fix(ext): !stop CancelCascadeInvocation RPC — AG 빨간■ 동일 메커니즘 적용 #task-411

.agents/references/known-issues.md

@@ -43,12 +43,10 @@
 ### [2026-03-11] rejectAgentStep — AG 미등록 VS Code 커맨드
 - **증상**: `/stop` 및 거부 시 `antigravity.agent.rejectAgentStep` → `command not found`
 - **원인**: AG IDE가 이 커맨드를 런타임에 등록하지 않음 (상수 정의만 존재)
-- **해결** (2026-03-18): `command-handler.ts`의 `!stop` 핸들러를 `sdk.cascade.cancelCurrentTask()`로 교체.
-  WS 경로는 이미 SDK 사용 중이었으므로 file-based 경로만 수정.
-  - `CancelCascadeInvocation` gRPC 메서드도 사용 가능 (cascade_id 필요)
-  - **E2E 검증 필요** — AG 가동 중 `!stop` 명령 테스트
-- **주의**: `sdk.cascade.rejectStep()`은 여전히 내부적으로 `rejectAgentStep` 커맨드를 호출할 수 있음.
-  단일 step 거부보다 `cancelCurrentTask()`(전체 중단)가 더 안정적.
+- **해결** (2026-03-18): `_cancelCurrentCascade()` 헬퍼 추가 — `sdk.titles.getActiveCascadeId()` → `ls.cancelCascade(cascadeId)` (CancelCascadeInvocation RPC).
+  AG의 빨간색 ■ 버튼과 동일한 메커니즘. rawRPC fallback 포함.
+  - ~~`sdk.cascade.cancelCurrentTask()` — SDK에 존재하지 않는 메서드, 무시됨~~
+- **주의**: `getActiveCascadeId()`가 null이면 취소 불가 — 로그로 확인 필요
 - **Vikunja**: #411
 
 ---

docs/devlog/2026-03-18.md

@@ -4,4 +4,5 @@
 |---|------|------|------|------|
 | 001 | 06:09~06:26 | known-issues 정리/아카이빙 + Collector 폐기 마킹 + 문서 보강 (architecture, tech-stack, conventions) | `881a424` | ✅ |
 | 002 | 06:33~06:50 | Hub/WS 단위 테스트 45개 작성 (연결 관리, pending_owners, 라우팅, 인증) | `ac803d4` | ✅ |
-| 003 | 06:50~07:00 | rejectAgentStep 대안 조사 — CancelCascadeInvocation RPC 발견 | `bcca706` | 🔧 |
+| 003 | 06:50~07:05 | !stop 핸들러 SDK cancelCurrentTask() 교체 + VSIX 재빌드/설치 | `759dab5` | ✅ |
+| 004 | 07:03~07:15 | !stop 재수정 — cancelCurrentTask→CancelCascadeInvocation RPC (AG 빨간■ 동일) + VSIX 설치 | `8d5940b` | ✅ |

extension/out/extension.js

@@ -435,7 +435,7 @@ async function activate(context) {
             onCommand: (data) => {
                 logToFile(`[WS-CMD] ${data.text?.substring(0, 50)}`);
                 (0, command_handler_1.handleWSCommand)({
-                    bridgePath, projectName, sdk, autoApproveEnabled, logToFile,
+                    bridgePath, projectName, sdk, ls: sdk?.ls, autoApproveEnabled, logToFile,
                     onAutoApproveChanged: (enabled) => { autoApproveEnabled = enabled; },
                     recentDiscordSentTexts,
                 }, data);
@@ -558,7 +558,7 @@ async function activate(context) {
     }
     // Watch commands directory
     (0, command_handler_1.watchCommandsDir)({
-        bridgePath, projectName, sdk, autoApproveEnabled, logToFile,
+        bridgePath, projectName, sdk, ls: sdk?.ls, autoApproveEnabled, logToFile,
         onAutoApproveChanged: (enabled) => { autoApproveEnabled = enabled; },
         recentDiscordSentTexts,
     });

extension/src/command-handler.ts

@@ -17,6 +17,8 @@ export interface CommandHandlerContext {
     bridgePath: string;
     projectName: string;
     sdk: any;
+    /** LSBridge instance for direct LS RPC calls (cancelCascade, etc.) */
+    ls: any;
     autoApproveEnabled: boolean;
     logToFile: (msg: string) => void;
     /** Called when auto-approve is toggled; extension.ts updates its own state */
@@ -93,9 +95,7 @@ export function handleWSCommand(ctx: CommandHandlerContext, data: { text?: strin
 
     if (text === '!stop') {
         ctx.logToFile('[WS-CMD] !stop — cancelling AG task');
-        if (ctx.sdk) {
-            try { ctx.sdk.cascade.cancelCurrentTask(); } catch { }
-        }
+        _cancelCurrentCascade(ctx);
         return;
     }
 
@@ -122,6 +122,42 @@ export function handleWSCommand(ctx: CommandHandlerContext, data: { text?: strin
 
 // ─── Private ───
 
+/**
+ * Cancel the currently active cascade via CancelCascadeInvocation RPC.
+ * This is the same mechanism AG's native red ■ stop button uses.
+ */
+async function _cancelCurrentCascade(ctx: CommandHandlerContext) {
+    // 1. Get the active cascade ID from SDK titles manager
+    const cascadeId = ctx.sdk?.titles?.getActiveCascadeId?.();
+    if (!cascadeId) {
+        ctx.logToFile('[STOP] No active cascade to cancel (getActiveCascadeId returned null)');
+        return;
+    }
+
+    ctx.logToFile(`[STOP] Cancelling cascade: ${cascadeId.substring(0, 12)}...`);
+
+    // 2. Use LSBridge.cancelCascade() → CancelCascadeInvocation RPC
+    if (ctx.ls) {
+        try {
+            await ctx.ls.cancelCascade(cascadeId);
+            ctx.logToFile(`[STOP] ✅ CancelCascadeInvocation sent for ${cascadeId.substring(0, 12)}`);
+            return;
+        } catch (e: any) {
+            ctx.logToFile(`[STOP] LSBridge cancelCascade failed: ${e.message}`);
+        }
+    }
+
+    // 3. Fallback: try rawRPC directly via sdk.ls
+    if (ctx.sdk?.ls?.rawRPC) {
+        try {
+            await ctx.sdk.ls.rawRPC('CancelCascadeInvocation', { cascadeId });
+            ctx.logToFile(`[STOP] ✅ rawRPC CancelCascadeInvocation sent for ${cascadeId.substring(0, 12)}`);
+        } catch (e: any) {
+            ctx.logToFile(`[STOP] rawRPC fallback also failed: ${e.message}`);
+        }
+    }
+}
+
 function _processCommandFile(filePath: string, ctx: CommandHandlerContext) {
     try {
         const content = fs.readFileSync(filePath, 'utf-8');
@@ -158,15 +194,8 @@ function _processCommandFile(filePath: string, ctx: CommandHandlerContext) {
                 console.log(`Gravity Bridge: approve_terminal error: ${e.message}`)
             );
         } else if (text === '!stop') {
-            // Cancel current operation — use SDK (rejectAgentStep is NOT a registered VS Code command)
-            if (ctx.sdk) {
-                try {
-                    ctx.sdk.cascade.cancelCurrentTask();
-                    console.log('Gravity Bridge: ✅ stop sent via SDK');
-                } catch (e: any) {
-                    console.log(`Gravity Bridge: stop error: ${e.message}`);
-                }
-            }
+            // Cancel current operation — use CancelCascadeInvocation RPC (same as AG's red ■ button)
+            _cancelCurrentCascade(ctx);
         } else if (text.startsWith('!auto')) {
             // Auto-approve mode toggle
             let enabled: boolean;

extension/src/extension.ts

@@ -366,6 +366,7 @@ let sawRunningAfterPending = true;
 // ─── Step Probe, Response Watcher, Approval Strategies → extracted to ./step-probe.ts ───
 
 
+
 export async function activate(context: vscode.ExtensionContext) {
     console.log('Gravity Bridge: activating...');
 
@@ -426,7 +427,7 @@ export async function activate(context: vscode.ExtensionContext) {
             onCommand: (data: WSCommandData) => {
                 logToFile(`[WS-CMD] ${data.text?.substring(0, 50)}`);
                 handleWSCommand({
-                handleWSCommand({
+                    bridgePath, projectName, sdk, ls: sdk?.ls, autoApproveEnabled, logToFile,
                     onAutoApproveChanged: (enabled: boolean) => { autoApproveEnabled = enabled; },
                     recentDiscordSentTexts,
                 }, data);
@@ -555,7 +556,7 @@ export async function activate(context: vscode.ExtensionContext) {
 
     // Watch commands directory
     watchCommandsDir({
-    watchCommandsDir({
+        bridgePath, projectName, sdk, ls: sdk?.ls, autoApproveEnabled, logToFile,
         onAutoApproveChanged: (enabled: boolean) => { autoApproveEnabled = enabled; },
         recentDiscordSentTexts,
     });