registry / @polymorphism-tech/morph-spec / 9.6.0

@polymorphism-tech/morph-spec@9.6.0

MORPH-SPEC: NLH (Natural Language Harness) for spec-driven development with Claude Code

AI Security Review

scanned 3d ago · by lpm-firewall-ai

The automatic postinstall hook performs global Claude Code configuration and, on Windows, edits PowerShell profiles. This is first-party setup behavior, but its lifecycle activation warrants a warning.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

Installing the package with lifecycle scripts enabled.

Impact

The package configures a global agent interface and modifies user profile files without a separate setup command.

Mechanism

The hook copies package statusline scripts into ~/.claude and merges a statusLine command into its settings; on Windows it also edits PowerShell profiles.

AI rationale

Evidence

package.jsonsrc/scripts/global-install.jssrc/utils/hooks-installer.js

Decision evidence

public snapshot

AI called this Suspicious at 92.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package runs global-install.js automatically during postinstall.
The install hook copies statusline scripts and merges a command into the global Claude settings file.
On Windows, the hook also appends the npm global directory to PowerShell profiles.

Evidence against

The installed statusline command points to scripts copied from this package into the user's local Claude directory.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

Manifest

NoLicense

scanned 280 file(s), 1.71 MB of source, external domains: cli.github.com, cloud.google.com, json.schemastore.org, raw.githubusercontent.com, registry.npmjs.org, stitch.googleapis.com, www.python.org

Source & flagged code

20 flagged

package.jsonView file

•scripts.postinstall = node src/scripts/global-install.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

bin/morph-spec.jsView file

10// Lazy: eager import of every command cost ~700 ms per invocation, paid by each hook that shells out. L11: const lazy = (path, name) => async (...args) => (await import(path))[name](...args); L12:

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/morph-spec.jsView on unpkg · L10

framework/hooks/claude-code/core/validate-completion.jsView file

41try { L42: if (process.env.MORPH_STOP_HOOK_ACTIVE === '1') return null; L43: ... L49: const { name, feature } = active; L50: const cwd = process.cwd(); L51: const warnings = []; ... L60: try { L61: if (existsSync(watchPath)) phaseWatch = JSON.parse(readFileSync(watchPath, 'utf-8')); L62: } catch { /* corrupt file — start fresh */ }

Low

Weak Crypto

Package source references weak cryptographic algorithms.

framework/hooks/claude-code/core/validate-completion.jsView on unpkg · L41

src/utils/hooks-installer.jsView file

Lines 1-24javascript

1import { join, dirname } from 'path';

2import { readFile } from 'fs/promises';

3import { existsSync, chmodSync, readdirSync } from 'fs';

4import { homedir } from 'os'

src/scripts/global-install.jsView file

43} else { L44: await mkdir(dirname(profilePath), { recursive: true }); L45: } ... L67: label: 'statusline', L68: path: '~/.claude/', L69: error: statuslineResult.reason?.message,

Critical

Ai Agent Control Hijack

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

src/scripts/global-install.jsView on unpkg · L43

•Runtime or CLI code links a write operation to an explicit external AI-agent control path: , 'documents', 'powershell', 'microsoft.powershell_profile.ps1'); const psprofilelegacy = join(homedir(), 'documents', 'windowspowershell', 'microsoft.powershell_profile.ps1'); const marker = '# morph-spec: ensure npm global in path'; const snippet = [ marker, `if ($env:path -notlike "*${npm[redacted](/\\/g, '\\\\')}*") {`, ` $env:path += ";${npmglobaldir}"`, '}', '# end morph-spec path', ].join('\n'); for (const profilepath of [psprofile, psprofilelegacy]) { try { let content = ''; if (existssync(profilepath)) { content = await readfile(profilepath, 'utf8'); if (content.includes(marker)) continue; } else { await mkdir(dir

High

External Ai Agent Control Surface Mutation

Runtime or CLI source writes behavior-bearing configuration into a user or project AI-agent control surface.

src/scripts/global-install.jsView on unpkg

framework/hooks/claude-code/statusline.pyView file

•path = framework/hooks/claude-code/statusline.py kind = build_helper sizeBytes = 27345 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

framework/hooks/claude-code/statusline.pyView on unpkg

framework/hooks/claude-code/core/worktree-context.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 10

High

Semantic Analysis Limited

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

framework/hooks/claude-code/core/worktree-context.js#virtual:normalized:round1View on unpkg

src/lib/installers/mcp-installer.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@9.0.0 matchedPath = src/lib/installers/mcp-installer.js matchedIdentity = npm:[redacted]:9.0.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High