Oh-my-codex ecomode

Token-efficient model routing modifier

install

source · Clone the upstream repo

git clone https://github.com/Yeachan-Heo/oh-my-codex

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/Yeachan-Heo/oh-my-codex "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/ecomode" ~/.claude/skills/yeachan-heo-oh-my-codex-ecomode && rm -rf "$T"

manifest: skills/ecomode/SKILL.md

source content

Ecomode Skill

Token-efficient model routing. This is a MODIFIER, not a standalone execution mode.

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
```
ralph
```
for "don't stop until done"
Parallel Execution: Use
```
ultrawork
```
for 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: docs/shared/agent-tiers.md

This provides the complete agent tier matrix, MCP tool assignments, and selection guidance.

Ecomode preference order:

// PREFERRED - Use for most tasks
delegate(role="executor", tier="LOW", task="...")
delegate(role="explore", tier="LOW", task="...")
delegate(role="architect", tier="LOW", task="...")

// FALLBACK - Only if LOW fails
delegate(role="executor", tier="STANDARD", task="...")
delegate(role="architect", tier="STANDARD", task="...")

// AVOID - Only for planning/critique if essential
delegate(role="planner", tier="THOROUGH", 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

omx_state

MCP tools for ecomode lifecycle state.

On activation:

state_write({mode: "ecomode", active: true})

On deactivation/completion:

state_write({mode: "ecomode", active: false})

On cancellation/cleanup: run
```
$cancel
```
(which should call
```
state_clear(mode="ecomode")
```
)