[deps-release-notes] mcpg v0.3.26 action items #1059

Release Notes Action Items for mcpg 0.3.25 → 0.3.26

This issue summarizes upstream release notes for the mcpg dependency between the previously pinned version (0.3.25) and the new pinned version (0.3.26), highlighting items that may need follow-up in ado-aw.

The companion version-bump PR is titled chore(deps): update MCPG_VERSION to 0.3.26.

Releases analyzed

• v0.3.26

Notable features for ado-aw to adopt

• OTLP multi-endpoint fan-out via GH_AW_OTLP_ENDPOINTS (v0.3.26): feat: OTLP multi-endpoint fan-out via GH_AW_OTLP_ENDPOINTS — the MCP gateway now supports sending OTel telemetry to multiple OTLP endpoints simultaneously via the GH_AW_OTLP_ENDPOINTS environment variable. ado-aw could expose this in compiled pipeline variables to allow consumers to route agent telemetry to additional observability backends.

Deprecations

• MCP_GATEWAY_API_KEY deprecated in favor of MCP_GATEWAY_AGENT_ID (v0.3.26): fix(run.sh): use MCP_GATEWAY_AGENT_ID with deprecated fallback for MCP_GATEWAY_API_KEY — the MCPG runtime entrypoint now reads MCP_GATEWAY_AGENT_ID as the primary env var (with a deprecated fallback to MCP_GATEWAY_API_KEY). ado-aw currently generates pipelines that set MCP_GATEWAY_API_KEY (see src/compile/agentic_pipeline.rs and src/compile/common.rs). These will continue to work via the fallback, but ado-aw should migrate to emit MCP_GATEWAY_AGENT_ID instead to stay ahead of eventual removal.

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