feat: add Fetch and Sequential Thinking MCP sidecars

Add two new MCP (Model Context Protocol) sidecars to enable web content fetching
and structured problem-solving capabilities:

- **Fetch MCP**: Web content fetching and HTML to markdown conversion on port 8082
- **Sequential Thinking MCP**: Structured thinking and problem-solving processes on port 8083

Both sidecars are enabled by default and use the official MCP Docker images
(mcp/fetch and mcp/sequentialthinking) with fastmcp SSE transport.

Changes:
- Add fetch and sequentialthinking sidecars to values.yaml
- Add sidecar containers to deployment.yaml template
- Update .mcp.json with new server endpoints
- Update CLAUDE.md documentation with new sidecar details

Closes #43, #44

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

chart/templates/deployment.yaml

@@ -166,6 +166,48 @@ spec:
           resources:
             {{- toYaml .Values.mcp.sidecars.flux.resources | nindent 12 }}
         {{- end }}
+        {{- if .Values.mcp.sidecars.fetch.enabled }}
+        - name: fetch-mcp
+          image: "{{ .Values.mcp.sidecars.fetch.image.repository }}:{{ .Values.mcp.sidecars.fetch.image.tag }}"
+          imagePullPolicy: Always
+          command: ["fastmcp", "run", "--transport", "sse", "--host", "0.0.0.0", "--port", "{{ .Values.mcp.sidecars.fetch.port }}"]
+          ports:
+            - name: fetch
+              containerPort: {{ .Values.mcp.sidecars.fetch.port }}
+          livenessProbe:
+            tcpSocket:
+              port: {{ .Values.mcp.sidecars.fetch.port }}
+            initialDelaySeconds: 10
+            periodSeconds: 10
+          readinessProbe:
+            tcpSocket:
+              port: {{ .Values.mcp.sidecars.fetch.port }}
+            initialDelaySeconds: 5
+            periodSeconds: 5
+          resources:
+            {{- toYaml .Values.mcp.sidecars.fetch.resources | nindent 12 }}
+        {{- end }}
+        {{- if .Values.mcp.sidecars.sequentialthinking.enabled }}
+        - name: sequentialthinking-mcp
+          image: "{{ .Values.mcp.sidecars.sequentialthinking.image.repository }}:{{ .Values.mcp.sidecars.sequentialthinking.image.tag }}"
+          imagePullPolicy: Always
+          command: ["fastmcp", "run", "--transport", "sse", "--host", "0.0.0.0", "--port", "{{ .Values.mcp.sidecars.sequentialthinking.port }}"]
+          ports:
+            - name: sequentialthinking
+              containerPort: {{ .Values.mcp.sidecars.sequentialthinking.port }}
+          livenessProbe:
+            tcpSocket:
+              port: {{ .Values.mcp.sidecars.sequentialthinking.port }}
+            initialDelaySeconds: 10
+            periodSeconds: 10
+          readinessProbe:
+            tcpSocket:
+              port: {{ .Values.mcp.sidecars.sequentialthinking.port }}
+            initialDelaySeconds: 5
+            periodSeconds: 5
+          resources:
+            {{- toYaml .Values.mcp.sidecars.sequentialthinking.resources | nindent 12 }}
+        {{- end }}
         {{- if .Values.mcp.sidecars.homeassistant.enabled }}
         - name: homeassistant-mcp
           image: "{{ .Values.mcp.sidecars.homeassistant.image.repository }}:{{ .Values.mcp.sidecars.homeassistant.image.tag }}"

chart/values.yaml

@@ -108,6 +108,36 @@ mcp:
           memory: "256Mi"
           cpu: "500m"
 
+    # Web content fetching capabilities
+    fetch:
+      enabled: true
+      image:
+        repository: mcp/fetch
+        tag: latest
+      port: 8082
+      resources:
+        requests:
+          memory: "64Mi"
+          cpu: "50m"
+        limits:
+          memory: "256Mi"
+          cpu: "500m"
+
+    # Sequential thinking and problem-solving
+    sequentialthinking:
+      enabled: true
+      image:
+        repository: mcp/sequentialthinking
+        tag: latest
+      port: 8083
+      resources:
+        requests:
+          memory: "64Mi"
+          cpu: "50m"
+        limits:
+          memory: "256Mi"
+          cpu: "500m"
+
     # Home Assistant smart home control
     homeassistant:
       enabled: false  # Requires HOMEASSISTANT_URL and HOMEASSISTANT_TOKEN