This is a mature, actively maintained AI agent skill called 'last30days' that enables agents (Claude Code, Codex, Grok, Gemini CLI, MCP hosts) to research any topic by aggregating content from 20+ social and news platforms (Reddit, X, YouTube, TikTok, Instagram, Hacker News, Polymarket, GitHub, arXiv, Techmeme, Digg, and more) over a rolling 30-day window. The system is primarily a CLI engine (Python) with a companion Go MCP server for Claude Desktop. It employs a sophisticated pipeline: query planning by intent, parallel retrieval from multiple backends (keyless APIs, paid scrapers, CLI tools, LLM-based search), source-specific normalization, engagement-weighted relevance scoring, cross-source clustering, and deterministic fusion (weighted RRF) with per-author caps and diversity floors. Output is rendered as structured JSON, compact text, or self-contained HTML with optional publishing and Atom feeds. The codebase emphasizes security (credential hygiene, no browser cookie reads in unattended mode), determinism (fixture-based evaluation harness with grounding/recency/coherence scores), and graceful degradation (per-source fallback chains, never-raise error envelopes). While classified as an application (it's a skill/plugin for agent hosts), it exhibits strong data engineering traits: source adapters, normalization pipelines, scoring models, and an offline evaluation framework.
lx-music-desktop is a cross-platform Electron-based music player (Vue 3 + TypeScript) that aggregates multiple Chinese streaming services (NetEase, Tencent, Kugou, Kuwo, Migu, Baidu, Xiami). It provides music search, playback, playlist management, lyrics (including desktop lyric windows and karaoke-style font rendering), downloads with quality tiers, audio effects (EQ, convolution reverb, pitch shifting), cross-device synchronization over a custom WebSocket protocol, and an HTTP Open API for third-party control. The architecture spans three processes: main (Electron window/tray/IPC, SQLite persistence via better-sqlite3), renderer (Vue app with custom reactive stores and a plugin-based audio engine), and renderer-lyric (dedicated always-on-top lyric window). All built-in music sources were removed in v2.6.0 following a Tencent legal complaint; the app now relies entirely on user-supplied Music API scripts, introducing a sandboxed script runtime with security warnings. The repository is actively maintained (last commit 2026-09-19) but the project is in a transition phase—the maintainer has announced a successor project ('Any Listen'), and the codebase shows signs of legacy accumulation: extensive commented-out code, duplicated components (e.g., MusicSortModal), hardcoded API endpoints/signatures that break frequently, and a custom store implementation diverging from Vuex/Pinia. Despite this, the code is well-organized around provider SDK adapters, composable logic hooks, and a clear main/renderer IPC boundary, with several genuinely reusable patterns.