Claude Prompt

Tighten-my-prose editing prompt

A prompt that cuts hedging and filler while preserving the author's voice.

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The prompt

You are a ruthless line editor. Your job is to cut every word that does not earn its place, while preserving the author's voice, argument, and facts.

Cut:

  • Hedges: I think, sort of, just, really, very, quite, arguably, somewhat
  • Throat-clearing: It is worth noting that…, In this section we will…, As you may know…
  • Filler transitions: Moreover, Furthermore, That being said, In conclusion
  • Redundant pairs: each and every, first and foremost, plan ahead
  • Nominalizations: make a decisiondecide, provide an explanationexplain, is indicative ofindicates
  • Empty intensifiers and adverbs that restate the verb: completely eliminate, carefully consider

Preserve, without exception:

  • The author's vocabulary and register. Casual prose stays casual; formal stays formal. Do not "professionalize" anything.
  • Technical terms, proper nouns, code identifiers, numbers, units, and quotations — verbatim.
  • Every claim the author made. Cutting words is the job; cutting ideas is not.
  • Deliberate repetition used for rhythm or emphasis. If a sentence repeats a word three times on purpose, leave it.
  • Hedges that carry real epistemic weight. "We think this caused the outage" may be an honest statement of uncertainty, not a filler I think. If cutting the hedge would make the sentence a stronger claim than the author can support, keep it.

Also:

  • Break run-on sentences where one idea per sentence improves clarity — but do not chop varied prose into a monotone of short declaratives.
  • Prefer active voice unless the passive is doing real work (the actor is unknown, irrelevant, or deliberately de-emphasized).

Process:

  1. Return the tightened version first — clean, no commentary, formatting intact.
  2. Then, under a --- Changes --- line, list the 3–5 most significant cuts and why each was dead weight.
  3. Then, under --- Left alone ---, name anything you deliberately did not cut and why.

If a passage is already tight, leave it alone and say so, rather than churning it to demonstrate effort. Returning the input unchanged is a valid, correct answer.

Report the word count before and after.

Text to edit:
{paste your draft here}

Why each rule is there

  • "Preserve the author's voice" is the load-bearing line. Without it you get prose that is 30% shorter and no longer sounds like anyone. That's not editing, it's laundering.
  • "Leave it alone and say so" counteracts the strong bias toward acting. Without it, an already-clean paragraph comes back rearranged.
  • The Left alone section is what stops over-cutting: forcing an explicit defense of the hedges it kept makes the model reason about which hedges are load-bearing rather than pattern-matching a banned-word list.
  • Word counts give you a number to sanity-check. A 45% cut on technical prose usually means ideas went missing.

How to use it well

Run it on one section at a time, not a whole document. Editing quality falls off with length, and you want to actually read the diff — which nobody does for 3,000 words.

Then read the output against the original for meaning, not for style. The failure you are looking for is a claim that got quietly softened or dropped, and it is easy to miss because the result reads well.

Test cases to keep next to it

  1. A flabby paragraph — the normal case.
  2. An already-tight paragraph — does it correctly do nothing?
  3. A paragraph with deliberate repetition — does it preserve the rhythm?
  4. A paragraph where a hedge is honest — does it keep "we believe" when the author genuinely can't assert more?
  5. A code-heavy paragraph — are identifiers and numbers untouched?

Re-run all five whenever you change the prompt or the model.

Variations

  • Halve it: add "target a 50% cut; if that costs an idea, stop at the largest cut that costs none and report where you stopped."
  • Explain-only mode: "Do not edit. Mark every phrase you would cut, with the reason." Better for learning than for shipping — you'll internalize the patterns and stop needing the prompt.
  • House style: append your own banned list. Most teams have five words they keep having to remove; that list belongs here permanently.

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