prompt-system-router

name	prompt-system-router
description	Classify startup-instruction changes. Routes hot rules, runtime mechanics, owner docs, and deterministic checks.
role	advisor
disable-model-invocation	true

Prompt System Router

Purpose

Answer where instruction changes belong without recreating a routing table.

Authority

• Decision: docs/adr/0011-lean-startup-instructions.md
• Vocabulary: CONTEXT.md
• Health contract: scripts/agent-instructions.sh

Classification

• Startup hot rule: edit AGENTS.md.
• Claude runtime mechanic: keep CLAUDE.md tiny, only when runtime proof requires it.
• Codex runtime mechanic: prefer config/rules/docs; keep startup note tiny only when needed.
• Tool workflow: edit owning skills/*/SKILL.md.
• Deep reference: edit context/, docs/, or skill references/.
• Deterministic contract: move to code, CLI help, generated docs, or runtime checks.
• Repo-specific fact: keep in repo-local docs/agents/, not global startup.
• Personal lookup fact: context/personal.md or the nearest owning context/ file.

Misroutes

• Generated prompt artifact edited as source.
• Workflow mechanics copied into AGENTS.md.
• Repo path, issue tracker, or triage facts added to global startup.
• Deterministic tables repeated in prose.
• Runtime appendix used as second handbook.

Output

• Surface — which startup file/rule/context the change touches (AGENTS.md, CLAUDE.md, skills/*, context/, docs/).
• Owner — what owns that surface: a skill, rule file, generated doc, code, or runtime check.
• Verification — the check that proves delivery (e.g. scripts/agent-instructions.sh).
• Risk — what breaks if the routing is wrong (drift, duplicated contract, repo-fact in global startup).