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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/yeachan-heo/oh-my-codex --skill ecomode- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads ecomode automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Ecomode deprecated
Hard-deprecated. Do not invoke or route this skill. Use $ultrawork directly for maintained high-throughput execution workflows.
What Ecomode Does
Overrides default model selection to prefer cheaper tiers:
| Default Tier | Ecomode Override |
|---|---|
| THOROUGH | STANDARD, THOROUGH only if essential |
| STANDARD | LOW first, STANDARD if needed |
| LOW | LOW - no change |
What Ecomode Does NOT Do
- Persistence: Use
ralphfor "don't stop until done" - Parallel Execution: Use
ultraworkfor parallel agents - Delegation Enforcement: Always active via core orchestration
Combining Ecomode with Other Modes
Ecomode is a modifier that combines with execution modes:
| Combination | Effect |
|---|---|
eco ralph | Ralph loop with cheaper agents |
eco ultrawork | Parallel execution with cheaper agents |
eco autopilot | Full autonomous with cost optimization |
Ecomode Routing Rules
ALWAYS prefer lower tiers. Only escalate when task genuinely requires it.
| Decision | Rule |
|---|---|
| DEFAULT | Start with LOW tier for most tasks |
| UPGRADE | Escalate to STANDARD when LOW tier fails or task requires multi-file reasoning |
| AVOID | THOROUGH tier - only for planning/critique if essential |
Agent Selection in Ecomode
FIRST ACTION: Before delegating any work, read the agent reference file:
Read file: references/agent-tiers.md
This provides the complete agent tier matrix, MCP tool assignments, and selection guidance.
Ecomode preference order:
// PREFERRED - Use for most tasks
use /prompts:executor for this scoped task
use /prompts:explore for this scoped task
use /prompts:architect for this scoped task
// FALLBACK - Only if LOW fails
use /prompts:executor for this scoped task
use /prompts:architect for this scoped task
// AVOID - Only for planning/critique if essential
use /prompts:planner for this scoped task
Delegation Enforcement
Ecomode maintains all delegation rules from core protocol with cost-optimized routing:
| Action | Delegate To | Model |
|---|---|---|
| Code changes | executor | LOW / STANDARD |
| Analysis | architect | LOW |
| Search | explore | LOW |
| Documentation | writer | LOW |
Background Execution
Long-running commands (install, build, test) run in background. Maximum 20 concurrent.
Token Savings Tips
- Batch similar tasks to one agent instead of spawning many
- Use explore (LOW tier) for file discovery, not architect
- Prefer LOW-tier executor routing for simple changes - only upgrade if it fails
- Use writer (LOW tier) for all documentation tasks
- Avoid THOROUGH-tier agents unless the task genuinely requires deep reasoning
Disabling Ecomode
Ecomode can be completely disabled via config. When disabled, all ecomode keywords are ignored.
Set in ~/.codex/.omx-config.json:
{
"ecomode": {
"enabled": false
}
}
State Management
Use the CLI-first state surface (omx state ... --json) for ecomode lifecycle state. If explicit MCP compatibility tools are already available, equivalent omx_state calls are optional compatibility, not the default.
- On activation:
omx state write --input '{"mode":"ecomode","active":true}' --json - On deactivation/completion:
omx state write --input '{"mode":"ecomode","active":false}' --json - On cancellation/cleanup:
run
$cancel(which should callomx state clear --input '{"mode":"ecomode"}' --json)
FAQ
What does the ecomode skill do?
Ecomode deprecated shim
How do I install ecomode?
Run npx skills add https://github.com/yeachan-heo/oh-my-codex --skill ecomode in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/ecomode/ (personal) or .claude/skills/ecomode/ (project).
Which AI agents can use ecomode?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is ecomode safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains ecomode?
It is published by yeachan-heo in yeachan-heo/oh-my-codex. It has 100 recorded installs.
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