@dualmark/cli

dualmark verify <url> — conformance test runner for the AEO Specification.

Install

bun add -d @dualmark/cli
# or run directly:
bunx @dualmark/cli verify https://example.com/blog/hello

Usage

dualmark verify https://example.com/blog/hello
dualmark verify https://example.com/blog/hello.md --skip-negotiation
dualmark verify https://example.com --json
dualmark verify https://example.com --timeout 5000

Flags

| Flag | Effect | | -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | --json | Emit machine-readable JSON (AEO Spec v1.0) instead of human-readable text; cannot be combined with --quiet or --color | | --quiet | Suppress successful text output (failures still print report) | | --color | Enable color mode for text output (reserved; currently no-op) | | --no-color | Disable color mode for text output (reserved; currently no-op) | | --skip-negotiation | Skip Accept-header / Link-header / 406 checks. Use against sites that serve markdown only at .md URLs without runtime content negotiation (e.g. static-only deploys) | | --timeout <ms> | Per-request timeout (default 10000) |

JSON output schema (AEO Spec v1.0)

When --json is set, the CLI prints this object:

{
  "url": "https://example.com/blog/hello",
  "markdownUrl": "https://example.com/blog/hello.md",
  "score": 95,
  "max": 100,
  "level": "advanced",
  "skippedNegotiation": false,
  "durationMs": 123,
  "checks": [
    {
      "id": "md.fetch",
      "points": 20,
      "max": 20,
      "passed": true,
      "message": "OK"
    }
  ]
}

Notes:

• level is one of none, basic, standard, advanced.
• skippedNegotiation indicates whether --skip-negotiation was used.
• checks[].points is 0 when a check fails, otherwise equal to checks[].max.
• checks preserve the canonical check evaluation order from the conformance runner.

Exit codes

• 0 — pass (score ≥ 80% of max)
• 1 — fail (below threshold or any required check failed)
• 2 — CLI usage error

For GitHub Actions, GitLab CI, and Docker examples, see the Use in CI guide.

Programmatic usage

import { verifyUrl } from "@dualmark/cli";
const report = await verifyUrl("https://example.com/blog/hello");
console.log(report.score, "/", report.maxScore);

What's checked

• md.fetch — markdown twin URL is reachable (2xx)
• md.contentType — text/markdown; charset=utf-8
• md.tokensHeader — X-Markdown-Tokens is a positive integer
• md.noindex — X-Robots-Tag includes noindex
• md.vary — Vary includes Accept
• md.body — body is non-empty
• md.aeoVersion — X-AEO-Version advertised (recommended)
• md.nosniff — X-Content-Type-Options: nosniff (recommended)

When negotiation is enabled (default):

• html.reachable — HTML URL is 2xx
• html.linkAlternate — HTML response advertises markdown twin via Link rel="alternate"
• html.vary — HTML response Vary: Accept (recommended)
• negotiation.botUa — GPTBot UA receives markdown
• negotiation.acceptHeader — Accept: text/markdown receives markdown
• negotiation.notAcceptable — Accept that excludes html+markdown returns 406 (recommended)

License

Apache 2.0