audit-and-reduce-dependencies

Audit and reduce dependencies

Reduce JavaScript dependency footprint. Use pnpm only. Preserve the lockfile, workspace layout, and dependency range style unless there is a concrete reason to change them.

For GitHub Actions workflow triage (action choice, permissions, pinning), use a dedicated workflow audit — not the reporting format below (workflow file + step only when the finding is pnpm install policy).

Workflow

1. Hardening gate: run /check-npm (read-only). See check-npm.
2. Establish the baseline.
3. Remove unused direct dependencies.
4. Deduplicate direct dependency versions in monorepos.
5. Rank direct dependencies by transitive lockfile closure.
6. Use closure data to find low-risk minor/patch upgrades.
7. Use closure data to find trivial dependencies worth inlining.
8. Check e18e recommendations for replacements/removals.
9. Reinstall, verify, and report measured impact.

Step 0: Hardening gate (/check-npm)

Run `/check-npm` before mutating manifests or lockfiles.

• If any check FAILs: report the table and fix snippets; do not weaken pnpm-workspace.yaml, .npmrc, CI install flags, or Renovate age gates during cleanup.
• Do not paste full hardening config into this workflow — /check-npm owns version thresholds, script policy, git-dep protocols, and min release age.
• If the user only asked for hardening (not reduction), stop after /check-npm unless they also want cleanup.

pnpm 11+: script and release-age policy live in pnpm-workspace.yaml, not .npmrc or package.json#pnpm (pnpm 11 no longer reads the package.json#pnpm field). Verify each key against the installed pnpm major before suggesting config. Never add unsupported keys. Do not lower an existing minimumReleaseAge (or org equivalent) during cleanup.

Dependency triage

For each non-trivial direct dependency (especially after Steps 4–7), assign one label:

Replacements and new direct deps

• No new direct dependencies (including swaps) without explicit user approval.
• Prefer Remove (inline/native APIs) over Replace-with-Better when equivalent.
• For Replace-with-Better: state why (maintenance, security, smaller tree); prefer actively maintained, widely adopted packages from trusted maintainers.
• Respect repo minimumReleaseAge / Renovate gates; command-level 72h freshness is a floor, not permission to bypass stricter config.

pnpm & supply-chain

Confirm the repo uses pnpm: pnpm-lock.yaml, pnpm-workspace.yaml, and/or packageManager / devEngines.packageManager.name set to pnpm in root package.json. If not on pnpm, stop — do not migrate package managers as part of cleanup.

Respect repo install policy when present (e.g. pnpm install --frozen-lockfile --ignore-scripts).

Lifecycle scripts: Always --ignore-scripts on pnpm install, pnpm add, and pnpm remove unless the user explicitly writes allow scripts in the same message (state which scripts would run and the risk). For pnpm dlx, dlx does not accept --ignore-scripts directly — use pnpm --config.ignore-scripts=true dlx (flags after dlx are forwarded to the executed binary). If a dependency legitimately needs a build script (native modules, etc.), finish without scripts, then ask whether to run a specific manual rebuild (e.g. pnpm rebuild <pkg>).

Freshness check (≥ 72 hours) — required before any command that adds or upgrades a named package version (pnpm add, pnpm dlx with new/upgraded direct version). Not required for plain pnpm install / pnpm remove with no new package argument.

For each directly named package:

1. curl -s https://registry.npmjs.org/<package-name>
2. Resolve version: pinned pkg@1.2.3 → that version; range/latest/unspecified → dist-tags.latest
3. Read time["<version>"]
4. If published less than 72 hours ago → stop. Tell the user package, version, and exact age. Suggest an older known-good pin unless they write override freshness check.
5. `@grafana/** scoped packages are **exempt** from the freshness check; --ignore-scripts` still applies.

After a failed freshness check, do not substitute a different version without user approval.

Safety rules

• Work in small batches so lockfile diffs remain reviewable.
• Never trust unused-dependency tools blindly; verify imports, config files, scripts, generated code hooks, framework conventions, plugin names, CLIs, and dynamic imports.
• You may write scripting and parsing to verify package.json and lockfile dependency accounts.
• Treat peerDependencies, optionalDependencies, package bin usage, test fixtures, and published package manifests as higher risk.
• Do not remove or inline dependencies used for security, parsing, crypto, Unicode, URL handling, date/time, i18n, or platform compatibility unless the replacement is proven equivalent.
• Do not switch package managers, delete pnpm-lock.yaml, or rewrite workspace structure as part of cleanup.
• Treat pnpm dedupe as potentially behavior-changing; inspect lockfile diffs and run focused verification before keeping the result.
• Measure before and after: direct dependency count, lockfile line count or entry count, package count, and estimated node_modules size when available.

Step 1: Baseline

Collect:

• All package.json files and workspace boundaries (pnpm-workspace.yaml).
• pnpm-lock.yaml, pnpm-workspace.yaml security settings (minimumReleaseAge, strictDepBuilds, blockExoticSubdeps, allowBuilds), and install policy in .npmrc / CI flags (e.g. --frozen-lockfile, --ignore-scripts).
• Direct dependency names by manifest section: dependencies, devDependencies, peerDependencies, optionalDependencies.
• Existing verification commands from scripts, CI, or repo docs.
• CI spot-check (.github/workflows or equivalent): installs should use pnpm install --frozen-lockfile and script blocking consistent with workspace config. Flag workflows that regenerate lockfiles on every run.
• Renovate / Dependabot (if present): note minimumReleaseAge for npm packages; do not reduce it during cleanup.

Record baseline metrics: git status --short, wc -l pnpm-lock.yaml. If node_modules is installed, estimate footprint with platform-appropriate tools. Lockfile reductions are the primary metric — do not depend on node_modules being present.

Step 2: Remove unused direct dependencies

Unsafe direct dependency protocols — scan all workspace package.json dependency sections. Flag values that are not: semver range, workspace:, patch:, or npm: alias to semver. Flag git: / github: / tarball URLs / user/repo shorthand / file: / link: / exec: / etc. (same allow-list as /check-npm). Do not remove flagged entries silently; report for a separate hardening PR unless the user asked to fix them.

Use a static analyzer as a starting point, not as proof (knip, depcheck, or repo-native tooling). Run with pinned pnpm --config.ignore-scripts=true dlx <tool>@<version> <args...> when not installed (freshness-check the pin first).

For each candidate:

• Search code, configs, package scripts, build tooling, tests, and docs for the package name and known import paths.
• Check whether required by a published package manifest, peer contract, plugin loader, CLI command, or dynamic require/import.
• Remove only when no real usage remains.
• Run pnpm install --ignore-scripts (+ repo flags) and focused verification.

If usage is only in a script or config, consider moving between dependencies and devDependencies instead of removing.

Step 3: Deduplicate monorepo direct versions

Look for the same direct dependency declared with multiple versions/ranges across package manifests. Use existing policy first: exact pins, caret ranges, catalog/protocol usage, workspace protocol, or central constraints.

• Use syncpack list-mismatches or equivalent for discovery.
• Standardize direct ranges when packages can share the same compatible version.
• Prefer manifest-level consistency before adding pnpm.overrides.
• Use pnpm.overrides only for transitive convergence or security fixes, and document why.

After deduping, run pnpm install --ignore-scripts (+ repo flags) and inspect manifest and lockfile diffs. Then consider pnpm dedupe — apply carefully; may change transitive resolution.

Step 4: Rank transitive lockfile closure

For each important direct dependency, estimate closure: transitive lockfile entries reachable from that dependency.

Report both:

• Total closure: all packages reachable from the dependency.
• Exclusive closure: packages that disappear if this dependency is removed and are not retained by other direct dependencies.

Prefer deterministic measurement:

1. Save baseline lockfile metrics.
2. Temporarily remove one direct dependency from the owning manifest.
3. Run pnpm install --ignore-scripts (+ repo flags).
4. Measure lockfile line/entry reduction and package count reduction.
5. Revert the manifest and pnpm-lock.yaml (e.g., git checkout -- <manifest> pnpm-lock.yaml) before measuring the next dependency.

Use pnpm why <pkg> for large transitive packages. Rank by impact and risk, not just raw size.

Step 5: Find low-risk high-impact upgrades

Use closure rankings to target direct dependencies whose newer minor/patch versions reduce transitive dependencies.

For each candidate:

• Check available non-major versions with pnpm outdated.
• Review changelog/release notes for dependency tree changes.
• Freshness-check the target version, then upgrade one dependency or tight cluster at a time (pnpm add <pkg>@<version> --ignore-scripts).
• Run pnpm install --ignore-scripts (+ repo flags) and compare closure metrics.
• Run focused tests and relevant build/typecheck commands.

Avoid major upgrades unless the user explicitly accepts the migration risk.

Step 6: Inline trivial usage

Use closure rankings to find direct dependencies with small, obvious usage but large transitive cost.

Inline only when all are true:

• Usage is tiny and easy to fully characterize.
• Equivalent code is shorter or clearer than retaining the dependency.
• Behavior is covered by tests or can be covered with small characterization tests.
• The dependency is not solving cross-platform, security, parsing, Unicode, locale, or spec-compliance edge cases.

Prefer native APIs over new replacement dependencies when the required behavior is simple.

Step 7: Apply e18e guidance

# Pin @e18e/cli@<version> after freshness check; disable scripts on the dlx install
pnpm --config.ignore-scripts=true dlx @e18e/cli@<version> analyze
pnpm --config.ignore-scripts=true dlx @e18e/cli@<version> migrate --dry-run

Also check https://e18e.dev/docs/replacements/. Treat recommendations as candidates, not mandates; verify bundle/runtime behavior and run tests. Map e18e swaps to Replace-with-Better only after user approval.

Reporting

Summarize outcomes with measured impact:

• /check-npm result (PASS/FAIL summary; link fixes if FAIL).
• Direct dependencies removed or moved.
• Direct versions deduplicated.
• Lockfile line/entry reduction.
• Estimated package or node_modules reduction when available.
• High-impact candidates deferred and why (including replacements awaiting approval).
• Unsafe protocol / CI / Renovate findings from baseline (if any).
• Verification commands run and results.
• Supply-chain: versions freshness-checked (or exempted), --ignore-scripts on all installs/adds, --config.ignore-scripts=true on pnpm dlx.

Call out risk explicitly when a removal depends on static analysis rather than runtime coverage.

Reporting format

Use for dependency cleanup findings only — not GitHub Actions workflow triage.

For each finding:

• Evidence: package name and version/range; manifest path and section; supporting signal (import site, pnpm why, knip/depcheck hit, closure measurement, /check-npm row, or workflow file + step only for pnpm install policy).
• Decision: one of Dependency triage labels.
• Proposed change: exact manifest/lockfile command or edit. If not applied yet, state that explicitly.
• Rationale: footprint (exclusive/total closure), supply-chain, maintenance, or verification risk.
• User review required: tests/build/typecheck to run; peer/plugin/CLI consumers; published-package or dynamic-import risk; approval before Replace-with-Better or any new direct dependency.

Use one block per package (or per protocol/CI finding), not a single-line summary, when the finding is non-trivial.