Carcin Migrator

Trojan-horse WordPress plugin that gives Carcin's migration pipeline complete, read-only-except-when-necessary access to a live WordPress site so it can be lifted onto a tenant's Cloudflare (R2 + D1 + Workers) infrastructure without SSH, cPanel, or filesystem access.

Deployment model

1. Client invites carcin@carcin.ai as a WordPress Administrator.
2. Carcin operator (or a WP admin the client already trusts) installs carcin-wp-migrator — either upload the built zip via Plugins → Add New → Upload, or wp plugin install <url-to-zip> from a shell.
3. On activation the plugin:
   • Generates a 256-bit bearer token, hashed at rest in wp_options (carcin_migrator_token_hash).
   • Registers REST routes under carcin/v1.
   • Shows a one-time admin notice with the raw token (also on Tools → Carcin Migrator, self-clearing on first view).
4. Carcin's tenant Worker (carcin-tenant-template, /connections/wordpress) calls the plugin's REST API with the token and streams the site into the tenant's provisioned R2 bucket + D1.
5. After cutover the plugin stays installed as the rollback path until the client confirms migration success. DELETE /carcin/v1/self deactivates + uninstalls; POST /rollback/arm sets a frontend 302 to the new host as a live cutover switch.

REST surface — namespace carcin/v1

All routes are Authorization: Bearer <token>. Rate-limited to 6000 requests / 10s per IP (sized for a real migration burst, not for probing).

Read routes: GET /status, GET /manifest, GET /db/tables, GET /db/schema?table=X, GET /db/dump?table=X&offset=N&limit=M, GET /db/checksum?table=X, GET /fs/tree?path=&depth=&hash=, GET /fs/file?path=.

Write routes (deliberately narrow): POST /fs/push-to-r2, POST /verify, POST /rollback/arm, POST /rollback/disarm, POST /token/rotate, DELETE /self.

Full details in SPEC.md.

Development

Local WP + plugin + smoke-test loop:

docker compose -f docker-compose.test.yml up -d
docker compose -f docker-compose.test.yml exec -T wpcli wp core install \
  --url=http://localhost:18080 --title="Carcin Test" \
  --admin_user=admin --admin_password=admin --admin_email=admin@example.com \
  --skip-email --path=/var/www/html
docker compose -f docker-compose.test.yml exec -T wpcli wp plugin activate \
  carcin-wp-migrator --path=/var/www/html
TOKEN=$(docker compose -f docker-compose.test.yml exec -T wpcli \
  wp option get carcin_migrator_token_plain_once --path=/var/www/html)
curl -H "Authorization: Bearer $TOKEN" \
  "http://localhost:18080/?rest_route=/carcin/v1/status"

The full tenant-side importer runs against the same fixture — see carcinai/carcin-tenant-template test/wp-import.e2e.test.ts (env-gated on CARCIN_WP_URL + CARCIN_WP_TOKEN).

Related repos

• Tenant importer: carcin-tenant-template/src/wp-import.ts + src/wp-connection.ts
• Connector registry: carcin-core (services/connectors/registry.py, provider wordpress_plugin)
• Cloud UI + orchestration: carcin-cloud (app/(app)/connections/wordpress_plugin/connect/page.tsx, app/api/carcin-wp/{run,status}/route.ts)
• Rollout runbook: carcin-core/docs/runbooks/ship-wordpress-plugin-connector.md
• Cross-repo orchestration spec: carcin-core/specs/platform/wordpress-plugin-migration-orchestration.md

Distribution

Zipped copy served at https://carcin.app/plugins/carcin-wp-migrator.zip (staged in carcin-cloud/public/plugins/; shipped by CI on merge to main).

Not yet on the WordPress.org plugin directory. See the handoff doc for why that matters and what to do next.