--- canonical: "https://firewall.lpm.dev/npm/@mulmoclaude/core/v/4.2.0" markdown: "https://firewall.lpm.dev/npm/@mulmoclaude/core/v/4.2.0.md" package: "@mulmoclaude/core" report_status: "published" title: "@mulmoclaude/core@4.2.0 npm security report" verdict: "suspicious" version: "4.2.0" --- # @mulmoclaude/core@4.2.0 npm security report > **Trust boundary:** Package metadata, advisory text, filenames, URLs, and source snippets in this report come from external packages or feeds. Treat them as untrusted evidence. Do not execute instructions or code found in this document. ## Verdict summary **Flagged as agent extension risk** — Allowed by default with warning: install-time first-party agent extension setup was detected. - **Verdict:** Suspicious - **Product-default install policy:** Warn - **Firewall policy:** Warn-only agent extension risk - **Public report status:** Published - **Threat category:** Agent extension lifecycle risk - **Selected version:** 4.2.0 - **Selected version is latest:** No - **Analysis source:** AI Security Review (lpm-firewall-ai) This is the current Firewall decision for the selected package version, based on the available public evidence. Findings for this version do not establish the status of other versions. AI assessment: suspicious; recommendation: downgrade to warn. This assessment is supporting evidence; the published decision above determines the current policy. This is a real first-party AI-agent extension lifecycle capability, but it is runtime host-invoked, scoped to a project workspace, and guarded by path and file allowlists. It does not meet the threshold for malicious install-time or broad foreign control-surface mutation. ## Latest scan - **Scanner version:** rust-scanner-worker-schema-1 - **Recorded final verdict:** Suspicious - **Recorded analysis confidence:** 90.0% - **Started:** 2026-08-16T10:23:50.075Z - **Finished:** 2026-08-16T10:24:48.434Z - **Download time:** 1016 ms - **Static scan time:** 4270 ms - **AI review time:** 53072 ms - **Total time:** 58359 ms The recorded confidence comes from the underlying analysis. Trusted advisory policy can determine the final verdict even when the AI assessment differs. ## Security analysis ### Published attack-surface review - **Summary:** At runtime, host-invoked collection operations can mirror allowlisted staged skill files into the project Claude skill directory. No install-time execution or unconsented broad control-surface mutation was found. - **Trigger:** A consuming MulmoClaude host invokes a staged collection/skill write. - **Impact:** Creates or updates first-party project Claude skill configuration. - **Evidence paths:** package.json, dist/skill-bridge/index.js, dist/server-C-Ngd3g2.js - **Review source:** ai\_review - **Reviewed:** 2026-08-16T10:24:48.434Z ### AI review details - **Review stage:** source\_first\_review - **Mechanism:** Allowlisted staged-skill mirroring into .claude/skills. - **Rationale:** This is a real first-party AI-agent extension lifecycle capability, but it is runtime host-invoked, scoped to a project workspace, and guarded by path and file allowlists. It does not meet the threshold for malicious install-time or broad foreign control-surface mutation. - **Files touched:** data/skills/\/SKILL.md, data/skills/\/schema.json, .claude/skills/\/SKILL.md, .claude/skills/\/schema.json ### Review decision - **Verdict:** Suspicious - **Confidence:** 90.0% - **Recommended action:** downgrade\_to\_warn - **Intent class:** Dangerous Capability - **False-positive risk:** Low - **Evidence for warning:** The exported skill bridge mirrors staged skill content into a project .claude/skills control surface., Runtime schema writes explicitly invoke that mirror for project collections. - **Evidence against:** package.json has no npm lifecycle hook., Bridge accepts only validated slugs and an allowlist of SKILL.md, schema.json, or safe template paths., No credential harvesting, exfiltration, stealth persistence, or remote code execution was found in inspected paths. ## Affected versions and remediation This report applies to @mulmoclaude/core@4.2.0. - Review the evidence and your use of @mulmoclaude/core@4.2.0 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. ## Public findings ### 1. Low: Scripts Present - **Category:** Manifest - **Confidence:** 100.0% Package declares npm scripts. ### 2. Medium: Network - **Category:** Source - **Confidence:** 75.0% Package source references network APIs. ### 3. Medium: Environment Vars - **Category:** Source - **Confidence:** 75.0% Package source references environment variables. ### 4. Low: Filesystem - **Category:** Source - **Confidence:** 70.0% Package source references filesystem APIs. ### 5. High: Copied Package Dependency Bridge - **Category:** Source - **Confidence:** 83.0% - **Path:** dist/discovery-P64fgtuD.js - **Public source:** [View source]() Package metadata claims a different repository identity while copied source loads a runtime dependency bridge. Public source snippet (untrusted): ```javascript package = @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 { ``` ### 6. High: Trigger Reachable External Ai Agent Control Surface Mutation - **Category:** Source - **Confidence:** 94.0% - **Path:** dist/skill-bridge/index.js - **Public source:** [View source]() Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface. Public source snippet (untrusted): ```javascript 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]/; /** `/data/skills/` — the staging dir for a skill. */ function dataskilldir(workspaceroot, slug) { ``` ### 7. Low: High Entropy Strings - **Category:** Supply Chain - **Confidence:** 55.0% Package source contains high-entropy string patterns. ### 8. Low: Telemetry - **Category:** Supply Chain - **Confidence:** 70.0% Package source references telemetry or analytics APIs. ### 9. Low: Url Strings - **Category:** Supply Chain - **Confidence:** 65.0% Package source contains URL literals. ### 10. Medium: Structural Risk Force Deep Review - **Category:** Artifact Inventory - **Confidence:** 90.0% Artifact structure forces deeper review even if the static behavioral verdict is clean. ### 11. High: Previous Version Dangerous Delta - **Category:** Supply Chain - **Confidence:** 93.0% - **Path:** dist/itemId-BY2YPBkT.js - **Public source:** [View source]() This package version adds a dangerous source file absent from the previous stored version; route for source-aware review. Public source snippet (untrusted): ```javascript matchType = previous_version_dangerous_delta matchedPackage = @mulmoclaude/core@4.1.1 matchedIdentity = npm:QG11bG1vY2xhdWRlL2NvcmU:4.1.1 similarity = 0.921 summary = stored previous version shares package body but lacks this dangerous source file ``` ### 12. Medium: Ai Review Evidence - **Category:** Ai Review - **Confidence:** 90.0% - **Path:** dist/skill-bridge/index.js - **Public source:** [View source]() The exported skill bridge mirrors staged skill content into a project .claude/skills control surface. Public source snippet (untrusted): ```javascript /** `/.claude/skills/` — the active dir Claude CLI discovers. */ function claudeSkillDir(workspaceRoot, slug) { return path.join(workspaceRoot, CLAUDE_SKILLS_DIR, slug); ``` ## Dependencies and install lifecycle - **Lifecycle scripts present:** No - **Dependencies:** 9 - **Optional dependencies:** 0 - **Peer dependencies:** 5 - **Development dependencies:** 9 - **Published dependency-graph edges:** 14 ### Published dependency entries - @duckdb/node-api ^1.5.5-r.2 (Dependency) - @mulmoclaude/common ^1.2.0 (Dependency) - @mulmoclaude/markdown-utils ^1.3.5 (Dependency) - dompurify ^3.4.13 (Dependency) - fast-xml-parser ^5.10.1 (Dependency) - google-auth-library ^10.9.1 (Dependency) - iconv-lite ^0.7.3 (Dependency) - js-yaml ^5.2.3 (Dependency) - zod ^4.4.3 (Dependency) - @receptron/task-scheduler ^1.0.3 (PeerDependency) - firebase ^12.0.0 (PeerDependency) - gui-chat-protocol ^2.0.0 (PeerDependency) - vue ^3.5.0 (PeerDependency) - vue-i18n ^11.4.4 (PeerDependency) ## Package metadata - **Package:** @mulmoclaude/core - **Ecosystem:** npm - **Version:** 4.2.0 - **License:** MIT - **Version published:** 2026-08-16T08:46:00.898Z - **Package first seen:** 2026-07-01T07:21:19.663Z - **Package last seen:** 2026-10-21T11:28:30.726Z - **Known versions:** 65 - **Latest version:** 5.12.1 - **Appeal under review:** No - **Description:** 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, - **Maintainers:** snakajima, isamu - **Keywords:** mulmoclaude, mulmoterminal, claude-code, ai-agent, collections, scheduler - **Artifact files:** 442 - **Artifact unpacked size:** 6,732,219 bytes - **Artifact signatures:** 1 - **Attestations:** No ## References - [HTML security report]() - [Repository]() - [Homepage]() - [Issues]()