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@tera-system/core@0.6.0: AI-agent control-surface risk | LPM Firewall

registry / @tera-system/core / 0.6.0

@tera-system/core@0.6.0

Tera System OpenCode Plugin — governance core, 25 agents, 38 commands, distribution tools (personal edition)

AI Security Review

scanned 11d ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. An automatic install hook mutates the consumer project's OpenCode control surface. It installs agent and command content and can create an enabled MCP configuration that invokes external packages through npx.

Static reason

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

Trigger

Installing the package through npm.

Impact

A package install can establish AI-agent configuration and future command execution in a consumer project without an explicit setup command.

Mechanism

The postinstall hook runs the installer, which writes under the target workspace .opencode directory and adds enabled MCP commands.

Policy narrative

On npm installation, the postinstall hook runs an installer against the consumer workspace. The installer populates the consumer's .opencode agents and commands and creates an OpenCode MCP configuration if none exists. That configuration enables commands using npx, causing external packages to be resolved when the agent control surface is used. This is an unconsented install-time mutation of a broad AI-agent control surface.

AI rationale

The automatic postinstall writes enabled OpenCode configuration and agent content into the consuming project. This meets the install-control-surface blocking policy despite preserving an existing configuration.

Evidence

package.jsonscripts/install.jsopencode.tera.example.json.opencode/opencode.json.opencode/agents.opencode/commands

Decision evidence

Source & flagged code

8 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/install.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/install.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

scripts/install.jsView file

10* - Never overwrites a file it does not own. L11: * - Tracks ownership via `.opencode/tera-core.manifest.json`. L12: * - Only updates files it owns, always keeping a backup first. L13: * - Idempotent: re-running is safe; identical files are skipped. L14: * - Never touches an existing user `opencode.json`. L15: * ... L65: function copyFile(src, dest) { L66: fs.mkdirSync(path.dirname(dest), { recursive: true }); L67: fs.copyFileSync(src, dest); L68: } ... L70: function loadOwnership(target) { L71: const p = path.join(target, ".opencode", MANIFEST_NAME);

Critical

Ai Agent Control Hijack

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

scripts/install.jsView on unpkg · L10

tools/tera-fetch.ps1View file

•path = tools/tera-fetch.ps1 kind = build_helper sizeBytes = 6816 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

tools/tera-fetch.ps1View on unpkg

assets/project-control/TeraPricingCalculator.xlsxView file

•path = assets/project-control/TeraPricingCalculator.xlsx kind = high_entropy_blob sizeBytes = 21531 magicHex = [redacted]

High

Ships High Entropy Blob

Package ships high-entropy non-source blobs.

assets/project-control/TeraPricingCalculator.xlsxView on unpkg

•path = assets/project-control/TeraPricingCalculator.xlsx kind = compressed_blob sizeBytes = 21531 magicHex = [redacted]

Medium

Ships Compressed Blob

Package ships compressed or archive-like blobs.

assets/project-control/TeraPricingCalculator.xlsxView on unpkg

•path = assets/project-control/TeraPricingCalculator.xlsx kind = nested_archive_needs_inspection sizeBytes = 21531 magicHex = [redacted]

Low

Nested Archive Needs Inspection

Package ships a nested archive or MCP bundle that was inventoried but not recursively analyzed.

assets/project-control/TeraPricingCalculator.xlsxView on unpkg

scripts/build.mjsView file

•matchType = normalized_sha256 matchedPackage = @tera-system/core@0.2.18 matchedPath = scripts/build.mjs matchedIdentity = npm:QHRlcmEtc3lzdGVtL2NvcmU:0.2.18 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.

scripts/build.mjsView on unpkg

Source & flagged code

8 flagged

package.jsonView file

Lines 9-43json

9 },

10 "files": [

11 "agents",

12 "commands",

13 "core",

14 "assets",

15 "tools",

16 "scripts",

17 "MANIFEST.json",

18 "opencode.tera.example.json",

19 "WELCOME.md",

20 "README.md",

21 "LICENSE.md",

22 "RELEASES.md"

23 ],

24 "bin": {

25 "tera-restore": "scripts/install.js",

26 "tera-core-restore": "scripts/install.js"

27 },

28 "scripts": {

29 "postinstall": "node scripts/install.js"

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L29

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L29

30 },

31 "keywords": [

32 "opencode",

33 "plugin",

34 "tera",

35 "governance",

36 "agents",

37 "component"

38 ],

39 "publishConfig": {

40 "access": "public"

41 }

42}

43

scripts/install.jsView file

Lines 1-30javascript

1#!/usr/bin/env node

2/**

3 * @tera/core installer

4 * --------------------------------------------------------------

5 * NON-DESTRUCTIVE + OWNERSHIP-AWARE installer for the Tera System

6 * OpenCode Plugin component.

7 *

8 * Rules:

9 * - Never deletes anything.

10 * - Never overwrites a file it does not own.

11 * - Tracks ownership via `.opencode/tera-core.manifest.json`.

tools/tera-fetch.ps1View file

•path = tools/tera-fetch.ps1 kind = build_helper sizeBytes = 6816 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

tools/tera-fetch.ps1View on unpkg

assets/project-control/TeraPricingCalculator.xlsxView file

•path = assets/project-control/TeraPricingCalculator.xlsx kind = high_entropy_blob sizeBytes = 21531 magicHex = [redacted]

High

Ships High Entropy Blob

Package ships high-entropy non-source blobs.

assets/project-control/TeraPricingCalculator.xlsxView on unpkg

•path = assets/project-control/TeraPricingCalculator.xlsx kind = compressed_blob sizeBytes = 21531 magicHex = [redacted]

Medium

Ships Compressed Blob

Package ships compressed or archive-like blobs.

assets/project-control/TeraPricingCalculator.xlsxView on unpkg

•path = assets/project-control/TeraPricingCalculator.xlsx kind = nested_archive_needs_inspection sizeBytes = 21531 magicHex = [redacted]

Low

Nested Archive Needs Inspection

Package ships a nested archive or MCP bundle that was inventoried but not recursively analyzed.

assets/project-control/TeraPricingCalculator.xlsxView on unpkg

scripts/build.mjsView file

•matchType = normalized_sha256 matchedPackage = @tera-system/core@0.2.18 matchedPath = scripts/build.mjs matchedIdentity = npm:QHRlcmEtc3lzdGVtL2NvcmU:0.2.18 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.

scripts/build.mjsView on unpkg