## Task

Evaluate this code review comment. Read the source file and determine if the issue is valid.

**Instructions:**
1. Read the file mentioned in the review: `packages/core/ai_content_pipeline/ai_content_pipeline/cli/stream.py`
2. Check line 108 and surrounding context
3. Determine if the review feedback is valid
4. If valid: Fix the issue in the code
5. If invalid: Explain why the feedback doesn't apply

**Important:** Be concise. Either fix the code or explain in 2-3 sentences why it's not applicable.

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# Review Comment

- **Author:** coderabbitai[bot]
- **File:** `packages/core/ai_content_pipeline/ai_content_pipeline/cli/stream.py`
- **Line:** 108
- **Date:** 2026-02-07
- **Comment ID:** 2777111276
- **URL:** https://github.com/donghaozhang/video-agent-skill/pull/20#discussion_r2777111276

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_⚠️ Potential issue_ | _🟠 Major_

**Add return type hints and full Google-style docstrings to public emitter methods.**

Please add explicit return type hints (e.g., `-> None`) for all public methods and update docstrings to Google style with Args/Returns/Cost/Example sections.

As per coding guidelines: “All public methods in generator classes and test files must include type hints for parameters and return values”, “All public methods should include docstrings with Args, Returns, Cost information, and Example sections”, and “Write docstrings for every function using Google style format”.
