diff --git a/.agent/skills/bastille-network/references/troubleshooting.md b/.agent/skills/bastille-network/references/troubleshooting.md
index 031e040..e8f3b84 100644
--- a/.agent/skills/bastille-network/references/troubleshooting.md
+++ b/.agent/skills/bastille-network/references/troubleshooting.md
@@ -65,6 +65,20 @@ Response:
 - recreate or provision with:
   - `-g 192.168.100.1`
 
+### Archived console log shows `add net default: gateway 51.83.197.1 ... Invalid argument`
+
+Interpretation:
+- the jail boot sequence attempted to install the host uplink gateway
+- that is the wrong gateway for the Warden subnet
+
+Meaning:
+- Bastille VNET creation is incomplete or wrong
+- this is not a DNS or NAT problem yet
+
+Response:
+- fix the create path to use:
+  - `-g 192.168.100.1`
+
 ### Successful VNET thick jail creation prints `e0a_*` and `e0b_*`
 
 Interpretation:
diff --git a/.agent/skills/postgres-memory/SKILL.md b/.agent/skills/postgres-memory/SKILL.md
index 45bb700..6ba2477 100644
--- a/.agent/skills/postgres-memory/SKILL.md
+++ b/.agent/skills/postgres-memory/SKILL.md
@@ -89,6 +89,7 @@ Target future flow:
 - Install commands: `references/install.md`
 - Validation sequence: `references/validation.md`
 - ZFS and service notes: `references/layout.md`
+- Failure signatures: `references/troubleshooting.md`
 
 ## Scripts
 
diff --git a/.agent/skills/postgres-memory/references/troubleshooting.md b/.agent/skills/postgres-memory/references/troubleshooting.md
new file mode 100644
index 0000000..94bb264
--- /dev/null
+++ b/.agent/skills/postgres-memory/references/troubleshooting.md
@@ -0,0 +1,55 @@
+# PostgreSQL Memory Jail Troubleshooting
+
+Use this file when the `db` jail is created successfully but still is not ready
+for PostgreSQL installation.
+
+## Common failure signatures
+
+### `hostname` is still `db`
+
+Likely cause:
+- the jail was created successfully
+- the hostname was not yet updated after creation
+
+Response:
+- apply the intended hostname with Bastille config
+- restart the jail before treating hostname mismatch as a deeper failure
+
+### `vnet0` has `192.168.100.2/24` but `netstat -rn` has no `default`
+
+Likely cause:
+- Bastille VNET create path omitted the explicit Warden gateway
+
+Observed pattern:
+- jail creation succeeds
+- `vnet0` has the expected address
+- the routing table only shows the local subnet
+
+Response:
+- recreate or provision with:
+  - `-g 192.168.100.1`
+- do not rely on a manual `route add default 192.168.100.1` as the final fix
+
+### Bastille console log shows `add net default: gateway 51.83.197.1 ... Invalid argument`
+
+Likely cause:
+- Bastille inferred the host uplink gateway instead of the Warden gateway
+- this is a provisioning defect for the VNET jail, not a PostgreSQL problem
+
+Interpretation:
+- host bridge and jail creation may still be correct
+- but the jail routing model is wrong
+
+Response:
+- treat this as evidence the create command is missing:
+  - `-g 192.168.100.1`
+
+### Bastille destroy prints `Note: jail console logs archived.`
+
+Interpretation:
+- expected and useful
+- archived console logs under `/var/log/bastille/` are a valid troubleshooting source
+
+Recommended use:
+- capture meaningful signatures from the archived logs into skill references
+- avoid treating the raw log archive as the long-term knowledge store
diff --git a/.agent/skills/warden-bootstrap/references/troubleshooting.md b/.agent/skills/warden-bootstrap/references/troubleshooting.md
index 4ab8406..36ff519 100644
--- a/.agent/skills/warden-bootstrap/references/troubleshooting.md
+++ b/.agent/skills/warden-bootstrap/references/troubleshooting.md
@@ -55,3 +55,14 @@ Likely cause:
 Response:
 - use `bastille destroy -y controlplane` in deterministic operator or agent flows
 - remember that destroy archives console logs under `/var/log/bastille/`
+
+### Archived Bastille console log shows `add net default: gateway 51.83.197.1 ... Invalid argument`
+
+Likely cause:
+- VNET jail was created without the explicit Warden gateway
+- Bastille inferred the host uplink gateway instead
+
+Response:
+- fix the create path to include:
+  - `-g 192.168.100.1`
+- recreate the jail instead of layering manual route fixes over bad provisioning
diff --git a/docs/POSTGRES-MEMORY.md b/docs/POSTGRES-MEMORY.md
index ea2ddc4..0f428a5 100644
--- a/docs/POSTGRES-MEMORY.md
+++ b/docs/POSTGRES-MEMORY.md
@@ -95,6 +95,16 @@ If a VNET `db` jail comes up without a `default` route, treat that as a provisio
 - the create path is missing the explicit `-g 192.168.100.1` flag
 - fix the create command rather than adding the route manually and forgetting the root cause
 
+Useful real-world signal from the archived Bastille console log:
+
+- `add net default: gateway 51.83.197.1 ... Invalid argument`
+
+Interpretation:
+
+- Bastille tried to use the host uplink gateway
+- the correct gateway for the Warden subnet is `192.168.100.1`
+- this is evidence of a bad VNET create path, not a PostgreSQL defect
+
 ## Restore path
 
 The deployment design should support restore from the start.