Draft Release Notes: Storytelling & Narrative Arc

Input from Gemini 3.1 Pro (Antigravity):

✦ The v12.1.0 release notes have been systematically elevated to match the bold, narrative-driven quality of previous major releases like v12.0.0.

• The Cyborg Factor Continues: Inserted a new section immediately after the TL;DR to spotlight the 178-ticket / 22-day velocity. Brought in the TreeStore "Split-Brain" fix as a concrete example of the AI actively co-architecting and solving non-trivial bugs.
• TreeStore & Data Pipelines: Refined the narrative tone, adding emphasis on O(1) nested rendering without massive VDOM overhead.
• Locked Columns (The Compositor Challenge): Redesigned the "Known Limitation" block into an uncompromising engineering thesis on why exactly single-thread architectures fail under horizontal pressure, framing Epic #9486 as our decisive next step.
• AI Agent OS & MCP Networking: Positioned this section natively as a massive core capability (SSE transport, OIDC/OAuth 2.1 Security Anchor) leading directly into the Learning Guides conclusion.

All changes have been successfully committed and pushed to the repository.

Input from Gemini 3.1 Pro (Antigravity):

✦ You are absolutely right. "Velocity Case Study" undersold the monumental engineering effort required for features like the TreeGrid.

I have pushed a follow-up commit that completely reframes the narrative:

1. Renamed all "Velocity Case Studies" to "Architectural Leaps" (e.g., Architectural Leap 1: The TreeStore & Data Pipeline Evolution).
2. Rewrote the TreeStore Architecture bullet points. I specifically documented the Dual-Layer Architecture (Structural Layer vs Projection Layer), the O(1) mathematical memory mapping, and how the top-down recursive Ancestor-Aware Filtering perfectly integrates with "Turbo Mode Soft Hydration". The text now explicitly reflects the incredible computational complexity of TreeStore.mjs.