Custom GPT for Creative Agency

A custom ChatGPT bot built for Instrument that answers questions about the agency's culture, leadership, values, and case studies — pulling live data from internal Google Docs via a custom function.

What if a creative agency had its own AI that actually knew the place — the culture, the clients, the case studies? That’s the idea behind this v1 build: a custom GPT tuned specifically for Instrument, designed to help anyone quickly get up to speed on who the agency is and what they’ve made.

How it works

The bot is configured with a few layers of knowledge. First, PDF files covering culture, leadership, and about pages are uploaded directly as GPT knowledge — so it can answer questions like “who leads Instrument?” or “tell me about the culture” without needing to browse the web. Second, and more interestingly, a custom function connects to a Google Doc that aggregates case study summaries. When someone asks about client work — say, Nike — the bot calls that function, pulls the relevant summaries, and synthesizes a response on the fly.

This same Google Doc pipeline already powers an internal Brief Buddy tool used by the business development team, so the infrastructure was already trusted and maintained. Plugging the GPT into that same source means case study answers stay current without any extra maintenance work.

The guardrails

One thing worth noting: the instructions explicitly tell the bot not to search the broader internet. It only references uploaded knowledge files and the connected case study doc, and it’s prompted to clearly say when it doesn’t have specific information. That kind of scoping is important — you want an agency bot to be accurate and on-brand, not confidently hallucinating project credits.

Why it matters

This is a pattern that scales. Most agencies, studios, and product teams are sitting on a goldmine of internal documentation that’s hard to navigate. A tuned GPT with the right knowledge files and a live data function becomes a low-friction onboarding tool, a pitch prep assistant, or a culture reference for new hires. The personality layer isn’t fully baked in this v1 — that’s the obvious next step — but the infrastructure for a genuinely useful internal AI agent is already there.