[chain/appchain] Select no-value appchain prototype framework

[FlowmemoryAI]

Objective

Select the first no-value appchain prototype framework and topology after the local Anvil harness and Base-first evidence gates are satisfied.

Allowed folders

• research/appchain/
• research/l1/ only for comparison notes
• infra/chain/ only for prototype runbook documentation
• docs/DECISIONS/ if a framework selection is accepted

Forbidden folders

• Production appchain implementation
• Sovereign L1 implementation
• Tokenomics, validator rewards, staking, or slashing
• Mainnet deployment scripts
• Production bridge contracts
• Dashboard UI
• Hardware CAD

Acceptance criteria

• Compare OP Stack-derived, Base Appchain-style, and local-only simulation approaches.
• Define prototype topology: parent chain, appchain RPC, sequencer, batcher/proposer, DA assumption, and anchor path.
• Define no-value constraints and stop conditions.
• Define required measurements: throughput, latency, cost, reorg handling, DA recovery, and verifier reconciliation.
• Produce a go/no-go recommendation before implementation.

Risk level

High

Recommended agent

FlowMemory Chain / Appchain Agent with Security Agent review