diff --git a/deploy/ecosystem/docker-compose.yml b/deploy/ecosystem/docker-compose.yml
index a49082e..0cca3ec 100644
--- a/deploy/ecosystem/docker-compose.yml
+++ b/deploy/ecosystem/docker-compose.yml
@@ -8,6 +8,18 @@
 #
 # Maven's own compose joins this same network (add `ecosystem` as an external
 # network there) to reach nexus:9740 / praxis:8989 / hexis:9741 directly.
+#
+# NO RELEASE PINNING (Vikunja #354): each `build:` below points at a sibling
+# WORKING TREE, so `up --build` ships whatever is checked out there, including
+# uncommitted edits. Before bringing this up, check what you are about to
+# deploy:
+#
+#   for r in nexus praxis hexis; do git -C ../../../$r status --short; \
+#     git -C ../../../$r log -1 --oneline; done
+#
+# The host nginx that fronts these is deploy/ecosystem/nginx.conf — it binds
+# the wg and LAN addresses only, with allow/deny. Keep it that way: none of
+# these containers has auth of its own.
 name: ecosystem
 
 services:
diff --git a/deploy/ecosystem/nginx.conf b/deploy/ecosystem/nginx.conf
index a511b03..7e84902 100644
--- a/deploy/ecosystem/nginx.conf
+++ b/deploy/ecosystem/nginx.conf
@@ -1,6 +1,7 @@
-# Reverse-proxy the three sibling admin UIs. Drop into your nginx sites (or the
-# nginx-panel app) and reload. Assumes the compose publishes each service on
-# 127.0.0.1:<port>. Add TLS (certbot / your existing cert block) per server.
+# Reverse-proxy Maven's own web UI plus the three sibling admin UIs. Drop into
+# your nginx sites (or the nginx-panel app) and reload. Assumes the compose
+# publishes each service on 127.0.0.1:<port>. Add TLS (certbot / your existing
+# cert block) per server.
 #
 # NOTE: hexis.<domain> previously pointed at the MCP tool — repoint that
 # elsewhere first (the app now owns hexis.*).
@@ -12,6 +13,50 @@
 # Do NOT "fix" a failed bind by reverting to `listen 80` (all interfaces) —
 # that removes the only access control these containers have.
 
+# maven.<domain> → mavweb (docker-compose.yml publishes it on 127.0.0.1:9201).
+# Same bind + ACL as the siblings, and for a stronger reason: mavweb serves
+# POST /tools, which defines argv that internal/tool EXECUTES, plus POST
+# /routines, /api/revert and /api/chat (Vikunja #317). Without
+# -webauthn-origin/-webauthn-rpid mavweb has no auth of its own, so this block
+# is the auth. If you add TLS and a basic-auth/oauth2-proxy layer, keep the
+# allow/deny anyway — belt and braces on an RCE surface.
+#
+# WebSocket upgrade matters here: /ws carries push-to-talk audio, so the
+# Upgrade/Connection headers below are required, not decoration. The map keeps
+# `Connection: upgrade` off plain requests; it sits in the http context, which
+# is where sites-available files are included — if your nginx already defines
+# $connection_upgrade, drop this block.
+map $http_upgrade $connection_upgrade {
+    default upgrade;
+    ''      close;
+}
+
+server {
+    listen 10.42.0.1:80;
+    listen 192.168.1.104:80;
+    server_name maven.kvmx.ru;
+
+    allow 10.42.0.0/24;
+    allow 192.168.1.0/24;
+    deny all;
+
+    # push-to-talk uploads raw PCM; the default 1m is enough for a short
+    # utterance but not for a long one.
+    client_max_body_size 32m;
+
+    location / {
+        proxy_pass http://127.0.0.1:9201;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_read_timeout 300s;   # an LLM turn can take minutes on the iGPU
+    }
+}
+
 server {
     listen 10.42.0.1:80;
     listen 192.168.1.104:80;