Madlibs

Madlibs make prompt-writing easier by breaking a task into structured input fields. Instead of composing a full instruction from scratch, users fill in variables such as names, product details, or tone. This reduces errors and keeps outputs consistent across a team.

For example, an AI might draft an email using a template where the recipient’s name and context are supplied directly, avoiding mistakes like misaddressed messages.

This pattern works best when the task is known, the inputs are predictable, and the process repeats often. Creating a product requirements document, drafting release notes, or writing standard outreach emails all fit this mold. The underlying structure is fixed, but specific values shift each time.

By shaping the input up front, madlibs shift the work from correcting outputs to guiding inputs. This makes runs more reliable, and gives teams a shared library of prompts that match their brand and workflows.

Setting them up

Madlibs are formatted as a collection of inputs and variables. Users specify their prompt but leave some inputs open-ended that the user will fill out. For example, a PRD template may include a link to a collection of insights by customers about a specific product area. They can be as simple as including a single reference link, or they can use multiple sources built via integration.

Putting them to work

Madlibs are commonly seen in workflows. The user may enter a trigger (or it may be automated), and the rest of the workflow fires off seamlessly. Examples could include syncing notes from a meeting captured in Gong into Salesforce notes.

Workflows are set up to run off of information integrated from other sources as well as AI-generated information

These are used in templates to unblock users getting started with content generation. Writer.com and Copy.ai are good examples of how this can be used to build a prompt library within your company. Details like tone of voice, audience, and so on only need to be captured once and put into the prompt template.

Design considerations

  • Let the context determine the flexibility. A Madlib can feel like a form that forces exact inputs or like a suggestive scaffold. Rigid inputs drive consistency, but they can frustrate when the task requires nuance. Flexible fields invite creativity, but risk sloppy outputs. Pick the balance based on whether the pattern is used for repeatable workflows or for creative drafting.
  • Clarify which inputs are critical and which are optional. If everything looks equal, users may waste time filling in unnecessary fields. Make critical variables prominent and give clear signals about what can be skipped. This keeps the experience fast and reduces cognitive load.
  • Show the underlying prompt structure. Hiding the “bones” of the template makes madlibs feel magical but opaque. Exposing the structure helps users learn and adjust. Consider whether your audience values transparency (teams building prompt libraries) or simplicity (casual users who just want results).
  • Plan for multi-step reuse. A single madlib can carry information forward into later outputs (brief → outline → draft). Designers should think about what gets locked at each step versus what can be revised or carried forward.
  • Treat Madlibs as a teaching tool. They aren’t just time-savers. Well-structured Madlibs show novices how to phrase strong prompts and give experts reusable scaffolds. Decide how much you want the madlib to “train” the user versus simply produce outputs.

Examples

Coda shows an experimental approach to madlibs that relies on sliders instead of specific inputs in the variables of a madlibs input
Google put together this concept of a simple prompt builder using madlibs to let users easily select from a clear set of defaults, or construct their own inputs
Relay uses madlibs in their agent instruction steps, filling in variables with other context from the workflow
Writer shows another example of making it easy for any user to benefit from a strong prompt without knowing how to construct it by focusing only on the variables using madlibs