diff --git a/skills/sdlc/SKILL.md b/skills/sdlc/SKILL.md
index 8ceee5e..5a25586 100644
--- a/skills/sdlc/SKILL.md
+++ b/skills/sdlc/SKILL.md
@@ -140,6 +140,19 @@ Merge: Countess von Containerheim merges after all approvals
 13. Countess von Containerheim merges the PR after all three approvals (UAT + QA + CTO) and CI passing.
 14. Reject → returns to CTO → engineer.
 
+### Pipeline Routing
+
+PRs are classified into two pipelines based on changed files:
+
+| Pipeline | Trigger | Stages |
+|----------|---------|--------|
+| **A — User-facing** | PR changes any plugin runtime files (`src/`, `package.json`, `pnpm-lock.yaml`, `tsconfig.json`, `artifacthub-pkg.yml`) | CI → UAT → QA → CTO → CEO merge |
+| **B — Infrastructure** | PR changes ONLY infrastructure files (`.github/`, `*.md`, `.eslintrc*`, `.prettierrc*`, `renovate.json*`, `.gitignore`, `.editorconfig`, `LICENSE`) | CI → QA → CTO → CEO merge (skip UAT) |
+
+**Default is Pipeline A** — if any changed file does not match the infrastructure-only list, the full pipeline applies.
+
+Pipeline B requires **2 approving GitHub reviews** (QA + CTO) instead of 3. The `dual-approval-check` workflow enforces this gate.
+
 ### Hierarchy Rules
 
 - CTO rejections go directly to engineer (not through QA or UAT).