CKB Dev Log 2026-02-05

[yuqiliu617]

Updates

Features

CKB

• OpenRPC JSON Specification (Draft): Added OpenRPC JSON spec for CKB RPC. Taking inspiration from Swagger and ReDoc, we also built a frontend for browsing and interacting with the RPC.
  • Interactive browser : https://eval-exec.github.io/ckb-rpc/
  • PR: Add combined OpenRPC JSON generator #5093
• Log subscription API: Introduces a new RPC subscription topic for logs, providing real-time access to node logs via RPC, improving observability, debugging, and tooling such as ckb-tui: rpc: implement logs subscription #5092

CKB-CLI

• Upgraded clap and reduced boilerplate with clap_derive, simplifying command and argument definitions in CKB-CLI: Upgrade clap, using clap_derive to define subcommands and arguments ckb-cli#661

CKB-VM

• RV64IM Assembly Execution Mode: CKB-VM can now execute in assembly mode within RV64IM instruction set: Allows ckb-vm to execute in assembly mode within the rv64im environment ckb-vm#502
• Emulation overhead analysis: This test estimates the performance overhead of the CKB-VM RV64IM implementation running on QEMU, with results ranging from 199x to 365x: [Don't Merge] Draft Performance Overhead on rv64im CKB-VM ckb-vm-contrib#47

Improvements

CKB Light Client

• Refactored trait abstractions for better modularity: storage: use trait for some high level storage operations & merge RPC operations of native and wasm ckb-light-client#268
• CI now supports one-click regression testing on any branch, with both SQLite and native DB backends.

CKB Store

• RocksDB Efficiency: RocksDB schema to significantly reduce I/O amplification ( [BREAKING CHANGE] Refactor rocksdb schema to reduce Read/Write Amplification #5085)
  • Write amplification: Reduced by 85%
  • Read amplification: Reduced by 68%

DevRel

• Released a new AI-friendly smart-contract boilerplate designed to work well with AI coding assistants. It was used to build a collateralized loan contract with Claude Opus for approximately 2.2 USD in API cost.
  • Boilerplate: https://github.com/cryptape/ckb-script-app
  • Example project: https://github.com/RetricSu/ckb-collateral-loan
• Added integration test CI in Offckb

Tentacle

• Dependency upgrades: chore: upgrade deps tentacle#421

Tooling & Libraries

• ckb-script-templates update: feat: add code coverage support using native-simulator ckb-script-templates#37

  This integrated native code coverage into the ckb-script-templates via the native-simulator, adding automated reporting tools and CI integration.

Fixes

CKB-CLI

• Fixed deploy causing key/value order in info.json to change: Signing multisig without add-signaure params also updates the info.json ckb-cli#658, deploy: use BTreeMap insteadof HashMap ckb-cli#659

Tooling & Libraries

• ckb-testtool native-simulator fixes:
  • script error propagation: fix: propagate script errors from native-simulator instead of ignoring ckb-testtool#23
  • output-only type scripts: fix: handle output-only type scripts in native-simulator ckb-testtool#24
• ckb-vm-contrib additions: fix(x64-simulator): use actual_index for outputs_data in SOURCE_GROUP_OUTPUT ckb-vm-contrib#46

DevRel

• Fixed CKB docs examples reported by CKBuilders community

In Pipeline…

CKB Core & Infrastructure

• Reviewing existing hardfork signaling docs and finalizing a subsequent plan.
• Continuing work on network latency metrics collection

CKB-VM

• Ongoing RV64IM assembly optimization
• SP1 zkVM research and CKB-VM RV64IM optimization (waiting on SP1 Hypercube zkVM SDK)

CKB Light Client

• Unified storage abstraction with SQLite backend support (vibe coding experiment): refactor: add unified storage abstraction and SQLite backend support  ckb-light-client#270

CKB-TUI

• Adding subscription for logs once merged: rpc: implement logs subscription #5092