I build systems.
Useful, interesting, or efficient —
ideally all three.

An edge assistive system for blind and low-vision users. TongXing runs NPU perception, GPU AgentCore, and CPU offline speech on one phone, keeping obstacle warning local while a tool-using voice agent closes touch-first app tasks through MCP tools and Android accessibility actions.

A Waybar widget that surfaces remaining quota and reset time for Claude Code, Codex CLI, GitHub Copilot, and OpenCode Zen. Uses browser cookies for Claude and Codex; no API keys required.

As an upstream contributor to Animeko, an open-source anime streaming app I use regularly, I work on cloud download, platform support, and smaller UI/data-flow pieces across the app.

1. +3,054 / -41
   PikPak cloud offline-download Merged RFC #2976 ↗ PR #2978 ↗

   Merged upstream. Adds a cloud-backed alternative to local BitTorrent, with HTTPS stream handoff, transparent fallback, credential handling, and a reusable Kotlin Multiplatform SDK extracted from the work.

2. +1,753 / -17
   HLS manifest filtering Active RFC #3039 ↗ PR #3097 ↗

   Open upstream PR for experimental HLS ad-segment filtering before playback reaches the platform player, using a playback-scoped localhost proxy while keeping ExoPlayer, VLC, AVKit, and mediamp boundaries unchanged.

3. +352 / -34
   mediamp Windows ARM64 FFmpeg runtime Merged mediamp PR #32 ↗

   Merged upstream. Adds Windows ARM64 FFmpeg runtime support to mediamp, covering the media runtime piece needed by Animeko on Windows on Arm.

4. +258 / -16
   WOA64 build support Active anitorrent PR #3 ↗ workspace ↗

   Open follow-up track for running Animeko on Windows on Arm64: upstreaming the anitorrent native runtime piece while keeping a known-good workspace that can produce portable zip builds.

Fresh is one of my everyday editors. My upstream work focuses on making its vi_mode closer to the editing behavior I expect, with occasional platform and terminal UI fixes around the same workflow.

1. +54 / -13
   Windows ARM64 release artifacts Merged PR #2353 ↗

   Merged upstream. Adds Windows ARM64 release artifacts to the Fresh release pipeline, making the editor easier to install on Windows on Arm devices.

2. +793 / -166
   vi-mode unnamed register behavior Merged PR #2368 ↗

   Merged upstream. Updates vi-mode delete, change, and yank operations so the unnamed register follows expected editor behavior.

3. +494 / -47
   settings TUI mouse polish Merged PR #2395 ↗

   Merged upstream. Polishes settings-screen mouse interactions and dirty-state markers so configuration edits behave more predictably in the terminal UI.

4. +1,883 / -30
   vi-mode compatibility motions Merged PR #2398 ↗

   Merged upstream. Adds more vi-mode compatibility motions and word-search behavior for editor navigation.

Small, targeted upstream contributions and bug reports outside my own repositories, collected separately from my long-running project work.

1. +496 / -140
   pikpakcli time-range download Merged PR #64 ↗

   Merged upstream. Adds a `--time-range` option for downloading a clipped segment from a single remote video through ffmpeg stream copy, with tests for parsing, output names, media URL selection, and missing-ffmpeg errors.

2. +73 / -11
   media-kit Windows ARM64 libmpv Active PR #34 ↗ Kazumi ↗

   Open upstream PR adding Windows ARM64 libmpv support to media-kit for Kazumi, a Dart anime streaming app built around custom source rules, online playback, danmaku, and real-time super resolution.

3. llama.cpp CJK tool-call issue Closed Issue #19391 ↗

   Diagnosed a llama.cpp CJK tool-call history pollution bug around `ensure_ascii=true` argument serialization, in the parser/tool-call subsystem later reshaped by the autoparser refactor.

• renpak Rust · MPL-2.0
  github.com/NihilDigit/renpak ↗

  AVIF compression for Ren'Py visual novel archives — typically 4–5× smaller on image data, without forking the engine. Hooks Ren'Py's standard file_open_callback, so the game decodes AVIF transparently at runtime. Tested on Eternum (Caribdis): 11.3 → 7.2 GiB on disk, 4.73× on the image bytes themselves.

• FocusWell Kotlin / TypeScript
  github.com/NihilDigit/focuswell ↗

  Android-first time accounting app for uneven energy and focus. It turns daytime focus into a storable leisure reserve, so high-energy days can support low-energy days without streak pressure or progress anxiety.

• pikpak-kotlin Kotlin · MIT
  github.com/NihilDigit/pikpak-kotlin ↗

  A Kotlin Multiplatform SDK for PikPak cloud storage. Handles session persistence, captcha auth, rate limiting, and resumable uploads. Extracted from the Animeko PikPak work.

• coding-agents-setup PowerShell / Shell
  github.com/NihilDigit/coding-agents-setup ↗

  A modern local toolchain setup for coding agents, packaged as Windows and Linux setup scripts. It can install and configure development tools, shell helpers, skills layout, and Codex/Claude rule files generated from shared fragments.

• 2026 Preprint

  ANVIL: Accelerator-Native Video Interpolation via Codec Motion Vector Priors

  Shibo Liu

  arXiv preprint

• 2026 Under review

  RAFNet: A Relation-Aware Adaptive Fusion Network for Dense Classroom Student Behavior Recognition

  Yongying Xia*, Elankovan A. Sundararajan, Shibo Liu, Lei Xiao

  The Visual Computer