diff --git a/src/lib/agents/media/video.ts b/src/lib/agents/media/video.ts
index c8f19b69a..5703ebbbb 100644
--- a/src/lib/agents/media/video.ts
+++ b/src/lib/agents/media/video.ts
@@ -43,19 +43,31 @@ const searchVideos = async (
     schema: schema,
   });
 
-  const searchRes = await searchSearxng(res.query, {
-    engines: ['youtube'],
-  });
+  let searchRes;
+  try {
+    searchRes = await searchSearxng(res.query, {
+      engines: ['youtube'],
+    });
+  } catch (error) {
+    console.error(`Video search failed for query "${res.query}":`, error);
+    return [];
+  }
 
   const videos: VideoSearchResult[] = [];
 
   searchRes.results.forEach((result) => {
     if (result.thumbnail && result.url && result.title && result.iframe_src) {
+      // Normalize embed URL - some SearXNG instances return
+      // youtube-nocookie.com which doesn't resolve on all networks
+      const embedUrl = result.iframe_src.replace(
+        'www.youtube-nocookie.com/embed',
+        'www.youtube.com/embed',
+      );
       videos.push({
         img_src: result.thumbnail,
         url: result.url,
         title: result.title,
-        iframe_src: result.iframe_src,
+        iframe_src: embedUrl,
       });
     }
   });
diff --git a/src/lib/agents/search/researcher/actions/academicSearch.ts b/src/lib/agents/search/researcher/actions/academicSearch.ts
index 72e1f4b14..65c2adc6e 100644
--- a/src/lib/agents/search/researcher/actions/academicSearch.ts
+++ b/src/lib/agents/search/researcher/actions/academicSearch.ts
@@ -58,9 +58,17 @@ const academicSearchAction: ResearchAction<typeof schema> = {
     let results: Chunk[] = [];
 
     const search = async (q: string) => {
-      const res = await searchSearxng(q, {
-        engines: ['arxiv', 'google scholar', 'pubmed'],
-      });
+      let res;
+      try {
+        res = await searchSearxng(q, {
+          engines: ['arxiv', 'google scholar', 'pubmed'],
+        });
+      } catch (error) {
+        console.error(`Academic search failed for query "${q}":`, error);
+        return;
+      }
+
+      if (!res.results || res.results.length === 0) return;
 
       const resultChunks: Chunk[] = res.results.map((r) => ({
         content: r.content || r.title,
diff --git a/src/lib/agents/search/researcher/actions/scrapeURL.ts b/src/lib/agents/search/researcher/actions/scrapeURL.ts
index c702a7014..774998afe 100644
--- a/src/lib/agents/search/researcher/actions/scrapeURL.ts
+++ b/src/lib/agents/search/researcher/actions/scrapeURL.ts
@@ -118,6 +118,7 @@ const scrapeURLAction: ResearchAction<typeof schema> = {
             },
           });
         } catch (error) {
+          console.error(`Failed to scrape URL ${url}:`, error);
           results.push({
             content: `Failed to fetch content from ${url}: ${error}`,
             metadata: {
diff --git a/src/lib/agents/search/researcher/actions/socialSearch.ts b/src/lib/agents/search/researcher/actions/socialSearch.ts
index 16468ab4c..645c506e4 100644
--- a/src/lib/agents/search/researcher/actions/socialSearch.ts
+++ b/src/lib/agents/search/researcher/actions/socialSearch.ts
@@ -58,9 +58,17 @@ const socialSearchAction: ResearchAction<typeof schema> = {
     let results: Chunk[] = [];
 
     const search = async (q: string) => {
-      const res = await searchSearxng(q, {
-        engines: ['reddit'],
-      });
+      let res;
+      try {
+        res = await searchSearxng(q, {
+          engines: ['reddit'],
+        });
+      } catch (error) {
+        console.error(`Social search failed for query "${q}":`, error);
+        return;
+      }
+
+      if (!res.results || res.results.length === 0) return;
 
       const resultChunks: Chunk[] = res.results.map((r) => ({
         content: r.content || r.title,
diff --git a/src/lib/agents/search/researcher/actions/webSearch.ts b/src/lib/agents/search/researcher/actions/webSearch.ts
index 4d60b79f2..0184147cc 100644
--- a/src/lib/agents/search/researcher/actions/webSearch.ts
+++ b/src/lib/agents/search/researcher/actions/webSearch.ts
@@ -113,7 +113,15 @@ const webSearchAction: ResearchAction<typeof actionSchema> = {
     let results: Chunk[] = [];
 
     const search = async (q: string) => {
-      const res = await searchSearxng(q);
+      let res;
+      try {
+        res = await searchSearxng(q);
+      } catch (error) {
+        console.error(`SearXNG search failed for query "${q}":`, error);
+        return;
+      }
+
+      if (!res.results || res.results.length === 0) return;
 
       const resultChunks: Chunk[] = res.results.map((r) => ({
         content: r.content || r.title,
diff --git a/src/lib/models/providers/ollama/ollamaLLM.ts b/src/lib/models/providers/ollama/ollamaLLM.ts
index 3bcd3ccf1..998a09565 100644
--- a/src/lib/models/providers/ollama/ollamaLLM.ts
+++ b/src/lib/models/providers/ollama/ollamaLLM.ts
@@ -92,7 +92,9 @@ class OllamaLLM extends BaseLLM<OllamaConfig> {
         temperature:
           input.options?.temperature ?? this.config.options?.temperature ?? 0.7,
         num_predict: input.options?.maxTokens ?? this.config.options?.maxTokens,
-        num_ctx: 32000,
+        num_ctx:
+          input.options?.contextWindowSize ??
+          this.config.options?.contextWindowSize,
         frequency_penalty:
           input.options?.frequencyPenalty ??
           this.config.options?.frequencyPenalty,
@@ -105,15 +107,15 @@ class OllamaLLM extends BaseLLM<OllamaConfig> {
     });
 
     return {
-      content: res.message.content,
+      content: res.message?.content ?? '',
       toolCalls:
-        res.message.tool_calls?.map((tc) => ({
+        res.message?.tool_calls?.map((tc) => ({
           id: crypto.randomUUID(),
           name: tc.function.name,
           arguments: tc.function.arguments,
         })) || [],
       additionalInfo: {
-        reasoning: res.message.thinking,
+        reasoning: res.message?.thinking,
       },
     };
   }
@@ -146,7 +148,9 @@ class OllamaLLM extends BaseLLM<OllamaConfig> {
         top_p: input.options?.topP ?? this.config.options?.topP,
         temperature:
           input.options?.temperature ?? this.config.options?.temperature ?? 0.7,
-        num_ctx: 32000,
+        num_ctx:
+          input.options?.contextWindowSize ??
+          this.config.options?.contextWindowSize,
         num_predict: input.options?.maxTokens ?? this.config.options?.maxTokens,
         frequency_penalty:
           input.options?.frequencyPenalty ??
@@ -161,9 +165,9 @@ class OllamaLLM extends BaseLLM<OllamaConfig> {
 
     for await (const chunk of stream) {
       yield {
-        contentChunk: chunk.message.content,
+        contentChunk: chunk.message?.content ?? '',
         toolCallChunk:
-          chunk.message.tool_calls?.map((tc, i) => ({
+          chunk.message?.tool_calls?.map((tc, i) => ({
             id: crypto
               .createHash('sha256')
               .update(
@@ -175,7 +179,7 @@ class OllamaLLM extends BaseLLM<OllamaConfig> {
           })) || [],
         done: chunk.done,
         additionalInfo: {
-          reasoning: chunk.message.thinking,
+          reasoning: chunk.message?.thinking,
         },
       };
     }
diff --git a/src/lib/models/providers/openai/openaiLLM.ts b/src/lib/models/providers/openai/openaiLLM.ts
index 5ae1538a0..5ec65cf70 100644
--- a/src/lib/models/providers/openai/openaiLLM.ts
+++ b/src/lib/models/providers/openai/openaiLLM.ts
@@ -102,9 +102,9 @@ class OpenAILLM extends BaseLLM<OpenAIConfig> {
 
     if (response.choices && response.choices.length > 0) {
       return {
-        content: response.choices[0].message.content!,
+        content: response.choices[0].message?.content ?? '',
         toolCalls:
-          response.choices[0].message.tool_calls
+          response.choices[0].message?.tool_calls
             ?.map((tc) => {
               if (tc.type === 'function') {
                 return {
diff --git a/src/lib/models/types.ts b/src/lib/models/types.ts
index 8abefd70a..8b27b0be8 100644
--- a/src/lib/models/types.ts
+++ b/src/lib/models/types.ts
@@ -35,6 +35,7 @@ type GenerateOptions = {
   stopSequences?: string[];
   frequencyPenalty?: number;
   presencePenalty?: number;
+  contextWindowSize?: number;
 };
 
 type Tool = {
diff --git a/src/lib/searxng.ts b/src/lib/searxng.ts
index a0bcd8355..d9dd7e8e9 100644
--- a/src/lib/searxng.ts
+++ b/src/lib/searxng.ts
@@ -39,10 +39,22 @@ export const searchSearxng = async (
   }
 
   const res = await fetch(url);
-  const data = await res.json();
 
-  const results: SearxngSearchResult[] = data.results;
-  const suggestions: string[] = data.suggestions;
+  if (!res.ok) {
+    throw new Error(
+      `SearXNG returned status ${res.status} for query: ${query}`,
+    );
+  }
+
+  let data;
+  try {
+    data = await res.json();
+  } catch {
+    throw new Error(`SearXNG returned non-JSON response for query: ${query}`);
+  }
+
+  const results: SearxngSearchResult[] = data.results ?? [];
+  const suggestions: string[] = data.suggestions ?? [];
 
   return { results, suggestions };
 };