Quick answer

You can use Maccy as a lightweight prompt library by copying each prompt you reuse and pinning it in Maccy App. Pinned items stay at the top of your clipboard history, searchable by typing, and paste into ChatGPT, Claude, or any other app with a keyboard shortcut. It’s best for 10 to 25 frequently used prompts, and it has no templates or variables.

Why a clipboard manager works for prompts

Most people’s “prompt library” is a Notes file, a Notion page, or a pile of old chats they scroll through to find the one that worked. The friction is the same each time: switch apps, find the prompt, select it, copy it, switch back, paste.

A clipboard manager collapses that into one motion. You press a shortcut, type two or three letters, and press Return. Nothing leaves your Mac, which matters when your prompts reveal how you work, what you work on, or what your employer cares about.

Maccy Mac is a good fit because it’s deliberately small: it’s free, open source, keyboard-driven, and stores history locally. That’s also its limitation. It isn’t a snippet manager, and this guide is honest about where that matters.

Set up Maccy for prompts in five minutes

1. Install Maccy from the official site or the project’s GitHub releases, or with Homebrew (brew install maccy).
2. Open the popup with the default shortcut, Shift+Command+C. You can change it in Maccy’s Settings.
3. Copy a prompt from wherever you keep it (or write it in any text field and copy it).
4. Pin it: open Maccy, highlight the item, and press Option+P. A pinned item moves to the top and is assigned a shortcut key.
5. Raise your history limit if you also use Maccy for ordinary copying, so pinned prompts never compete with a crowded history.

From then on, the loop is: open Maccy Clipboard → type a few letters of the prompt → Return. Maccy searches as you type, so prompts that begin with a distinctive tag (see the naming tip below) are found in two or three keystrokes.

The one naming habit that makes this work

Maccy previews the beginning of each item. Start every prompt with a short tag in brackets, for example [edit], [summarize], [review]. Then typing “edit” in Maccy’s search box surfaces the right prompt instantly, and the pinned list stays scannable.

Twelve reusable prompts worth pinning

These are tool-agnostic and work in both ChatGPT and Claude. Replace the bracketed placeholders after you paste. Adjust the wording to your own voice, because a prompt you’ve tuned is worth more than a generic one.

Writing and editing

1. [edit] Tighten without changing voice

[edit] Edit the text below for clarity and concision. Keep my voice and meaning. Remove filler, fix grammar, and flag any sentence you think is unclear instead of silently rewriting it. Return the edited text, then a short list of what you changed.

TEXT:
[PASTE TEXT HERE]

2. [rewrite] Change tone, keep facts

[rewrite] Rewrite the text below in a [TONE: e.g. direct and friendly] tone for [AUDIENCE]. Do not add facts, claims, or numbers that are not in the original. Keep it under [N] words.

TEXT:
[PASTE TEXT HERE]

3. [summarize] Summary with decisions and open questions

[summarize] Summarize the text below in 5 bullets or fewer. Then list (a) decisions made, (b) action items with owners if stated, and (c) open questions. If something is not in the text, say "not stated" instead of guessing.

TEXT:
[PASTE TEXT HERE]

Thinking and research

4. [critique] Find the weak spots

[critique] Act as a skeptical reviewer. Read the argument below and list the three weakest points, the assumptions it depends on, and what evidence would change your mind. Be specific. Do not flatter.

ARGUMENT:
[PASTE TEXT HERE]

5. [explain] Explain at the right level

[explain] Explain [TOPIC] to someone who knows [WHAT THEY ALREADY KNOW] but not [WHAT THEY DON'T]. Start with the one-sentence version, then build up. Use one concrete example. Tell me what people commonly get wrong.

6. [compare] Decision table

[compare] Compare [OPTION A] and [OPTION B] for [MY SITUATION]. Give a table with the criteria that matter for this situation, then a recommendation and the conditions under which you'd change it. State any assumptions you're making.

Code and technical work

7. [review] Code review

[review] Review the code below as a senior engineer. Prioritize: correctness bugs, security issues, then maintainability. For each issue give the line or function, why it matters, and a minimal fix. Do not rewrite the whole file.

LANGUAGE/FRAMEWORK: [WHICH]
CODE:
[PASTE CODE HERE]

8. [debug] Structured bug report

[debug] I have a bug. Help me find the cause before suggesting fixes.

Expected: [WHAT SHOULD HAPPEN]
Actual: [WHAT HAPPENS]
Environment: [macOS VERSION, LANGUAGE, VERSIONS]
Error output:
[PASTE ERROR HERE]
Relevant code:
[PASTE CODE HERE]

First list the 3 most likely causes ranked by probability, and what to check to confirm each.

9. [regex] Regex with tests

[regex] Write a regular expression for [GOAL] in [FLAVOR: e.g. PCRE, JavaScript, ICU]. Explain each part, give 5 strings that should match and 5 that should not, and mention any edge cases it handles poorly.

Work and communication

10. [reply] Draft a reply

[reply] Draft a reply to the message below. My goal: [GOAL]. Constraints: [e.g. polite, no commitments on dates]. Keep it under [N] sentences. Give me two versions: one warmer, one more brief.

MESSAGE:
[PASTE MESSAGE HERE]

11. [meeting] Notes to action list

[meeting] Turn these raw meeting notes into: a 3-sentence recap, a list of decisions, and a table of action items (task, owner, due date). If an owner or date is missing, write "unassigned" rather than inventing one.

NOTES:
[PASTE NOTES HERE]

12. [system] Reusable role prompt for a long session

[system] For this conversation: be concise, ask one clarifying question if my request is ambiguous, tell me when you are unsure rather than guessing, and prefer plain language over jargon. If I paste text without instructions, ask what I want done with it.

Maccy vs. other places to keep prompts

Maccy is one option among several, and it’s strongest in a specific slot.

A practical split: put who you are and how you like answers in custom instructions or a Project, and put reusable task prompts in Maccy.

Honest limitations

• No placeholders. Maccy pastes text verbatim, so you edit the bracketed parts by hand. If you need fill-in fields, a snippet tool is the better fit.
• No folders or tags. Organization comes from the leading [tag] and from search. Past about 25 pinned items, you’ll rely on search more than scanning.
• Long prompts preview poorly. The menu shows the start of an item, so put the identifying tag first.
• No cross-device sync. The history is local to your Mac. That’s a privacy feature, but it means your library doesn’t follow you to another machine. Keep a master copy in a file you back up.
• It’s a clipboard, not a source of truth. Keep the canonical version of each prompt in a text file or repo, and treat Maccy as the fast-access layer.

Privacy: what belongs in a pinned prompt

A pinned prompt should be reusable, which means it should be generic. Don’t pin text that contains client names, credentials, personal data, or internal documents. Paste those into the chat directly when needed.

Also remember that your clipboard history contains everything you copy. If you work with sensitive material, open Maccy’s Settings and review the Ignore options to exclude specific apps (such as your password manager) from being recorded. Maccy keeps its data on your Mac, but local storage is not a reason to be careless with secrets.

Tips for getting better prompts, not just faster ones

• Version your winners. When a prompt gets a clearly better result after tweaking, replace the pinned copy and update your master file.
• Prune monthly. If you haven’t used a pinned prompt in a month, unpin it. A short list is faster than a complete one.
• Tell the model what to do when it doesn’t know. Phrases like “say ‘not stated’ instead of guessing” appear in several prompts above for a reason: they reduce invented details.
• Test across tools. The same prompt can behave differently in ChatGPT and Claude. Keep a note next to your master copy if one needs a tweak.

Frequently asked questions

Can Maccy store prompts for ChatGPT and Claude?

Yes. Copy a prompt, open Maccy, and pin it. Pinned items stay at the top of the history and aren’t pushed out by new copies. You can then paste them into ChatGPT, Claude, or any other app.

Is Maccy better than ChatGPT custom instructions or Claude Projects?

They solve different problems. Custom instructions and Projects hold persistent context inside one product. Maccy holds task-specific prompts you paste into any tool. Most people use both.

Does Maccy support variables or placeholders in prompts?

No. Maccy pastes text exactly as stored. The usual workaround is to write placeholders in square brackets, such as [PASTE TEXT HERE], and fill them in after pasting.

Is it safe to keep prompts that contain private data in a clipboard manager?

Maccy stores history locally on your Mac and has no cloud sync. Still, keep reusable prompts generic and leave sensitive data out of pinned items. You can also exclude specific apps in Maccy’s Ignore settings.

How many prompts can I realistically keep in Maccy?

A pinned set of roughly 10 to 25 prompts is comfortable. Beyond that, search becomes your main way in, and a dedicated snippet or text-expansion tool may serve you better.

The bottom line

A prompt library only helps if reaching for it is faster than retyping. Maccy gets that loop down to a shortcut, a few letters, and Return, without an account, a subscription, or your prompts leaving your machine. Start with the three prompts you retype most often, pin them with a leading tag, and add others only when you notice yourself wanting them.

Download Maccy if you haven’t yet. It’s free and open source. And a question worth asking yourself: which prompt have you typed from scratch more than three times this week?