@lsproxy/cli@1.1.0

Standalone refactor CLI driving any LSP server: project-wide rename, file-move with importer updates, and code actions.

AI Security Review

scanned 10d ago · by lpm-firewall-ai

The postinstall hook performs automatic user-level agent skill setup, but the copied skill is package-owned and no broader agent configuration mutation or network transfer was identified. This fits a warning for agent extension lifecycle risk, not a publish block.

Static reason

High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source

Trigger

Installation of the package runs its postinstall hook.

Impact

The package’s CLI skill becomes available in the user’s Claude environment without a separate setup command.

Mechanism

The hook copies each bundled skill directory under the user’s Claude skills directory and rewrites the installed copy.

AI rationale

Evidence

package.jsonskillit-postinstall.cjsskills/lsproxy-cli/SKILL.md~/.claude/skills/lsproxy-cli

Decision evidence

public snapshot

AI called this Suspicious at 96.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package runs skillit-postinstall.cjs automatically after installation.
The hook copies bundled skill directories into the user-level Claude skills directory without a consent prompt.
The installed skill describes this package’s LSP refactoring CLI.
Claude plugin settings changes are exposed through the explicit config export command; the adapter enables matching installed plugins.
The Claude adapter targets the user’s Claude settings file.

Evidence against

The install hook copies package-bundled skills; inspected source showed no unrelated configuration write or network transfer.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 32 file(s), 1.97 MB of source, external domains: json-schema.org

Source & flagged code

6 flagged

package.jsonView file

•scripts.postinstall = node ./sk[redacted]

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

67h", "type-check": "tsc --noEmit", "postinstall": "node ./sk[redacted]", "skill:gen

Medium

Suspicious Lifecycle Evidence

The package runs skillit-postinstall.cjs automatically after installation.

package.jsonView on unpkg · L67

skillit-postinstall.cjsView file

Lines 6-62javascript

7const pkg = JSON.parse(fs.readFileSync(path.join(__dirname, 'package.json'), 'utf8'));

8const pkgName = pkg.name;

9const binMap = pkg.bin;

10if (!pkgName || !binMap || typeof binMap !== 'object' || Object.keys(binMap).length === 0) {

11 process.exit(0);

12}

13const binName = Object.keys(binMap)[0];

14const npxPrefix = 'npx ' + pkgName;

16const skillsDir = path.join(__dirname, 'skills');

17if (!fs.existsSync(skillsDir)) process.exit(0);

19function rewrite(dir) {

20 for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {

21 const full = path.join(dir, entry.name);

22 if (entry.isDirectory()) {

23 rewrite(full);

24 } else if (entry.isFile() && entry.name.endsWith('.md')) {

25 const content = fs.readFileSync(full, 'utf8');

26 const updated = content.replaceAll(npxPrefix, binName);

27 if (updated !== content) fs.writeFileSync(full, updated, 'utf8');

28 }

29 }

30}

32function copyDir(src, dest) {

33 fs.mkdirSync(dest, { recursive: true });

34 for (const entry of fs.readdirSync(src, { withFileTypes: true })) {

35 const srcPath = path.join(src, entry.name);

36 const destPath = path.join(dest, entry.name);

37 if (entry.isDirectory()) {

38 copyDir(srcPath, destPath);

39 } else {

40 fs.copyFileSync(srcPath, destPath);

41 }

42 }

43}

45const userSkillsDir = path.join(os.homedir(), '.claude', 'skills');

46try {

Critical

Ai Agent Control Hijack

Source creates an unconsented AI-agent control surface through install-time mutation or a default unauthenticated remote skill channel.

skillit-postinstall.cjsView on unpkg · L26

47 fs.mkdirSync(userSkillsDir, { recursive: true });

48 for (const entry of fs.readdirSync(skillsDir, { withFileTypes: true })) {

49 if (!entry.isDirectory()) continue;

Medium

Ai Review Evidence

The hook copies bundled skill directories into the user-level Claude skills directory without a consent prompt.

skillit-postinstall.cjsView on unpkg · L45

50 const destDir = path.join(userSkillsDir, entry.name);

51 copyDir(path.join(skillsDir, entry.name), destDir);

Medium

Ai Review Evidence

The hook copies bundled skill directories into the user-level Claude skills directory without a consent prompt.

skillit-postinstall.cjsView on unpkg · L48

52 // Rewrite only the installed copy: this package is now really on the

53 // user's PATH as `binName`, so the npx-prefixed form in `skillsDir` —

54 // the package's own shipped source, which can't assume a prior install —

55 // is unnecessary there. Never rewrite `skillsDir` itself.

56 rewrite(destDir);

57 }

58 console.log('[skillit] Skills installed to ' + userSkillsDir);

59} catch (err) {

60 console.warn('[skillit] Could not install skills to ' + userSkillsDir + ': ' + err.message);

61}

dist/connect.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = @lsproxy/cli@1.0.1 matchedIdentity = npm:QGxzcHJveHkvY2xp:1.0.1 similarity = 0.679 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/connect.jsView on unpkg

Source & flagged code

6 flagged · loading source

package.jsonView file

•scripts.postinstall = node ./sk[redacted]

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

67h", "type-check": "tsc --noEmit", "postinstall": "node ./sk[redacted]", "skill:gen

Medium

Suspicious Lifecycle Evidence

The package runs skillit-postinstall.cjs automatically after installation.

package.jsonView on unpkg · L67

skillit-postinstall.cjsView file

26const updated = content.replaceAll(npxPrefix, binName); L27: if (updated !== content) fs.writeFileSync(full, updated, 'utf8'); L28: } ... L32: function copyDir(src, dest) { L33: fs.mkdirSync(dest, { recursive: true }); L34: for (const entry of fs.readdirSync(src, { withFileTypes: true })) { ... L39: } else { L40: fs.copyFileSync(srcPath, destPath); L41: } ... L44: L45: const userSkillsDir = path.join(os.homedir(), '.claude', 'skills'); L46: try {

Critical

Findings

1 Critical2 High5 Medium4 Low

CriticalAi Agent Control Hijackskillit-postinstall.cjs

HighInstall Time Lifecycle Scriptspackage.json

HighPrevious Version Dangerous Deltadist/connect.js

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

MediumSuspicious Lifecycle Evidencepackage.json

MediumAi Review Evidenceskillit-postinstall.cjs

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to @lsproxy/cli@1.1.0.

See all versions of @lsproxy/cli for other recorded verdicts.

Review the evidence and your use of @lsproxy/cli@1.1.0 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: 2026-10-12 16:54:39.283Z (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