cilly — Architecture Notes (EN)RSS feed of articles on engineering and design philosophy.https://cilly-yllic.github.io/enGenerating every Firebase layer’s types from a single contract.ymlhttps://cilly-yllic.github.io/en/notes/firebase-gcp/contract-driven-firebase-codegen/https://cilly-yllic.github.io/en/notes/firebase-gcp/contract-driven-firebase-codegen/Structurally eliminating the drift of maintaining the same model across Data Connect, Firestore, Zod, and API DTOs, with code generation from a YAML contract as the single source of truth.Sun, 19 Jul 2026 00:00:00 GMTfirebase-gcpEnforce with config, not attention — scope and permission guardrails for coding agentshttps://cilly-yllic.github.io/en/notes/ai-agents/scope-and-permission-guardrails-for-coding-agents/https://cilly-yllic.github.io/en/notes/ai-agents/scope-and-permission-guardrails-for-coding-agents/Enforcing multi-repository AI agent work through declared scopes and permissions: per-session guardrail design, a self-restraint that keeps the agent away from its own permission definitions, and a double lock on push.Tue, 30 Jun 2026 00:00:00 GMTai-agentsSyncing what comes after provisioning — Cloudflare DNS, Logto, cert-gated proxy, env bundleshttps://cilly-yllic.github.io/en/notes/firebase-gcp/platform-sync-dns-logto-proxy-env/https://cilly-yllic.github.io/en/notes/firebase-gcp/platform-sync-dns-logto-proxy-env/The design of a CI pipeline that keeps DNS, auth, delivery certificates, and env values — everything left over after config-driven GCP / Firebase provisioning — following the same source of truth.Tue, 30 Jun 2026 00:00:00 GMTfirebase-gcpProvisioning GCP / Firebase environments from a single settings.ymlhttps://cilly-yllic.github.io/en/notes/firebase-gcp/config-driven-gcp-firebase-provisioning/https://cilly-yllic.github.io/en/notes/firebase-gcp/config-driven-gcp-firebase-provisioning/The design of a platform that chains GCP project creation through Firebase setup, keyless, with a per-service settings file as the source of truth.Wed, 24 Jun 2026 00:00:00 GMTfirebase-gcpRuntime and delivery of a multi-service Firebase environmenthttps://cilly-yllic.github.io/en/notes/firebase-gcp/multi-service-firebase-runtime-and-delivery/https://cilly-yllic.github.io/en/notes/firebase-gcp/multi-service-firebase-runtime-and-delivery/A development environment with multiple services sharing one GCP project, presented through two cross-sections: how it runs (runtime) and how it ships (delivery).Wed, 24 Jun 2026 00:00:00 GMTfirebase-gcpTreating Firestore as a public cachehttps://cilly-yllic.github.io/en/notes/firebase-gcp/firestore-as-public-cache/https://cilly-yllic.github.io/en/notes/firebase-gcp/firestore-as-public-cache/The design benefits — and the costs — that come into view when Cloud SQL is the source of truth and Firestore is a read-optimized projection.Wed, 27 May 2026 00:00:00 GMTfirebase-gcp