Rule.prompt

GPTClaudeDeepSeek··▲ 1,117 copies·updated 2026-07-14

rule-prompt.prompt

---
mode: "agent"
description: "Add a hard rule to the project's always-on prompt. Lightweight, no ceremony. Use any time."
---
<!-- Auto-generated by promptherder from .promptherder/agent/workflows/rule.md — do not edit -->

# Rule

Append the user's rule to `.promptherder/hard-rules.md`.

**What this does:** Adds a rule that the AI must always follow in this project. Hard rules are injected into every session automatically. Use this for project-specific standards, constraints, or guardrails (e.g., "never use eval", "all API routes require auth", "prefer composition over inheritance").

## Steps

1. If the user didn't provide a rule (e.g. just typed `/rule` with nothing after), prompt them:

> **What rule should always be enforced in this project?** Describe it as a clear, actionable statement.

2. Read `.promptherder/hard-rules.md` if it exists.

3. If it doesn't exist, create it with a header:

when to use it

Community prompt sourced from the open-source GitHub repo shermanhuman/promptherder (MIT). A "Rule.prompt" style prompt — adapt the placeholders and specifics to your task. Imported as-is and not independently retested here, so check the output before relying on it.