TL;DR: A Reddit user shared a simple CLAUDE.md rule that forces Claude to lead every long response with a summary. Takes 10 seconds to add. Immediately better outputs.
Reading a wall of text from Claude when you just wanted a quick answer is one of those small frustrations that compounds fast. You asked something. You got 600 words. Now you’re skimming, missing the point, and wishing the model had just told you the important part first. And it happens again tomorrow. And the day after. The cognitive load of parsing AI output is real, and most people don’t even notice it’s slowing them down until someone shows them a better way.
A contributor on r/ChatGPTPromptGenius shared a fix for exactly this. The original poster added a short rule to their CLAUDE.md and it changed how every response is structured from that point on. No plugin. No special model version. Just a line in a config file that tells Claude how you actually want information delivered.
The rule: any response longer than around 100 words must open with a ## TL;DR section. Short bullets. Bold key terms. The core answer up front. Then the full explanation below for whoever wants the depth.
That’s it. No complex prompt engineering. No fine-tuning. One instruction in your config file. Claude reads CLAUDE.md at the start of every session, so once it’s in there, you don’t think about it again. The behavior just becomes the default.
Why This Works
Claude follows explicit structural instructions well. Without direction, it defaults to comprehensive. That’s not a flaw, it’s just not always what you need in the moment.
Think about how you actually use Claude day to day. You’re in the middle of something. You ask a question. You need the answer fast so you can keep moving. What you don’t need is an opening paragraph that restates your question back to you, followed by three paragraphs of context you already have, followed by the actual answer buried at the bottom. That’s the default pattern, and it’s exhausting at scale.
Adding a TL;DR rule doesn’t dumb the output down. It restructures it. The full answer stays. You just don’t have to dig through three paragraphs to find the one sentence that actually mattered. For people running Claude across multiple workflows throughout the day, this kind of structural consistency saves real time. Not hours, but the kind of 30-second friction points that add up to genuine cognitive fatigue by 3pm.
The original poster paired the TL;DR rule with a few supporting guidelines that make it work even better:
- 📌 Prefer short bullets over paragraphs for dense information
- Bold the key word in each bullet so skimmers still catch the point
- One idea per line, no compound sentences that bury the takeaway
Together, these create a response format that works at two reading speeds. Skim the bullets in five seconds and get 80% of the value. Read the full thing when you need the nuance. That’s a genuinely useful piece of design.
Use Cases
This rule pulls the most weight in these situations:
- Using Claude as a research assistant where you want the summary, not the essay, especially when you’re pulling information on multiple topics in one session
- Building agents that surface results in Slack or email (nobody reads walls of text in Slack, and a five-bullet summary is the difference between a message that gets acted on and one that gets ignored)
- Running daily workflows where you need fast decisions from AI output, morning briefings, content calendars, competitive research snapshots
- Debugging sessions where the root cause matters more than the full explanation, and you need to triage fast before going deep
- Code reviews or document summaries where the first thing you need to know is whether there’s actually a problem, not a paragraph of preamble before you find out
If you’re sharing Claude output with a team, the TL;DR structure is even more valuable. Most people won’t read a 400-word AI response someone pastes into a thread. They will read four bullets. Format for the audience, not for the model.
🛠 Prompt of the Day
Here’s the exact instruction from the original post. Drop it directly into your CLAUDE.md:
Lead with a TL;DR for any response longer than ~100 words.
- Start with a ## TL;DR section: 2-5 bullets, the absolute minimum the user needs.
- Then the full answer below it for when they want depth.
- Prefer short bullets over paragraphs. Bold the key word in each bullet.
- One idea per line. No wall-of-text.One commenter in the thread mentioned tweaking this into a custom writing style rather than a global CLAUDE.md rule, which gives you more control over when it kicks in versus when you actually want the full response. That’s worth considering if your use cases are mixed. A global rule works great for productivity and research work. A scoped version might make more sense if you’re also using Claude for creative writing or long-form drafting, where the TL;DR format would feel out of place.
Either way, the underlying principle is the same: Claude does what you tell it to do. Most people just never tell it anything about format, then wonder why the outputs feel hard to use. Small config change, noticeably better day-to-day experience. Check out the original thread on r/ChatGPTPromptGenius for more takes from the community.
Add this in claude.md if you hate wall of text in claude responses
by u/AshxReddit in ChatGPTPromptGenius