feat: add Kiro (AWS Agentic IDE) as a 5th provider via ACP

package.json

@@ -30,6 +30,7 @@
     "server:dev": "tsx --tsconfig server/tsconfig.json server/index.js",
     "server:dev-watch": "tsx watch --tsconfig server/tsconfig.json server/index.js",
     "client": "vite",
+    "test:server": "tsx --tsconfig server/tsconfig.json --test \"server/**/*.test.ts\"",
     "build": "npm run build:client && npm run build:server",
     "build:client": "vite build",
     "prebuild:server": "node -e \"require('node:fs').rmSync('dist-server', { recursive: true, force: true })\"",

public/api-docs.html

@@ -834,6 +834,7 @@ <h4>Branch & PR Response</h4>
             { id: 'gemini',   name: 'Google' },
             { id: 'cursor',   name: 'Cursor' },
             { id: 'opencode', name: 'OpenCode' },
+            { id: 'kiro',     name: 'AWS Kiro' },
         ];
 
         async function populateModels() {

server/index.js

@@ -41,6 +41,10 @@ import {
     spawnOpenCode,
     abortOpenCodeSession,
 } from './opencode-cli.js';
+import {
+    spawnKiro,
+    abortKiroSession,
+} from './kiro-cli.js';
 import sessionManager from './sessionManager.js';
 import {
     stripAnsiSequences,
@@ -100,13 +104,15 @@ const wss = createWebSocketServer(server, {
             codex: queryCodex,
             gemini: spawnGemini,
             opencode: spawnOpenCode,
+            kiro: spawnKiro,
         },
         abortFns: {
             claude: abortClaudeSDKSession,
             cursor: abortCursorSession,
             codex: abortCodexSession,
             gemini: abortGeminiSession,
             opencode: abortOpenCodeSession,
+            kiro: abortKiroSession,
         },
         resolveToolApproval,
         getPendingApprovalsForSession,
@@ -1224,6 +1230,20 @@ app.get('/api/projects/:projectId/sessions/:sessionId/token-usage', authenticate
             });
         }
 
+        // Kiro sessions report `context_usage_percentage` per turn but not a
+        // running total/used pair compatible with this endpoint. Defer accurate
+        // accounting to a follow-up; the UI will treat Kiro as "no budget" for
+        // now (parity with Cursor/Gemini).
+        if (provider === 'kiro') {
+            return res.json({
+                used: 0,
+                total: 0,
+                breakdown: { input: 0, cacheCreation: 0, cacheRead: 0 },
+                unsupported: true,
+                message: 'Token usage tracking not available for Kiro sessions'
+            });
+        }
+
         if (provider === 'opencode') {
             const dbPath = getOpenCodeDatabasePath();
             if (!fs.existsSync(dbPath)) {