Autoprompt

Claude Code is Anthropic's agentic coding tool for the terminal, IDEs, and GitHub. It uses natural-language commands to understand a codebase, create and read files, execute commands, run tests, explain code, manage Git workflows, and handle routine development tasks. It can also load persistent project context, run custom slash commands, use plugins with custom commands and agents, and operate with configurable autonomy while leaving actions such as final pull-request merging to a human. The official repository documents installation for macOS, Linux, and Windows, and identifies npm installation as deprecated.

GitHub Copilot is an AI-powered software-development tool created by GitHub, owned by Microsoft, in collaboration with OpenAI. It suggests code completions, whole-line and whole-function snippets, documentation, and software changes for review by an experienced engineer in supported editors and IDEs. Its workflow includes inspecting changes line by line, assessing architectural correctness, and coordinating work with other pull requests. It is offered as a commercial subscription integrated with Visual Studio Code, Visual Studio, JetBrains IDEs, and GitHub Codespaces.

Agent Skills is an open-source collection of engineering workflows for AI coding agents, developed by Addy Osmani. It packages senior-engineering practices into skills covering the development lifecycle: defining specifications, planning, incremental implementation, testing and debugging, constraints, code review, web-performance auditing, code simplification, and shipping. Slash commands such as /spec, /plan, /build, /test, /review, and /ship activate the corresponding workflows, while skills can also activate automatically based on the work being performed. The /build workflow can generate a plan and implement its tasks in an approved pass, while retaining test-driven verification, individual commits, and pauses for failures or risky steps. It can be installed with the skills CLI or integrated into supported coding agents including Claude Code, Cursor, Codex, Copilot, and Cline.

Open Steps is an open-source pack of agent skills that translates coding-agent output into plain-language reports, verdicts, questions, and next steps. Its skills include done-or-not reports, step-by-step instructions for nontechnical users, simple explanations of agent questions, premortems for hard-to-reverse decisions, verification of another session's claims, next-task recommendations, and plain-language rewrites. The pack is built and measured primarily for Claude Code, where it installs as a plugin with two shell hooks. The session-start hook injects the routing table and the latest report, while the stop hook checks for completed work and requests a report when appropriate. Reports are stored outside project repositories. Skills and routing instructions can also be installed for Codex, Cursor, and Gemini CLI, although the repository notes that hook support differs across those tools. Open Steps separates measured results from assumptions and marks unchecked information as "not checked." It is free software under the MIT license and is developed by Pavlo Kharmanskyi.

Agent Skills is a curated skill registry and npm-based CLI for extending AI coding agents such as Claude Code, Cursor, Copilot, and Antigravity with packaged instructions, templates, and reference files. The CLI fetches a catalog, lets users search and select skills, caches downloads locally, and installs them to selected agents by copying or symlinking them at global or project scope; it also supports updating, removing, auditing, and managing cached skills. The repository describes the catalog as an open-source, human-curated library with CI static analysis, content hashing, lockfiles, path isolation, symlink guards, sanitization, audit logging, and Snyk Agent Scan checks. It also includes an MCP server that exposes progressive-disclosure tools for listing, searching, reading, and fetching skill files. The CLI source is MIT-licensed; maintainer-authored skills are generally CC BY 4.0, while third-party skills retain their own licenses.