Dependency Health Check

Multi-ecosystem dependency audit — find outdated, vulnerable, unused, and license-incompatible packages across npm, pip, cargo, go, and composer. Use when asked to check dependency health, audit packages, or plan upgrades.

Audit project dependencies across ecosystems for security, freshness, license compliance, and unused bloat. Produces a prioritized upgrade plan with risk assessment.

Use when: "check our dependencies", "are we up to date", "audit packages", "plan an upgrade", "find unused deps".

Step 1 — Detect Ecosystem

# Auto-detect package managers
ls package.json package-lock.json yarn.lock pnpm-lock.yaml 2>/dev/null   # Node.js
ls requirements.txt Pipfile pyproject.toml setup.py 2>/dev/null           # Python
ls Cargo.toml Cargo.lock 2>/dev/null                                       # Rust
ls go.mod go.sum 2>/dev/null                                               # Go
ls composer.json composer.lock 2>/dev/null                                 # PHP
ls Gemfile Gemfile.lock 2>/dev/null                                        # Ruby

Step 2 — Outdated Packages

Node.js

npm outdated --json 2>/dev/null | jq 'to_entries[] | {name: .key, current: .value.current, wanted: .value.wanted, latest: .value.latest}'
# or
yarn outdated --json 2>/dev/null
pnpm outdated --format json 2>/dev/null

Python

pip list --outdated --format json 2>/dev/null | jq '.[] | {name, version, latest_version}'
# or with pip-audit
pip-audit --format json 2>/dev/null

Rust

cargo outdated -R --format json 2>/dev/null

Go

go list -u -m -json all 2>/dev/null | jq 'select(.Update) | {Path, Version, Update: .Update.Version}'

PHP

composer outdated --format json 2>/dev/null

Step 3 — Vulnerability Scan

# Node.js
npm audit --json 2>/dev/null | jq '.vulnerabilities | to_entries[] | {name: .key, severity: .value.severity, fixAvailable: .value.fixAvailable}'

# Python
pip-audit --format json 2>/dev/null
# or
safety check --json 2>/dev/null

# Rust
cargo audit --json 2>/dev/null

# Go
govulncheck ./... 2>/dev/null

# Universal (if installed)
trivy fs --format json --scanners vuln . 2>/dev/null | jq '.Results[].Vulnerabilities[]? | {PkgName, Severity, Title}'

Step 4 — Unused Dependencies

Node.js

# depcheck finds unused deps
npx depcheck --json 2>/dev/null | jq '{unused: .dependencies, devUnused: .devDependencies, missing: .missing}'

Python

# Check imports vs requirements
pip install pipreqs 2>/dev/null
pipreqs . --print 2>/dev/null > /tmp/actual-imports.txt
diff <(sort requirements.txt | sed 's/[>=<].*//' | tr '[:upper:]' '[:lower:]') \
     <(sort /tmp/actual-imports.txt | sed 's/[>=<].*//' | tr '[:upper:]' '[:lower:]')

Rust

cargo udeps 2>/dev/null  # requires nightly

Step 5 — License Audit

# Node.js
npx license-checker --json 2>/dev/null | jq 'to_entries[] | {pkg: .key, license: .value.licenses}' | head -40

# Python
pip-licenses --format json 2>/dev/null | jq '.[] | {Name, License}'

# Universal
trivy fs --format json --scanners license . 2>/dev/null

Flag: GPL in MIT projects, AGPL in SaaS, unknown/unlicensed packages, dual-license packages.

Step 6 — Risk Assessment

For each outdated dependency, evaluate:

1. Severity: critical (known CVE) > high (>2 major versions behind) > medium (minor behind) > low (patch behind)
2. Breaking changes: check the changelog/release notes for breaking changes between current and latest
3. Usage frequency: grep for imports — a heavily-used dep is riskier to upgrade
4. Test coverage: if the dep's area has good tests, the upgrade is safer

Output Template

# Dependency Health Report

**Project:** [name]
**Scanned:** [date]
**Ecosystems:** Node.js, Python, etc.

## Summary
- Total dependencies: X
- Outdated: X (Y critical, Z major behind)
- Vulnerabilities: X (Y critical, Z high)
- Unused: X (safe to remove)
- License issues: X

## Critical (fix now)
| Package | Current | Latest | Issue | Risk |
|---------|---------|--------|-------|------|
| lodash | 4.17.20 | 4.17.21 | CVE-2021-23337 (prototype pollution) | High — used in 47 files |

## Recommended Upgrades (this sprint)
| Package | Current | Latest | Breaking Changes | Effort |
|---------|---------|--------|-----------------|--------|
| react | 17.0.2 | 18.3.1 | Yes — concurrent mode, new root API | 2-4 hours |

## Safe Quick Wins (patch updates)
Packages that can be bumped with minimal risk:
- `axios`: 1.6.0 → 1.7.2 (bug fixes only)
- `dotenv`: 16.3.1 → 16.4.5 (no breaking changes)

## Unused (remove)
- `moment` — imported nowhere, replaced by date-fns
- `@types/express` — no Express code found

## License Flags
- `gpl-package@1.0`: GPL-3.0 in MIT project — review compatibility

Upgrade Workflow

After the audit:

1. Fix critical vulnerabilities first (npm audit fix, pip-audit --fix)
2. Remove unused dependencies
3. Batch patch updates into one PR
4. Plan major upgrades individually with dedicated PRs
5. Run tests after each upgrade batch

Notes

• Always run the project's test suite after upgrades
• For monorepos, audit each workspace separately
• npm audit fix --force can introduce breaking changes — prefer targeted fixes
• Check CHANGELOG.md or GitHub releases for each major version jump