container/skills/pia-vpn/SKILL.md

@@ -9,8 +9,10 @@ Bring this container's traffic out through Private Internet Access over
 WireGuard, using the API PIA documents for headless use.
 
 Run `sudo ~/.claude/skills/pia-vpn/pia-wg.sh` with `up`, `up --full`, `down` or
-`status`. Read the rest of this page before the first `up --full` — two of the
+`status`. Read the rest of this page before the first `up --full` — three of the
-behaviours below are actively misleading if you meet them without warning.
+behaviours below are actively misleading if you meet them without warning, and
+each one presents as "the VPN is fine" or "Claude is broken" rather than as
+what it is.
 
 ## Before anything else: what the toggle does not do
 
@@ -72,7 +74,27 @@ that way looks perfect and works for nothing.
 `status` resolves a real name for this reason. Trust its `DNS:` line, and if
 you check by hand, resolve a name rather than fetching an address.
 
-## Trap 3: no tunnel survives a restart, and it fails open
+## Trap 3: in test mode, the obvious probe is the one thing tunnelled
+
+`up` routes `1.1.1.1` and nothing else. So checking your address by fetching
+`https://1.1.1.1/cdn-cgi/trace` reports a **PIA** address — not because your
+traffic is going through PIA, but because that single probe is. Everything else
+still leaves directly.
+
+This reads exactly like a working full tunnel, and it is the likeliest reason
+someone concludes the VPN is on when it is not. `status` prints both exits in
+test mode for this reason:
+
+```
+mode: test route only (1.1.1.1 through the tunnel, nothing else)
+  through the tunnel: 64.113.5.73
+  everything else:    172.116.197.166   <- your real address
+```
+
+Two different addresses there is correct and expected in test mode. If you want
+the second line to change, you want `up --full`.
+
+## Trap 4: no tunnel survives a restart, and it fails open
 
 The network namespace is rebuilt every time the container starts, and nothing
 inside reconnects anything. After a stop/start, Reset or any config change that
@@ -115,18 +137,22 @@ curl -s https://serverlist.piaservers.net/vpninfo/servers/v6 \
 
 ## Verifying
 
-`status` prints three things — handshake, DNS, and the public address:
+`status` prints the handshake, DNS, and which address traffic actually leaves
+from — labelled by mode, so the answer cannot be misread:
 
 ```
   latest handshake: 2 seconds ago
   transfer: 92 B received, 180 B sent
 DNS: ok (via 10.0.0.243 10.0.0.242)
-public IP: 64.113.5.244
+mode: full tunnel
+  all traffic exits: 64.113.5.244
 ```
 
-All three matter. A handshake with `DNS: BROKEN` is trap 1. A handshake with an
+All of it matters. A handshake with `DNS: BROKEN` is trap 1. `mode: test route
-unchanged public address means routing did not take — you are probably in `up`
+only` with two different addresses is trap 3, and is correct — it means the
-rather than `up --full`.
+tunnel works and you have not asked for it to carry anything yet. Report the
+mode line when telling someone the VPN is on; "the public IP is a PIA one" is
+true in test mode too, and means much less than it sounds like.
 
 ## Tearing down
 

container/skills/pia-vpn/pia-wg.sh

@@ -156,8 +156,17 @@ down() {
   echo "tunnel down"
 }
 
+# Both are Cloudflare and both answer /cdn-cgi/trace over their bare address, so
+# neither needs DNS. Only 1.1.1.1 is ever routed into the tunnel, which is what
+# lets status tell the two exits apart.
+TRACE_TUNNELLED=https://1.1.1.1/cdn-cgi/trace
+TRACE_DIRECT=https://1.0.0.1/cdn-cgi/trace
+
+exit_ip() { curl -s -m 20 "$1" | sed -n 's/^ip=//p'; }
+
 status() {
   wg show "$IFACE" 2>/dev/null | grep -E "latest handshake|transfer" || echo "no tunnel up"
+
   # Resolve a name, not an IP literal. A curl to 1.1.1.1 succeeds while DNS is
   # completely broken, which is exactly how a dead resolver goes unnoticed.
   printf 'DNS: '
@@ -166,8 +175,22 @@ status() {
   else
     echo "BROKEN - cannot resolve api.anthropic.com"
   fi
-  echo -n "public IP: "
+
-  curl -s -m 20 https://1.1.1.1/cdn-cgi/trace | sed -n 's/^ip=//p'
+  # Report the exit per mode. In test mode the probe address is itself the one
+  # thing inside the tunnel, so a single "public IP" line would print a PIA
+  # address while every other packet leaves directly -- the exact reading that
+  # makes a test tunnel look like a full one.
+  if ip route show 0.0.0.0/1 2>/dev/null | grep -q "$IFACE"; then
+    echo "mode: full tunnel"
+    echo "  all traffic exits: $(exit_ip "$TRACE_TUNNELLED")"
+  elif ip link show "$IFACE" >/dev/null 2>&1; then
+    echo "mode: test route only (1.1.1.1 through the tunnel, nothing else)"
+    echo "  through the tunnel: $(exit_ip "$TRACE_TUNNELLED")"
+    echo "  everything else:    $(exit_ip "$TRACE_DIRECT")   <- your real address"
+  else
+    echo "mode: no tunnel"
+    echo "  all traffic exits: $(exit_ip "$TRACE_DIRECT")"
+  fi
 }
 
 case "${1:-}" in