Claude Prompt Templates (2026): Fill-in-the-Blank

Draft a reply to this thread in my voice.
Goal: [WHAT I WANT TO HAPPEN]. Tone: [WARM AND PROFESSIONAL / DIRECT].
<thread>
[PASTE THE EMAIL THREAD]
</thread>
Under [WORD COUNT] words. Address every open question. Don't invent facts — leave [placeholders] where you need info. Give me two versions: concise and slightly warmer.

Turn this meeting transcript into a follow-up.
<transcript>
[PASTE THE TRANSCRIPT]
</transcript>
Give me: a 5-bullet summary of decisions; action items as owner — task — due date (mark unassigned/no date where missing); unresolved questions; and a short recap email to attendees.

Write a one-page [BRIEF / MEMO] for [AUDIENCE] that should drive [DECISION / ACTION].
<raw>
[PASTE YOUR NOTES AND ANY DATA]
</raw>
Structure: TL;DR, context, options/recommendation, risks, next steps. One page max. Recommend, don't just summarize. Bold the one thing they must not miss.

Help me decide and write it up. Think step by step.
Decision: [DECISION]. What matters: [BUDGET, TIMELINE, RISK, TEAM].
<options>
[OPTION A]
[OPTION B]
[OPTION C]
</options>
Score each option against my criteria in a table, recommend one with reasoning, write a one-page memo for my manager, and list the top 2 risks of the pick.

Write a first draft of [PIECE] for [AUDIENCE], about [LENGTH] words, in a [PLAIN / WARM / PUNCHY] style.
<notes>
[PASTE YOUR BULLETS, QUOTES, LINKS]
</notes>
Use only what's in my notes — don't invent facts. Open with a concrete hook, not a definition. No clichés. Leave [placeholders] where I still need to add something.

Learn my writing voice, then write in it.
<samples>
[PASTE 2-3 PIECES OF YOUR WRITING]
</samples>
First describe my voice in 5 bullets (sentence length, vocabulary, rhythm, tone, quirks). Then write [THE PIECE]: [TOPIC], [AUDIENCE], [LENGTH]. Match the samples; don't drift into generic style.

Act as a strict line editor. Make this sharper without changing my voice.
<text>
[PASTE YOUR DRAFT]
</text>
Tighten every sentence, kill clichés and filler, keep my quirks. Show the edited version, then list the 3 biggest changes and why. Don't add new claims.

Repurpose this into social posts for [PLATFORMS], in a [VOICE] voice.
<source>
[PASTE THE ARTICLE / TALK / THREAD]
</source>
Pull the 5 strongest standalone ideas; for each, write a post with a real hook (no "Here are 5 things..."). Keep every claim faithful to the source. Say which to lead with and why.

Act as a senior [LANGUAGE] engineer. Write a function that [INPUTS -> BEHAVIOR -> OUTPUTS] and handles [EDGE CASES]. Clean, idiomatic code following [CONVENTION], with input validation and unit tests for the happy path and every edge case. Explain any non-obvious decision in one line.

Diagnose and fix this. Think step by step.
<error>
[PASTE THE FULL ERROR + STACK TRACE]
</error>
<code>
[PASTE THE RELEVANT CODE]
</code>
Expected: [X]. Actual: [Y]. Give the most likely root cause first, then 2 alternates, the exact fix, and how to confirm it's resolved.

Act as a staff engineer reviewing this. Think step by step. Intent: [WHAT IT SHOULD DO].
<code>
[PASTE THE DIFF OR FILES]
</code>
List issues most severe first (correctness, security, edge cases, then style), each with the location and a fix. Don't rewrite the whole file — point to specific lines.

Build a working single-file app as an Artifact: [WHAT IT DOES] for [USERS] on [DEVICE]. One self-contained HTML file, inline CSS/JS, no dependencies. Clean responsive UI, sensible defaults, handle empty and error states. After it works, list 3 features I could add next.

Research [QUESTION] and give me a sourced brief. Use web search for anything current.
Purpose: [THE DECISION THIS FEEDS]. What I already know: [CONTEXT].
Cover current state, key options, trade-offs, and what's changed recently. Cite sources with links. End with a recommendation and 3 open questions. Flag anything you're unsure about.

Compare [OPTION A], [OPTION B], and [OPTION C] for [PURPOSE]. Use web search and cite current pricing.
What matters most: [CRITERIA]. Build a comparison table scored against my criteria, recommend one with a "choose X instead if..." caveat, and note anything that changed recently.

Build me a study plan to learn [TOPIC/SKILL].
Current level: [BEGINNER / SOME EXPERIENCE]. I can spend [X HOURS/WEEK] and want to be [TARGET ABILITY] in [TIMEFRAME].
Break it into weekly milestones with a concrete outcome each; for each, one thing to read/watch and one to build/practice. Point out where people get stuck. Tell me how I'll know I've learned each part.

Give me a first look at this dataset. Use the analysis tool to compute, don't estimate. My question: [QUESTION].
<data>
[ATTACH OR PASTE THE DATA]
</data>
Data-quality check first (rows, types, missing values, duplicates, anomalies), then a statistical summary, the 3 things that stand out, and what I should ask next.

Answer this from my data. Compute with code and show your work. Question: [PRECISE QUESTION].
<data>
[ATTACH OR PASTE THE DATA]
</data>
Give the exact answer with numbers, show the calculation so I can verify, note any assumption (date ranges, filters, blanks), and flag if the data can't answer this.

Turn my data into a clean chart as an Artifact. The point it should make: [MESSAGE].
<data>
[ATTACH OR PASTE THE NUMBERS]
</data>
Pick the chart type that best shows that point (say why in one line), render it as an interactive Artifact, label axes and add a title, and suggest one alternative view.

Give me a working [EXCEL / GOOGLE SHEETS] formula and explain it.
My columns: [E.G. DATES IN A, AMOUNT IN B, CATEGORY IN C]. I want to [WHAT TO CALCULATE].
Give the exact formula with real references, explain each part in one line, offer a cleaner alternative if there is one, and warn me about edge cases (blanks, text vs. numbers).