2025-03 Monthly Summary for wundergraph/cosmo-docs Key features delivered: - Prometheus metrics now include a new configuration option to exclude scope information, reducing cardinality and enabling more scalable metric collection. Documentation has been updated to reflect this capability. Major bugs fixed: - No major bugs fixed this month; feature delivery and documentation updates completed as planned. Overall impact and accomplishments: - Provides customers with greater control over Prometheus metric cardinality, improving observability while reducing storage and query load on monitoring backends. - Demonstrates end-to-end delivery: design of a configuration option, implementation, and documentation, with full traceability to commit 8d24e2c4699eee7367d4c10a5289bde6fe24d461 (GITBOOK-987: ENG-6570). Technologies/skills demonstrated: - Prometheus metrics configuration, feature design, and schema considerations. - Documentation engineering and release notes alignment. - Cross-repo traceability and commit-level accountability.

February 2025 — WunderGraph Cosmo Docs: Delivered operator-focused features to improve performance, reliability, and configurability, with documentation updates to reduce onboarding time and risk. Three features were implemented and documented, backed by targeted commits, delivering tangible business value. Key features delivered: - Subgraph Connection Limits Configurability: YAML-configurable max_idle_conns, max_conns_per_host, and max_idle_conns_per_host for subgraph requests; docs updated for operators to tune performance and resource usage. (Commits: GITBOOK-940/ENG-6338; reference: e25e225f1a1138aab73012f2c5f57c6fc2e79bb8) - Cookie Whitelist for Header Propagation: Added cookie_whitelist option to control which cookies are forwarded to subgraphs; includes YAML example and early-request lifecycle clarification for custom modules. (Commits: GITBOOK-970/ENG-6336 and GITBOOK-972; references: b9b1577afcce60037918c80cfc90e55127315e28; c5b9ca85394bae43323c8e6924aca069f2dd96da) - Router Compatibility Flags and HTTP Error Reporting Documentation: Documented Apollo Router Compatibility Flags (e.g., replace_invalid_var_errors); added environment variable to enable subgraph HTTP error reporting; removed an outdated warning in README. (Commits: GITBOOK-961/ENG-6446; GITBOOK-964/ENG-6445; GITBOOK-955; references: f287f85a75661bf7eb5a277fc8713e4f5b8eda0e; 5e8e80ac90ced64134a7d4b83e0554b746d4f0cb; ecd765a737780413b133da8df917e590149bfd30) Major bugs fixed: - No major bugs fixed this month; the focus was on feature delivery and operator-facing documentation to reduce misconfigurations and improve observability. Overall impact and accomplishments: - Improved operability: operators can fine-tune performance and resource usage through YAML-configured limits; increased visibility and control over cookie handling and error reporting; clearer guidance on router features and compatibility. - Strengthened reliability: early cookie handling and explicit error reporting pathways reduce surprises in production routing. Technologies/skills demonstrated: - YAML-based configuration, environment-variable controls, and documentation discipline. - API/router compatibility awareness and observability improvements. - Cross-functional collaboration evidenced by integrated doc work and feature commits.