fix: stabilize session diagnostics and Windows session loading

Fix duplicated health probe URL in diagnostics
Share session list proxy handling across platforms
Avoid repeated hanging session requests on Windows

packages/ui/src/lib/openCodeStatus.ts

@@ -235,7 +235,7 @@ export const buildOpenCodeStatusReport = async (): Promise<string> => {
   };
 
   const probeTargets: Array<{ label: string; path: string; includeDirectory?: boolean; timeoutMs?: number }> = [
-    { label: 'health', path: '/api/health', includeDirectory: false },
+    { label: 'health', path: '/health', includeDirectory: false },
     { label: 'config', path: '/config', includeDirectory: true },
     { label: 'providers', path: '/config/providers', includeDirectory: true },
     { label: 'agents', path: '/agent', includeDirectory: true, timeoutMs: 12000 },

packages/web/server/lib/opencode/proxy.js

@@ -411,44 +411,69 @@ export const registerOpenCodeProxy = (app, deps) => {
     }
   };
 
-  const forwardSanitizedSessionListRequest = async (req, res, next, logLabel) => {
+  const fetchSessionListPayload = async (upstreamPath, { req = null, timeoutMs = null } = {}) => {
+    const headers = req
+      ? {
+          ...collectForwardProxyHeaders(req.headers, getOpenCodeAuthHeaders()),
+          accept: 'application/json',
+          'accept-encoding': 'identity',
+        }
+      : {
+          Accept: 'application/json',
+          ...getOpenCodeAuthHeaders(),
+          'accept-encoding': 'identity',
+        };
+    const upstream = await fetch(buildOpenCodeUrl(upstreamPath, ''), {
+      method: 'GET',
+      headers,
+      ...(typeof timeoutMs === 'number' ? { signal: AbortSignal.timeout(timeoutMs) } : {}),
+    });
+    const contentType = upstream.headers.get('content-type') || 'application/json; charset=utf-8';
+    const bodyText = await upstream.text();
+    const isJson = contentType.toLowerCase().includes('application/json');
+
+    if (!isJson) {
+      return { upstream, contentType, bodyText, payload: null, isJson: false };
+    }
+
     try {
+      const payload = JSON.parse(bodyText);
+      return { upstream, contentType, bodyText, payload, isJson: true, parseError: null };
+    } catch (parseError) {
+      return { upstream, contentType, bodyText, payload: null, isJson: true, parseError };
+    }
+  };
+
+  const getRequestUpstreamPath = async (req) => {
     const requestUrl = typeof req.originalUrl === 'string' && req.originalUrl.length > 0
       ? req.originalUrl
       : (typeof req.url === 'string' ? req.url : '');
     const upstreamPathRaw = requestUrl.startsWith('/api') ? requestUrl.slice(4) || '/' : requestUrl;
-      const upstreamPath = await canonicalizeDirectoryQuery(upstreamPathRaw);
+    return canonicalizeDirectoryQuery(upstreamPathRaw);
-      const upstream = await fetch(buildOpenCodeUrl(upstreamPath, ''), {
+  };
-        method: 'GET',
-        headers: {
-          ...collectForwardProxyHeaders(req.headers, getOpenCodeAuthHeaders()),
-          accept: 'application/json',
-          'accept-encoding': 'identity',
-        },
-      });
 
-      res.status(upstream.status);
+  const forwardSanitizedSessionListRequest = async (req, res, next, logLabel) => {
-      applyForwardProxyResponseHeaders(upstream.headers, res);
-
-      const contentType = upstream.headers.get('content-type') || 'application/json; charset=utf-8';
-      const bodyText = await upstream.text();
-      if (!contentType.toLowerCase().includes('application/json')) {
-        res.setHeader('content-type', contentType);
-        res.end(bodyText);
-        return;
-      }
-
-      let payload;
     try {
-        payload = JSON.parse(bodyText);
+      const upstreamPath = await getRequestUpstreamPath(req);
-      } catch {
+      const result = await fetchSessionListPayload(upstreamPath, { req });
-        res.setHeader('content-type', contentType);
+
-        res.end(bodyText);
+      res.status(result.upstream.status);
+      applyForwardProxyResponseHeaders(result.upstream.headers, res);
+
+      if (!result.isJson) {
+        res.setHeader('content-type', result.contentType);
+        res.end(result.bodyText);
         return;
       }
 
-      res.setHeader('content-type', contentType);
+      if (result.parseError || !Array.isArray(result.payload)) {
-      res.json(sanitizeSessionListPayload(payload));
+        res.setHeader('content-type', result.contentType);
+        res.end(result.bodyText);
+        return;
+      }
+
+      res.setHeader('content-type', result.contentType);
+      res.json(sanitizeSessionListPayload(result.payload));
     } catch (error) {
       if (isAbortError(error)) {
         return;
@@ -529,16 +554,17 @@ export const registerOpenCodeProxy = (app, deps) => {
       const rawUrl = req.originalUrl || req.url || '';
       if (rawUrl.includes('directory=')) return next();
 
-      try {
+      const fetchWindowsSessionList = async (sessionPath) => {
-        const authHeaders = getOpenCodeAuthHeaders();
+        const result = await fetchSessionListPayload(sessionPath, { req, timeoutMs: 10000 });
-        const fetchOpts = {
+        if (!result.upstream.ok || !Array.isArray(result.payload)) return null;
-          method: 'GET',
+        return sanitizeSessionListPayload(result.payload);
-          headers: { Accept: 'application/json', ...authHeaders },
-          signal: AbortSignal.timeout(10000),
       };
-        const globalRes = await fetch(buildOpenCodeUrl('/session', ''), fetchOpts);
+
-        const globalPayload = globalRes.ok ? await globalRes.json().catch(() => []) : [];
+      try {
-        const globalSessions = Array.isArray(globalPayload) ? globalPayload : [];
+        const globalSessions = await fetchWindowsSessionList('/session').catch((error) => {
+          console.log(`[SessionMerge] Global session list failed: ${error.message}`);
+          return null;
+        });
 
         const settingsPath = path.join(os.homedir(), '.config', 'openchamber', 'settings.json');
         let projectDirs = [];
@@ -552,11 +578,12 @@ export const registerOpenCodeProxy = (app, deps) => {
         }
 
         const seen = new Set(
-          globalSessions
+          (globalSessions || [])
             .map((session) => (session && typeof session.id === 'string' ? session.id : null))
             .filter((id) => typeof id === 'string')
         );
         const extraSessions = [];
+        let successfulProjectReads = 0;
         for (const dir of projectDirs) {
           const candidates = Array.from(new Set([
             dir,
@@ -566,34 +593,37 @@ export const registerOpenCodeProxy = (app, deps) => {
           for (const candidateDir of candidates) {
             const encoded = encodeURIComponent(candidateDir);
             try {
-              const dirRes = await fetch(buildOpenCodeUrl(`/session?directory=${encoded}`, ''), fetchOpts);
+              const dirSessions = await fetchWindowsSessionList(`/session?directory=${encoded}`);
-              if (dirRes.ok) {
+              if (dirSessions) {
-                const dirPayload = await dirRes.json().catch(() => []);
+                successfulProjectReads += 1;
-                const dirSessions = Array.isArray(dirPayload) ? dirPayload : [];
+              }
-                for (const session of dirSessions) {
+              for (const session of dirSessions || []) {
                 const id = session && typeof session.id === 'string' ? session.id : null;
                 if (id && !seen.has(id)) {
                   seen.add(id);
                   extraSessions.push(session);
                 }
               }
-              }
             } catch {
             }
           }
         }
 
-        const merged = [...globalSessions, ...extraSessions];
+        if (!globalSessions && successfulProjectReads === 0) {
+          return res.status(504).json({ error: 'OpenCode session list timed out' });
+        }
+
+        const merged = [...(globalSessions || []), ...extraSessions];
         merged.sort((a, b) => {
           const aTime = a && typeof a.time_updated === 'number' ? a.time_updated : 0;
           const bTime = b && typeof b.time_updated === 'number' ? b.time_updated : 0;
           return bTime - aTime;
         });
-        console.log(`[SessionMerge] ${globalSessions.length} global + ${extraSessions.length} extra = ${merged.length} total`);
+        console.log(`[SessionMerge] ${globalSessions?.length || 0} global + ${extraSessions.length} extra = ${merged.length} total`);
         return res.json(sanitizeSessionListPayload(merged));
       } catch (error) {
-        console.log(`[SessionMerge] Error: ${error.message}, falling through`);
+        console.log(`[SessionMerge] Error: ${error.message}`);
-        next();
+        return res.status(500).json({ error: error.message || 'Failed to merge Windows sessions' });
       }
     });
   }