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DOCS: Add GAMMA documentation to Istio integration#636

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lakxy wants to merge 1 commit intokgateway-dev:mainfrom
lakxy:docs/add-gamma-istio-integration
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DOCS: Add GAMMA documentation to Istio integration#636
lakxy wants to merge 1 commit intokgateway-dev:mainfrom
lakxy:docs/add-gamma-istio-integration

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@lakxy lakxy commented Jan 29, 2026

Description

This PR addresses issue #445 by adding comprehensive GAMMA documentation to the Istio integration section.

Motivation: Users need clarity on kGateway's role within the GAMMA initiative and how it differs from a service mesh, particularly when used as a waypoint proxy.

What changed:

  • Added dedicated gamma.md page explaining the GAMMA initiative and kGateway's integration capabilities
  • Updated _index.md with GAMMA section and navigation card for improved discoverability
  • Provided Service parentRefs example demonstrating mesh traffic configuration
  • Clarified that kGateway is an API gateway and ingress controller, not a service mesh
  • Added links to existing waypoint proxy documentation
  • Applied changes to both latest and main documentation versions

Related issues: Closes #445

Change Type

/kind documentation

Changelog

docs: Add GAMMA documentation explaining kGateway's role in service mesh integration and waypoint proxy capabilities

Additional Notes

  • Both envoy/latest/ and envoy/main/ versions updated for consistency
  • Navigation weight set to 15 to appear before ambient/waypoint sections
  • Includes YAML example with inline comments for Service parentRefs usage pattern
  • Architecture diagram distinguishes north-south (ingress) vs east-west (mesh) traffic flows

Add dedicated gamma.md page and section explaining GAMMA initiative,
clarify kGateway's role as API gateway (not service mesh), document
waypoint proxy integration, and provide Service parentRefs examples

Signed-off-by: Lakshya Saxena <suntiwari3495@gmail.com>
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lakxy commented Jan 29, 2026

/cc @npolshakova
/cc @AryanParashar24

I have verified all the information mentioned in this PR's diff, Ready for review!

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GAMMA definition section in the Istio integration section

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