stack-cloudflare

Cloudflare Stack — Team Briefing

This is a knowledge overlay, not a new specialist. The existing ETYB team does the work — backend-architect writes the backend code, devops-engineer wires the deploys, security-engineer enforces the boundary. This pack tells each role where the current Cloudflare knowledge lives.

Where the full briefing lives

The full Stack briefing lives in this same folder. Per-product and per-role pages are siblings of this SKILL.md. Every page carries last_verified_on stamps and authoritative-source URLs in its frontmatter; see skills/etyb/core/knowledge-currency.md for the drift-check protocol that uses them.

• Stack briefing: stacks/cloudflare/index.md
• Per-product pages: stacks/cloudflare/<product>.md — one per entry in products_covered above
• Per-role views: stacks/cloudflare/<role>.md — one per role in applies_to_roles above

When ETYB is installed locally these are read directly from disk. For third-party agents without the install, the same content is reachable as raw markdown at https://raw.githubusercontent.com/e-t-y-b/etyb-skills/main/stacks/cloudflare/<page>.md.

When delegate_to_skills (frontmatter above) lists a first-party vendor MCP/skill that's installed in the user's environment, ETYB defers to it first. The in-repo Stack content is the curated fallback.

What changed in 2025-2026 that older training data misses

Critical context — an LLM with a 2024 cutoff will get these wrong:

• Workers RPC is the canonical inter-worker pattern. Service bindings that did env.OTHER.fetch(request) are legacy. Modern bindings use WorkerEntrypoint classes and method calls (await env.OTHER.someMethod(args)). RPC traverses Workers, Durable Objects, and Workers for Platforms — same primitive.
• Durable Objects are SQLite-backed by default. New DO classes get a per-DO SQLite database, not the legacy KV-style storage. Transactions, full SQL, alarms, and ~10GB per DO are standard. Old DO storage API (this.state.storage.put/get) still works but new code should use SQL.
• D1 supports global read replication and the Sessions API. Multi-region read replicas as of 2025; the Sessions API ensures read-your-writes consistency across replicas. Don't build D1 apps that assume a single primary location anymore.
• Hyperdrive supports MySQL in addition to Postgres, and can target private databases over Cloudflare Tunnel. It is now the standard way to put a relational DB behind Workers — connection pooling + query caching + private connectivity in one binding.
• Vectorize V2 is the current generation: up to 1536-dim (and larger for some plans), metadata indexes for filtered search, multi-million-vector indexes per account, namespace partitioning. v1 indexes still exist but new builds should target V2.
• Workflows GA'd in 2025. Durable-execution primitive (think Temporal-as-a-binding). Long-running, retry-aware, sleepable. New mental model for orchestrating async work — don't reach for Queues + state-in-DO when Workflows fit.
• Pages is in maintenance mode. New projects should use Workers Static Assets with the assets binding. Pages keeps working; new platform features land in Workers Static Assets first.
• AutoRAG was renamed to Cloudflare AI Search in 2025. Same product (managed RAG pipeline on R2 + Vectorize + Workers AI).
• Realtime (TURN + SFU + Realtime API) is GA. Replaces the older "Cloudflare Calls" naming. Real-time audio/video apps on Workers without managing your own SFU.
• Containers on Workers (beta through 2025) lets a Worker spawn a long-running container for heavy or stateful workloads — bridges the gap to Node/Python apps that don't fit the V8-isolate model.
• Wrangler v4 is current. wrangler deploy (not publish), wrangler dev (with --remote), wrangler tail, wrangler types, wrangler secret bulk. Old wrangler publish and Wrangler v1/v2 syntax must be flagged and replaced.
• compatibility_date + compatibility_flags are mandatory. Without them the runtime falls back to old behavior. New projects should pin compatibility_date near current and set nodejs_compat or nodejs_compat_v2 if needed.