## What changed

<!-- Describe what files were added, modified, or removed and why. -->

## Type of change

- [ ] New specialization (new spec directory)
- [ ] New skill, rule, workflow, or prompt
- [ ] Improvement to existing content (accuracy, completeness, examples)
- [ ] Agent role definition update
- [ ] Template or structural change
- [ ] Bug fix (incorrect or outdated content)
- [ ] Documentation (README, CONTRIBUTING, etc.)

## How to test

<!-- Describe how you validated this change in a real agent session. -->

**Agent tool:** <!-- opencode / Claude Code / Cursor / etc. -->
**Model:** <!-- claude-sonnet / gpt-4o / etc. -->
**Workflow or command tested:** <!-- /develop-feature / /upgrade-cluster / etc. -->
**Outcome:**

## Checklist

- [ ] All `AGENT INSTRUCTIONS` comment blocks removed
- [ ] All `{{PLACEHOLDER}}` values filled with real content
- [ ] Code examples are real and runnable — no placeholder values
- [ ] Parent area's `AGENTS.md` spec map updated (if new spec added)
- [ ] Spec tested in a real agent session with at least one workflow
- [ ] File length within template guidelines (rules ≤ 150 lines, skills 150–350, workflows 60–200)
- [ ] EN + RU blocks present and semantically identical in all prompt files
