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Case Study

Achieved 94% weekly AI adoption by implementing a Prompt Library

Client

Design & Marketing Agency

Size

60+ staff

Completed

2025

Employee using computer monitor

Client Overview

A medium-sized design and social media agency, based in Bristol, wanted to move beyond ad-hoc AI use and make AI a safe, consistent, team-wide capability - rather something only a few “power users” could benefit from.

The Challenge

After an initial AI training rollout, one blocker kept showing up - especially among junior content staff:

  • Prompting felt like extra work: people wanted to use ChatGPT more, but the time spent writing “good prompts” often cancelled out the benefit.
  • No shared knowledge of what worked: teams didn’t know which prompts colleagues were using, so everyone was effectively starting from scratch.
  • Inconsistent outcomes: even when AI was used, results varied widely because there wasn’t a consistent starting point for quality, tone, and structure.

The agency needed a way to make good prompting instant, repeatable, and shareable across the whole company.

Our Approach

AgencyTech treated prompting like a workflow asset - something to standardise and distribute the same way you would templates, brand guidelines, or operating procedures.

We focused on three things:

  1. Reduce friction to near-zero (so using AI feels faster than not using it)
  2. Make high-quality prompts visible across the business (so knowledge doesn’t stay “in people’s heads”)
  3. Create a system that scales (so the library improves over time, not just at launch)

The Solution

A custom-built Prompt Library app integrated with Google Workspace and ChatGPT, designed for fast daily use.

Key elements delivered:

  • Role/department-based organisation (Creative, Content, Client Success, Finance, Account Management, etc.) so staff can browse what’s relevant instantly
  • Search + categories to find the right prompt in seconds
  • Launch library of 40 high-impact prompts, curated around real workflows (emails, briefs, reporting insights, captions, proposals, summaries)
  • Client-safe tailoring by referencing internal tone-of-voice documents to steer outputs without reinventing prompts every time
  • Submission + approval workflow: staff can contribute new prompts, with admin approval to maintain quality and consistency

Net result: AI became a shared capability - not a personal hobby.

The Results

Measured via verified app usage stats and a short internal pulse survey.

  • Weekly adoption: 94% of survey respondents reported using the Prompt Library weekly
  • Usage validation: app analytics showed consistent weekly active usage across the majority of the 60-person team
  • Efficiency gains: users reported reclaiming time primarily through faster first drafts, fewer rewrites, and less “blank page” prompting (aligned to ~4 hours/week per person)
  • Quality uplift: respondents reported outputs were more concise, more usable, and closer to “client-ready” on the first pass
  • Scalability: contributions increased over time through the submit → approve → publish loop, meaning the library improved as adoption grew

Key Takeaways

We turned AI prompting into a shared, searchable system - making high-quality outputs faster, more consistent, and scalable across the business.