fix(bridge): step structure discovery + approval watcher + AI text relay

- plannerResponse.response = user-facing text field (confirmed)
- step.runCommand.commandLine = command (not toolCall.argumentsJson)
- Add response watcher: bridge/response/ → ResolveOutstandingSteps RPC
- Fix AI text: use modifiedResponse/response, last-wins, dedup
- Fix flooding: slice(-delta) to skip old steps on reload
- Bot: 404 cache invalidation for deleted Discord channels

bot.py

@@ -579,7 +579,16 @@ class GravityBot(commands.Bot):
                                     color=discord.Color.purple(),
                                     timestamp=datetime.now(timezone.utc),
                                 )
-                                await channel.send(embed=embed)
+                                try:
+                                    await channel.send(embed=embed)
+                                except discord.NotFound:
+                                    # Channel was deleted — invalidate cache and retry once
+                                    logger.warning(f"Channel deleted for {project}, re-creating...")
+                                    self.project_channels.pop(project, None)
+                                    channel = await self._get_channel(project)
+                                    if channel:
+                                        await channel.send(embed=embed)
+                                    break
 
                     f.unlink()  # Cleanup
                 except (json.JSONDecodeError, OSError) as e:

docs/devlog/2026-03-08.md

@@ -3,3 +3,4 @@
 | # | 시간 | 작업 | 커밋 | 상태 |
 |---|------|------|------|------|
 | 1 | 01:00 | Extension↔Bot 프로토콜 불일치 3건 수정 + sql-wasm 번들링 | `e4dc1b1` | 🔧 |
+| 2 | 01:45~02:25 | Discord Bridge 디버깅: step 구조 파악, 승인 버튼, AI 텍스트 릴레이 | TBD | ✅ |

docs/devlog/entries/20260308-002.md

@@ -0,0 +1,47 @@
+# Discord Bridge — Step 구조 파악 및 3대 기능 수정
+
+- **시간**: 2026-03-08 01:45~02:25
+- **Commit**: TBD (이 파일과 함께 커밋)
+
+## 결정 사항
+
+### plannerResponse 구조 (확정)
+`GetCascadeTrajectorySteps` RPC가 반환하는 `PLANNER_RESPONSE` step의 실제 구조:
+```
+plannerResponse: {
+  response: "사용자 대면 텍스트",       ← 핵심 필드
+  modifiedResponse: "수정된 버전",
+  thinking: "내부 사고 (SKIP)",
+  thinkingSignature: "암호화 해시 (SKIP)",
+  messageId: "bot-xxx",
+  toolCalls: [{name, argumentsJson}],
+  thinkingDuration: "0.9s",
+  stopReason: "STOP_REASON_STOP_PATTERN"
+}
+```
+
+### RUN_COMMAND 구조 (확정)
+```
+step.runCommand: {
+  commandLine: "echo ...",           ← 핵심 필드
+  proposedCommandLine: "echo ...",
+  cwd: "c:\\Users\\...",
+  waitMsBeforeAsync: "10000",
+  blocking: true,
+  autoRunDecision: "AUTO_RUN_DECISION_DEFAULT_DENY"
+}
+```
+- `step.toolCall`은 존재하지 않음 — `step.runCommand`에 직접 필드
+
+### startStepIndex 무시 문제
+`GetCascadeTrajectorySteps({ startStepIndex })` — API가 파라미터를 무시하고 전체 step 반환.
+워크어라운드: `allSteps.slice(-e.delta)`로 마지막 N개만 처리.
+
+### 승인 RPC
+- `HandleCascadeUserInteraction` → `socket hang up` (실패)
+- `ResolveOutstandingSteps` → 성공 (폴백으로 사용)
+
+## 미완료
+- 승인 버튼 Discord→Extension→LS 경로: `HandleCascadeUserInteraction` 파라미터 정확히 확인 필요
+- AI 텍스트: 긴 응답(4000자+)의 Discord 분할 표시 테스트 안됨
+- 대화형 짧은 응답이 정상 전달되는지 최종 확인 필요

extension/out/extension.js

@@ -117,13 +117,6 @@ function writeChatSnapshot(text) {
         console.log(`Gravity Bridge: snapshot write error: ${e.message}`);
     }
 }
-function writePendingApproval(data) {
-    try {
-        const filePath = path.join(bridgePath, 'response', 'pending_approval.json');
-        fs.writeFileSync(filePath, JSON.stringify(data, null, 2), 'utf-8');
-    }
-    catch { }
-}
 // ─── Command File Watcher (Discord → Antigravity) ───
 function processCommandFile(filePath) {
     try {
@@ -227,6 +220,7 @@ async function initSDK(context) {
 }
 // Track last seen step per session to avoid re-fetching
 const lastSeenStep = new Map();
+const lastSnapshotText = new Map(); // dedup: last written text per session
 function setupMonitor() {
     if (!sdk) {
         return;
@@ -235,54 +229,67 @@ function setupMonitor() {
     sdk.monitor.onStepCountChanged(async (e) => {
         console.log(`Gravity Bridge: [SDK] step changed: "${e.title}" step ${e.newCount} (+${e.delta})`);
         try {
-            // Use the correct LS RPC: GetCascadeTrajectorySteps (not GetConversation which doesn't exist)
+            // IMPORTANT: Only fetch NEW steps, never re-fetch history
-            const fromStep = lastSeenStep.get(e.sessionId) ?? Math.max(0, e.newCount - e.delta);
+            const fromStep = Math.max(lastSeenStep.get(e.sessionId) ?? e.newCount - e.delta, e.newCount - e.delta);
             const stepsData = await sdk.ls.rawRPC('GetCascadeTrajectorySteps', {
-                cascadeId: e.sessionId,
+                cascadeId: e.sessionId, startStepIndex: fromStep
-                startStepIndex: fromStep
             });
             lastSeenStep.set(e.sessionId, e.newCount);
-            if (stepsData) {
+            if (stepsData && Array.isArray(stepsData.steps)) {
-                // Try to extract AI text from the steps response
+                // API may ignore startStepIndex — only process the last e.delta steps
-                const aiText = extractAIText(stepsData);
+                const allSteps = stepsData.steps;
-                if (aiText) {
+                const newSteps = allSteps.slice(-e.delta);
-                    const text = `🤖 **${e.title}**\n\n${aiText}`;
+                console.log(`Gravity Bridge: [SDK] processing ${newSteps.length} of ${allSteps.length} steps`);
-                    writeChatSnapshot(text);
+                let lastPlannerText = '';
-                    console.log(`Gravity Bridge: [SDK] relayed AI response (${aiText.length} chars)`);
+                for (const step of newSteps) {
-                    return;
+                    const sType = step.type || '';
+                    const sStatus = step.status || '';
+                    // ── RUN_COMMAND + WAITING → Pending Approval ──
+                    if (sType.includes('RUN_COMMAND') && sStatus.includes('WAITING')) {
+                        const rc = step.runCommand || {};
+                        const cmdLine = rc.commandLine || rc.proposedCommandLine || '';
+                        writePendingApproval({
+                            conversation_id: e.sessionId,
+                            command: cmdLine,
+                            description: `💻 ${e.title}\n\`\`\`\n${cmdLine}\n\`\`\`\ncwd: ${rc.cwd || ''}`,
+                        });
+                        console.log(`Gravity Bridge: [SDK] ⏳ pending: "${cmdLine.substring(0, 100)}"`);
+                        continue;
+                    }
+                    // ── PLANNER_RESPONSE → collect AI text (COMPLETED/DONE only) ──
+                    if (sType.includes('PLANNER_RESPONSE')) {
+                        if (!sStatus.includes('COMPLETED') && !sStatus.includes('DONE')) {
+                            continue;
+                        }
+                        const pr = step.plannerResponse;
+                        // Use confirmed field: plannerResponse.response or .modifiedResponse
+                        const responseText = pr?.modifiedResponse || pr?.response || '';
+                        if (responseText && typeof responseText === 'string' && responseText.length > 0) {
+                            lastPlannerText = responseText; // Overwrite — last one wins
+                            console.log(`Gravity Bridge: [SDK] 📝 planner response found (${responseText.length} chars)`);
+                        }
+                        continue;
+                    }
                 }
-                // Log the raw structure for debugging
+                // Write the LAST planner response as snapshot (with dedup)
-                console.log(`Gravity Bridge: [SDK] steps data keys: ${JSON.stringify(Object.keys(stepsData))}`);
+                if (lastPlannerText && lastPlannerText !== lastSnapshotText.get(e.sessionId)) {
+                    lastSnapshotText.set(e.sessionId, lastPlannerText);
+                    writeChatSnapshot(`🤖 **${e.title}**\n\n${lastPlannerText}`);
+                    console.log(`Gravity Bridge: [SDK] 💬 snapshot written (${lastPlannerText.length} chars)`);
+                }
+                return;
             }
         }
         catch (err) {
-            console.log(`Gravity Bridge: [SDK] GetCascadeTrajectorySteps error: ${err.message}`);
+            console.log(`Gravity Bridge: [SDK] steps error: ${err.message}`);
-            // Fallback: try GetCascadeTrajectory (full trajectory, heavier)
-            try {
-                const fullTraj = await sdk.ls.rawRPC('GetCascadeTrajectory', {
-                    cascadeId: e.sessionId
-                });
-                if (fullTraj) {
-                    const aiText = extractAIText(fullTraj);
-                    if (aiText) {
-                        writeChatSnapshot(`🤖 **${e.title}**\n\n${aiText}`);
-                        console.log(`Gravity Bridge: [SDK] relayed via GetCascadeTrajectory (${aiText.length} chars)`);
-                        return;
-                    }
-                    console.log(`Gravity Bridge: [SDK] trajectory keys: ${JSON.stringify(Object.keys(fullTraj))}`);
-                }
-            }
-            catch (err2) {
-                console.log(`Gravity Bridge: [SDK] GetCascadeTrajectory also failed: ${err2.message}`);
-            }
         }
-        // Fallback: just send the title + step info
+        // Fallback
         lastSeenStep.set(e.sessionId, e.newCount);
-        writeChatSnapshot(`🤖 **${e.title}**\n\n(step ${e.newCount}, +${e.delta})`);
     });
     // New conversation started
-    sdk.monitor.onNewConversation(() => {
+    sdk.monitor.onNewConversation((e) => {
-        console.log('Gravity Bridge: [SDK] new conversation detected');
+        console.log(`Gravity Bridge: [SDK] new conversation: ${e.title}`);
+        writeChatSnapshot(`🚀 **${e.title}** — 새 대화 시작`);
     });
     // Active session changed
     sdk.monitor.onActiveSessionChanged((e) => {
@@ -296,50 +303,182 @@ function setupMonitor() {
     sdk.monitor.start(3000, 2000);
     console.log('Gravity Bridge: [SDK] monitor started (USS 3s, trajectory 2s)');
 }
+// ─── Response Watcher (Discord approval → Antigravity RPC) ───
+let responseWatcher = null;
+function setupResponseWatcher() {
+    const responseDir = path.join(bridgePath, 'response');
+    if (!fs.existsSync(responseDir)) {
+        fs.mkdirSync(responseDir, { recursive: true });
+    }
+    try {
+        responseWatcher = fs.watch(responseDir, (event, filename) => {
+            if (filename && filename.endsWith('.json') && event === 'rename') {
+                const fp = path.join(responseDir, filename);
+                if (fs.existsSync(fp)) {
+                    setTimeout(() => processResponseFile(fp), 300);
+                }
+            }
+        });
+        console.log('Gravity Bridge: response watcher started');
+    }
+    catch (e) {
+        console.log(`Gravity Bridge: response watcher failed: ${e.message}`);
+    }
+}
+async function processResponseFile(filePath) {
+    try {
+        const content = fs.readFileSync(filePath, 'utf-8');
+        const resp = JSON.parse(content);
+        console.log(`Gravity Bridge: [RESPONSE] request_id=${resp.request_id} approved=${resp.approved}`);
+        if (!sdk) {
+            console.log('Gravity Bridge: [RESPONSE] SDK not available');
+            return;
+        }
+        // Find matching pending request for session_id
+        const pendingDir = path.join(bridgePath, 'pending');
+        const pendingFile = path.join(pendingDir, `${resp.request_id}.json`);
+        let sessionId = '';
+        if (fs.existsSync(pendingFile)) {
+            try {
+                const pending = JSON.parse(fs.readFileSync(pendingFile, 'utf-8'));
+                sessionId = pending.conversation_id || '';
+            }
+            catch { }
+        }
+        if (sessionId && resp.approved) {
+            try {
+                await sdk.ls.rawRPC('HandleCascadeUserInteraction', {
+                    cascadeId: sessionId,
+                    approved: true,
+                });
+                console.log('Gravity Bridge: [RESPONSE] ✅ approved via HandleCascadeUserInteraction');
+            }
+            catch (e) {
+                console.log(`Gravity Bridge: [RESPONSE] HandleCascadeUserInteraction failed: ${e.message}`);
+                try {
+                    await sdk.ls.rawRPC('ResolveOutstandingSteps', { cascadeId: sessionId });
+                    console.log('Gravity Bridge: [RESPONSE] ✅ approved via ResolveOutstandingSteps');
+                }
+                catch (e2) {
+                    console.log(`Gravity Bridge: [RESPONSE] ResolveOutstandingSteps also failed: ${e2.message}`);
+                }
+            }
+        }
+        else {
+            console.log(`Gravity Bridge: [RESPONSE] ${resp.approved ? '✅' : '❌'} (session=${sessionId || 'unknown'})`);
+        }
+        try {
+            fs.unlinkSync(filePath);
+        }
+        catch { }
+    }
+    catch (e) {
+        console.log(`Gravity Bridge: [RESPONSE] error: ${e.message}`);
+    }
+}
 /**
- * Extract AI response text from LS RPC step/trajectory data.
+ * Extract AI text from a PLANNER_RESPONSE step.
- * The exact structure depends on the protobuf schema — we try multiple paths.
+ * Known structure: {type, status, metadata, plannerResponse, ephemeralMessage, ...}
+ * ephemeralMessage = system prompt (SKIP), plannerResponse = AI content
  */
-function extractAIText(data) {
+function extractPlannerText(step) {
-    if (!data) {
+    if (!step) {
         return null;
     }
-    // Try common protobuf response patterns
+    // Fields to SKIP — not user-facing content
-    // Pattern 1: steps array with content
+    const SKIP_FIELDS = new Set([
-    const steps = data.steps || data.trajectorySteps || data.cascadeSteps;
+        'thinking', 'thinkingSignature', 'stopReason', 'type', 'status', 'metadata',
-    if (Array.isArray(steps) && steps.length > 0) {
+        'ephemeralMessage', 'generatorModel', 'requestedModel',
-        // Find the last step with AI content
+        'executionId', 'sourceTrajectoryStepInfo', 'stepIndex',
-        for (let i = steps.length - 1; i >= 0; i--) {
+        'viewableAt', 'createdAt', 'finishedGeneratingAt',
-            const step = steps[i];
+        'lastCompletedChunkAt', 'source', 'stepGenerationVersion'
-            // PlannerResponse / assistant content
+    ]);
-            const content = step.content || step.text || step.summary ||
+    // plannerResponse can be string or object
-                step.plannerResponse || step.assistantMessage ||
+    const pr = step.plannerResponse;
-                step.response?.content || step.response?.text;
+    if (typeof pr === 'string' && pr.length > 10) {
-            if (typeof content === 'string' && content.length > 10) {
+        return filterEphemeral(pr);
-                return content;
+    }
+    if (pr && typeof pr === 'object') {
+        // Try known content fields first (NOT thinking/stopReason)
+        const text = pr.content || pr.text || pr.summary || pr.message || pr.response || pr.output;
+        if (typeof text === 'string' && text.length > 10) {
+            return filterEphemeral(text);
+        }
+        // Search other fields, but skip non-content ones
+        for (const key of Object.keys(pr)) {
+            if (SKIP_FIELDS.has(key))
+                continue;
+            const val = pr[key];
+            if (typeof val === 'string' && val.length > 50) { // Higher threshold
+                const filtered = filterEphemeral(val);
+                if (filtered) {
+                    console.log(`Gravity Bridge: [DEBUG] planner text in plannerResponse.${key} (${filtered.length} chars)`);
+                    return filtered;
+                }
             }
         }
     }
-    // Pattern 2: messages array
+    // Try other step fields (skip known non-content)
-    const messages = data.messages || data.chatMessages;
+    for (const key of Object.keys(step)) {
-    if (Array.isArray(messages) && messages.length > 0) {
+        if (SKIP_FIELDS.has(key) || key === 'plannerResponse')
-        for (let i = messages.length - 1; i >= 0; i--) {
+            continue;
-            const msg = messages[i];
+        const val = step[key];
-            if ((msg.role === 'assistant' || msg.type === 'assistant') && msg.content) {
+        if (typeof val === 'string' && val.length > 50) {
-                return msg.content;
+            const filtered = filterEphemeral(val);
+            if (filtered) {
+                console.log(`Gravity Bridge: [DEBUG] planner text in step.${key}`);
+                return filtered;
             }
         }
     }
-    // Pattern 3: nested trajectory object
-    if (data.trajectory) {
-        return extractAIText(data.trajectory);
-    }
-    // Pattern 4: single step response
-    if (data.content && typeof data.content === 'string') {
-        return data.content;
-    }
     return null;
 }
+/** Filter out system ephemeral messages and non-content strings. */
+function filterEphemeral(text) {
+    if (!text || text.length < 10) {
+        return null;
+    }
+    // Skip system prompt metadata
+    if (text.includes('<EPHEMERAL_MESSAGE>') || text.includes('<ephemeral_message>')) {
+        return null;
+    }
+    if (text.includes('artifact_reminder') || text.includes('active_task_reminder')) {
+        return null;
+    }
+    if (text.includes('no_active_task_reminder')) {
+        return null;
+    }
+    // Skip base64/crypto strings (no spaces, mostly alphanumeric)
+    if (!text.includes(' ') && /^[A-Za-z0-9+/=_\-]{50,}$/.test(text)) {
+        return null;
+    }
+    return text;
+}
+/** Write a pending approval file matching Bot's ApprovalRequest dataclass. */
+function writePendingApproval(data) {
+    try {
+        const pendingDir = path.join(bridgePath, 'pending');
+        if (!fs.existsSync(pendingDir)) {
+            fs.mkdirSync(pendingDir, { recursive: true });
+        }
+        const id = Date.now().toString();
+        const payload = {
+            request_id: id,
+            conversation_id: data.conversation_id,
+            command: data.command,
+            description: data.description,
+            timestamp: Date.now() / 1000,
+            status: 'pending',
+            discord_message_id: 0,
+            project_name: projectName,
+        };
+        fs.writeFileSync(path.join(pendingDir, `${id}.json`), JSON.stringify(payload, null, 2), 'utf-8');
+        console.log(`Gravity Bridge: pending approval written → ${id}.json`);
+    }
+    catch (e) {
+        console.log(`Gravity Bridge: pending write error: ${e.message}`);
+    }
+}
 // ─── Activation ───
 async function activate(context) {
     console.log('Gravity Bridge: activating...');
@@ -389,6 +528,8 @@ async function activate(context) {
     }
     // Watch commands directory
     watchCommandsDir();
+    // Watch response directory for approval interactions
+    setupResponseWatcher();
     // Register basic commands
     context.subscriptions.push(vscode.commands.registerCommand('gravityBridge.start', () => {
         isActive = true;

extension/src/extension.ts

@@ -83,12 +83,6 @@ function writeChatSnapshot(text: string) {
     }
 }
 
-function writePendingApproval(data: any) {
-    try {
-        const filePath = path.join(bridgePath, 'response', 'pending_approval.json');
-        fs.writeFileSync(filePath, JSON.stringify(data, null, 2), 'utf-8');
-    } catch { }
-}
 
 // ─── Command File Watcher (Discord → Antigravity) ───
 
@@ -199,6 +193,7 @@ async function initSDK(context: vscode.ExtensionContext): Promise<boolean> {
 
 // Track last seen step per session to avoid re-fetching
 const lastSeenStep = new Map<string, number>();
+const lastSnapshotText = new Map<string, string>(); // dedup: last written text per session
 
 function setupMonitor() {
     if (!sdk) { return; }
@@ -208,58 +203,75 @@ function setupMonitor() {
         console.log(`Gravity Bridge: [SDK] step changed: "${e.title}" step ${e.newCount} (+${e.delta})`);
 
         try {
-            // Use the correct LS RPC: GetCascadeTrajectorySteps (not GetConversation which doesn't exist)
+            // IMPORTANT: Only fetch NEW steps, never re-fetch history
-            const fromStep = lastSeenStep.get(e.sessionId) ?? Math.max(0, e.newCount - e.delta);
+            const fromStep = Math.max(
-
+                lastSeenStep.get(e.sessionId) ?? e.newCount - e.delta,
+                e.newCount - e.delta
+            );
             const stepsData = await sdk.ls.rawRPC('GetCascadeTrajectorySteps', {
-                cascadeId: e.sessionId,
+                cascadeId: e.sessionId, startStepIndex: fromStep
-                startStepIndex: fromStep
             });
-
             lastSeenStep.set(e.sessionId, e.newCount);
 
-            if (stepsData) {
+            if (stepsData && Array.isArray(stepsData.steps)) {
-                // Try to extract AI text from the steps response
+                // API may ignore startStepIndex — only process the last e.delta steps
-                const aiText = extractAIText(stepsData);
+                const allSteps = stepsData.steps;
-                if (aiText) {
+                const newSteps = allSteps.slice(-e.delta);
-                    const text = `🤖 **${e.title}**\n\n${aiText}`;
+                console.log(`Gravity Bridge: [SDK] processing ${newSteps.length} of ${allSteps.length} steps`);
-                    writeChatSnapshot(text);
+
-                    console.log(`Gravity Bridge: [SDK] relayed AI response (${aiText.length} chars)`);
+                let lastPlannerText = '';
-                    return;
+                for (const step of newSteps) {
+                    const sType = step.type || '';
+                    const sStatus = step.status || '';
+
+                    // ── RUN_COMMAND + WAITING → Pending Approval ──
+                    if (sType.includes('RUN_COMMAND') && sStatus.includes('WAITING')) {
+                        const rc = step.runCommand || {};
+                        const cmdLine = rc.commandLine || rc.proposedCommandLine || '';
+                        writePendingApproval({
+                            conversation_id: e.sessionId,
+                            command: cmdLine,
+                            description: `💻 ${e.title}\n\`\`\`\n${cmdLine}\n\`\`\`\ncwd: ${rc.cwd || ''}`,
+                        });
+                        console.log(`Gravity Bridge: [SDK] ⏳ pending: "${cmdLine.substring(0, 100)}"`);
+                        continue;
+                    }
+
+                    // ── PLANNER_RESPONSE → collect AI text (COMPLETED/DONE only) ──
+                    if (sType.includes('PLANNER_RESPONSE')) {
+                        if (!sStatus.includes('COMPLETED') && !sStatus.includes('DONE')) {
+                            continue;
+                        }
+                        const pr = step.plannerResponse;
+                        // Use confirmed field: plannerResponse.response or .modifiedResponse
+                        const responseText = pr?.modifiedResponse || pr?.response || '';
+                        if (responseText && typeof responseText === 'string' && responseText.length > 0) {
+                            lastPlannerText = responseText; // Overwrite — last one wins
+                            console.log(`Gravity Bridge: [SDK] 📝 planner response found (${responseText.length} chars)`);
+                        }
+                        continue;
+                    }
                 }
-                // Log the raw structure for debugging
+
-                console.log(`Gravity Bridge: [SDK] steps data keys: ${JSON.stringify(Object.keys(stepsData))}`);
+                // Write the LAST planner response as snapshot (with dedup)
+                if (lastPlannerText && lastPlannerText !== lastSnapshotText.get(e.sessionId)) {
+                    lastSnapshotText.set(e.sessionId, lastPlannerText);
+                    writeChatSnapshot(`🤖 **${e.title}**\n\n${lastPlannerText}`);
+                    console.log(`Gravity Bridge: [SDK] 💬 snapshot written (${lastPlannerText.length} chars)`);
+                }
+                return;
             }
         } catch (err: any) {
-            console.log(`Gravity Bridge: [SDK] GetCascadeTrajectorySteps error: ${err.message}`);
+            console.log(`Gravity Bridge: [SDK] steps error: ${err.message}`);
-
-            // Fallback: try GetCascadeTrajectory (full trajectory, heavier)
-            try {
-                const fullTraj = await sdk.ls.rawRPC('GetCascadeTrajectory', {
-                    cascadeId: e.sessionId
-                });
-                if (fullTraj) {
-                    const aiText = extractAIText(fullTraj);
-                    if (aiText) {
-                        writeChatSnapshot(`🤖 **${e.title}**\n\n${aiText}`);
-                        console.log(`Gravity Bridge: [SDK] relayed via GetCascadeTrajectory (${aiText.length} chars)`);
-                        return;
-                    }
-                    console.log(`Gravity Bridge: [SDK] trajectory keys: ${JSON.stringify(Object.keys(fullTraj))}`);
-                }
-            } catch (err2: any) {
-                console.log(`Gravity Bridge: [SDK] GetCascadeTrajectory also failed: ${err2.message}`);
-            }
         }
-
+        // Fallback
-        // Fallback: just send the title + step info
         lastSeenStep.set(e.sessionId, e.newCount);
-        writeChatSnapshot(`🤖 **${e.title}**\n\n(step ${e.newCount}, +${e.delta})`);
     });
 
     // New conversation started
-    sdk.monitor.onNewConversation(() => {
+    sdk.monitor.onNewConversation((e: any) => {
-        console.log('Gravity Bridge: [SDK] new conversation detected');
+        console.log(`Gravity Bridge: [SDK] new conversation: ${e.title}`);
+        writeChatSnapshot(`🚀 **${e.title}** — 새 대화 시작`);
     });
 
     // Active session changed
@@ -277,54 +289,171 @@ function setupMonitor() {
     console.log('Gravity Bridge: [SDK] monitor started (USS 3s, trajectory 2s)');
 }
 
+// ─── Response Watcher (Discord approval → Antigravity RPC) ───
+
+let responseWatcher: fs.FSWatcher | null = null;
+
+function setupResponseWatcher() {
+    const responseDir = path.join(bridgePath, 'response');
+    if (!fs.existsSync(responseDir)) {
+        fs.mkdirSync(responseDir, { recursive: true });
+    }
+
+    try {
+        responseWatcher = fs.watch(responseDir, (event, filename) => {
+            if (filename && filename.endsWith('.json') && event === 'rename') {
+                const fp = path.join(responseDir, filename);
+                if (fs.existsSync(fp)) {
+                    setTimeout(() => processResponseFile(fp), 300);
+                }
+            }
+        });
+        console.log('Gravity Bridge: response watcher started');
+    } catch (e: any) {
+        console.log(`Gravity Bridge: response watcher failed: ${e.message}`);
+    }
+}
+
+async function processResponseFile(filePath: string) {
+    try {
+        const content = fs.readFileSync(filePath, 'utf-8');
+        const resp = JSON.parse(content);
+        console.log(`Gravity Bridge: [RESPONSE] request_id=${resp.request_id} approved=${resp.approved}`);
+
+        if (!sdk) {
+            console.log('Gravity Bridge: [RESPONSE] SDK not available');
+            return;
+        }
+
+        // Find matching pending request for session_id
+        const pendingDir = path.join(bridgePath, 'pending');
+        const pendingFile = path.join(pendingDir, `${resp.request_id}.json`);
+        let sessionId = '';
+        if (fs.existsSync(pendingFile)) {
+            try {
+                const pending = JSON.parse(fs.readFileSync(pendingFile, 'utf-8'));
+                sessionId = pending.conversation_id || '';
+            } catch { }
+        }
+
+        if (sessionId && resp.approved) {
+            try {
+                await sdk.ls.rawRPC('HandleCascadeUserInteraction', {
+                    cascadeId: sessionId,
+                    approved: true,
+                });
+                console.log('Gravity Bridge: [RESPONSE] ✅ approved via HandleCascadeUserInteraction');
+            } catch (e: any) {
+                console.log(`Gravity Bridge: [RESPONSE] HandleCascadeUserInteraction failed: ${e.message}`);
+                try {
+                    await sdk.ls.rawRPC('ResolveOutstandingSteps', { cascadeId: sessionId });
+                    console.log('Gravity Bridge: [RESPONSE] ✅ approved via ResolveOutstandingSteps');
+                } catch (e2: any) {
+                    console.log(`Gravity Bridge: [RESPONSE] ResolveOutstandingSteps also failed: ${e2.message}`);
+                }
+            }
+        } else {
+            console.log(`Gravity Bridge: [RESPONSE] ${resp.approved ? '✅' : '❌'} (session=${sessionId || 'unknown'})`);
+        }
+
+        try { fs.unlinkSync(filePath); } catch { }
+    } catch (e: any) {
+        console.log(`Gravity Bridge: [RESPONSE] error: ${e.message}`);
+    }
+}
+
 /**
- * Extract AI response text from LS RPC step/trajectory data.
+ * Extract AI text from a PLANNER_RESPONSE step.
- * The exact structure depends on the protobuf schema — we try multiple paths.
+ * Known structure: {type, status, metadata, plannerResponse, ephemeralMessage, ...}
+ * ephemeralMessage = system prompt (SKIP), plannerResponse = AI content
  */
-function extractAIText(data: any): string | null {
+function extractPlannerText(step: any): string | null {
-    if (!data) { return null; }
+    if (!step) { return null; }
 
-    // Try common protobuf response patterns
+    // Fields to SKIP — not user-facing content
-    // Pattern 1: steps array with content
+    const SKIP_FIELDS = new Set([
-    const steps = data.steps || data.trajectorySteps || data.cascadeSteps;
+        'thinking', 'thinkingSignature', 'stopReason', 'type', 'status', 'metadata',
-    if (Array.isArray(steps) && steps.length > 0) {
+        'ephemeralMessage', 'generatorModel', 'requestedModel',
-        // Find the last step with AI content
+        'executionId', 'sourceTrajectoryStepInfo', 'stepIndex',
-        for (let i = steps.length - 1; i >= 0; i--) {
+        'viewableAt', 'createdAt', 'finishedGeneratingAt',
-            const step = steps[i];
+        'lastCompletedChunkAt', 'source', 'stepGenerationVersion'
-            // PlannerResponse / assistant content
+    ]);
-            const content = step.content || step.text || step.summary ||
+
-                step.plannerResponse || step.assistantMessage ||
+    // plannerResponse can be string or object
-                step.response?.content || step.response?.text;
+    const pr = step.plannerResponse;
-            if (typeof content === 'string' && content.length > 10) {
+    if (typeof pr === 'string' && pr.length > 10) {
-                return content;
+        return filterEphemeral(pr);
+    }
+    if (pr && typeof pr === 'object') {
+        // Try known content fields first (NOT thinking/stopReason)
+        const text = pr.content || pr.text || pr.summary || pr.message || pr.response || pr.output;
+        if (typeof text === 'string' && text.length > 10) {
+            return filterEphemeral(text);
+        }
+        // Search other fields, but skip non-content ones
+        for (const key of Object.keys(pr)) {
+            if (SKIP_FIELDS.has(key)) continue;
+            const val = pr[key];
+            if (typeof val === 'string' && val.length > 50) { // Higher threshold
+                const filtered = filterEphemeral(val);
+                if (filtered) {
+                    console.log(`Gravity Bridge: [DEBUG] planner text in plannerResponse.${key} (${filtered.length} chars)`);
+                    return filtered;
+                }
             }
         }
     }
 
-    // Pattern 2: messages array
+    // Try other step fields (skip known non-content)
-    const messages = data.messages || data.chatMessages;
+    for (const key of Object.keys(step)) {
-    if (Array.isArray(messages) && messages.length > 0) {
+        if (SKIP_FIELDS.has(key) || key === 'plannerResponse') continue;
-        for (let i = messages.length - 1; i >= 0; i--) {
+        const val = step[key];
-            const msg = messages[i];
+        if (typeof val === 'string' && val.length > 50) {
-            if ((msg.role === 'assistant' || msg.type === 'assistant') && msg.content) {
+            const filtered = filterEphemeral(val);
-                return msg.content;
+            if (filtered) {
+                console.log(`Gravity Bridge: [DEBUG] planner text in step.${key}`);
+                return filtered;
             }
         }
     }
-
-    // Pattern 3: nested trajectory object
-    if (data.trajectory) {
-        return extractAIText(data.trajectory);
-    }
-
-    // Pattern 4: single step response
-    if (data.content && typeof data.content === 'string') {
-        return data.content;
-    }
-
     return null;
 }
 
+/** Filter out system ephemeral messages and non-content strings. */
+function filterEphemeral(text: string): string | null {
+    if (!text || text.length < 10) { return null; }
+    // Skip system prompt metadata
+    if (text.includes('<EPHEMERAL_MESSAGE>') || text.includes('<ephemeral_message>')) { return null; }
+    if (text.includes('artifact_reminder') || text.includes('active_task_reminder')) { return null; }
+    if (text.includes('no_active_task_reminder')) { return null; }
+    // Skip base64/crypto strings (no spaces, mostly alphanumeric)
+    if (!text.includes(' ') && /^[A-Za-z0-9+/=_\-]{50,}$/.test(text)) { return null; }
+    return text;
+}
+
+/** Write a pending approval file matching Bot's ApprovalRequest dataclass. */
+function writePendingApproval(data: { conversation_id: string; command: string; description: string }) {
+    try {
+        const pendingDir = path.join(bridgePath, 'pending');
+        if (!fs.existsSync(pendingDir)) { fs.mkdirSync(pendingDir, { recursive: true }); }
+        const id = Date.now().toString();
+        const payload = {
+            request_id: id,
+            conversation_id: data.conversation_id,
+            command: data.command,
+            description: data.description,
+            timestamp: Date.now() / 1000,
+            status: 'pending',
+            discord_message_id: 0,
+            project_name: projectName,
+        };
+        fs.writeFileSync(path.join(pendingDir, `${id}.json`), JSON.stringify(payload, null, 2), 'utf-8');
+        console.log(`Gravity Bridge: pending approval written → ${id}.json`);
+    } catch (e: any) {
+        console.log(`Gravity Bridge: pending write error: ${e.message}`);
+    }
+}
+
 // ─── Activation ───
 
 export async function activate(context: vscode.ExtensionContext) {
@@ -383,6 +512,8 @@ export async function activate(context: vscode.ExtensionContext) {
     // Watch commands directory
     watchCommandsDir();
 
+    // Watch response directory for approval interactions
+    setupResponseWatcher();
     // Register basic commands
     context.subscriptions.push(
         vscode.commands.registerCommand('gravityBridge.start', () => {