@readystack/fedramp-oscal-ssp-lint

FedRAMP OSCAL SSP Lint

16 checks on a system-security-plan JSON, in your editor, before a validator returns the package

Install

npx @readystack/fedramp-oscal-ssp-lint file

Node 18+. The same 16 rules as the VS Code extension, from a terminal or CI.

Free

• Checks one OSCAL system-security-plan JSON with all 16 rules and lists every defect with its JSON path, severity and the fix. On the bundled sample the clean plan returns 0 findings and the generated plan returns 19 findings across 14 of the 16 checks, including last-modified 503 days stale as of 2026-09-17 and control cp-9 planned with a completion date 79 days past.
• --rules lists every rule

With a licence ($29 once)

• Sweeps every OSCAL file in the workspace, resolves uuid references across the whole package instead of within one file, and writes a dated report to hand to a 3PAO. $29 once, one licence key per person or CI seat.

@readystack/fedramp-oscal-ssp-lint --dir ./templates --report html --out report.html

Hand-review by a FedRAMP advisory consultant runs $150 to $300 an hour

Use from an AI agent (MCP)

Claude Code · Cursor · Windsurf · any MCP client - add to your MCP config:

{ "mcpServers": { "fedramp-oscal-ssp-lint": { "command": "npx", "args": ["-y", "@readystack/fedramp-oscal-ssp-lint", "--mcp"] } } }

Tools: check_text and check_file (free) · check_dir (licence). The agent gets every finding with the line number.

Use in CI

- name: FedRAMP OSCAL SSP Lint
  run: npx -y @readystack/fedramp-oscal-ssp-lint --dir . --ci

(container: docker run --rm -v "$PWD:/work" getreadystack/fedramp-oscal-ssp-lint --dir /work --ci)

The folder sweep, reports and CI mode need one licence — one payment, no subscription. Set READYSTACK_LICENSE=<key> or run --license <key> once.

Get a licence