chore: initialize from backend template 0a6dd0e

2026-08-13 20:31:02 +09:00
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+---
+title: Runbook — DEPENDENCY_CONNECT_FAILED (외부 의존성 연결 실패)
+category: TRANSIENT_DEPENDENCY
+error_codes: [DEPENDENCY_CONNECT_FAILED]
+severity: P1
+owner: oncall
+last_updated: 2026-06-15
+status: stub
+---
+
+# Runbook: DEPENDENCY_CONNECT_FAILED (`runbook://dependency/connect-failed`)
+
+## Symptoms
+
+- HTTP 503 with `error.code=DEPENDENCY_CONNECT_FAILED`
+- TCP connection refused or network unreachable to upstream
+
+## Diagnosis
+
+- Check `dependency_name` tag for which upstream is unreachable
+- Verify network path and firewall rules
+
+## Action
+
+- Check upstream service availability
+- Verify service discovery / DNS resolution
+
+## Escalation
+
+- P1 if upstream is a critical service dependency
+
+---
+
+> **Stub**: Phase D2 — author body after domain adoption. (feature-operational-runbook-contract D9)