Feature Request: Include output delta in tool_progress events for Agent SDK (small fix)

Summary

When using the Claude Agent SDK, tool_progress events for Bash tool execution only include elapsed_time_seconds but not the actual output content. The output is already being streamed internally (as bash_progress events with output and fullOutput fields), but this data isn't exposed to SDK consumers.

Current Behavior

SDK consumers receive tool_progress events like:

{
  type: "tool_progress",
  tool_use_id: "...",
  tool_name: "Bash",
  elapsed_time_seconds: 5.2,
  // No output content!
}

Desired Behavior

Include the output delta in tool_progress events:

{
  type: "tool_progress",
  tool_use_id: "...",
  tool_name: "Bash",
  elapsed_time_seconds: 5.2,
  output: "Building project...\n",  // Delta chunk
  total_lines: 42
}

Why This Matters

• Real-time feedback: SDK consumers (like custom UIs, monitoring tools) can show live command output instead of waiting for completion
• Better UX: Long-running commands feel more responsive when users see progress
• Parity with CLI: The Claude Code CLI already displays streaming output internally - this just exposes it to SDK consumers

Technical Details

Looking at the code, the internal bash_progress event already contains the output:

// Internal event (line ~476437)
{
  type: "bash_progress",
  output: _A.output,           // ← Already available!
  fullOutput: _A.fullOutput,
  elapsedTimeSeconds: _A.elapsedTimeSeconds,
  totalLines: _A.totalLines
}

But when converted for SDK output, the output fields are omitted:

// SDK output (line ~457906)
yield {
  type: "tool_progress",
  elapsed_time_seconds: A.data.elapsedTimeSeconds,
  // output not included
}

The fix is literally adding output: A.data.output to the yield statement.

There's also a check that only emits progress in remote/container mode (CLAUDE_CODE_REMOTE or CLAUDE_CODE_CONTAINER_ID) - it would be great to enable this for local SDK usage too.

Environment

• Claude Code version: 2.1.4
• Using: Claude Agent SDK (TypeScript)

Thank you for considering this enhancement!