Prompt Routing Skill

A lightweight skill for choosing the right prompt posture before a coding task starts.

This skill was derived from causetrace research on prompt morphology in real development workflows. causetrace measures the runtime effects; this skill applies the routing decision up front.

Labels

• prompt-routing
• routed-prompt
• causetrace-prompt-posture

Lane Boundary

This skill creates a workflow intervention lane.

• direct-prompt native trace stays the native baseline
• routed-prompt trace is not a natural prompt and should not be merged into direct-native conclusions
• expanded prompt study trace belongs to the controlled / intervention lane
• external trajectory stays separate

What it does

• minimal_prompt for open-ended or exploratory work
• human_structured_prompt for medium-complexity tasks
• expanded_constrained_prompt for safety-sensitive or boundary-sensitive tasks

Causetrace Integration

This skill emits explicit causetrace_tags so causetrace can classify routed-prompt traces into the routed_prompt_intervention lane without heuristic inference.

Each routing decision includes a structured metadata block:

causetrace_tags:
  - prompt-routing
  - routed-prompt
  - causetrace-prompt-posture
intervention_lane: routed_prompt_intervention
intervention_evidence_level: strong
intervention_evidence_source: prompt-routing-skill
prompt_posture: <selected posture>
routing_decision_id: <stable id>
selected_prompt_style: <style>
routing_reason: <brief reason>

This keeps the routed_prompt_intervention lane auditable and prevents heuristic lane contamination.

Supported agents

• Claude Code
• Codex
• OpenCode

Related project

This skill is designed to pair with causetrace:

• causetrace records and analyzes the resulting runtime morphology
• prompt-routing selects the prompt posture before execution

The two repositories are intended to reinforce each other:

• prompt-routing improves the quality and consistency of task framing
• causetrace measures how that framing changes execution traces

Install

Run the bundled installer:

./install.sh

Or copy the skill into your agent's skills directory.

Files

• SKILL.md - skill instructions
• agents/openai.yaml - UI metadata
• install.sh - installs the skill into local agent skill directories

License

MIT