clawdforge/clients/php/README.md

# clawdforge — PHP SDK

PHP 8.2+ client for the [clawdforge](http://192.168.0.5:3001/Sulkta-Coop/clawdforge) LAN-only HTTP service that wraps `claude -p` subprocess calls behind a bearer-token-gated REST API.

- **PSR-4 autoload**, **PSR-12** code style, **strict types** everywhere.
- **Guzzle 7** transport, injectable `ClientInterface` for tests / custom middleware.
- **Readonly value objects** for request input, run results, file tokens, app tokens.
- **Typed exception hierarchy** so callers can discriminate auth / api / transport failures without sniffing status codes.

---

## Install

Once published, install via Composer:

```bash
composer require clawdforge/clawdforge
```

To install from a local checkout (e.g. while the SDK lives in this repo):

```jsonc
{
    "repositories": [
        { "type": "path", "url": "../path/to/clawdforge/clients/php" }
    ],
    "require": {
        "clawdforge/clawdforge": "*"
    }
}
```

## Quickstart

```php
<?php
require 'vendor/autoload.php';

use Clawdforge\Client;
use Clawdforge\RunRequest;
use Clawdforge\Exception\ForgeException;

$forge = new Client(
    baseUrl: 'http://localhost:8800',
    token: 'cf_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
);

// Liveness + claude --version smoke check.
$health = $forge->healthz();
echo $health['claude_version'], "\n";

// Run a prompt.
try {
    $result = $forge->run(new RunRequest(
        prompt: 'Reply with JSON: {"hello": "world"}',
        model: 'sonnet',
        system: 'Be terse.',
        timeoutSecs: 60,
    ));
} catch (ForgeException $e) {
    // ForgeException is the abstract base; sub-types tell you what failed.
    fwrite(STDERR, "forge: {$e->getMessage()}\n");
    exit(1);
}

echo "{$result->durationMs}ms, stop_reason={$result->stopReason}\n";

// `result` is mixed: array if the model produced valid JSON, string otherwise.
if (is_array($result->result)) {
    echo $result->result['hello'] ?? 'no key', "\n";
} else {
    echo (string) $result->result, "\n";
}
```

## API surface

| Method | Endpoint | Purpose |
|---|---|---|
| `Client::healthz()` | `GET /healthz` | Liveness + `claude --version`. |
| `Client::run(RunRequest)` | `POST /run` | Run a prompt, return a `RunResult`. |
| `Client::uploadFile(string $path, int $ttlSecs = 3600)` | `POST /files` | Stream-upload a file, return a `FileToken`. |
| `Client::createToken(string $name, array $ipCidrs = [])` | `POST /admin/tokens` | Mint a per-app token (admin-only). |
| `Client::listTokens()` | `GET /admin/tokens` | List known app tokens (admin-only). |
| `Client::revokeToken(string $name)` | `DELETE /admin/tokens/{name}` | Revoke a token (admin-only). |

### Files in a prompt

```php
$ft = $forge->uploadFile('./recipe.png', ttlSecs: 3600);
$out = $forge->run(new RunRequest(
    prompt: 'extract recipe data',
    files: [$ft->fileToken],
));
```

### Naming convention

PHP-side identifiers are camelCase; the wire JSON uses snake_case. The conversion happens at the boundary inside `RunRequest::toWire()` and the response object factories.

| PHP                          | Wire           |
|------------------------------|----------------|
| `RunRequest::$timeoutSecs`   | `timeout_secs` |
| `FileToken::$fileToken`      | `file_token`   |
| `FileToken::$ttlSecs`        | `ttl_secs`     |
| `RunResult::$durationMs`     | `duration_ms`  |
| `RunResult::$stopReason`     | `stop_reason`  |
| `AppToken::$ipCidrs`         | `ip_cidrs`     |

### Exceptions

```
Clawdforge\Exception\ForgeException        (abstract base)
├── Clawdforge\Exception\ApiException      (4xx/5xx; exposes $statusCode, $body, $decoded)
│   └── Clawdforge\Exception\AuthException (401/403)
└── Clawdforge\Exception\TransportException (Guzzle connect/timeout/TLS)
```

A single `catch (ForgeException $e)` catches all SDK failures. Narrow with `instanceof` when you need to distinguish.

A `/run` failure (subprocess timeout, claude crash, etc.) lands as a 502 with a JSON envelope — the SDK throws `ApiException` with `$statusCode = 502` and the envelope available as `$decoded` (`error`, `stderr`, `duration_ms`, `stop_reason`).

### Custom HTTP client

The constructor accepts any `GuzzleHttp\ClientInterface`, which lets you add middleware (retries, logging, circuit breakers) or swap to a mock handler in tests:

```php
use GuzzleHttp\Client as GuzzleClient;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Middleware;

$stack = HandlerStack::create();
$stack->push(Middleware::retry(/* decider */, /* delay */));

$forge = new Client(
    baseUrl: 'http://localhost:8800',
    token: $token,
    http: new GuzzleClient(['handler' => $stack, 'http_errors' => false]),
);
```

## Framework snippets

### Laravel

Bind the client as a singleton in `app/Providers/AppServiceProvider.php`:

```php
use Clawdforge\Client;

public function register(): void
{
    $this->app->singleton(Client::class, function () {
        return new Client(
            baseUrl: config('services.clawdforge.url'),
            token: config('services.clawdforge.token'),
        );
    });
}
```

`config/services.php`:

```php
'clawdforge' => [
    'url' => env('CLAWDFORGE_URL', 'http://localhost:8800'),
    'token' => env('CLAWDFORGE_TOKEN'),
],
```

Then inject anywhere:

```php
use Clawdforge\Client;
use Clawdforge\RunRequest;

class RecipeParser
{
    public function __construct(private readonly Client $forge) {}

    public function parse(string $line): array
    {
        $r = $this->forge->run(new RunRequest(
            prompt: "Sterilize this ingredient line: '{$line}'",
            system: 'You are a precise recipe parser. Always reply with valid JSON.',
            timeoutSecs: 30,
        ));
        return is_array($r->result) ? $r->result : [];
    }
}
```

### WordPress

```php
require_once ABSPATH . 'vendor/autoload.php';

use Clawdforge\Client;
use Clawdforge\RunRequest;
use Clawdforge\Exception\ForgeException;

function my_plugin_clawdforge(): Clawdforge\Client {
    static $client = null;
    if ($client === null) {
        $client = new Client(
            baseUrl: defined('CLAWDFORGE_URL') ? CLAWDFORGE_URL : 'http://localhost:8800',
            token: defined('CLAWDFORGE_TOKEN') ? CLAWDFORGE_TOKEN : '',
        );
    }
    return $client;
}

add_action('rest_api_init', function () {
    register_rest_route('myplugin/v1', '/summarize', [
        'methods' => 'POST',
        'permission_callback' => fn() => current_user_can('edit_posts'),
        'callback' => function (WP_REST_Request $req) {
            try {
                $r = my_plugin_clawdforge()->run(new RunRequest(
                    prompt: 'Summarize: ' . (string) $req->get_param('text'),
                    timeoutSecs: 30,
                ));
                return new WP_REST_Response(['summary' => $r->result], 200);
            } catch (ForgeException $e) {
                return new WP_Error('clawdforge', $e->getMessage(), ['status' => 502]);
            }
        },
    ]);
});
```

## Testing

The SDK ships with PHPUnit 10 tests that mock Guzzle via `GuzzleHttp\Handler\MockHandler` — no live network.

```bash
composer install
vendor/bin/phpunit
```

`php -l` over every source file:

```bash
find src -name '*.php' -exec php -l {} \;
```

## Design notes

- **No retries.** `claude -p` runs are not idempotent (they spawn subprocesses with side effects). Wrap calls in your own retry layer if you need one — Guzzle's `Middleware::retry` plugs right into the constructor.
- **HTTP timeout = subprocess timeout + 30 s margin.** Keeps the client from bailing while clawdforge is still doing legitimate work for us. Override via the `httpTimeoutMargin` constructor argument.
- **Streamed file uploads.** `uploadFile()` opens the file via `fopen($path, 'r')` and hands the resource to Guzzle's multipart adapter; payloads never get slurped into memory.
- **Plaintext token discipline.** `createToken()` returns the plaintext bearer in `AppToken::$token` exactly once. `listTokens()` always returns `null` for that field — the server keeps only a sha256 hash. Persist immediately on mint.

## License

MIT.