{"type":"post","id":"caveman-is-an-open-source-cli-that-changes-23b835","slug":"caveman-is-an-open-source-cli-that-changes-23b835","title":"Caveman is an open-source CLI that changes how coding agents handle responses, file output","description":"Caveman is an open-source CLI that changes how coding agents handle responses, file output, and repeated scripts, with the stated aim of reducing token use and cost.","retrieval_nugget":"Caveman is an open-source CLI that changes how coding agents handle responses, file output, and repeated scripts, with the stated aim of reducing token use and cost. Its 4.0 release adds model-and-effort selection and reusable code-mode scripts; the project reports substantial savings, but those figures come from its own tests and need local validation.","published_at":"2026-11-14","updated_at":"2026-11-14","record_date":"2026-11-14","date_kind":"published_at","topics":["coding-agents","claude","claude-code"],"entities":["Caveman","Julius Brussee","Claude Code","Codex","Gemini CLI","OpenCode"],"related_patterns":["agent-economics-moves-to-completed-work"],"novelty_label":"new_fact","what_changed":"Caveman launches a free coding-agent tool that reduces token use and advertises lower costs than Codex and Claude Code.","prior_refs":["https://newruntime.com/posts/autotoken-open-source-hackathon-experiment-that-compiles-repeated-a6e11d/"],"source_url":"https://github.com/JuliusBrussee/caveman","source_urls":["https://github.com/JuliusBrussee/caveman"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:caveman-is-an-open-source-cli-that-changes-23b835","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/caveman-is-an-open-source-cli-that-changes-23b835/","markdown":"https://newruntime.com/posts/caveman-is-an-open-source-cli-that-changes-23b835.md","json":"https://newruntime.com/posts/caveman-is-an-open-source-cli-that-changes-23b835.json"},"markdown_url":"https://newruntime.com/posts/caveman-is-an-open-source-cli-that-changes-23b835.md","next_reads":[{"type":"topic","path":"/topics/coding-agents/","url":"https://newruntime.com/topics/coding-agents/","title":"Coding Agents","reason":"Explore the coding-agents topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/coding-agents.md","json_url":"https://newruntime.com/topics/coding-agents.json"},{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/claude-code/","url":"https://newruntime.com/topics/claude-code/","title":"Claude Code","reason":"Explore the claude-code topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude-code.md","json_url":"https://newruntime.com/topics/claude-code.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}