registry / AI-agent control-surface risk / @firestitch/standards
@firestitch/standards
Firestitch engineering standards - routing indexes and rule documents
This report shows the evidence for @firestitch/standards@1.0.2. 2 of 2 known versions are blocked or flagged. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe lifecycle hook performs concrete, persistent AI-agent instruction-file mutation outside the package directory. Absence of exfiltration does not remove this install-time control-surface risk.
Static reason
One or more suspicious static signals were detected.
Trigger
npm install
Impact
Unconsented control of subsequent AI-agent behavior in the repository.
Mechanism
postinstall writes AI-agent instructions into consumer repo
Policy narrative
On npm install, bin/postinstall.js walks upward to the nearest .git directory, then writes a generated CLAUDE.md at that repository root, creates CLAUDE.local.md, and alters .gitignore. The generated file directs AI agents to load this package's standards before code changes. This is an unconsented postinstall mutation of a consuming project's AI-agent control surface.
AI rationale
The lifecycle hook performs concrete, persistent AI-agent instruction-file mutation outside the package directory. Absence of exfiltration does not remove this install-time control-surface risk.
Evidence
package.jsonbin/postinstall.js<consumer-repo>/CLAUDE.md<consumer-repo>/CLAUDE.local.md<consumer-repo>/.gitignore
Decision evidence
public snapshotAI identified this as a dangerous AI-agent capability at 97.0% confidence with low false-positive risk.
Evidence for policy risk
- package.json runs postinstall on npm install.
- bin/postinstall.js finds consuming repo root via .git.
- bin/postinstall.js overwrites consuming repo CLAUDE.md.
- Hook creates CLAUDE.local.md and modifies .gitignore.
- Generated CLAUDE.md imposes instructions on AI-agent work.
Evidence against
- No network, credential harvesting, shell execution, or remote payload loading found.
- Only executable package file is bin/postinstall.js; remaining files are standards documents.
Behavioral surface
Filesystem
HighEntropyStrings
Source & flagged code
2 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node bin/postinstall.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node bin/postinstall.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgFindings
1 High1 Medium3 Low
HighInstall Time Lifecycle Scriptspackage.json
MediumAmbiguous Install Lifecycle Scriptpackage.json
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to @firestitch/standards@1.0.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing @firestitch/standards@1.0.2. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
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