Is the Eco Max skill free?

Yes. The skill itself is free from sup3x/claude-code-eco. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Eco Max SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install Eco Max?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Eco Max with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Eco Max

Frugality rules plus a low reasoning-effort override for routine chores — measured, not asserted.

by sup3x · sup3x/claude-code-eco

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 160b406

Ran its own bundled fixture (test/orders.js, two real bugs) as a baseline-vs-skill A/B: the un-skilled answer re-pasted the whole fixed file and closed with an unprompted offer to write tests (~220 words); following the skill's rules produced the same two correct fixes cited as path:line with no re-paste in about 45 words — and the repo's own 82-run published benchmark (including an honest Haiku regression) backs the same pattern.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What Eco Max does

A stricter sibling of /eco: same terse-output rules (no re-pasted diffs, lead with the answer, cite path:line, batch tool calls) plus an `effort: low` frontmatter override for the invoked task, aimed at routine chores like renames, small fixes and quick questions. Triggers when the user explicitly wants minimum token spend on low-stakes work; the skill itself tells the user to prefer plain /eco for hard or high-stakes tasks.

How to install Eco Max

git clone https://github.com/sup3x/claude-code-eco.git
mkdir -p ~/.claude/skills
cp -r claude-code-eco/skills/eco-max ~/.claude/skills/eco-max

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Eco Max

/eco-max Frugality rules plus a low reasoning-effort override for routine chores — measured, not asserted.

It also activates on plain-language prompts like these:

Fix these two bugs in orders.js, keep the answer as short as possible
Just rename this variable everywhere, don't re-paste the whole file
Quick low-effort fix for this typo, minimal token spend please

Frequently asked questions

Is the Eco Max skill free?: Yes. The skill itself is free from sup3x/claude-code-eco. SkillProof publishes the install command and an independent test verdict at no cost.
Does Eco Max work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Tested · Works. Ran its own bundled fixture (test/orders.js, two real bugs) as a baseline-vs-skill A/B: the un-skilled answer re-pasted the whole fixed file and closed with an unprompted offer to write tests (~220 words); following the skill's rules produced the same two correct fixes cited as path:line with no re-paste in about 45 words — and the repo's own 82-run published benchmark (including an honest Haiku regression) backs the same pattern.
What is the Eco Max SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install Eco Max?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Eco Max with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.