feat: Add impact analysis for component dependency tracking

- New tables: components, component_dependencies, component_files,
  verification_checks, change_impacts, impact_analysis_runs
- 8 new MCP tools: component_register, component_list,
  component_add_dependency, component_add_file, component_add_check,
  impact_analysis, impact_learn, component_graph
- Seed data: 17 components, 9 dependencies, 12 file patterns, 5 checks
- Historical impacts from session 397 issues recorded

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

src/index.ts

@@ -26,6 +26,16 @@ import { taskDelegations, taskDelegationQuery } from './tools/delegations.js';
 import { projectLock, projectUnlock, projectLockStatus, projectContext } from './tools/locks.js';
 import { versionAdd, versionList, versionShow, versionUpdate, versionRelease, versionAssignTask } from './tools/versions.js';
 import { taskCommitAdd, taskCommitRemove, taskCommitsList, taskLinkCommits, sessionTasks } from './tools/commits.js';
+import {
+  componentRegister,
+  componentList,
+  componentAddDependency,
+  componentAddFile,
+  componentAddCheck,
+  impactAnalysis,
+  impactLearn,
+  componentGraph,
+} from './tools/impact.js';
 
 // Create MCP server
 const server = new Server(
@@ -266,6 +276,50 @@ server.setRequestHandler(CallToolRequestSchema, async (request) => {
         });
         break;
 
+      // Impact Analysis
+      case 'component_register':
+        result = JSON.stringify(await componentRegister(a.id, a.name, a.type, {
+          path: a.path,
+          repo: a.repo,
+          description: a.description,
+          health_check: a.health_check,
+        }), null, 2);
+        break;
+      case 'component_list':
+        result = JSON.stringify(await componentList(a.type), null, 2);
+        break;
+      case 'component_add_dependency':
+        result = JSON.stringify(await componentAddDependency(
+          a.component_id,
+          a.depends_on,
+          a.dependency_type,
+          a.description
+        ), null, 2);
+        break;
+      case 'component_add_file':
+        result = JSON.stringify(await componentAddFile(a.component_id, a.file_pattern), null, 2);
+        break;
+      case 'component_add_check':
+        result = JSON.stringify(await componentAddCheck(a.component_id, a.name, a.check_type, a.check_command, {
+          expected_result: a.expected_result,
+          timeout_seconds: a.timeout_seconds,
+        }), null, 2);
+        break;
+      case 'impact_analysis':
+        result = JSON.stringify(await impactAnalysis(a.changed_files), null, 2);
+        break;
+      case 'impact_learn':
+        result = JSON.stringify(await impactLearn(
+          a.changed_component,
+          a.affected_component,
+          a.impact_description,
+          { error_id: a.error_id, task_id: a.task_id }
+        ), null, 2);
+        break;
+      case 'component_graph':
+        result = JSON.stringify(await componentGraph(a.component_id), null, 2);
+        break;
+
       default:
         throw new Error(`Unknown tool: ${name}`);
     }