feat: optimize exclusion filtering

app/findings.test.js

@@ -3,7 +3,7 @@ import assert from 'node:assert/strict';
 import fs from 'node:fs';
 import os from 'node:os';
 import path from 'node:path';
-import { loadOldFindings, loadExclusions, applyExclusions } from './findings.js';
+import { loadOldFindings, loadExclusions, applyExclusions, filterFalsePositivesWithAI } from './findings.js';
 import { EXCLUSIONS_PATH, FINDINGS_PATH } from './config.js';
 
 describe('findings exclusions', () => {
@@ -56,6 +56,50 @@ describe('findings exclusions', () => {
     assert.equal(filtered[0].location, 'README.md:12');
   });
 
+  it('dedupes repeated exclusions when loading exclusions', () => {
+    const fullPath = path.join(workspace, EXCLUSIONS_PATH);
+    fs.mkdirSync(path.dirname(fullPath), { recursive: true });
+    fs.writeFileSync(fullPath, JSON.stringify([
+      { location: 'entrypoint.sh:180', title: 'fetch_package_versions jq overhead' },
+      { location: 'entrypoint.sh:999', title: 'fetch_package_versions jq overhead' },
+      { location: 'entrypoint.sh:180', title: 'fetch_package_versions jq overhead' },
+    ], null, 2));
+
+    const exclusions = loadExclusions(workspace);
+
+    assert.equal(exclusions.length, 1);
+    assert.equal(exclusions[0].filePath, 'entrypoint.sh');
+    assert.equal(exclusions[0].text, 'fetch_package_versions jq overhead');
+  });
+
+  it('builds a compact exclusion hint for AI', async () => {
+    const findings = [
+      { level: 'warning', role: 'Maya', location: 'src/app.cs:12', suggestion: 'update tests' },
+    ];
+    const exclusions = [
+      { location: 'src/app.cs:1', original_finding: '更新套件後請補上測試驗證' },
+      { location: 'src/app.cs:99', original_finding: '更新套件後請補上測試驗證 ' },
+      { location: 'src/service.cs:3', original_finding: '更新套件後請補上測試驗證' },
+      { location: 'src/service.cs:8', title: '請確認安全性變更' },
+    ];
+
+    let capturedSystemPrompt = '';
+    let capturedUserContent = '';
+    const result = await filterFalsePositivesWithAI(findings, exclusions, async (systemPrompt, userContent) => {
+      capturedSystemPrompt = systemPrompt;
+      capturedUserContent = userContent;
+      return findings;
+    });
+
+    assert.equal(result.length, 1);
+    assert.ok(capturedSystemPrompt.includes('已知誤報清單（原始 4 筆，整理後 3 筆，分成 2 類）'));
+    assert.ok(capturedSystemPrompt.includes('更新套件後請補上測試驗證'));
+    assert.ok(capturedSystemPrompt.includes('paths=src/app.cs, src/service.cs'));
+    assert.ok(capturedSystemPrompt.includes('請確認安全性變更'));
+    assert.ok(capturedUserContent.includes('"location":"src/app.cs:12"'));
+    assert.ok(capturedUserContent.includes('"suggestion":"update tests"'));
+  });
+
   it('logs exclusions file metadata and repo state when loading exclusions', () => {
     const fullPath = path.join(workspace, EXCLUSIONS_PATH);
     fs.mkdirSync(path.dirname(fullPath), { recursive: true });