From core protocol development to DevOps tools, Test in Prod builds things that matter to OP Stack. — OP-Erigon: We built OP-Erigon, the first alternative execution client to OP Stack built with the Erigon client. We maintain OP-Erigon by keeping it updated with upstream, supporting more features, building OP-Otterscan, etc. Span Batch: We researched and implemented Span Batch with OP Labs—new batch specs that minimize L1 data cost, initial design by Proto; aims to deploy with Canyon hardfork. Engine P2P Sync: We implemented Engine P2P Sync support for OP-Node that reduces block sync time—e.g., snap sync. Public RPC & Block Explorer: We host OP-Erigon public RPCs & OP-Otterscan on OP Mainnet / Goerli. OP Charts: We built OP Charts, a Helm chart repository for OP Stack infrastructures.