I am an open-source maintainer and contributor focusing on Linux system programming, high-performance network tunneling, Text User Interface (TUI), and minimalist tool development. I am active as a member of the Cubrid and Gosuda open-source communities.

• Participate in the enterprise-grade open-source RDBMS ecosystem, analyzing open-source database technologies and multi-client integration environments.

• Co-maintain and release lightweight terminal infrastructure and high-performance network relays.

Self-Hostable Relay Tunnel for Localhost

• Introduction: A trustless, high-performance relay tunnel engine that exposes localhost services to the public (e.g., agent web) without port forwarding or configuring firewall rules.
• Key Technologies:
  • E2E Tenant TLS & ECH: Terminates TLS directly at the user endpoint so the relay server cannot decrypt the raw data, and applies ECH (Encrypted Client Hello) to prevent SNI exposure.
  • MITM Detection: Includes a self-verifying probe that compares TLS keying material (Exporter) on both ends to defeat man-in-the-middle attacks and relay-side decryption attempts.
  • Multi-Hop Relay: Implements an anonymous routing structure that chains three or more relay nodes to hide sender and receiver information per node.
  • x402 Sui USDC Payment: Provides a gateway that can require USDC payment via the Sui blockchain when making API calls.
• Usage:

  # 1. Install (macOS / Linux)
  curl -fsSL https://github.com/gosuda/portal-tunnel/releases/latest/download/install.sh | bash
  
  # 2. Expose local port to the public (provides a random public domain by default)
  portal expose 3000
  
  # 3. Expose via a custom relay server
  portal expose 3000 --name myapp --relays https://portal.example.com --discovery=false
  
  # 4. Enable multi-hop (anonymous routing)
  portal expose 3000 --multi-hop-depth 3

Pure C Web Development Suite (Flask alternative for C)

• Introduction: An intuitive, lightweight web development suite for pure C, aiming to be a "Flask for C". It provides multi-protocol support securely and manageably based on BoringSSL, OpenSSL, lsquic, etc.
• Key Technologies:
  • HTTP/3 & WebTransport Support: Binds the lsquic library to implement a high-performance server-side WebTransport session handling QUIC and bidirectional/unidirectional streams(WebTransport at dev branch).
  • Post-Quantum TLS: Supports clean security configurations that force hybrid X25519MLKEM768 and exclude legacy TLS by calling cwist_app_use_pqc_layer(app, true).
  • Zero-copy Reactor: Configures C100K reactor and lock-free queues based on io_uring / epoll / kqueue.
• Usage:

  #include <cwist/app.h>
  
  static void hello(cwist_http_request *req, cwist_http_response *res) {
      (void)req;
      cwist_sstring_assign(res->body, "Hello from CWIST!");
  }
  
  int main(void) {
      cwist_app *app = cwist_app_create();
      cwist_app_use_db(app, ":memory:");
      cwist_app_use_pqc_layer(app, true);
      cwist_app_get(app, "/", hello);
      cwist_app_listen(app, 8080);
      cwist_app_destroy(app);
      return 0;
  }

Predictable & Safe Custom Memory Allocator & Concurrency Runtime for C

• Introduction: A deterministic memory control framework and concurrency runtime created to prevent common limitations of long-running C applications (e.g., heap fragmentation, allocator contention across threads).
• Key Technologies:
  • Generational Arena: An arena system that overcomes heap fragmentation and cleans up large allocation blocks at once using Generation boundaries.
  • Epoch Reclamation (EBR): A thread-safe, lock-free memory reclamation layer without global pauses.
  • Concurrency Model: Implements task thread pools and async primitives like Future / Promise.

Modern C-Based SSH Chat Server & BBS Terminal

• Introduction: A modern C-based SSH/Telnet BBS chat server ported and extended from Go's ssh-chat to C. It offers a 90s retro-style view while internally incorporating a modern security and extension framework.
• Key Technologies:
  • BBS and various TUI commands: Internally implements modular structures such as a BBS (/bbs command supporting sorting and search), RSS reader (/rss), and ASCII art canvas (/asciiart).
  • AI Moderation & Security: An automated toxic content filtering pipeline utilizing the Gemini API and local Ollama backends.
  • Networking & Morse Relay: Provides amateur HAM radio integration based on the Binkp protocol specification.
  • Memory Optimization: Employs an internal custom Epoch GC (sshc_epoch_reclaim) and memory management techniques.
• Usage:

  # 1. Build (runs make in a POSIX environment)
  make
  
  # 2. Run (starts the daemon with port, host key path, etc.)
  ./ssh-chatter -a 0.0.0.0 -p 2222 -k ./host_keys
  
  # 3. Connect via SSH
  ssh nickname@your-ip -p 2222

UEmacs/PK Modernization & Minimalist Terminal Text Editor

• Introduction: An ultra-lightweight terminal editor refactored and optimized for modern remote environments, based on the classic text editor MicroEmacs (UEmacs).
• Key Technologies:
  • Legacy C Refactoring: Modularizes and restructures the spaghetti-like legacy codebase (God Architecture).
  • ncursesw Modernization: Improves unicode (UTF-8) support and multiple view management tailored for modern terminal environments.
  • Enhanced Security: Introduces safety measures for running shell commands within the editor via configuration variables $confirmshell and $makebackup.

FFMPEG-Based Minimalist GTK Audio / CD Player

• Introduction: A minimalist audio playback daemon and client that supports playing local music files as well as audio streams via streaming plugins.
• Key Technologies:
  • gRPC Architecture: Isolates the lightweight Go backend daemon responsible for playback from the UI layer.
  • Streaming Extensibility: Supports extension plugins (such as gozik-yt-music) to fetch external sources like YouTube Music.

• Email: gg582@proton.me
• GitHub: @gg582