### Install dependencies and run specification checks

Source: https://mailschema.org/tools

Run these npm commands in a repository checkout to install dependencies and validate contracts, example digests, JSON-LD expansion, shape vectors, and runtime scenario references. Requires Node.js 24 or later.

```bash
npm ci
npm run spec:check
npm run draft:check
```

--------------------------------

### Local verification commands

Source: https://mailschema.org/contribute

Run these commands from the repository root to install dependencies, generate the specification, and verify the project. The browser and repository use the same parsers, and repository verification also checks examples, digests, and generated artifacts.

```bash
npm ci
npm run spec:generate
npm run verify
```

--------------------------------

### HTTP readReview request and response

Source: https://mailschema.org/examples

The installed integration selects readReview. The service supplies the current proposal, permitted decisions, and the actual content to inspect. The example omits credentials; a real read uses the account already authorized for this service.

```http
GET /reviews?reference=urn%3Aexample%3Aproposal%3Ap7 HTTP/1.1
Host: service.example
Accept: application/json

HTTP/1.1 200 OK
Content-Type: application/json

{
  "review_id": "p7",
  "interaction": "urn:uuid:0199a6c2-4b1e-7c3a-9d2e-5f8a1b2c3d41",
  "service": {
    "id": "https://service.example",
    "tenant": "urn:example:tenant:7"
  },
  "addressed_to": "owner@example.net",
  "subject": {
    "id": "urn:example:object:42",
    "title": "Publish the getting started guide"
  },
  "contract": {
    "id": "https://mailschema.org/types/publication-approval",
    "version": "0.1",
    "contractDigest": "sha-256:de91a49de4cba91209be253456e7c56709791fff877a060560d4eada0cc9468c"
  },
  "reference": "urn:example:proposal:p7",
  "revision": "p7-r4",
  "expires_at": "2026-10-03T08:00:00Z",
  "allowed_actions": [
    "approve",
    "decline",
    "request-changes"
  ],
  "publication": {
    "summary": "Publish the approved getting started guide.",
    "requester": "Documentation editor",
    "content": {
      "id": "urn:example:content:42",
      "revision": "r4",
      "title": "Getting started",
      "digest": "sha-256:4ffdf504c44a73a059c09c9cb30362c04f593b3af405b83bc084bb045067f95c"
    },
    "destinations": [
      {
        "id": "https://docs.service.example/guide",
        "account": "urn:example:account:7",
        "visibility": "public"
      }
    ],
    "schedule": {
      "mode": "immediate"
    }
  },
  "state": "awaiting_review",
  "content_artifact": {
    "media_type": "text/markdown",
    "text": "# Getting started\n\nCreate a workspace, connect your inbox and invite your team.\n"
  }
}
```

--------------------------------

### Install Python package via pip

Source: https://mailschema.org/tools

Install the mailschema Python package version 0.3.0 from PyPI. Provides the profile record, context, and schemas.

```bash
pip install mailschema==0.3.0
```

--------------------------------

### Install mailschema and check contract and description

Source: https://mailschema.org/tools

Install the mailschema npm package (Node.js 22 or later), download the Campaign Send Approval contract and its complete description, then run the mailschema contract and description commands. Nothing is uploaded or changed. The contract command prints the contract's identifier and version, then its digest. The description command prints the description's @id and its own digest; with --contract it first checks that the description uses that contract. Each digest is the SHA-256 of the document's RFC 8785 canonical JSON.

```bash
npm install mailschema@0.3.2
curl -O https://mailschema.org/artifacts/map-0.3/contracts/campaign-send-approval-0.1.json
curl -O https://mailschema.org/artifacts/map-0.3/examples/campaign-send-approval.json
npx mailschema contract campaign-send-approval-0.1.json
npx mailschema description campaign-send-approval.json --contract campaign-send-approval-0.1.json
```

--------------------------------

### Install Ruby gem via gem install

Source: https://mailschema.org/tools

Install the mailschema Ruby gem version 0.3.0 from RubyGems. Provides MAP 0.3 processing, artifacts, and helpers for the description part and qualifying signatures.

```bash
gem install mailschema -v 0.3.0
```

--------------------------------

### Get Go module via go get

Source: https://mailschema.org/tools

Fetch the mailschema Go module version 0.3.0 from Go modules. Provides the profile record, context, and schemas embedded.

```bash
go get github.com/mailschema/go@v0.3.0
```

--------------------------------

### Install JavaScript package via npm

Source: https://mailschema.org/tools

Install the mailschema JavaScript package version 0.3.2 from npm. Provides MAP 0.3 processing, TypeScript definitions, artifacts, and a local CLI.

```bash
npm install mailschema@0.3.2
```

--------------------------------

### Expected output from mailschema contract and description commands

Source: https://mailschema.org/tools

Shows the output of the mailschema contract and description commands for the Campaign Send Approval example. The contract output prints the contract identifier and version, then its SHA-256 digest. The description output prints the description's @id and its own digest.

```text
Valid type contract https://mailschema.org/types/campaign-send-approval 0.1
sha-256:de3c88a0712adb1d0c6e82f437b825c83520d8e1c44c7b032a2cfcfe5ce55731
Valid MAP 0.3 description urn:uuid:0199a6c2-4b1e-7c3a-9d2e-5f8a1b2c3d40
sha-256:850cebcbd01af512c9a360adfdc5f672d08f5bc54ae68539508b5eb98cc44be1
```