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Achievements

Achievement: Pull Sharkx3Achievement: Pair ExtraordinaireAchievement: YOLOAchievement: Quickdraw

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landxcape/README.md

Purna Kalyan Shakya

Senior Flutter Engineer

Software engineer focused on application architecture, runtime performance, low-level platform integration, and developer tooling in Flutter and Dart. Work centers on predictable runtimes, offline-first systems, and resilient tools built to handle adverse real-world environments.

Architecture

clean_feature_arch

Toolkit for scaffolding and enforcing Feature-First Clean Architecture boundaries in Flutter projects with architectural lint rules.

repository_kit

Pure Dart toolkit for implementing offline-first repositories by managing cache-vs-remote strategy decisions with functional Result types.

Flutter Architecture Standard

Documentation defining architectural rules, dependency boundaries, and project structure across Flutter projects.

Performance & Concurrency

animated_marker

Animates Google Maps marker position and bearing (shortest angular path) between location updates with frame-rate adjustments under load.

scroll_texts_widget

Horizontal marquee text ticker that renders directly to the canvas using a timer ticker to avoid rebuilding widget trees.

isolate_runner_mixin

Dart mixin for running CPU-intensive tasks in a background isolate without blocking the UI isolate.

resumable_downloader

Chunked HTTP range downloader with SQLite state persistence to pause and resume interrupted downloads.

Systems Tools & CLI

Available via Homebrew tap landxcape/tap:

mso (mac-sym-offload)

macOS CLI tool that offloads developer build directories and SDK caches (~/.gradle, ~/.android, Xcode derived data) to external storage using APFS volume cloning and atomic symlinks with rollback protection.

brew install landxcape/tap/mso

camgylph

Terminal utility that renders live webcam video as colored ANSI characters.

brew install landxcape/tap/camgylph

rscan

CLI network utility for Layer 2 ARP subnet discovery and TCP port scanning.

brew install landxcape/tap/rscan

synkrophase

Local network media playback synchronizer using clock drift compensation and UDP multicast.

brew install landxcape/tap/synkrophase

Native Integration

biometric_secure_vault

Key-value storage for Flutter that gates reads and writes behind biometric authentication prompts with sealed result types.

ffr_crypto

Cryptographic package executing RSA, AEAD, hashing, and ECC operations natively via Dart FFI.

Simulations

nbody_sim_core

Framework-independent gravitational N-body simulation core supporting numerical integrators (Euler, Velocity Verlet, Runge-Kutta 4th Order).

nbody_sim_flutter

Flutter widgets for visualizing and interacting with gravitational N-body simulations on canvas.

Technical Links

Pinned Loading

  1. animated_marker animated_marker Public

    The AnimatedMarker widget is a Dart class that animates the movement of markers on a Google map.

    Dart 3 3

  2. resumable_downloader resumable_downloader Public

    A robust download manager with resumable support, queuing, concurrency, and error handling, built on Dio.

    Dart 9 2

  3. clean_feature_arch clean_feature_arch Public

    CLI and analyzer for scaffolding and enforcing Clean Architecture in Flutter projects. Version 1.6.0 provides full support for modern Dart 3.x patterns and modular dependency injection.

    Dart

  4. ffr_crypto ffr_crypto Public

    A Flutter-first, Rust-powered native cryptography package using Dart FFI and Flutter Native Assets.

    Dart 1

  5. biometric_secure_vault biometric_secure_vault Public

    Secure key-value storage for Flutter that gates sensitive data access behind biometric authentication (FaceID, Fingerprint, or Iris).

    Dart

  6. isolate_runner_mixin isolate_runner_mixin Public

    A Flutter-aware Dart mixin for easily running CPU-intensive tasks, including those that use Flutter plugins, in a background isolate.

    Dart 2