docs: scaffold tensor parallelism optimization blog post

Adds a placeholder page and Tech Blogs navigation section so the TP
optimization write-up has a home before the content lands.

Author: shljessie

docs/blog/tensor-parallelism-optimization.md

@@ -0,0 +1,27 @@
+# Optimizing Tensor Parallelism in JAX and XLA
+
+> **Draft** — this page is a placeholder. Content is in progress.
+
+## Background
+
+<!-- Why TP matters: model sizes past single-GPU memory, the compute/communication
+     tradeoff versus FSDP and pipeline parallelism. -->
+
+## Where tensor parallelism costs performance
+
+<!-- All-gather / reduce-scatter on the critical path, exposed communication,
+     small GEMM tiles at high TP degree, NVLink versus inter-node bandwidth. -->
+
+## Optimizations
+
+<!-- One subsection per optimization, with the mechanism and how to enable it. -->
+
+## Results
+
+<!-- Model, hardware, TP degrees swept, throughput and step-time deltas. -->
+
+## Reproducing
+
+<!-- Container tag, framework config flags, launch command. -->
+
+## Takeaways

docs/index.yml

@@ -55,6 +55,12 @@ navigation:
       - page: nsys-jax
         path: nsys-jax.md
 
+  # ==================== Tech Blogs ====================
+  - section: Tech Blogs
+    contents:
+      - page: Optimizing Tensor Parallelism in JAX and XLA
+        path: blog/tensor-parallelism-optimization.md
+
   # ==================== Resiliency ====================
   - section: Resiliency
     contents: