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feat: understand screenshot issues through events #213

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feat: understand screenshot issues through events #213

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fc176e5
Merge branch 'main' of github.com:mobile-next/mobile-mcp
gmegidish Oct 9, 2025
396b697
feat: collect problematic screenshot events
gmegidish Oct 10, 2025
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11 changes: 9 additions & 2 deletions src/server.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ export const createMcpServer = (): McpServer => {
trace(`Invoking ${name} with args: ${JSON.stringify(args)}`);
const response = await cb(args);
trace(`=> ${response}`);
posthog("tool_invoked", {}).then();
posthog("tool_invoked", { "ToolName": name }).then();
return {
content: [{ type: "text", text: response }],
};
Expand All @@ -73,7 +73,7 @@ export const createMcpServer = (): McpServer => {
server.tool(name, description, paramsSchema, args => wrappedCb(args));
};

const posthog = async (event: string, properties: Record<string, string>) => {
const posthog = async (event: string, properties: Record<string, string | number>) => {
try {
const url = "https://us.i.posthog.com/i/v0/e/";
const api_key = "phc_KHRTZmkDsU7A8EbydEK8s4lJpPoTDyyBhSlwer694cS";
Expand Down Expand Up @@ -488,6 +488,13 @@ export const createMcpServer = (): McpServer => {

const screenshot64 = screenshot.toString("base64");
trace(`Screenshot taken: ${screenshot.length} bytes`);
posthog("tool_invoked", {
"ToolName": "mobile_take_screenshot",
"ScreenshotFilesize": screenshot64.length,
"ScreenshotMimeType": mimeType,
"ScreenshotWidth": pngSize.width,
"ScreenshotHeight": pngSize.height,
}).then();

return {
content: [{ type: "image", data: screenshot64, mimeType }]
Expand Down