chore(web): Add selectedReposCount property to wa_chat_message_sent posthog event (#941)

* feat: add selectedReposCount to wa_chat_message_sent event

- Add selectedReposCount field to wa_chat_message_sent event type
- Include selectedReposCount in chat message events for both streaming and blocking endpoints
- This provides analytics on how many repositories users select when asking questions

Co-authored-by: Brendan Kellam <brendan@sourcebot.dev>

* chore: add changelog entry for selectedReposCount in wa_chat_message_sent

Co-authored-by: Brendan Kellam <brendan-kellam@users.noreply.github.com>

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Brendan Kellam <brendan-kellam@users.noreply.github.com>

Author: 3 people

CHANGELOG.md

@@ -14,8 +14,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `wa_user_created` PostHog event fired on successful user sign-up. [#933](https://github.com/sourcebot-dev/sourcebot/pull/933)
 - Added `wa_askgh_login_wall_prompted` PostHog event fired when an unauthenticated user attempts to ask a question on Ask GitHub. [#933](https://github.com/sourcebot-dev/sourcebot/pull/933)
 - Added Bitbucket Server (Data Center) OAuth 2.0 SSO identity provider support (`provider: "bitbucket-server"`). [#934](https://github.com/sourcebot-dev/sourcebot/pull/934)
-- Added Bitbucket Server (Data Center) sync all repositories support. [#927](https://github.com/sourcebot-dev/sourcebot/pull/927)
-- Added permission syncing support for Bitbucket Server (Data Center), including account-driven and repo-driven sync. [#938](https://github.com/sourcebot-dev/sourcebot/pull/938)
+- Added `selectedReposCount` to the `wa_chat_message_sent` PostHog event to track the number of selected repositories when users ask questions. [#941](https://github.com/sourcebot-dev/sourcebot/pull/941)
+
 
 ### Changed
 - Hide version upgrade toast for askgithub deployment (`EXPERIMENT_ASK_GH_ENABLED`). [#931](https://github.com/sourcebot-dev/sourcebot/pull/931)

packages/web/src/app/api/(server)/chat/blocking/route.ts

@@ -164,6 +164,7 @@ export const POST = apiHandler(async (request: NextRequest) => {
             await captureEvent('wa_chat_message_sent', {
                 chatId: chat.id,
                 messageCount: 1,
+                selectedReposCount: selectedRepos.length,
                 ...(env.EXPERIMENT_ASK_GH_ENABLED === 'true' ? {
                     selectedRepos: selectedRepos.map(r => r.value)
                 } : {}),

packages/web/src/app/api/(server)/chat/route.ts

@@ -103,6 +103,7 @@ export const POST = apiHandler(async (req: NextRequest) => {
             await captureEvent('wa_chat_message_sent', {
                 chatId: id,
                 messageCount: messages.length,
+                selectedReposCount: expandedRepos.length,
                 ...(env.EXPERIMENT_ASK_GH_ENABLED === 'true' ? { selectedRepos: expandedRepos } : {}),
             } );
 

packages/web/src/lib/posthogEvents.ts

@@ -157,6 +157,7 @@ export type PosthogEventMap = {
     wa_chat_message_sent: {
         chatId: string,
         messageCount: number,
+        selectedReposCount: number,
         /**
          * @note this field will only be populated when
          * the EXPERIMENT_ASK_GH_ENABLED environment variable