feat: @uncaged/workflow-template-solve-issue — first workflow template

planner → coder → reviewer → committer flow with retry logic.
- createSolveIssueWorkflow factory (agent-agnostic)
- buildSolveIssueDescriptor with zod@4 JSON Schema
- Moderator: reviewer reject → coder retry, maxRounds → END
- 103 tests pass, biome clean

Closes #13
小橘 <xiaoju@shazhou.work>

packages/workflow-template-solve-issue/src/moderator.ts

@@ -0,0 +1,38 @@
+import type { Moderator } from "@uncaged/workflow";
+import { END } from "@uncaged/workflow";
+
+import type { SolveIssueMeta } from "./roles.js";
+
+export const solveIssueModerator: Moderator<SolveIssueMeta> = (ctx) => {
+  const maxRounds = ctx.start.meta.maxRounds;
+
+  if (ctx.steps.length === 0) {
+    return "planner";
+  }
+
+  const last = ctx.steps[ctx.steps.length - 1];
+
+  if (last.role === "planner") {
+    return "coder";
+  }
+
+  if (last.role === "coder") {
+    return "reviewer";
+  }
+
+  if (last.role === "reviewer") {
+    if (last.meta.approved === true) {
+      return "committer";
+    }
+    if (ctx.steps.length < maxRounds - 1) {
+      return "coder";
+    }
+    return END;
+  }
+
+  if (last.role === "committer") {
+    return END;
+  }
+
+  return END;
+};