diff --git a/docker-compose.yml b/docker-compose.yml
index fe1194a..c548248 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -75,7 +75,8 @@ services:
       SCRAPER_HOST: 0.0.0.0
       SCRAPER_PORT: "8091"
       SCRAPER_TOKEN_FILE: /run/secrets/scraper_token
-    networks: [backend, egress]
+      SOURCE_PLUGIN_URL: ${SOURCE_PLUGIN_URL:-}
+    networks: [backend, egress, plugin_backend]
     healthcheck:
       test: [CMD, node, tools/healthcheck.js, scraper]
       interval: 30s
@@ -108,9 +109,38 @@ services:
       start_period: 60s
       retries: 3
 
+  source-plugin-weebcentral:
+    image: ${APP_IMAGE:-mangacircus:local}
+    build:
+      context: .
+      args:
+        VCS_REF: ${VCS_REF:-development}
+    profiles: [source-plugins]
+    command: [node, scraper/plugins/worker.js]
+    init: true
+    restart: unless-stopped
+    read_only: true
+    tmpfs: [/tmp]
+    security_opt: [no-new-privileges:true]
+    cap_drop: [ALL]
+    pids_limit: 64
+    mem_limit: 256m
+    environment:
+      SOURCE_PLUGIN_HOST: 0.0.0.0
+      SOURCE_PLUGIN_PORT: "8094"
+    networks: [plugin_backend]
+    healthcheck:
+      test: [CMD, node, tools/healthcheck-source-plugin.js]
+      interval: 30s
+      timeout: 5s
+      start_period: 15s
+      retries: 3
+
 networks:
   backend:
     internal: true
+  plugin_backend:
+    internal: true
   egress: {}
 
 secrets:
diff --git a/docs/scraper-service.md b/docs/scraper-service.md
index 1fb29fe..aa5f84f 100644
--- a/docs/scraper-service.md
+++ b/docs/scraper-service.md
@@ -5,6 +5,32 @@ It owns the durable queue and is the only process allowed to run a queued archiv
 The browser never contacts it directly: authenticated admin routes in `server.js`
 proxy commands to its private HTTP API.
 
+## First-party source parser pilot
+
+The WeebCentral parser is now a reviewed first-party module in
+`scraper/plugins/weebcentral.js`. By default it runs in the scraper process,
+preserving the existing deployment. To test process isolation in Compose, start
+the `source-plugins` profile and set `SOURCE_PLUGIN_URL` for the scraper to
+`http://source-plugin-weebcentral:8094` (for example via the Compose environment).
+Both settings are required; enabling the URL without a healthy worker causes
+WeebCentral discovery to fail closed and retain its checkpoint. Remove the URL
+to roll back. Do not restart a live scraper merely to try this option; use the
+normal checkpoint-safe deployment procedure.
+
+The worker has no published port, egress network, library/data mount, or token.
+Only the existing rate-limited scraper HTTP client fetches remote HTML/images.
+The worker accepts bounded HTML for four parsing steps over its internal-only
+network. It loads only modules listed in the static first-party registry; there
+is no runtime plugin download or execution of Uchiyomi packages. This is a
+parser-isolation pilot, **not yet** a complete generic source-plugin contract,
+or migration of the MangaDex runner. Parsed catalog and image URLs are checked
+before use, and parser requests/responses are size-bounded. When the worker is
+enabled, WeebCentral requests use a pinned-DNS HTTPS transport that validates
+each redirect and stops on access errors; the ordinary in-process path is not
+changed. Public image hosts are not yet restricted to a reviewed CDN allowlist.
+Keep the profile off in production until a separate deployment validation is
+completed.
+
 ## Start and storage
 
 ```bash