Function getLSPDiagnosticAttachments

src/utils/attachments.ts:2883–2935

* Get LSP diagnostic attachments from passive LSP servers. * Follows the AsyncHookRegistry pattern for consistent async attachment delivery.

(
  toolUseContext: ToolUseContext,
)

 * Follows the AsyncHookRegistry pattern for consistent async attachment delivery.
 */
async function getLSPDiagnosticAttachments(
  toolUseContext: ToolUseContext,
): Promise<Attachment[]> {
  // LSP diagnostics are only useful if the agent has the Bash tool to act on them
  if (
    !toolUseContext.options.tools.some(t => toolMatchesName(t, BASH_TOOL_NAME))
  ) {
    return []
  }

  logForDebugging('LSP Diagnostics: getLSPDiagnosticAttachments called')

  try {
    const diagnosticSets = checkForLSPDiagnostics()

    if (diagnosticSets.length === 0) {
      return []
    }

    logForDebugging(
      `LSP Diagnostics: Found ${diagnosticSets.length} pending diagnostic set(s)`,
    )

    // Convert each diagnostic set to an attachment
    const attachments: Attachment[] = diagnosticSets.map(({ files }) => ({
      type: 'diagnostics' as const,
      files,
      isNew: true,
    }))

    // Clear delivered diagnostics from registry to prevent memory leak
    // Follows same pattern as removeDeliveredAsyncHooks
    if (diagnosticSets.length > 0) {
      clearAllLSPDiagnostics()
      logForDebugging(
        `LSP Diagnostics: Cleared ${diagnosticSets.length} delivered diagnostic(s) from registry`,
      )
    }

    logForDebugging(
      `LSP Diagnostics: Returning ${attachments.length} diagnostic attachment(s)`,
    )

    return attachments
  } catch (error) {
    const err = toError(error)
    logError(
      new Error(`Failed to get LSP diagnostic attachments: ${err.message}`),
    )
    // Return empty array to allow other attachments to proceed
    return []
  }
}

export async function* getAttachmentMessages(
  input: string | null,