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[deps-release-notes] mcpg v0.3.18 action items #716

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Release Notes Action Items for mcpg 0.3.120.3.18

This issue summarizes upstream release notes for the mcpg dependency between the previously pinned version (0.3.12) and the new pinned version (0.3.18), highlighting items that may need follow-up in ado-aw.

The companion version-bump PR is titled chore(deps): update MCPG_VERSION to 0.3.18.

Releases analyzed

Notable features for ado-aw to adopt

  • Sentry OTLP export support and sentry.io network allowlist (v0.3.13): mcpg added Sentry OTLP telemetry export and a corresponding sentry.io network allowlist entry. ado-aw maintains its own network allowlist (src/data/ecosystem_domains.json and src/allowed_hosts.rs); if mcpg's Sentry OTLP export is used in production pipelines, ado-aw may need to expose sentry.io as an allowed host for consumers wishing to capture mcpg traces.
  • OTEL_EXPORTER_OTLP_HEADERS env var fallback for OTLP export headers (v0.3.13): mcpg now reads this standard env var as a fallback. If ado-aw passes environment variables through to mcpg, consumers can configure OTLP export via this env var without modifying mcpg config.
  • OTLP endpoint path fixed to append /v1/traces per spec (v0.3.15): fix(tracing): append /v1/traces to OTLP endpoint per spec. Consumers relying on ado-aw-generated pipelines with OTLP tracing should verify their endpoint configuration after this fix.
  • gen_ai semantic conventions alignment for OTel span attributes (v0.3.16): feat(tracing): align span attributes with gen_ai semantic conventions. Consumers relying on specific OTel attribute names from mcpg (e.g. for dashboards or alerting) should verify compatibility with this attribute rename.
  • WASM guard hardening: oversized call_backend responses handled via size-hint protocol (v0.3.18): The wazero-based guard runtime now handles large responses more reliably with larger I/O buffers and improved cache reconfiguration locking.

This issue was opened automatically by the dependency version updater workflow.

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