feat: add plan and review workflow skills

.config/opencode/skills/requesting-code-review/reviewer.md

@@ -0,0 +1,49 @@
+---
+title: reviewer-request-template
+type: note
+permalink: opencode-config/skills/requesting-code-review/reviewer-template
+---
+
+# Reviewer Request Template
+
+Use this when dispatching the `reviewer` agent.
+
+## What Was Implemented
+
+<what-was-implemented>
+
+## Requirements / Plan
+
+- Plan note: `plans/<note-name>`
+- Requirements summary:
+  - <requirement-1>
+  - <requirement-2>
+
+## Summary
+
+<brief summary of behavior/design choices>
+
+## Diff Context
+
+- Base: <base-sha>
+- Head: <head-sha>
+- Range: `<base-sha>..<head-sha>`
+- Key files:
+  - <path-1>
+  - <path-2>
+
+```bash
+git diff --stat <base-sha>..<head-sha>
+git diff <base-sha>..<head-sha>
+```
+
+## Reviewer Output Requested
+
+1. Strengths
+2. Issues by severity:
+   - Critical (must fix)
+   - Important (should fix before merge)
+   - Minor (nice to have)
+3. Merge readiness verdict with short reasoning
+
+For each issue include file:line, why it matters, and suggested fix.