[Syspretor]

Summary

• Add MODEL_EXPRESS_URL environment variable to all 4 Dynamo inference examples (agg.yaml, agg-multi-nodes.yaml, pd-disagg.yaml, pd-disagg-multi-nodes.yaml)
• Add Model Express server deployment instructions (Helm chart and manual) to the prerequisites section of each example
• Add inline comments explaining Model Express functionality, fallback behavior, and project link

Context

Model Express is Dynamo's accelerated model distribution service that coordinates P2P model weight transfers (GPU-to-GPU via NIXL RDMA) across nodes. When using the Dynamo Operator, MODEL_EXPRESS_URL is automatically injected into all pods. However, RBG deployments bypass the Dynamo Operator, so users need to configure this manually in their RBG YAML files.

Test plan

• Verify YAML syntax is valid for all 4 modified example files
• Confirm examples deploy correctly with and without Model Express server

🤖 Generated with Claude Code

[gemini-code-assist]

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[cheyang]

Looks good overall. Clean documentation addition — consistent across all four Dynamo example YAMLs, well-commented, and non-breaking by design (graceful fallback when MX Server is unavailable).

What was reviewed:

• Documentation accuracy and completeness of Model Express integration instructions
• Consistency across agg.yaml, agg-multi-nodes.yaml, pd-disagg.yaml, pd-disagg-multi-nodes.yaml
• Env var placement and naming conventions
• CI status (all green)

Minor observation (non-blocking):
MODEL_EXPRESS_URL lives in commonTemplate, which means it propagates to all roles including the processor/router that doesn't download models. This is perfectly harmless (the var is simply ignored by non-downloading components), and for example YAMLs the simplicity trade-off makes sense. Just flagging for awareness.

LGTM — ready to merge.

[cheyang]

LGTM. Docs-only change, consistent structure across all example YAMLs, all CI green.