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# Dependency Auditor > **Skill Type:** POWERFUL · **Category:** Engineering · **Domain:** Dependency Management & Security Offline, deterministic dependency auditing across 8+ package ecosystems. The three scripts are pattern-matchers over manifests/lockfiles — they do **not** call live advisory APIs; pair their findings with `npm audit` / `pip-audit` / `cargo audit` for current CVE coverage. ## Quick Start ```bash # 1. Scan for vulnerabilities (built-in offline CVE pattern set; exit non-zero on high severity) python3 scripts/dep_scanner.py /path/to/project --format json --fail-on-high -o scan.json # 2. Check license compliance and conflicts python3 scripts/license_checker.py /path/to/project --policy strict --format json -o licenses.json # 3. Plan upgrades from the scanner's inventory python3 scripts/upgrade_planner.py scan.json --risk-threshold medium --timeline 90 --format json -o plan.json ``` Consume the outputs: `scan.json` findings drive which packages to pin/patch now; `licenses.json` conflicts go to the user as a legal-risk list; `plan.json` orders upgrades by risk with rollback notes. `--quick-scan` skips transitive deps; `--security-only` limits the plan to security fixes. **Verification loop:** after applying upgrades, re-run step 1 and assert 0 high-severity findings before closing the audit. ## Supported Ecosystems | Language | Manifests parsed | |---|---| | JavaScript/Node | package.json, package-lock.json, yarn.lock | | Python | requirements.txt, pyproject.toml, Pipfile.lock, poetry.lock | | Go | go.mod, go.sum | | Rust | Cargo.toml, Cargo.lock | | Ruby | Gemfile, Gemfile.lock | | Java | pom.xml, gradle.lockfile | | PHP | composer.json, composer.lock | | C#/.NET | packages.config, project.assets.json | ## License Classification - **Permissive**: MIT, Apache 2.0, BSD (2/3-clause), ISC - **Copyleft (strong)**: GPL v2/v3, AGPL v3 — flags contamination risk in permissive projects - **Copyleft (weak)**: LGPL v2.1/v3, MPL 2.0 - **Proprietary / Dual / Unknown** — unknown licenses are surfaced for manual review The checker analyzes license inheritance through dependency chains and emits conflict pairs with remediation suggestions. ## Upgrade Risk Matrix | Risk | Update type | Handling | |---|---|---| | Low | Patch, security fixes | Apply immediately | | Medium | Minor with new features | Batch into scheduled update | | High | Major version, API changes | Dedicated migration task + tests | | Critical | Known breaking changes | Planned migration with rollback procedure | Prioritization: security patches > bug fixes > feature updates > major rewrites; deprecated features get immediate attention. ## Scripts (accurate capability claims) - **`scripts/dep_scanner.py`** — multi-format parser; built-in offline vulnerability pattern set (~16 CVE patterns — a smoke layer, not a replacement for live advisories); transitive resolution from lockfiles; JSON + text output. - **`scripts/license_checker.py`** — license detection from package metadata; compatibility matrix across 20+ license types; `--policy permissive|strict`; conflict detection with remediation. - **`scripts/upgrade_planner.py`** — semver-based breaking-change prediction; risk-ordered migration plan with testing checklist and timeline estimation. Sample fixtures: `test-project/` and `test-inventory.json` in this folder; expected shapes in `expected_outputs/`. ## CI Integration ```bash # Security gate in CI python3 scripts/dep_scanner.py . --format json --fail-on-high python3 scripts/license_checker.py . --policy strict --format json ``` ## Best Practices 1. **Prioritize security**: address high/critical findings immediately; license compliance before functionality. 2. **Gradual updates**: incremental upgrades with thorough testing; feature flags for risky bumps. 3. **Cadence**: security scans per commit; license audits monthly; full audit quarterly. 4. **False positives**: whitelist with documentation; contact maintainers for license ambiguity. See [README.md](README.md) for detailed usage and `references/` for the vulnerability/license knowledge bases.