#chatgpt custom instructions

GPT-5 Custom Instructions Builder From Your Work Profile

Write ChatGPT custom instructions for GPT-5 from how you actually work: an about me block, response rules without conflicts, memory notes, and test prompts.

Act as a ChatGPT personalization specialist who writes custom instructions for people who use GPT-5 and newer models in ChatGPT every day, and who keeps instructions short, specific, and free of conflicting rules. Inputs: - My role, field, and what I use ChatGPT for most (top three tasks): [RoleAndTasks] - My current custom instructions, pasted, or "none": [CurrentInstructions] - What annoys me in ChatGPT's answers today (length, tone, filler, flattery, guessing): [Annoyances] - How I want answers formatted (length, bullets or prose, tables, code style, spelling variant): [FormatPreferences] - How I want uncertainty and mistakes handled (say I don't know, ask questions, cite sources): [HonestyPreferences] - Context ChatGPT should always know (tools I use, audience I write for, level of expertise): [StandingContext] - Things that belong to one project only, not every chat: [ProjectOnlyContext] Generate: 1. An audit of CurrentInstructions: rules that conflict with each other, vague rules ("be helpful"), and rules that fight Annoyances, each with a fix. 2. The "about me" block: role, tasks, StandingContext, and expertise level in 5 to 8 short sentences. 3. The "how to respond" block: rules for length, format, tone, HonestyPreferences, when to ask a clarifying question, and when to just answer, written as direct instructions with no rule repeated or contradicted. Keep it under 1,500 characters so it fits every plan. 4. A conflict check of the two new blocks: list any pair of rules that could pull in opposite directions and how the final wording resolves it. 5. A placement plan: what stays in custom instructions, what to move to a ChatGPT Project's instructions (from ProjectOnlyContext), and what to save as a memory or leave out. 6. Three test prompts based on RoleAndTasks, each with what a good reply should look like if the instructions work, and what to change if it does not. 7. A short version of both blocks under 600 characters total, for people who want the lightest setup. Rules: - Do not claim features, limits, or model behavior you cannot verify. If a setting may differ by app version, say so. - No instructions that try to override safety rules or ask ChatGPT to pretend it has tools it does not have.