fix(bridge): align Extension protocol with Bot — 3 mismatches fixed

- Snapshot: response/chat_snapshot.txt → chat_snapshots/*.json
- Command field: cmd.message → cmd.text (matches Bot.write_command)
- RPC: GetConversation (404) → GetCascadeTrajectorySteps
- Bundle sql-wasm.js + sql-wasm.wasm into VSIX (45KB→379KB)
- Handle consumed flag, clean 38 stale commands
- Add extractAIText helper with fallback chain

docs/devlog/2026-03-08.md

@@ -0,0 +1,5 @@
+# 2026-03-08 Devlog — Bridge 프로토콜 수정
+
+| # | 시간 | 작업 | 커밋 | 상태 |
+|---|------|------|------|------|
+| 1 | 01:00 | Extension↔Bot 프로토콜 불일치 3건 수정 + sql-wasm 번들링 | 커밋예정 | 🔧 |

docs/devlog/entries/20260308-001.md

@@ -0,0 +1,26 @@
+# Extension↔Bot 프로토콜 불일치 수정 + sql-wasm 번들링
+
+- **시간**: 2026-03-08 00:50~01:10
+- **Commit**: 커밋예정
+- **Vikunja**: #240 → 진행중
+
+## 결정 사항
+
+### GetConversation → GetCascadeTrajectorySteps
+- SDK의 `getConversation()` 메서드가 `GetConversation` RPC를 호출하지만, LS에 해당 메서드 없음 (404)
+- `ls-rpc-reference.md`에서 확인: 실제 메서드는 `GetCascadeTrajectorySteps`
+- Fallback 체인: Steps → GetCascadeTrajectory → title-only
+
+### Bot↔Extension 프로토콜 불일치 3건
+1. **Snapshot**: Bot은 `chat_snapshots/*.json` (JSON), Extension은 `response/chat_snapshot.txt` (텍스트)
+2. **Command**: Bot은 `text` 필드, Extension은 `message` 필드 읽음
+3. **Consumed**: Bot이 `consumed: true` 설정하지만 Extension이 삭제하지 않아 38개 누적
+
+### sql-wasm.wasm VSIX 누락
+- `.vscodeignore`가 `node_modules/**` 제외 → sql.js wasm 파일 미포함
+- 해결: 빌드 시 `out/sdk/`에 수동 복사
+
+## 미완료
+- [ ] 윈도우 리로드 후 E2E 테스트 (Discord→Antigravity, Antigravity→Discord)
+- [ ] `GetCascadeTrajectorySteps` 응답 구조 파악 → extractAIText 정확도 검증
+- [ ] VSIX 빌드 스크립트에 sql-wasm 복사 자동화

extension/out/extension.js

@@ -87,7 +87,7 @@ function detectProjectName() {
 }
 // ─── Bridge File I/O ───
 function ensureBridgeDir() {
-    const dirs = ['', 'response', 'commands'];
+    const dirs = ['', 'response', 'commands', 'chat_snapshots'];
     for (const d of dirs) {
         const p = path.join(bridgePath, d);
         if (!fs.existsSync(p)) {
@@ -97,9 +97,21 @@ function ensureBridgeDir() {
 }
 function writeChatSnapshot(text) {
     try {
-        const filePath = path.join(bridgePath, 'response', 'chat_snapshot.txt');
-        fs.writeFileSync(filePath, text, 'utf-8');
-        console.log(`Gravity Bridge: chat snapshot written (${text.length} chars)`);
+        // Write to chat_snapshots/*.json for Bot's chat_snapshot_scanner to pick up
+        const snapshotDir = path.join(bridgePath, 'chat_snapshots');
+        if (!fs.existsSync(snapshotDir)) {
+            fs.mkdirSync(snapshotDir, { recursive: true });
+        }
+        const id = Date.now().toString();
+        const data = {
+            id,
+            project_name: projectName,
+            content: text,
+            timestamp: Date.now() / 1000,
+        };
+        const filePath = path.join(snapshotDir, `${id}.json`);
+        fs.writeFileSync(filePath, JSON.stringify(data, null, 2), 'utf-8');
+        console.log(`Gravity Bridge: chat snapshot written (${text.length} chars) → ${id}.json`);
     }
     catch (e) {
         console.log(`Gravity Bridge: snapshot write error: ${e.message}`);
@@ -117,31 +129,46 @@ function processCommandFile(filePath) {
     try {
         const content = fs.readFileSync(filePath, 'utf-8');
         const cmd = JSON.parse(content);
-        // Ignore commands for other projects
-        if (cmd.project_name && cmd.project_name !== projectName) {
-            console.log(`Gravity Bridge: skipping command for "${cmd.project_name}"`);
+        // Skip already consumed commands
+        if (cmd.consumed) {
+            try {
+                fs.unlinkSync(filePath);
+            }
+            catch { }
             return;
         }
-        console.log(`Gravity Bridge: command — "${cmd.message || cmd.action}"`);
-        if (cmd.action === 'approve' && sdk) {
+        // Ignore commands for other projects
+        if (cmd.project_name && cmd.project_name !== projectName) {
+            console.log(`Gravity Bridge: skipping command for "${cmd.project_name}" (we are "${projectName}")`);
+            return;
+        }
+        // Bot writes 'text' field, not 'message'
+        const text = cmd.text || cmd.message || '';
+        const action = cmd.action || '';
+        console.log(`Gravity Bridge: command — text="${text}" action="${action}"`);
+        if (action === 'approve' && sdk) {
             sdk.cascade.acceptStep().catch((e) => console.log(`Gravity Bridge: approve error: ${e.message}`));
         }
-        else if (cmd.action === 'reject' && sdk) {
+        else if (action === 'reject' && sdk) {
             sdk.cascade.rejectStep().catch((e) => console.log(`Gravity Bridge: reject error: ${e.message}`));
         }
-        else if (cmd.action === 'approve_terminal' && sdk) {
+        else if (action === 'approve_terminal' && sdk) {
             sdk.cascade.acceptTerminalCommand().catch((e) => console.log(`Gravity Bridge: approve_terminal error: ${e.message}`));
         }
-        else if (cmd.message && sdk) {
-            // Send message to Antigravity
-            sdk.cascade.sendPrompt(cmd.message).then(() => {
-                console.log(`Gravity Bridge: ✅ sent via SDK sendPrompt`);
-            }).catch((e) => {
-                // Fallback to VS Code command
-                console.log(`Gravity Bridge: SDK sendPrompt failed: ${e.message}, trying command...`);
-                vscode.commands.executeCommand('antigravity.sendPromptToAgentPanel', cmd.message)
-                    .then(() => console.log('Gravity Bridge: ✅ sent via sendPromptToAgentPanel'));
-            });
+        else if (text === '!stop') {
+            // Cancel current operation
+            vscode.commands.executeCommand('antigravity.agent.rejectAgentStep')
+                .then(() => console.log('Gravity Bridge: ✅ stop sent'), () => { });
+        }
+        else if (text.startsWith('!auto ')) {
+            // Auto-approve mode toggle
+            const mode = text.includes('on') ? 'true' : 'false';
+            console.log(`Gravity Bridge: auto-approve → ${mode}`);
+        }
+        else if (text) {
+            // Send message to Antigravity — use VS Code command (most reliable)
+            vscode.commands.executeCommand('antigravity.sendPromptToAgentPanel', text)
+                .then(() => console.log(`Gravity Bridge: ✅ sent "${text.substring(0, 50)}" via sendPromptToAgentPanel`), (e) => console.log(`Gravity Bridge: sendPrompt failed: ${e.message}`));
         }
         // Remove processed command file
         try {
@@ -198,42 +225,59 @@ async function initSDK(context) {
         return false;
     }
 }
+// Track last seen step per session to avoid re-fetching
+const lastSeenStep = new Map();
 function setupMonitor() {
     if (!sdk) {
         return;
     }
-    // Step count changed → fetch conversation content
+    // Step count changed → fetch new steps via GetCascadeTrajectorySteps
     sdk.monitor.onStepCountChanged(async (e) => {
         console.log(`Gravity Bridge: [SDK] step changed: "${e.title}" step ${e.newCount} (+${e.delta})`);
-        // Get fresh session to have the ID
         try {
-            const conversation = await sdk.ls.getConversation(e.sessionId);
-            if (conversation && conversation.messages) {
-                // Find the last assistant message
-                const assistantMsgs = conversation.messages.filter((m) => m.role === 'assistant' && m.content);
-                if (assistantMsgs.length > 0) {
-                    const lastMsg = assistantMsgs[assistantMsgs.length - 1];
-                    const text = `🤖 **${e.title}**\n\n${lastMsg.content}`;
+            // Use the correct LS RPC: GetCascadeTrajectorySteps (not GetConversation which doesn't exist)
+            const fromStep = lastSeenStep.get(e.sessionId) ?? Math.max(0, e.newCount - e.delta);
+            const stepsData = await sdk.ls.rawRPC('GetCascadeTrajectorySteps', {
+                cascadeId: e.sessionId,
+                startStepIndex: fromStep
+            });
+            lastSeenStep.set(e.sessionId, e.newCount);
+            if (stepsData) {
+                // Try to extract AI text from the steps response
+                const aiText = extractAIText(stepsData);
+                if (aiText) {
+                    const text = `🤖 **${e.title}**\n\n${aiText}`;
                     writeChatSnapshot(text);
-                    console.log(`Gravity Bridge: [SDK] relayed AI response (${lastMsg.content.length} chars)`);
-                    return;
-                }
-            }
-            // Find PlannerResponse steps
-            if (conversation && conversation.steps) {
-                const responses = conversation.steps.filter((s) => s.type === 'PlannerResponse' && s.summary);
-                if (responses.length > 0) {
-                    const last = responses[responses.length - 1];
-                    writeChatSnapshot(`🤖 **${e.title}**\n\n${last.summary}`);
-                    console.log(`Gravity Bridge: [SDK] relayed PlannerResponse (${last.summary.length} chars)`);
+                    console.log(`Gravity Bridge: [SDK] relayed AI response (${aiText.length} chars)`);
                     return;
                 }
+                // Log the raw structure for debugging
+                console.log(`Gravity Bridge: [SDK] steps data keys: ${JSON.stringify(Object.keys(stepsData))}`);
             }
         }
         catch (err) {
-            console.log(`Gravity Bridge: [SDK] getConversation error: ${err.message}`);
+            console.log(`Gravity Bridge: [SDK] GetCascadeTrajectorySteps 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: ${err2.message}`);
+            }
         }
         // Fallback: just send the title + step info
+        lastSeenStep.set(e.sessionId, e.newCount);
         writeChatSnapshot(`🤖 **${e.title}**\n\n(step ${e.newCount}, +${e.delta})`);
     });
     // New conversation started
@@ -252,6 +296,50 @@ function setupMonitor() {
     sdk.monitor.start(3000, 2000);
     console.log('Gravity Bridge: [SDK] monitor started (USS 3s, trajectory 2s)');
 }
+/**
+ * Extract AI response text from LS RPC step/trajectory data.
+ * The exact structure depends on the protobuf schema — we try multiple paths.
+ */
+function extractAIText(data) {
+    if (!data) {
+        return null;
+    }
+    // Try common protobuf response patterns
+    // Pattern 1: steps array with content
+    const steps = data.steps || data.trajectorySteps || data.cascadeSteps;
+    if (Array.isArray(steps) && steps.length > 0) {
+        // Find the last step with AI content
+        for (let i = steps.length - 1; i >= 0; i--) {
+            const step = steps[i];
+            // PlannerResponse / assistant content
+            const content = step.content || step.text || step.summary ||
+                step.plannerResponse || step.assistantMessage ||
+                step.response?.content || step.response?.text;
+            if (typeof content === 'string' && content.length > 10) {
+                return content;
+            }
+        }
+    }
+    // Pattern 2: messages array
+    const messages = data.messages || data.chatMessages;
+    if (Array.isArray(messages) && messages.length > 0) {
+        for (let i = messages.length - 1; i >= 0; i--) {
+            const msg = messages[i];
+            if ((msg.role === 'assistant' || msg.type === 'assistant') && msg.content) {
+                return msg.content;
+            }
+        }
+    }
+    // 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;
+}
 // ─── Activation ───
 async function activate(context) {
     console.log('Gravity Bridge: activating...');

extension/src/extension.ts

@@ -56,7 +56,7 @@ function detectProjectName(): string {
 // ─── Bridge File I/O ───
 
 function ensureBridgeDir() {
-    const dirs = ['', 'response', 'commands'];
+    const dirs = ['', 'response', 'commands', 'chat_snapshots'];
     for (const d of dirs) {
         const p = path.join(bridgePath, d);
         if (!fs.existsSync(p)) { fs.mkdirSync(p, { recursive: true }); }
@@ -65,9 +65,19 @@ function ensureBridgeDir() {
 
 function writeChatSnapshot(text: string) {
     try {
-        const filePath = path.join(bridgePath, 'response', 'chat_snapshot.txt');
-        fs.writeFileSync(filePath, text, 'utf-8');
-        console.log(`Gravity Bridge: chat snapshot written (${text.length} chars)`);
+        // Write to chat_snapshots/*.json for Bot's chat_snapshot_scanner to pick up
+        const snapshotDir = path.join(bridgePath, 'chat_snapshots');
+        if (!fs.existsSync(snapshotDir)) { fs.mkdirSync(snapshotDir, { recursive: true }); }
+        const id = Date.now().toString();
+        const data = {
+            id,
+            project_name: projectName,
+            content: text,
+            timestamp: Date.now() / 1000,
+        };
+        const filePath = path.join(snapshotDir, `${id}.json`);
+        fs.writeFileSync(filePath, JSON.stringify(data, null, 2), 'utf-8');
+        console.log(`Gravity Bridge: chat snapshot written (${text.length} chars) → ${id}.json`);
     } catch (e: any) {
         console.log(`Gravity Bridge: snapshot write error: ${e.message}`);
     }
@@ -87,36 +97,50 @@ function processCommandFile(filePath: string) {
         const content = fs.readFileSync(filePath, 'utf-8');
         const cmd = JSON.parse(content);
 
-        // Ignore commands for other projects
-        if (cmd.project_name && cmd.project_name !== projectName) {
-            console.log(`Gravity Bridge: skipping command for "${cmd.project_name}"`);
+        // Skip already consumed commands
+        if (cmd.consumed) {
+            try { fs.unlinkSync(filePath); } catch { }
             return;
         }
 
-        console.log(`Gravity Bridge: command — "${cmd.message || cmd.action}"`);
+        // Ignore commands for other projects
+        if (cmd.project_name && cmd.project_name !== projectName) {
+            console.log(`Gravity Bridge: skipping command for "${cmd.project_name}" (we are "${projectName}")`);
+            return;
+        }
 
-        if (cmd.action === 'approve' && sdk) {
+        // Bot writes 'text' field, not 'message'
+        const text = cmd.text || cmd.message || '';
+        const action = cmd.action || '';
+
+        console.log(`Gravity Bridge: command — text="${text}" action="${action}"`);
+
+        if (action === 'approve' && sdk) {
             sdk.cascade.acceptStep().catch((e: any) =>
                 console.log(`Gravity Bridge: approve error: ${e.message}`)
             );
-        } else if (cmd.action === 'reject' && sdk) {
+        } else if (action === 'reject' && sdk) {
             sdk.cascade.rejectStep().catch((e: any) =>
                 console.log(`Gravity Bridge: reject error: ${e.message}`)
             );
-        } else if (cmd.action === 'approve_terminal' && sdk) {
+        } else if (action === 'approve_terminal' && sdk) {
             sdk.cascade.acceptTerminalCommand().catch((e: any) =>
                 console.log(`Gravity Bridge: approve_terminal error: ${e.message}`)
             );
-        } else if (cmd.message && sdk) {
-            // Send message to Antigravity
-            sdk.cascade.sendPrompt(cmd.message).then(() => {
-                console.log(`Gravity Bridge: ✅ sent via SDK sendPrompt`);
-            }).catch((e: any) => {
-                // Fallback to VS Code command
-                console.log(`Gravity Bridge: SDK sendPrompt failed: ${e.message}, trying command...`);
-                vscode.commands.executeCommand('antigravity.sendPromptToAgentPanel', cmd.message)
-                    .then(() => console.log('Gravity Bridge: ✅ sent via sendPromptToAgentPanel'));
-            });
+        } else if (text === '!stop') {
+            // Cancel current operation
+            vscode.commands.executeCommand('antigravity.agent.rejectAgentStep')
+                .then(() => console.log('Gravity Bridge: ✅ stop sent'),
+                    () => { });
+        } else if (text.startsWith('!auto ')) {
+            // Auto-approve mode toggle
+            const mode = text.includes('on') ? 'true' : 'false';
+            console.log(`Gravity Bridge: auto-approve → ${mode}`);
+        } else if (text) {
+            // Send message to Antigravity — use VS Code command (most reliable)
+            vscode.commands.executeCommand('antigravity.sendPromptToAgentPanel', text)
+                .then(() => console.log(`Gravity Bridge: ✅ sent "${text.substring(0, 50)}" via sendPromptToAgentPanel`),
+                    (e: any) => console.log(`Gravity Bridge: sendPrompt failed: ${e.message}`));
         }
 
         // Remove processed command file
@@ -173,47 +197,63 @@ async function initSDK(context: vscode.ExtensionContext): Promise<boolean> {
     }
 }
 
+// Track last seen step per session to avoid re-fetching
+const lastSeenStep = new Map<string, number>();
+
 function setupMonitor() {
     if (!sdk) { return; }
 
-    // Step count changed → fetch conversation content
+    // Step count changed → fetch new steps via GetCascadeTrajectorySteps
     sdk.monitor.onStepCountChanged(async (e: any) => {
         console.log(`Gravity Bridge: [SDK] step changed: "${e.title}" step ${e.newCount} (+${e.delta})`);
 
-        // Get fresh session to have the ID
         try {
-            const conversation = await sdk.ls.getConversation(e.sessionId);
-            if (conversation && conversation.messages) {
-                // Find the last assistant message
-                const assistantMsgs = conversation.messages.filter(
-                    (m: any) => m.role === 'assistant' && m.content
-                );
-                if (assistantMsgs.length > 0) {
-                    const lastMsg = assistantMsgs[assistantMsgs.length - 1];
-                    const text = `🤖 **${e.title}**\n\n${lastMsg.content}`;
-                    writeChatSnapshot(text);
-                    console.log(`Gravity Bridge: [SDK] relayed AI response (${lastMsg.content.length} chars)`);
-                    return;
-                }
-            }
+            // Use the correct LS RPC: GetCascadeTrajectorySteps (not GetConversation which doesn't exist)
+            const fromStep = lastSeenStep.get(e.sessionId) ?? Math.max(0, e.newCount - e.delta);
 
-            // Find PlannerResponse steps
-            if (conversation && conversation.steps) {
-                const responses = conversation.steps.filter(
-                    (s: any) => s.type === 'PlannerResponse' && s.summary
-                );
-                if (responses.length > 0) {
-                    const last = responses[responses.length - 1];
-                    writeChatSnapshot(`🤖 **${e.title}**\n\n${last.summary}`);
-                    console.log(`Gravity Bridge: [SDK] relayed PlannerResponse (${last.summary.length} chars)`);
+            const stepsData = await sdk.ls.rawRPC('GetCascadeTrajectorySteps', {
+                cascadeId: e.sessionId,
+                startStepIndex: fromStep
+            });
+
+            lastSeenStep.set(e.sessionId, e.newCount);
+
+            if (stepsData) {
+                // Try to extract AI text from the steps response
+                const aiText = extractAIText(stepsData);
+                if (aiText) {
+                    const text = `🤖 **${e.title}**\n\n${aiText}`;
+                    writeChatSnapshot(text);
+                    console.log(`Gravity Bridge: [SDK] relayed AI response (${aiText.length} chars)`);
                     return;
                 }
+                // Log the raw structure for debugging
+                console.log(`Gravity Bridge: [SDK] steps data keys: ${JSON.stringify(Object.keys(stepsData))}`);
             }
         } catch (err: any) {
-            console.log(`Gravity Bridge: [SDK] getConversation error: ${err.message}`);
+            console.log(`Gravity Bridge: [SDK] GetCascadeTrajectorySteps 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: just send the title + step info
+        lastSeenStep.set(e.sessionId, e.newCount);
         writeChatSnapshot(`🤖 **${e.title}**\n\n(step ${e.newCount}, +${e.delta})`);
     });
 
@@ -237,6 +277,54 @@ function setupMonitor() {
     console.log('Gravity Bridge: [SDK] monitor started (USS 3s, trajectory 2s)');
 }
 
+/**
+ * Extract AI response text from LS RPC step/trajectory data.
+ * The exact structure depends on the protobuf schema — we try multiple paths.
+ */
+function extractAIText(data: any): string | null {
+    if (!data) { return null; }
+
+    // Try common protobuf response patterns
+    // Pattern 1: steps array with content
+    const steps = data.steps || data.trajectorySteps || data.cascadeSteps;
+    if (Array.isArray(steps) && steps.length > 0) {
+        // Find the last step with AI content
+        for (let i = steps.length - 1; i >= 0; i--) {
+            const step = steps[i];
+            // PlannerResponse / assistant content
+            const content = step.content || step.text || step.summary ||
+                step.plannerResponse || step.assistantMessage ||
+                step.response?.content || step.response?.text;
+            if (typeof content === 'string' && content.length > 10) {
+                return content;
+            }
+        }
+    }
+
+    // Pattern 2: messages array
+    const messages = data.messages || data.chatMessages;
+    if (Array.isArray(messages) && messages.length > 0) {
+        for (let i = messages.length - 1; i >= 0; i--) {
+            const msg = messages[i];
+            if ((msg.role === 'assistant' || msg.type === 'assistant') && msg.content) {
+                return msg.content;
+            }
+        }
+    }
+
+    // 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;
+}
+
 // ─── Activation ───
 
 export async function activate(context: vscode.ExtensionContext) {