registry / oh-my-opencode / 5.1.42
oh-my-opencode@5.1.42
The Best AI Agent Harness - Batteries-Included OpenCode Plugin with Multi-Model Orchestration, Parallel Background Agents, and Crafted LSP/AST Tools
AI Security Review
scanned 13d ago · by lpm-firewall-aiThe source shows a browser setup capability that executes a live remote installer script, but does not establish automatic invocation or malicious behavior. The npm postinstall cache cleanup is limited to this package’s current and legacy OpenCode cache entries.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source
Trigger
A caller invokes the exported installer during browser setup.
Impact
The remote script can execute code with the invoking user's permissions and install or modify the BrowserSkill CLI.
Mechanism
The helper pipes a script from raw.githubusercontent.com into a shell or PowerShell process.
AI rationale
The source shows a browser setup capability that executes a live remote installer script, but does not establish automatic invocation or malicious behavior. The npm postinstall cache cleanup is limited to this package’s current and legacy OpenCode cache entries.
Evidence
dist/skills/browser/runtime/omowright/index.jsdist/index.jspackage.jsonpostinstall.mjs
Network endpoints1
raw.githubusercontent.com
Decision evidence
public snapshotAI called this Suspicious at 83.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The browser runtime exports an installer helper that runs a downloaded shell or PowerShell script to install the BrowserSkill CLI.
- The browser skill guidance says to use the attached browser and relay a human setup step when onboarding is needed; the remote installer is not an npm lifecycle action.
- The npm postinstall hook removes only cached directories matching this package’s current and legacy names.
Evidence against
- The manifest’s postinstall invokes a local version-check and cache-invalidation script; inspected code does not show it downloading or executing a payload.
- The Codex LSP source resolves user configuration paths and prompts for server-install decisions; the inspected excerpt does not mutate unrelated agent settings.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShell
Source & flagged code
23 flaggedpackage.jsonView file
1Install-time code directly mutates a foreign AI-agent control surface:
L62: "docs/reference/web-terminal-visual-qa.md",
L63: ".opencode/command",
L64: ".opencode/skills",
L65: ".agents/command",
L66: ".agents/skills",
L67: "packages/lsp-tools-mcp/package.json",
...
L97: "packages/prompts-core/prompts/ultrawork/codex.md",
L98: "packages/omo-codex/plugin/.codex-plugin",
L99: "!packages/omo-codex/plugin/node_modules",
...
L147: "test:fast": "bun run script/test-fast.ts",
L148: "test:senpi": "bun run build:senpi-plugin && tsgo --noEmit -p packages/omo-senpi/tsconfig.json && bun test --timeout 20000 packages/omo-senpi && bun test ./.agents/skills/senpi-qa/...
L149: "test:windows-codex": "bun run test:codex",
Write operation from dist/tui.js:
L2183: // packages/utils/src/xdg-data-dir.ts
L2184: i
Critical
Ai Agent Control Hijack
Source creates an unconsented AI-agent control surface through install-time mutation or a default unauthenticated remote skill channel.
package.jsonView on unpkg · L1•scripts.postinstall = node postinstall.mjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node postinstall.mjs
Findings
5 Critical13 High9 Medium6 Low
CriticalSame File Env Network Executiondist/skills/browser/runtime/omowright/index.js
CriticalDownload Executedist/skills/browser/runtime/omowright/index.js
CriticalEncrypted Payload Temp Executiondist/cli-node/index.js
CriticalAi Agent Control Hijackpackage.json
CriticalPrevious Version Dangerous Deltapackages/lsp-daemon/dist/index.js
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/oh-my-opencode.js
HighShelldist/cli-node/index.js
HighEvaldist/skills/ulw-research/scripts/layout-probe.test.ts
HighCredential Redirect Persistencedist/index.js
HighCommand Output Exfiltration
Affected versions and remediation
This report applies to oh-my-opencode@5.1.42.
See all versions of oh-my-opencode for other recorded verdicts.
- Review the evidence and your use of oh-my-opencode@5.1.42 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: .
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