Source: https://internal-agents.com/agents/cloudflare-ai-stack # Cloudflare — Internal AI engineering stack Cloudflare's Dev Productivity team runs an internal AI engineering stack built on the company's own products. It puts MCP servers behind one OAuth portal, routes every model request through a gateway, and generates context files across thousands of repos. Every merge request gets an automated multi-agent review. > This entry describes supporting infrastructure that other work builds on. The catalog classifies it as a platform. The record also reports a workflow. - Approach type: Platform - Deployment stage: Scaled - Autonomy: Drafts reviewed - Evidence strength: Detailed primary - Status: Internal - First reported year: 2026 - Work: Coding, Code review - Interfaces: Cli, Ci, Web - Invocation: Event driven, Interactive - Entry reviewed: 2026-09-15 ## Where people stay involved - **pull request → AI review findings** — Work product review · Level 3 ## Overview ### Summary Cloudflare's Dev Productivity team runs an internal AI engineering stack built on the company's own products. It puts MCP servers behind one OAuth portal, routes every model request through a gateway, and generates context files across thousands of repos. Every merge request gets an automated multi-agent review. Fact · Reported · High confidence · `cloudflare-ai-stack--summary` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) - Contextualizes · [2] [Hacker News discussion of Cloudflare's internal AI engineering stack](https://news.ycombinator.com/item?id=47837240) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-2/content.md) ## How it works ### Supporting component One OAuth aggregation point for all MCP tools Fact · Reported · High confidence · `cloudflare-ai-stack--primitives-0` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Supporting component Collapse N tool schemas into 2 calls to hold token overhead constant at scale Fact · Reported · High confidence · `cloudflare-ai-stack--primitives-1` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Supporting component Structured, generated repo context (runtime, nav, conventions, boundaries, deps) Fact · Reported · High confidence · `cloudflare-ai-stack--primitives-2` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Supporting component Multi-agent CI review: risk tiering, specialist agents, Codex-rule citations Fact · Reported · High confidence · `cloudflare-ai-stack--primitives-3` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ## Supervision evidence ### Operating model assessment Level 3 for pull request → AI review findings; human attention boundary: work-product-review. Inference · Catalog judgment · Medium confidence · `cloudflare-ai-stack--operating-models-0` Confidence reason: The source documents automated review findings, but the record combines several platform workflows. Qualifications: - Observation date: 2026-04-20 Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ## Implementation details ### Sandbox Dynamic Workers for sandboxed code execution; Sandbox SDK to clone/build/test Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-sandbox` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Harness OpenCode + Windsurf clients; Agents SDK (McpAgent + Durable Objects) for stateful sessions Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-harness` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Model Workers AI (open-weight, on-platform) + frontier models (Opus, GPT), routed by task Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-model` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Interfaces cli, ci, web Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-interfaces` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Tool access MCP Server Portal; one OAuth point aggregating 182+ tools from 13 servers; AI Gateway for routing, cost, BYOK, ZDR Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-tool-access` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Knowledge Backstage catalog (2,055 services) + AGENTS.md generated across ~3,900 repos Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-knowledge` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Credentials Zero API keys on client machines; a Worker injects keys server-side; Cloudflare Access (Zero Trust) auth Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-credentials` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Context management Code Mode collapses upstream tool schemas into search + execute, holding token overhead constant at scale Fact · Reported · High confidence · `cloudflare-ai-stack--architecture-context-mgmt` Confidence reason: A linked first-party source states the claim. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ## Reported metrics ### Headline claim 47.95 million AI requests in 30 days across the internal AI engineering system Metric · Reported · High confidence · `cloudflare-ai-stack--headline-metric` Confidence reason: A linked first-party source states the claim. Qualifications: - The source does not report the denominator of this figure. - Reported by: Cloudflare - Scope: Internal AI engineering requests in the 30 days preceding the report - Method: Company-reported AI Gateway count for the preceding 30 days - Observation date: 2026 Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) · Preserved content.md, lines 14–20 ### Key observation 3,683 internal users (60% of company, 93% of R&D) Metric · Reported · High confidence · `cloudflare-ai-stack--key-metrics-0` Confidence reason: A linked first-party source states the claim. Qualifications: - Reported by: Cloudflare - Scope: Active internal AI coding-tool users in the preceding 30 days - Denominator: Approximately 6,100 employees for company share; R&D organization for R&D share - Observation date: 2026 Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) · Preserved content.md, lines 14–16 ### Key observation 47.95M AI requests and 241.37B tokens via AI Gateway in the preceding 30 days Metric · Reported · High confidence · `cloudflare-ai-stack--key-metrics-1` Confidence reason: A linked first-party source states the claim. Qualifications: - The source does not report the denominator of this figure. - Reported by: Cloudflare - Scope: Internal AI requests and AI Gateway tokens in the preceding 30 days - Method: Reported request counts and AI Gateway token counts - Observation date: 2026 Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) · Preserved content.md, lines 14–20 ### Key observation 10,952 merge requests in the week of March 23, 2026, nearly double the Q4 baseline; four-week average above 8,700 Metric · Reported · High confidence · `cloudflare-ai-stack--key-metrics-2` Confidence reason: A linked first-party source states the claim. Qualifications: - The source does not report the denominator of this figure. - Reported by: Cloudflare - Scope: Company merge requests in the week of March 23, 2026, versus Q4 baseline; not agent-authored PRs - Method: Weekly merge-request count; distinct from the four-week rolling average - Observation date: 2026-03 Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) · Preserved content.md, lines 25–29 ### Key observation 295 teams using agentic AI tools Metric · Reported · High confidence · `cloudflare-ai-stack--key-metrics-3` Confidence reason: A linked first-party source states the claim. Qualifications: - The source does not report the denominator of this figure. - Reported by: Cloudflare - Scope: Teams using agentic AI tools and coding assistants in the reported 30-day snapshot - Observation date: 2026 Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) · Preserved content.md, lines 14–18 ## Lessons and interpretation ### Lesson Centralize through a proxy early; direct-to-gateway looks simpler but blocks per-user attribution, model cataloging, and policy later Inference · Catalog judgment · Medium confidence · `cloudflare-ai-stack--lessons-learned-0` Confidence reason: The catalog derives this observation from the linked sources. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Lesson Without structured data, agents are working blind; they read code but can't see the system around it (Backstage / AGENTS.md) Inference · Catalog judgment · Medium confidence · `cloudflare-ai-stack--lessons-learned-1` Confidence reason: The catalog derives this observation from the linked sources. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Lesson Tool schemas eat context (34 GitLab tools ≈ 7.5% of a 200K window); collapse them at the portal Inference · Catalog judgment · Medium confidence · `cloudflare-ai-stack--lessons-learned-2` Confidence reason: The catalog derives this observation from the linked sources. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ### Lesson Frontier + open-source hybrid: route a growing share of workloads to cheaper self-hosted models Inference · Catalog judgment · Medium confidence · `cloudflare-ai-stack--lessons-learned-3` Confidence reason: The catalog derives this observation from the linked sources. Evidence: - Supports · [1] [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) · [Preserved copy](https://github.com/steel-experiments/internal-agents-map/blob/main/archive/sources/cloudflare-ai-stack-source-1/content.md) ## Sources 1. [The AI engineering stack we built internally](https://blog.cloudflare.com/internal-ai-engineering-stack/) - Engineering blog · First party · Evidence - Original URL: - Accessed: 2026-08-12 · Last verified: 2026-08-31 - Preserved copy in the repository: 2. [Hacker News discussion of Cloudflare's internal AI engineering stack](https://news.ycombinator.com/item?id=47837240) - Hn thread · Community · Commentary - Original URL: - Published: 2026-04-20 · Accessed: 2026-08-12 · Last verified: 2026-08-31 - Preserved copy in the repository: