registry / @h-rig/harness-plugin / 0.0.6-alpha.187

@h-rig/harness-plugin@0.0.6-alpha.187

First-party agent-harness provider capability plugin for Rig.

AI Security Review

scanned 2d ago · by lpm-firewall-ai

No confirmed malicious attack surface was established. The package is a first-party Rig harness plugin with user-invoked agent runtime, shell, file, and native-tool capabilities that are scoped by Rig runtime paths.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

User invokes Rig harness agent/runtime commands or configures the runtime tool router.

Impact

Provides controlled shell/file/git/runtime support for Rig tasks; no unconsented install/import execution or exfiltration found.

Mechanism

package-aligned agent harness and runtime tooling

Rationale

Static inspection found powerful agent-runtime primitives, native binaries, environment handling, and network calls, but they are exposed as explicit Rig harness functionality and bounded by runtime/workspace configuration. No lifecycle hook, import-time payload, credential exfiltration, persistence backdoor, or unconsented AI-agent control-surface mutation was confirmed.

Evidence

package.jsondist/src/plugin.jsdist/src/agent-harness/rig-agent.jsdist/src/tooling/claude-router.jsdist/src/tooling/gateway.jsdist/bin/rig-agent-dispatch.jsnative/linux-arm64/rig-shellruntimeHome/.ssh/known_hostsRIG task workspace files via runtime file toolsRig harness state files under resolveHarnessPaths(projectRoot).stateDir

Network endpoints1

registry.npmjs.org/-/v1/search

Decision evidence

public snapshot

AI called this Clean at 82.0% confidence as Benign with medium false-positive risk.

Evidence for block

Ships native runtime binaries under native/*/rig-shell and native/*/rig-tools.
dist/src/tooling/claude-router.js exposes shell/file MCP tools for agent runtimes.
dist/src/agent-harness/rig-agent.js hydrates runtime env and reads configured .env secrets for the task runtime.

Evidence against

package.json has no lifecycle scripts, so no install-time execution was found.
Default export is dist/src/plugin.js; risky shell/file behavior is invoked by rig-agent/runtime router commands, not import side effects.
Shell workdir is constrained inside RIG_TASK_WORKSPACE in dist/src/tooling/claude-router.js.
Known-hosts writes are limited to runtimeHome/.ssh/known_hosts with GitHub host keys for git operations.
Network use seen is package-aligned: npm registry search and configured Rig server steering URL.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

Manifest

NoLicense

scanned 34 file(s), 634 KB of source, external domains: registry.npmjs.org

Source & flagged code

3 flagged

dist/src/agent-harness/rig-agent.jsView file

Lines 1-35javascript

1#!/usr/bin/env bun

2// @bun

4// packages/harness-plugin/src/agent-harness/rig-agent.ts

5import { existsSync as existsSync3, mkdirSync as mkdirSync2, readFileSync as readFileSync2, writeFileSync as writeFileSync2 } from "fs";

6import { dirname, resolve as resolve3 } from "path";

7import { readBuildConfig } from "@rig/core/build-time-config";

9// packages/harness-plugin/src/agent-harness/controlled-bash.ts

10import { existsSync } from "fs";

11import { resolve } from "path";

12import { resolveRigLayout } from "@rig/core/layout";

13function controlledBashCandidates(projectRoot) {

14 const layout = resolveRigLayout(projectRoot);

15 const candidates = [

16 process.env.RIG_CONTROLLED_BASH_BIN?.trim() || "",

17 resolve(layout.binDir, "controlled-bash"),

18 Bun.which("controlled-bash") || ""

19 ];

20 return candidates.filter((candidate) => Boolean(candidate));

21}

22function resolveControlledBash(projectRoot) {

23 for (const candidate of controlledBashCandidates(projectRoot)) {

24 if (existsSync(candidate))

25 return candidate;

26 }

27 return null;

28}

29async function runControlledBash(args, options) {

30 const projectRoot = process.env.RIG_HOST_PROJECT_ROOT?.trim() || process.env.PROJECT_RIG_ROOT?.trim() || process.env.RIG_TASK_WORKSPACE?.trim() || process.cwd() || options.projectRootFallbackDir;

31 const controlled = resolveControlledBash(projectRoot);

Critical

Persistence Backdoor

Source writes persistence or remote-access backdoor material.

dist/src/agent-harness/rig-agent.jsView on unpkg · L15

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

dist/src/agent-harness/rig-agent.jsView on unpkg · L15

32 if (!controlled) {

33 console.error("[rig-agent] controlled-bash entrypoint unavailable; refusing to run an unguarded shell.");

34 return 126;

35 }

native/linux-arm64/rig-shellView file

•path = native/linux-arm64/rig-shell kind = native_binary sizeBytes = 3029392 magicHex = [redacted]

Medium

Ships Native Binary

Package ships native binary artifacts.

native/linux-arm64/rig-shellView on unpkg

Source & flagged code

3 flagged · loading source

dist/src/agent-harness/rig-agent.jsView file

15const candidates = [ L16: process.env.RIG_CONTROLLED_BASH_BIN?.trim() || "", L17: resolve(layout.binDir, "controlled-bash"), ... L29: async function runControlledBash(args, options) { L30: const projectRoot = process.env.RIG_HOST_PROJECT_ROOT?.trim() || process.env.PROJECT_RIG_ROOT?.trim() || process.env.RIG_TASK_WORKSPACE?.trim() || process.cwd() || options.projectR... L31: const controlled = resolveControlledBash(projectRoot); ... L38: stdin: "inherit", L39: stdout: "inherit", L40: stderr: "inherit", ... L169: try { L170: const parsed = JSON.parse(readFileSync(path, "utf-8")); L171: return parsed && typeof parsed === "object" && !Array.isArray(parsed) ? parsed : null;

Critical

Persistence Backdoor

Source writes persistence or remote-access backdoor material.

dist/src/agent-harness/rig-agent.jsView on unpkg · L15

15Trigger-reachable chain: manifest.exports -> dist/src/agent-harness/rig-agent.js L15: const candidates = [ L16: process.env.RIG_CONTROLLED_BASH_BIN?.trim() || "", L17: resolve(layout.binDir, "controlled-bash"), ... L29: async function runControlledBash(args, options) { L30: const projectRoot = process.env.RIG_HOST_PROJECT_ROOT?.trim() || process.env.PROJECT_RIG_ROOT?.trim() || process.env.RIG_TASK_WORKSPACE?.trim() || process.cwd() || options.projectR... L31: const controlled = resolveControlledBash(projectRoot); ... L38: stdin: "inherit", L39: stdout: "inherit", L40: stderr: "inherit", ... L169: try { L170: const parsed = JSON.parse(readFileSync(path, "utf-8")); L171: return parsed && typeof parsed === "object" && !Array.isArray(parsed) ? parsed : null;

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

dist/src/agent-harness/rig-agent.jsView on unpkg · L15

native/linux-arm64/rig-shellView file

•path = native/linux-arm64/rig-shell kind = native_binary sizeBytes = 3029392 magicHex = [redacted]

Medium

Ships Native Binary

Package ships native binary artifacts.

native/linux-arm64/rig-shellView on unpkg

Findings

2 Critical4 Medium4 Low

CriticalPersistence Backdoordist/src/agent-harness/rig-agent.js

CriticalTrigger Reachable Dangerous Capabilitydist/src/agent-harness/rig-agent.js

MediumNetwork

MediumEnvironment Vars

MediumShips Native Binarynative/linux-arm64/rig-shell

MediumStructural Risk Force Deep Review

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

LowNo License

Source & flagged code

3 flagged

dist/src/agent-harness/rig-agent.jsView file

Lines 1-35javascript

1#!/usr/bin/env bun

2// @bun

4// packages/harness-plugin/src/agent-harness/rig-agent.ts

5import { existsSync as existsSync3, mkdirSync as mkdirSync2, readFileSync as readFileSync2, writeFileSync as writeFileSync2 } from "fs";

6import { dirname, resolve as resolve3 } from "path";

7import { readBuildConfig } from "@rig/core/build-time-config";

9// packages/harness-plugin/src/agent-harness/controlled-bash.ts

10import { existsSync } from "fs";

11import { resolve } from "path";

12import { resolveRigLayout } from "@rig/core/layout";

13function controlledBashCandidates(projectRoot) {

14 const layout = resolveRigLayout(projectRoot);

15 const candidates = [

16 process.env.RIG_CONTROLLED_BASH_BIN?.trim() || "",

17 resolve(layout.binDir, "controlled-bash"),

18 Bun.which("controlled-bash") || ""

19 ];

20 return candidates.filter((candidate) => Boolean(candidate));

21}

22function resolveControlledBash(projectRoot) {

23 for (const candidate of controlledBashCandidates(projectRoot)) {

24 if (existsSync(candidate))

25 return candidate;

26 }

27 return null;

28}

29async function runControlledBash(args, options) {

30 const projectRoot = process.env.RIG_HOST_PROJECT_ROOT?.trim() || process.env.PROJECT_RIG_ROOT?.trim() || process.env.RIG_TASK_WORKSPACE?.trim() || process.cwd() || options.projectRootFallbackDir;

31 const controlled = resolveControlledBash(projectRoot);

Critical

Persistence Backdoor

Source writes persistence or remote-access backdoor material.

dist/src/agent-harness/rig-agent.jsView on unpkg · L15

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

dist/src/agent-harness/rig-agent.jsView on unpkg · L15

32 if (!controlled) {

33 console.error("[rig-agent] controlled-bash entrypoint unavailable; refusing to run an unguarded shell.");

34 return 126;

35 }

native/linux-arm64/rig-shellView file

•path = native/linux-arm64/rig-shell kind = native_binary sizeBytes = 3029392 magicHex = [redacted]

Medium

Ships Native Binary

Package ships native binary artifacts.

native/linux-arm64/rig-shellView on unpkg