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Misc

Prompt Library

Browse, save, and manage curated LLM prompts with import/export.

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About the Prompt Library

The Prompt Library is a browsable, searchable collection of twenty hand-curated LLM prompts spanning five categories: writing, coding, analysis, creative, and productivity. Built-ins range from an email subject line A/B tester and a code review checklist to a five-whys root cause analysis and a weighted decision matrix, each with a title, one-line description, and full prompt text that uses {{variable}} placeholders where you will need to fill in specifics. Search matches titles, descriptions, and prompt bodies, and a category dropdown narrows the list; stats cards show your total and per-category counts. You can copy any prompt with one click, add your own through the New prompt form, delete what you no longer need, and export the entire collection as JSON — then import it on another machine or share it with teammates, with duplicate detection built in. Everything persists in localStorage on your device, so there is no account, no upload, and no waiting: your curated prompt collection survives reloads and travels as a plain JSON file.

Hand-written guide

Examples

Input
Type "subject line" into the Search field.
Output
"Email subject line A/B test" (writing badge) — "Generate 10 subject line variants for an email campaign." — listed as the only match, with a Clear filters button now visible.
Note: Search matches title, description, and prompt text, so a phrase you remember from the body finds the entry.
Input
Click Add prompt, enter Title "Release notes drafter", Category writing, Description "Turn commits into user-facing release notes", Prompt text "You are a technical writer. Turn the following commit list into user-facing release notes for {{product}}. Group changes into New, Improved, and Fixed. Use plain, jargon-free language."
Output
"Release notes drafter" appears at the top of the list, selected, with a Custom badge. Stats update: Total 21, Writing 5.
Note: Title and prompt text are required; the description defaults to "No description." when left blank.
Input
Click Export JSON, then re-import that file on another machine.
Output
A prompt-library.json download containing the full array of prompts (built-ins included). Importing merges entries and skips duplicates that match an existing title + text pair, showing a success toast with the imported count.
Note: Import merges rather than replaces, so re-importing the same file is safe.

How to use

  1. 1

    Browse the list on the left: twenty built-in prompts with category badges such as writing, coding, and analysis.

  2. 2

    Narrow with the Search field (matches titles, descriptions, and prompt text) or the Category dropdown, and click Clear filters to reset both.

  3. 3

    Click any entry to open it in the detail card, then use Copy to send its text to the clipboard or the trash icon to delete it.

  4. 4

    Add your own: click Add prompt, fill Title, Category, Description, and Prompt text (with {{variables}}), then press Save prompt.

  5. 5

    Click Export JSON to back up the collection as prompt-library.json, or Import JSON to merge a file from another machine.

Common use cases

  • Onboard new team members — point them at the twenty built-ins so they start with proven prompts instead of blank textareas.
  • Keep a personal catalogue of battle-tested prompts organised by writing, coding, analysis, creative, and productivity.
  • Share prompt collections across a team — export one JSON file and import it on everyone's machine, with duplicate detection.
  • Standardise output across campaigns — every writer copies the same blog intro hook template and fills its {{variables}}.
  • Store client-specific prompt templates — one entry per client with their voice guidelines baked into the text.
  • Curate prompts for a specific workflow — search "review" or "summary" to assemble a task-specific prompt set in seconds.

Best practices

  • Use {{variable}} placeholders in saved prompts (as the built-ins do) so one library entry serves many jobs — {{topic}}, {{audience}}, and {{language}} turn a prompt into a reusable template.
  • Search the full text, not just titles: the search box also matches prompt bodies, so pasting a keyword you remember from a prompt usually finds it even if the title is vague.
  • Export before heavy editing sessions: the Export JSON button writes the entire collection to prompt-library.json, a cheap backup for localStorage data that a browser cleanup can wipe.
  • Keep built-ins as your starter set and prune only what you truly never use: deleting a built-in is one click and the import file is the only way back.
  • Write meaningful one-line descriptions when adding prompts: the description is what the list and search display, so a specific summary beats a title alone.
  • Share collections with teammates via JSON: the importer deduplicates by title + text, so merging two people's libraries never creates double entries.

Tips

  • The search box matches prompt bodies too — try single words like "checkbox" or "triage" instead of guessing exact titles.
  • Add prompts with {{variables}} from day one: entries become templates, and the built-ins show you the naming style.
  • Export before clearing your browser data — the JSON file is the only way to restore a hand-built collection.
  • Duplicate a built-in by copying it and saving it under your own title, then edit the copy freely while the original stays intact.

Frequently asked questions

Twenty built-in prompts, four per category. Writing covers a blog intro hook, email subject lines, README summaries, and press releases; coding covers review checklists, code explanation, unit tests, and refactoring; analysis covers root cause analysis, competitor comparisons, survey summaries, and risk assessments; creative and productivity add story openers, brand voice guidelines, weekly reviews, and more. Every built-in uses {{variable}} placeholders.

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