diff --git a/DEVELOPMENT_PLAN.md b/DEVELOPMENT_PLAN.md
index 9c7651f..6a2c35a 100644
--- a/DEVELOPMENT_PLAN.md
+++ b/DEVELOPMENT_PLAN.md
@@ -79,6 +79,8 @@ Our network analysis revealed that YouTube's web client uses a `POST` request to
         *   **Findings:** `liveChatMessages.list` costs 5 quota points per request, regardless of whether it's for live or replay chat. Frequent polling (e.g., 1 request/second) will exhaust the 10,000 daily quota in about 33 minutes. The method is not designed for efficiently replaying extensive past chat history. There's no indication of different or more lenient quota characteristics for replay usage. This approach does not offer a sustainable, quota-friendly solution for continuous monitoring.
         *   **Status:** **COMPLETED.** Conclusion: Not a sustainable solution for continuous monitoring.
     2.  **Minimal `part` Parameters:** Re-confirm the absolute minimum `part` parameters required for `liveChatMessages.list` to reduce quota cost per call.
+        *   **Findings:** The minimal `part` parameters to retrieve essential chat message information (author's name, message content, and author's unique ID for persistent colors) are `snippet,authorDetails`. This will incur a cost of 5 quota points per request.
+        *   **Status:** **COMPLETED.**
     3.  **Intelligent Polling Refinement:** Explore advanced adaptive polling strategies beyond `pollingIntervalMillis`, potentially incorporating machine learning to predict chat activity and adjust polling frequency.
 
 ## Phase 3: Community Solutions and Open-Source Projects
@@ -100,4 +102,4 @@ Our network analysis revealed that YouTube's web client uses a `POST` request to
 
 **Prioritization:** All research will prioritize **open-source and Linux-compatible solutions**. Compliance with YouTube's Terms of Service remains a critical factor.
 
-**Next Steps:** The findings from this revised research will be compiled into a structured document to inform the design and implementation of a robust YouTube Live Chat monitoring solution.
\ No newline at end of file
+**Next Steps:** The findings from this revised research will be compiled into a structured document to inform the design and implementation of a robust YouTube Live Chat monitoring solution.
diff --git a/PROGRESS_LOG.md b/PROGRESS_LOG.md
index a4ed96e..5f043d3 100644
--- a/PROGRESS_LOG.md
+++ b/PROGRESS_LOG.md
@@ -37,7 +37,19 @@ This document chronicles the key steps, findings, and decisions made during the
     *   **Implications:** Highly fragile (subject to breaking), **critical compliance risk** (violates YouTube's Terms of Service).
 *   **Action:** `DEVELOPMENT_PLAN.md` was updated with these findings.
 
+## Phase 2: Re-exploration of YouTube Data API v3 (Creative Use)
+
+### Action 1: Live Chat Replay API
+*   **Investigation:** Explored `liveChatMessages.list` for replays to assess quota characteristics and suitability for near real-time. 
+*   **Findings:** `liveChatMessages.list` costs 5 quota points per request, regardless of live or replay. Frequent polling exhausts the 10,000 daily quota quickly (approx. 33 mins at 1 req/sec). Not designed for efficient extensive chat history replay. No special quota for replay usage. 
+*   **Conclusion:** Not a sustainable, quota-friendly solution for continuous monitoring.
+
+### Action 2: Minimal `part` Parameters
+*   **Investigation:** Re-confirmed the absolute minimum `part` parameters for `liveChatMessages.list` to reduce quota cost.
+*   **Findings:** The minimal `part` parameters to retrieve essential chat message information (author's name, message content, and author's unique ID for persistent colors) are `snippet,authorDetails`. This will incur a cost of 5 quota points per request.
+*   **Conclusion:** While minimal parameters are identified, the base cost of 5 quota points per request still makes continuous polling unsustainable for the project's goal.
+
 ## Next Steps
 
-*   Proceed with "Integration with `rich` Display" as outlined in `DEVELOPMENT_PLAN.md`.
-*   Continue with other phases of the revised research plan, keeping the compliance and fragility risks of `pytchat` in mind.
+*   Proceed with "Intelligent Polling Refinement" as outlined in `DEVELOPMENT_PLAN.md`.
+*   Continue with other phases of the revised research plan, keeping the compliance and fragility risks of `pytchat` in mind.
\ No newline at end of file