registry / @plannotator/opencode / 0.28.36
@plannotator/opencode@0.28.36
Plannotator plugin for OpenCode - interactive plan review with visual annotation
AI Security Review
scanned 7d ago · by lpm-firewall-aiThe postinstall hook automatically installs package-owned OpenCode commands and a skill, which is an agent extension lifecycle risk. The inspected credential flow is scoped to a token read from the local inbox registry and sent to its loopback service, so the scanner’s exfiltration label is unsupported.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
Installing the package with lifecycle scripts enabled, or setting its postinstall override to force the copy.
Impact
The hook changes the user’s OpenCode configuration; the reviewed source does not establish credential theft or another concrete attack.
Mechanism
The hook copies command files and the package skill into the OpenCode configuration directory. Runtime inbox requests use a registry token with a loopback service.
AI rationale
The postinstall hook automatically installs package-owned OpenCode commands and a skill, which is an agent extension lifecycle risk. The inspected credential flow is scoped to a token read from the local inbox registry and sent to its loopback service, so the scanner’s exfiltration label is unsupported.
Evidence
package.jsonscripts/postinstall.cjsdist/server.js
Network endpoints1
127.0.0.1
Decision evidence
public snapshotAI called this Suspicious at 84.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The manifest runs a postinstall script that copies package commands and a skill into OpenCode’s user configuration.
- The script performs that copy for packages installed under node_modules; a package environment variable can also force or disable it.
- The runtime bridge reads a local inbox registry and sends its token in a bearer header to that registry’s loopback port.
- The reviewed behavior establishes package-owned OpenCode setup and local service authentication, but no concrete attack or unrelated credential recipient.
Evidence against
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShell
HighEntropyStringsMinifiedTelemetryUrlStrings
Source & flagged code
6 flaggedpackage.jsonView file
•scripts.postinstall = node scripts/postinstall.cjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.cjs
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgdiagram-engine/engine.jsView file
1function mc(e,t){for(var n=0;n<t.length;n++){const r=t[n];if(typeof r!="string"&&!Array.isArray(r)){for(const o in r)if(o!=="default"&&!(o in e)){const s=Object.getOwnPropertyDescr...
L2: `);let n=t.length;for(;n>0&&(t[n-1]??"").trim()==="";)n-=1;let r=1;for(;r<=n&&(t[r-1]??"").trim()==="";)r+=1;return n===0||r>n?null:[r,n]}function _c(e){for(const t of e.split(`
Medium
Findings
1 Critical2 High6 Medium7 Low
CriticalHardcoded Runtime Data Exfiltrationdist/index.js
HighInstall Time Lifecycle Scriptspackage.json
HighPrevious Version Dangerous Deltadist/server.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumDynamic Requirediagram-engine/engine.js
MediumNetwork
MediumEnvironment Vars
MediumOversized Source Filediagram-engine/mermaid.js
MediumStructural Risk Force Deep Review
LowNon Install Lifecycle Scripts
LowScripts Present
LowEval
LowFilesystem
LowHigh Entropy Strings
Low
Affected versions and remediation
This report applies to @plannotator/opencode@0.28.36.
See all versions of @plannotator/opencode for other recorded verdicts.
- Review the evidence and your use of @plannotator/opencode@0.28.36 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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