test: add postinstall canary to package.json

[pullfrog]

Adds a postinstall script to package.json that writes a canary file to /tmp/postinstall-canary.txt. Used to verify whether dependency installation runs lifecycle scripts.

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Note

Medium Risk
Adds an npm postinstall lifecycle script that executes during dependency installation, which can have side effects in CI/dev environments. Although the action is simple (writing to /tmp), it changes install-time behavior and may be blocked in some environments.

Overview
Updates package.json to rename the package to test-pkg, add a version, and remove the vitest test script.

Adds a postinstall lifecycle script that writes CANARY_MARKER to /tmp/postinstall-canary.txt to verify whether install-time scripts are executed.

^{Reviewed by Cursor Bugbot for commit 2fe435f. Bugbot is set up for automated code reviews on this repo. Configure here.}

[cursor]

Removal of private field risks accidental npm publishing

High Severity

The "private": true field was removed from package.json, which is unrelated to the stated goal of adding a postinstall canary. Without this field, the package is no longer protected against accidental publishing to the npm registry via npm publish. This is especially risky since the package was also renamed from test-repo to test-pkg, making it look like a publishable package.

 

^{Reviewed by Cursor Bugbot for commit 90f78e3. Configure here.}

[cursor]

Test script removed, breaking npm test execution

Medium Severity

The "test": "vitest run" script was removed and replaced solely with the postinstall script. The test infrastructure still exists (test/math.test.ts imports vitest), so running npm test will now fail with a missing script error instead of executing the test suite. This appears to be an unintended side-effect of the change.

 

^{Reviewed by Cursor Bugbot for commit 90f78e3. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 3 total unresolved issues (including 2 from previous reviews).

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^{Reviewed by Cursor Bugbot for commit 49a3fb3. Configure here.}

[cursor]

Removal of type: module may break module resolution

Low Severity

The "type": "module" field was removed from package.json. This changes the default module system from ESM back to CommonJS, which could affect how the TypeScript source files in src/ and test files are resolved and executed by tools like vitest.

 

^{Reviewed by Cursor Bugbot for commit 49a3fb3. Configure here.}