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@softize/opus@12.5.5: AI-agent control-surface risk | LPM Firewall

registry / @softize/opus / 12.5.5

@softize/opus@12.5.5

End-to-end action protocol for TypeScript. Single package with subpath exports (core + adapters).

AI Security Review

scanned 4h ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. On npm installation, the package mutates the consumer repository’s Claude and generic agent control surfaces, then registers a Claude Stop hook that runs package-provided code. This is an unconsented install-time broad AI-agent control-surface modification.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review

Trigger

npm postinstall for a project declaring @softize/opus

Impact

Can alter agent instructions and execute the installed hook at Claude Stop events within the consumer repository.

Mechanism

automatic materialization of agent skills, instructions, hooks, and Git hooks

Policy narrative

Installing the dependency runs postinstall without an explicit user command. The postinstall initializes the consumer project, materializes package-controlled skills to .agents and .claude, updates AGENTS.md and CLAUDE.md, installs Git hooks, and configures Claude’s Stop hook to execute a package-provided script. This is install-time modification of foreign AI-agent control surfaces.

Rationale

The lifecycle chain concretely performs broad agent-control and hook persistence in the consuming project. Although no exfiltration was found, this meets the blocking policy for unconsented npm postinstall mutation of foreign/broad AI-agent control surfaces.

Evidence

package.jsonbin/lib/postinstall.mjsbin/lib/init.mjsbin/lib/materialize.mjsregistry/hooks/opus-check-on-stop.mjsopus.jsonbase.json.agents/skills/*

Source & flagged code

8 flagged · loading source

package.jsonView file

•scripts.postinstall = node ./bin/lib/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node ./bin/lib/postinstall.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

src/ui/docs/markdown.tsxView file

59) L60: const fn = new Function(...entries.map(([k]) => k), js) L61: const args = entries.map(([, v]) => v)

Low

Eval

Package source references a known benign dynamic code generation pattern.

src/ui/docs/markdown.tsxView on unpkg · L59

bin/lib/db-migrate-runner.mjsView file

47const configPath = resolveDbConfigPath(projectRoot, requestedConfigPath).path L48: const mod = await import(pathToFileURL(path.resolve(configPath)).href) L49: const config = mod.default ?? mod

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/lib/db-migrate-runner.mjsView on unpkg · L47

bin/cli.mjsView file

•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; limitedFiles = 8

High

Semantic Analysis Limited

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

bin/cli.mjsView on unpkg

bin/lib/db.mjsView file

•matchType = normalized_sha256 matchedPackage = @softize/opus@12.4.0 matchedPath = bin/lib/db.mjs matchedIdentity = npm:QHNvZnRpemUvb3B1cw:12.4.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/lib/db.mjsView on unpkg

bin/lib/gen.mjsView file

•matchType = normalized_sha256 matchedPackage = @softize/opus@12.4.0 matchedPath = bin/lib/gen.mjs matchedIdentity = npm:QHNvZnRpemUvb3B1cw:12.4.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/lib/gen.mjsView on unpkg

bin/lib/init.mjsView file

•matchType = normalized_sha256 matchedPackage = @softize/opus@12.4.0 matchedPath = bin/lib/init.mjs matchedIdentity = npm:QHNvZnRpemUvb3B1cw:12.4.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/lib/init.mjsView on unpkg

Source & flagged code

8 flagged

package.jsonView file

Lines 339-369json

339 "jsonwebtoken": "^9.0.2",

340 "kysely": "^0.27.0",

341 "node-cron": "^3.0.3",

342 "pg": "^8.13.0",

343 "pino": "^9.5.0",

344 "react": "^19.0.0",

345 "react-dom": "^19.0.0",

346 "react-hook-form": "^7.54.0",

347 "tsx": "^4.19.0",

348 "vite": "^6.0.0",

349 "vitest": "^2.1.0",

350 "zod": "^3.24.0"

351 },

352 "repository": {

353 "type": "git",

354 "url": "git+https://github.com/softize-dev/opus.git",

355 "directory": "packages/opus"

356 },

357 "homepage": "https://opus.softize.com.br",

358 "scripts": {

359 "postinstall": "node ./bin/lib/postinstall.mjs",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L359

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L359

360 "copy:check": "node ./bin/cli.mjs copy --check",

361 "typecheck": "tsc --noEmit",

362 "test": "vitest run",

363 "test:watch": "vitest",

364 "test:cov": "vitest run --coverage",

365 "registry:up": "npx -y verdaccio --config ~/.config/verdaccio/config.yaml",

366 "release": "bash ./scripts/release.sh",

367 "release:local": "bash ./scripts/release.sh --local"

368 }

369}

src/ui/docs/markdown.tsxView file

Lines 39-79tsx

39 scope,

40 previewClassName,

41}: {

42 code: string

43 scope: Record<string, unknown>

44 previewClassName?: string

45}): React.ReactElement {

46 const result = React.useMemo

bin/lib/db-migrate-runner.mjsView file

Lines 27-67javascript

27 process.stdout.write(`\n${JSON.stringify(obj)}\n`)

28}

29

30function collectEntities(domain, out

bin/cli.mjsView file

•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; limitedFiles = 8

High

Semantic Analysis Limited

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

bin/cli.mjsView on unpkg

bin/lib/db.mjsView file

•matchType = normalized_sha256 matchedPackage = @softize/opus@12.4.0 matchedPath = bin/lib/db.mjs matchedIdentity = npm:QHNvZnRpemUvb3B1cw:12.4.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/lib/db.mjsView on unpkg

bin/lib/gen.mjsView file

•matchType = normalized_sha256 matchedPackage = @softize/opus@12.4.0 matchedPath = bin/lib/gen.mjs matchedIdentity = npm:QHNvZnRpemUvb3B1cw:12.4.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/lib/gen.mjsView on unpkg

bin/lib/init.mjsView file

•matchType = normalized_sha256 matchedPackage = @softize/opus@12.4.0 matchedPath = bin/lib/init.mjs matchedIdentity = npm:QHNvZnRpemUvb3B1cw:12.4.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/lib/init.mjsView on unpkg