registry / oh-my-opencode / 5.1.2
oh-my-opencode@5.1.2
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 1mo ago · by lpm-firewall-aiThe inspected code supports a bounded first-party agent-extension lifecycle risk, not malware behavior. No concrete credential theft, destructive broad mutation, remote payload execution, or nested self-lifecycle dependency was found.
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
npm postinstall triggers cache invalidation; an activated LSP bootstrap triggers its dependency setup.
Impact
This can alter package-owned OpenCode cache state and install local LSP runtime dependencies, creating an agent-extension lifecycle risk rather than confirmed compromise.
Mechanism
The install hook removes matching package cache directories, while the LSP bootstrap constructs and runs local npm installation commands when required files are absent.
AI rationale
The inspected code supports a bounded first-party agent-extension lifecycle risk, not malware behavior. No concrete credential theft, destructive broad mutation, remote payload execution, or nested self-lifecycle dependency was found.
Evidence
package.jsonpostinstall.mjsdist/cli-node/index.jsbin/oh-my-opencode.js$XDG_CACHE_HOME/opencode~/.cache/opencodepackages/lsp-tools-mcppackages/lsp-daemon
Decision evidence
public snapshotAI called this Suspicious at 84.0% confidence as Dangerous Capability with low false-positive risk.
Evidence for warning
- The manifest runs a postinstall script automatically.
- The postinstall script deletes matching OpenCode cache directories.
- The bundled LSP bootstrap can invoke npm install when its runtime is missing.
- The legacy installer path is limited to explicit update or uninstall commands.
Evidence against
- No credential collection, exfiltration, remote payload execution, or self-dependency chain was identified in the inspected paths.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShell
HighEntropyStringsMinifiedTelemetryUrlStrings
GitDependency
Source & flagged code
24 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 Critical14 High9 Medium6 Low
CriticalSame File Env Network Executiondist/skills/browser/runtime/omowright/index.js
CriticalDownload Executedist/skills/browser/runtime/omowright/index.js
CriticalRemote Response Code Executiondist/index.js
CriticalAi Agent Control Hijackpackage.json
CriticalPrevious Version Dangerous Deltadist/cli-node/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 Exfiltrationdist/cli-node/index.js
Affected versions and remediation
This report applies to oh-my-opencode@5.1.2.
See all versions of oh-my-opencode for other recorded verdicts.
- Review the evidence and your use of oh-my-opencode@5.1.2 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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