diff --git a/agent-zero-openrouter-key.prose.md b/agent-zero-openrouter-key.prose.md
index 77eb514..8cf9b28 100644
--- a/agent-zero-openrouter-key.prose.md
+++ b/agent-zero-openrouter-key.prose.md
@@ -54,7 +54,7 @@ description: >
    ```
 
 4. **Return status**
-   - If all checks pass: `{ key_status: "valid", key_prefix: "«vault: agents/production OPENROUTER_API_KEY»", user_id: "user_2rt9lCqcd5d7Vk1t18DHsvWdPTT" }`
+   - If all checks pass: `{ key_status: "valid", key_prefix: "sk-or-v1-synthetic...", user_id: "user_2rt9lCqcd5d7Vk1t18DHsvWdPTT" }`
    - If OpenRouter returns 401: `{ key_status: "invalid", detail: "User not found" }`
    - If vault secret is missing: `{ vault_synced: false }`
 
@@ -90,7 +90,7 @@ description: >
 | Field | Value |
 |-------|-------|
 | **Key Prefix** | `«vault: agents/production OPENROUTER_API_KEY»` |
-| **Full Key** | `«redacted:«vault: agents/production OPENROUTER_API_KEY»»` (in vault + /a0/usr/.env) |
+| **Full Key** | `«vault: agents/production OPENROUTER_API_KEY»` (in vault + /a0/usr/.env) |
 | **OpenRouter User** | `user_2rt9lCqcd5d7Vk1t18DHsvWdPTT` |
 | **Free Tier** | No |
 | **Monthly Usage** | 0 (as of 2026-09-01) |
diff --git a/hermes-key-enforcement.prose.md b/hermes-key-enforcement.prose.md
index d2320d0..7c767a2 100644
--- a/hermes-key-enforcement.prose.md
+++ b/hermes-key-enforcement.prose.md
@@ -101,7 +101,7 @@ auxiliary:
 fallback_providers:
   - provider: deepseek
     base_url: https://api.deepseek.com
-    api_key: «vault: external/production LITELLM_API_KEY»   # ← hardcoded OK (external)
+    api_key: sk-synthetic-external-example   # ← hardcoded OK (external, synthetic example)
     api_key_env: DEEPSEEK_API_KEY      # ← also OK if set in environment (vault or /etc/environment)
 ```
 
@@ -182,7 +182,7 @@ grep -rn 'litellm/v1/responses' /root/.hermes/config.yaml
 
 # 2. Check systemd drop-ins for master key leaks (2026-07-05: Tanko had this)
 grep -rn 'LITELLM_API_KEY' /root/.config/systemd/user/ 2>/dev/null
-grep -rn 'LITELLM_API_KEY=sk-litellm-7f96080d' /root/.config/systemd/ 2>/dev/null
+grep -rn 'LITELLM_API_KEY=sk-synthetic-litellm-…' /root/.config/systemd/ 2>/dev/null
 
 # 3. Verify running process env matches dedicated key
 cat /proc/$(cat /home/jerome/.hermes/gateway.pid | python3 -c "import sys,json; print(json.load(sys.stdin)['pid'])")/environ \
diff --git a/litellm-api-keys.prose.md b/litellm-api-keys.prose.md
index 0f7fb22..9c35f0f 100644
--- a/litellm-api-keys.prose.md
+++ b/litellm-api-keys.prose.md
@@ -191,7 +191,7 @@ through its agent wrapper.
 ### Tanko migration (COMPLETED 2026-07-17)
 
 Tanko was the last agent migrated from hardcoded keys to vault wrapper.
-Previously: key hardcoded in `/home/jerome/.hermes/config.yaml` (`api_key: sk-CggiHWlamQy…`)
+Previously: key hardcoded in `/home/jerome/.hermes/config.yaml` (`api_key: sk-synthetic-tanko-example…`)
 and `zulip-env.conf` systemd drop-in. Now: user-scope systemd service with drop-in
 `50-vault-wrapper.conf`, `infisical-gateway.sh` wrapper with while-true loop, token at
 `~/.infisical-token`, `.env` fallback at `~/.hermes/.env`. Keys injected live from vault.
@@ -277,7 +277,7 @@ UI bootstrap, model selection) is built around OpenRouter's native authenticatio
   (unlike fleet agents which require vault injection)
 
 **Current Key (2026-09-01):**
-- **Prefix**: `«vault: agents/production OPENROUTER_API_KEY»`…`
+- **Prefix**: `«vault: agents/production OPENROUTER_API_KEY»`
 - **User**: `user_2rt9lCqcd5d7Vk1t18DHsvWdPTT`
 - **Plan**: Paid (not free tier)
 - **Usage**: 0 (as of 2026-09-01)
diff --git a/scripts/agent-health-check.py b/scripts/agent-health-check.py
index 62b1f06..8f8502a 100755
--- a/scripts/agent-health-check.py
+++ b/scripts/agent-health-check.py
@@ -129,6 +129,8 @@ if not INFISICAL_TOKEN:
         try:
             with open(_token_path) as _f:
                 INFISICAL_TOKEN = _f.read().strip()
+        except (OSError, UnicodeDecodeError):
+            pass
 INFISICAL_API_URL = os.environ.get("INFISICAL_API_URL", "https://vault.sysloggh.net")
 
 # ── Helpers ──────────────────────────────────────────────────────────