allowlisted remote skill-bundle mirroring into a project Claude skills directory.

AI rationale

Evidence

package.jsondist/skill-bridge/index.jsdist/collection/registry/server/index.jsdata/skills/<slug>/SKILL.mddata/skills/<slug>/schema.json.claude/skills/<slug>/SKILL.md.claude/skills/<slug>/schema.json

Network endpoints2

receptron.github.io/mulmoclaude-collections/index.jsonraw.githubusercontent.com/receptron/mulmoclaude-collections/main

Decision evidence

public snapshot

AI called this Suspicious at 86.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

Runtime skill bridge mirrors allowlisted staged skill files into <workspace>/.claude/skills/<slug>.
Registry import can download a collection bundle and, when configured, mirror it into the Claude skills directory.
This is an agent-extension lifecycle capability, not install-time malware.

Evidence against

package.json has no preinstall, install, postinstall, or other lifecycle hook.
The bridge restricts slugs and file paths to an allowlist; no broad Claude configuration write was found.
No credential harvesting, environment exfiltration, eval/vm execution, or covert network beacon was found.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsMinifiedTelemetryUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

4 flagged

dist/discovery-P64fgtuD.jsView file

Lines 1416-1456javascript

1416}

1417/** Return a path DuckDB can read as UTF-8: the original file when it

1418* already is UTF-8 (the cheap, common case — only the head is sniffed),

1419* else a decoded cache copy (see `decodeToCache`). Returns null when

1420* there is no readable file (missing, symlink, or containment-refused —

1421* see `safeCsvStat`), which callers render as an empty collection. */

1422async function ensureUtf8CsvPath(absPath, workspaceRoot) {

1423 const info = await safeCsvStat(absPath, workspaceRoot);

1424 if (info === null) return null;

1425 const head = await readHead(absPath, SNIFF_BYTES);

1426 const sample = head.length === SNIFF_BYTES ? head.subarray(0, 1048573) : head;

1427 if (!(head.length >= 2 && (head[0] === 255 && head[1] === 254 || head[0] === 254

1428 return decodeToCache(absPath, info);

1429}

1430var instancePromise = null;

1431/** Lazily create one shared in-memory DuckDB instance. The dynamic import

1432* keeps the native module OUT of core's load path — a platform where the

1433* prebuilt binding is missing degrades to a per-query error on dataSource

1434* collections only, never a broken core. A failed init is retried on the

1435* next call (the promise is reset). */

1436async function duckDbInstance() {

1437 if (instancePromise === null) instancePromise = import("@duckdb/node-api").then((mod) => mod.DuckDBInstance.create(":memory:"));

1438 try {

High

Copied Package Dependency Bridge

Package metadata claims a different repository identity while copied source loads a runtime dependency bridge.

dist/discovery-P64fgtuD.jsView on unpkg · L1436

1439 return await instancePromise;

1440 } catch (err) {

1441 instancePromise = null;

1442 throw new BackendUnavailableError(`DuckDB is unavailable on this host (@duckdb/node-api failed to load: ${String(err)}) — dataSource collections cannot be read`);

1443 }

1444}

1445async function queryCsv(sql, params) {

1446 const connection = await (await duckDbInstance()).connect();

1447 try {

1448 return (await connection.runAndReadAll(sql, params)).getRowObjectsJS();

1449 } finally {

1450 connection.disconnectSync();

1451 }

1452}

1453async function csvList(absPath, primaryKey, workspaceRoot) {

1454 const utf8Path = await ensureUtf8CsvPath(absPath, workspaceRoot ?? getWorkspaceRoot());

1455 if (utf8Path === null) return {

1456 items: [],

dist/skill-bridge/index.jsView file

Lines 1-25javascript

1import { t as isSafeActionTemplatePath } from "../templatePath-k_WNbL_Q.js";

2import { mkdirSync, readFileSync, renameSync, rmSync, writeFileSync } from "node:fs";

3import path from "node:path";

4//#region src/skill-bridge/index.ts

Source & flagged code

4 flagged · loading source

dist/discovery-P64fgtuD.jsView file

1436package = @mulmoclaude/core; repositoryIdentity = mulmoclaude; dependency = @duckdb/node-api L1436: async function duckDbInstance() { L1437: if (instancePromise === null) instancePromise = import("@duckdb/node-api").then((mod) => mod.DuckDBInstance.create(":memory:")); L1438: try {

High

Copied Package Dependency Bridge

Package metadata claims a different repository identity while copied source loads a runtime dependency bridge.

dist/discovery-P64fgtuD.jsView on unpkg · L1436

dist/skill-bridge/index.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. import { t as issafeactiontemplatepath } from "../templatepath-k_wnbl_q.js"; import { mkdirsync, readfilesync, renamesync, rmsync, writefilesync } from "node:fs"; import path from "node:path"; var data_skills_dir = path.join("data", "skills"); var claude_skills_dir = path.join(".claude", "skills"); var sk[redacted] = "skill.md"; var schema_filename = "schema.json"; var slug_re = /^[a-z0-9]+(-[a-z0-9]+)*$/; var rm_re = /^\s*rm\s+((?:-[a-za-z]+\s+)+)['"]?data\/skills\/([a-z0-9-]+)\/?['"]?\s*$/; var recursive_flag_re = /[rr]/; /** `<workspaceroot>/data/skills/<slug>` — the staging dir for a skill. */ function dataskilldir(workspaceroot, slug) {

Findings

2 High5 Medium5 Low

HighCopied Package Dependency Bridgedist/discovery-P64fgtuD.js

HighTrigger Reachable External Ai Agent Control Surface Mutationdist/skill-bridge/index.js

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

MediumAi Review Evidencedist/skill-bridge/index.js

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowTelemetry

LowUrl Strings

Affected versions and remediation

This report applies to @mulmoclaude/core@4.4.2.

See all versions of @mulmoclaude/core for other recorded verdicts.

Review the evidence and your use of @mulmoclaude/core@4.4.2 before allowing it. Restrict the permissions described in this report.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.

Evidence last updated: 2026-08-26 06:05:52.293Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Runtime surface

Behavioral surface

Source & flagged code