From a Broken Dependabot PR to Building My First CI Dev Tool

Description and use

Syncmydep automatically syncs dependency manifests and lockfiles, preventing CI failures from drift, applies security fixes, and creates PRs, saving developers time.

Problem

Dependabot PRs can cause CI failures when package.json and lockfiles drift apart, leading to manual, error‑prone fixes.

Outcome

Syncmydep eliminates CI crashes caused by lockfile drift, automates vulnerability remediation, cleans monorepo lockfiles, and can be triggered via comment or run in check‑only mode, saving developers time and reducing manual errors.

Workflow

• Detect changes in package.json or equivalent manifest
• Run appropriate lockfile regeneration command (npm ci, pnpm install, yarn install, bun install, deno task)
• Apply audit fix for vulnerabilities
• Clean up ghost lockfiles in monorepo setups
• Commit updated lockfile to a new branch
• Create or update a PR with the changes
• Optionally trigger sync via comment on an existing PR

Evidence

Dependabot had updated my package.json, but package-lock.json failed to sync properly. As a result, npm ci crashed during the CI run due to mismatched lockfile integrity.

Source

Syncmydep detects manifest changes, runs fast lockfile updates, handles vulnerability fixes, and keeps your branch clean.

Source