refactor(issue): unify solution ID format to SOL-{issue-id}-{seq}

- Update solution-schema.json pattern to support new format
- Add Solution ID Format specification to plan.md
- Fix JSON parsing with extractJsonFromMarkdown + try-catch
- Update all examples in agent and prompt files:
  - issue-plan-agent.md
  - issue-queue-agent.md
  - issue-execute.md
  - issue-queue.md
  - queue.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/agents/issue-plan-agent.md

@@ -241,13 +241,13 @@ OUTPUT FORMAT:
   "conflicts": [{
     "type": "file_conflict|api_conflict|data_conflict|dependency_conflict|architecture_conflict",
     "severity": "high|medium|low",
-    "solutions_affected": ["SOL-001", "SOL-002"],
+    "solutions_affected": ["SOL-GH-123-1", "SOL-GH-123-2"],
     "summary": "brief description",
     "resolution_strategy": "sequential|parallel_with_coordination|refactor_merge",
-    "recommended_order": ["SOL-001", "SOL-002"],
+    "recommended_order": ["SOL-GH-123-1", "SOL-GH-123-2"],
     "rationale": "why this order"
   }],
-  "safe_parallel": [["SOL-003", "SOL-004"]]
+  "safe_parallel": [["SOL-GH-124-1", "SOL-GH-125-1"]]
 }
 `;
 
@@ -287,15 +287,15 @@ Each line is a solution JSON containing tasks. Schema: `cat .claude/workflows/cl
 ```json
 {
   "bound": [{ "issue_id": "...", "solution_id": "...", "task_count": N }],
-  "pending_selection": [{ "issue_id": "...", "solutions": [{ "id": "SOL-001", "description": "...", "task_count": N }] }],
+  "pending_selection": [{ "issue_id": "GH-123", "solutions": [{ "id": "SOL-GH-123-1", "description": "...", "task_count": N }] }],
   "conflicts": [{
     "type": "file_conflict|api_conflict|data_conflict|dependency_conflict|architecture_conflict",
     "severity": "high|medium|low",
-    "solutions_affected": ["SOL-001", "SOL-002"],
+    "solutions_affected": ["SOL-GH-123-1", "SOL-GH-123-2"],
     "summary": "brief description",
     "resolution_strategy": "sequential|parallel_with_coordination",
-    "recommended_order": ["SOL-001", "SOL-002"],
-    "recommended_resolution": "Use sequential execution: SOL-001 first",
+    "recommended_order": ["SOL-GH-123-1", "SOL-GH-123-2"],
+    "recommended_resolution": "Use sequential execution: SOL-GH-123-1 first",
     "resolution_options": [{ "strategy": "...", "rationale": "..." }]
   }]
 }

.claude/agents/issue-queue-agent.md

@@ -37,7 +37,7 @@ color: orange
 {
   solutions: [{
     issue_id: string,      // e.g., "ISS-20251227-001"
-    solution_id: string,   // e.g., "SOL-20251227-001"
+    solution_id: string,   // e.g., "SOL-ISS-20251227-001-1"
     task_count: number,    // Number of tasks in this solution
     files_touched: string[], // All files modified by this solution
     priority: string       // Issue priority: critical | high | medium | low
@@ -247,7 +247,7 @@ Queue Item ID format: `S-N` (S-1, S-2, S-3, ...)
     {
       "item_id": "S-1",
       "issue_id": "ISS-20251227-003",
-      "solution_id": "SOL-20251227-003",
+      "solution_id": "SOL-ISS-20251227-003-1",
       "status": "pending",
       "execution_order": 1,
       "execution_group": "P1",

.claude/commands/issue/plan.md

@@ -214,6 +214,8 @@ ${issueList}
 ### Generate Files
 \`.workflow/issues/solutions/{issue-id}.jsonl\` - Solution with tasks (schema: cat .claude/workflows/cli-templates/schemas/solution-schema.json)
 
+**Solution ID Format**: \`SOL-{issue-id}-{seq}\` (e.g., \`SOL-GH-123-1\`, \`SOL-ISS-20251229-1\`)
+
 ### Binding Rules
 - **Single solution**: Auto-bind via \`ccw issue bind <id> --solution <file>\`
 - **Multiple solutions**: Register only, return for user selection
@@ -254,7 +256,17 @@ for (let i = 0; i < agentTasks.length; i += MAX_PARALLEL) {
   // Collect results from this chunk
   for (const { taskId, batchIndex } of taskIds) {
     const result = TaskOutput(task_id=taskId, block=true);
-    const summary = JSON.parse(result);
+
+    // Extract JSON from potential markdown code blocks (agent may wrap in ```json...```)
+    const jsonText = extractJsonFromMarkdown(result);
+    let summary;
+    try {
+      summary = JSON.parse(jsonText);
+    } catch (e) {
+      console.log(`⚠ Batch ${batchIndex + 1}: Failed to parse agent result, skipping`);
+      updateTodo(`Plan batch ${batchIndex + 1}`, 'completed');
+      continue;
+    }
     agentResults.push(summary);  // Store for Phase 3 conflict aggregation
 
     for (const item of summary.bound || []) {

.claude/commands/issue/queue.md

@@ -89,7 +89,7 @@ Queue formation command using **issue-queue-agent** that analyzes all bound solu
     {
       "item_id": "S-1",
       "issue_id": "ISS-20251227-003",
-      "solution_id": "SOL-20251227-003",
+      "solution_id": "SOL-ISS-20251227-003-1",
       "status": "pending",
       "execution_order": 1,
       "execution_group": "P1",
@@ -102,7 +102,7 @@ Queue formation command using **issue-queue-agent** that analyzes all bound solu
     {
       "item_id": "S-2",
       "issue_id": "ISS-20251227-001",
-      "solution_id": "SOL-20251227-001",
+      "solution_id": "SOL-ISS-20251227-001-1",
       "status": "pending",
       "execution_order": 2,
       "execution_group": "P1",
@@ -115,7 +115,7 @@ Queue formation command using **issue-queue-agent** that analyzes all bound solu
     {
       "item_id": "S-3",
       "issue_id": "ISS-20251227-002",
-      "solution_id": "SOL-20251227-002",
+      "solution_id": "SOL-ISS-20251227-002-1",
       "status": "pending",
       "execution_order": 3,
       "execution_group": "S2",

.claude/workflows/cli-templates/schemas/solution-schema.json

@@ -7,8 +7,9 @@
   "properties": {
     "id": {
       "type": "string",
-      "description": "Unique solution identifier",
-      "pattern": "^SOL-[0-9]+$"
+      "description": "Unique solution identifier: SOL-{issue-id}-{seq}",
+      "pattern": "^SOL-.+-[0-9]+$",
+      "examples": ["SOL-GH-123-1", "SOL-ISS-20251229-1"]
     },
     "description": {
       "type": "string",