registry / @mulmoclaude/core / 4.9.0

@mulmoclaude/core@4.9.0

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 1mo ago · by lpm-firewall-ai

The package has a concrete runtime path that installs remotely obtained skill content into a project AI-agent control surface. It lacks install hooks, self-dependency, obfuscation, credential exfiltration, or an unconsented automatic mutation chain, so the appropriate result is a warning rather than a block.

Static reason

One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source

Trigger

A host invokes collection import for a selected registry author and slug.

Impact

Imported content can define capabilities exposed to the Claude CLI within that project.

Mechanism

Downloads a collection bundle and mirrors allowlisted files into .claude/skills.

AI rationale

Evidence

dist/collection/registry/server/index.jsdist/skill-bridge/index.jsdata/skills/<slug>/<workspaceRoot>/.claude/skills/<slug>/

Network endpoints4

receptron.github.ioraw.githubusercontent.comasia-northeast1-mulmoserver.cloudfunctions.nethuggingface.co

Decision evidence

public snapshot

AI called this Suspicious at 89.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

A runtime collection import downloads a selected bundle and mirrors allowlisted files into a Claude skill directory.
The skill bridge writes staged skill content into the project .claude/skills control surface.
The package contains runtime network clients for registry imports, feeds, OAuth, and model downloads.

Evidence against

package.json has no preinstall, install, postinstall, or self-dependency.
The skill bridge restricts slugs and mirrored file paths to an allowlist.
Feed retrieval rejects non-HTTP URLs and private or loopback destinations.
OAuth broker calls require HTTPS except for loopback testing.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsMinifiedTelemetryUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

4 flagged

dist/discovery-2TvulIz8.cjsView file

Lines 1431-1471javascript

1431}

1432/** Return a path DuckDB can read as UTF-8: the original file when it

1433* already is UTF-8 (the cheap, common case — only the head is sniffed),

1434* else a decoded cache copy (see `decodeToCache`). Returns null when

1435* there is no readable file (missing, symlink, or containment-refused —

1436* see `safeCsvStat`), which callers render as an empty collection. */

1437async function ensureUtf8CsvPath(absPath, workspaceRoot) {

1438 const info = await safeCsvStat(absPath, workspaceRoot);

1439 if (info === null) return null;

1440 const head = await readHead(absPath, SNIFF_BYTES);

1441 const sample = head.length === SNIFF_BYTES ? head.subarray(0, 1048573) : head;

1442 if (!(head.length >= 2 && (head[0] === 255 && head[1] === 254 || head[0] === 254

1443 return decodeToCache(absPath, info);

1444}

1445var instancePromise = null;

1446/** Lazily create one shared in-memory DuckDB instance. The dynamic import

1447* keeps the native module OUT of core's load path — a platform where the

1448* prebuilt binding is missing degrades to a per-query error on dataSource

1449* collections only, never a broken core. A failed init is retried on the

1450* next call (the promise is reset). */

1451async function duckDbInstance() {

1452 if (instancePromise === null) instancePromise = import("@duckdb/node-api").then((mod) => mod.DuckDBInstance.create(":memory:"));

1453 try {

High

Copied Package Dependency Bridge

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

dist/discovery-2TvulIz8.cjsView on unpkg · L1451

1454 return await instancePromise;

1455 } catch (err) {

1456 instancePromise = null;

1457 throw new BackendUnavailableError(`DuckDB is unavailable on this host (@duckdb/node-api failed to load: ${String(err)}) — dataSource collections cannot be read`);

1458 }

1459}

1460async function queryCsv(sql, params) {

1461 const connection = await (await duckDbInstance()).connect();

1462 try {

1463 return (await connection.runAndReadAll(sql, params)).getRowObjectsJS();

1464 } finally {

1465 connection.disconnectSync();

1466 }

1467}

1468async function csvList(absPath, primaryKey, workspaceRoot) {

1469 const utf8Path = await ensureUtf8CsvPath(absPath, workspaceRoot ?? getWorkspaceRoot());

1470 if (utf8Path === null) return {

1471 items: [],

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]/; function dataskilldir(workspaceroot, slug) {

High

Trigger Reachable External Ai Agent Control Surface Mutation

Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface.

dist/skill-bridge/index.jsView on unpkg

dist/promptSafety-Cv-SoTd4.cjs#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/promptSafety-Cv-SoTd4.cjs#virtual:normalized:round1View on unpkg

dist/feeds/server/index.cjsView file

•matchType = previous_version_dangerous_delta matchedPackage = @mulmoclaude/core@4.7.0 matchedIdentity = npm:QG11bG1vY2xhdWRlL2NvcmU:4.7.0 similarity = 0.858 summary = stored previous version shares package body but lacks this dangerous source file

High

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/feeds/server/index.cjsView on unpkg

Source & flagged code

4 flagged · loading source

dist/discovery-2TvulIz8.cjsView file

1451package = @mulmoclaude/core; repositoryIdentity = mulmoclaude; dependency = @duckdb/node-api L1451: async function duckDbInstance() { L1452: if (instancePromise === null) instancePromise = import("@duckdb/node-api").then((mod) => mod.DuckDBInstance.create(":memory:")); L1453: try {

High

Copied Package Dependency Bridge

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

dist/discovery-2TvulIz8.cjsView on unpkg · L1451

dist/skill-bridge/index.jsView file

Findings

4 High3 Medium5 Low

HighCopied Package Dependency Bridgedist/discovery-2TvulIz8.cjs

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

HighSemantic Analysis Limiteddist/promptSafety-Cv-SoTd4.cjs#virtual:normalized:round1

HighPrevious Version Dangerous Deltadist/feeds/server/index.cjs

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowTelemetry

LowUrl Strings

Affected versions and remediation

This report applies to @mulmoclaude/core@4.9.0.

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

Review the evidence and your use of @mulmoclaude/core@4.9.0 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: 2026-09-12 11:28:47.399Z (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