Remove `jsdiff`

[rak-phillip]

jsdiff has no imports in the codebase and should be removed.

Proposed solution

• Remove jsdiff from dependencies

Acceptance criteria

• jsdiff removed from package.json

[github-actions]

🎯 Agentic Issue Triage

This issue tracks the removal of the jsdiff package (v1.1.1) from dependencies in package.json. Despite the title referencing diff, note that there are two separate packages in package.json:

Package	Version	Status
diff	9.0.0	✅ Used — createPatch imported in shell/components/FileDiff.vue
jsdiff	1.1.1	❌ Unused — no source imports found anywhere

The jsdiff package has one transitive dependency: is-equal ~0.1.0 (for deep object comparison). This transitive dep will also be removed once jsdiff is dropped (unless another package depends on it).

This is a sub-issue of #17622 ("Remove unused and misplaced dependencies").

📋 Suggested Tasks

• Confirm jsdiff has zero imports across shell/, pkg/, cypress/, scripts/ (a quick grep -r "jsdiff" . should confirm)
• Remove "jsdiff": "1.1.1" from dependencies in package.json
• Run yarn install (or yarn run upgrade:no-lock if needed) to update yarn.lock
• Verify yarn.lock no longer contains jsdiff or its exclusive transitive dep is-equal (unless used elsewhere)
• Run yarn test:ci and yarn lint to confirm no regressions
• Submit PR referencing this issue (Fixes #17627)

🔍 Debugging / Verification Steps

# Confirm jsdiff is truly unused
grep -r "jsdiff" shell/ pkg/ cypress/ scripts/ --include="*.ts" --include="*.js" --include="*.vue"

# Check if is-equal (transitive dep of jsdiff) is used by anything else
grep -r "is-equal" shell/ pkg/ --include="*.ts" --include="*.js" --include="*.vue"

# After removal, verify yarn.lock is clean
yarn install
grep "jsdiff" yarn.lock

📚 Relevant Resources

• [npm: jsdiff]((www.npmjs.com/redacted) — old "diff objects" library (not to be confused with the diff text-patching library)
• [npm: is-equal]((www.npmjs.com/redacted) — transitive dependency
• Parent issue #17622 — full dependency cleanup epic
• [Yarn docs: removing dependencies]((yarnpkg.com/redacted)

💡 Notes for the Team

• Be careful not to remove the diff package (v9.0.0) — it is actively used in shell/components/FileDiff.vue for generating unified diff patches.
• jsdiff v1.1.1 is a very old package (2014-era) for deep object comparison — completely unrelated to the diff text-patching library.
• The is-equal transitive dep is from the ~0.1.0 range (also very old) — removing jsdiff should eliminate it from the dependency tree unless another package pulls it in.

Generated by Agentic Triage for issue #17627 · ● 342.2K · ◷

[rak-phillip]

The scope of this work is too small. Rolling into #17626