Method handleWebhook

src/adapters/github.ts:378–491

* Handle incoming webhook event

(
    payload: string,
    signature: string
  )

   * Handle incoming webhook event
   */
  async handleWebhook(
    payload: string,
    signature: string
  ): Promise<void> {
    // 1. Verify signature
    if (!this.verifySignature(payload, signature)) {
      console.error('[GitHub] Invalid webhook signature');
      return;
    }

    // 2. Parse event
    const event: WebhookEvent = JSON.parse(payload);
    const parsed = this.parseEvent(event);
    if (!parsed) return;

    const { owner, repo, number, comment, eventType, issue, pullRequest } = parsed;

    // 3. Check @mention
    if (!this.hasMention(comment)) return;

    console.log(`[GitHub] Processing ${eventType}: ${owner}/${repo}#${number}`);

    // 4. Build conversationId
    const conversationId = this.buildConversationId(owner, repo, number);

    // 5. Check if new conversation
    const existingConv = await db.getOrCreateConversation('github', conversationId);
    const isNewConversation = !existingConv.codebase_id;

    // 6. Get/create codebase (checks for existing first!)
    const { codebase, repoPath, isNew: isNewCodebase } = await this.getOrCreateCodebaseForRepo(
      owner,
      repo
    );

    // 7. Get default branch
    const { data: repoData } = await this.octokit.rest.repos.get({ owner, repo });
    const defaultBranch = repoData.default_branch;

    // 8. Ensure repo ready (clone if needed, sync if new conversation)
    await this.ensureRepoReady(owner, repo, defaultBranch, repoPath, isNewConversation);

    // 9. Auto-load commands if new codebase
    if (isNewCodebase) {
      await this.autoDetectAndLoadCommands(repoPath, codebase.id);
    }

    // 10. Update conversation
    if (isNewConversation) {
      await db.updateConversation(existingConv.id, {
        codebase_id: codebase.id,
        cwd: repoPath,
      });
    }

    // 11. Build message with context
    const strippedComment = this.stripMention(comment);
    let finalMessage = strippedComment;