Spec-driven development for AI coding agents. Spektacular helps you to generate specifications, the plan, and finally generate the code. Agent-agnostic and pluggable: Claude Code, Bob, Codex.
Latest release 0.20.0 · 21 Sept 2026
4 files for Claude Code, Codex and OpenCode: spektacular, spektacular AGENTS.md, spektacular CLAUDE.md, spek-design — 4,884 tokens loaded in every session.
AGENTS.md C 4,874 tok CLAUDE.md A 10 tok .claude/settings.json A — .claude/skills/spek-design/SKILL.md A 16 tok These files are jumppad-labs/spektacular's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.