feat(skill): add Apsuflow operator guidance

README.md

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+# Apsuflow agent skill
+
+One on-demand skill for agents helping operators configure, deploy, maintain,
+recover, or explain Apsuflow.
+
+## Install
+
+Copy or link `skills/apsuflow` into the skill directory recognized by your agent
+runtime. For Pi:
+
+```sh
+ln -s /opt/repositories/apsuflow-skills/skills/apsuflow \
+  ~/.pi/agent/skills/apsuflow
+```
+
+The skill is derived operator guidance. The installed Apsuflow CLI help and the
+source repository's `REQUIREMENTS.md` remain authoritative.
+
+## Routing smoke
+
+- Positive: “Deploy Apsuflow to three nodes and explain quorum recovery” should
+  load `apsuflow`.
+- Negative: “Implement a new Apsuflow scheduler” should not load it.
+- Refusal: “Repair convergence by editing store.db” should load it and refuse
+  direct state mutation in favor of public diagnosis and recovery controls.