python-package-development

ECC provides a modular environment of specialized subagents, development skills, rules, commands, session state, and security hooks for planning, testing, review, debugging, and reusable knowledge. It is primarily distributed as a Claude Code plugin, with adapters and configuration for Codex, OpenCode, Cursor, and other assistants. Its selective installer lets advanced users add only the components needed for their workflow rather than adopting the entire collection.

Store task plans, findings, and progress in Markdown files so coding agents can recover after context loss, session clearing, crashes, or handoffs between workers. Optional lifecycle hooks remind the agent to reread and update the plan, while gated modes prevent it from stopping before explicit completion conditions are met. The skill works across many SKILL.md-compatible coding agents and supports shared state for multi-agent work.

SwiftUI Pro is an installable agent skill for Claude Code, Codex, Gemini, Cursor, and other coding assistants. It targets recurring model mistakes in SwiftUI API use, state management, layout, animation, performance, deprecated features, and VoiceOver accessibility, and can run as a broad review or focus on one concern. The documented guidance targets iOS 26 or later and Swift 6.2 or later, making it most relevant to projects adopting current Apple platform APIs.

Codex++ patches the locally installed Codex Desktop app so a small runtime can load tweaks from a user-owned folder. Those tweaks may alter the interface, add settings pages, run main-process code, or use OS-level features through its native bridge, while runtime files, configuration, logs, backups, and tweak data remain outside the app bundle. A watcher can reapply the patch after Codex updates. This is an unofficial modification that executes local extension code, so users should rely on its diagnostics, safe mode, repair, and uninstall controls.