You have eight clients. Each one has a different voice, different expectations, different project history, different quirks. Switching between them mid-morning is already a context-switch tax — and then Claude makes it worse.
Because Claude doesn't know any of them. Every conversation starts from zero. You explain who Acme Corp is, remind it about the Q3 deadline, describe the tone they prefer — and then you close the tab and do it all again next time.
This post explains the pattern that fixes it. It takes about 30 seconds to set up. After that, your client knowledge base lives in a store Claude can query any time, without you having to re-brief it from scratch.
Claude's context window is generous. But "generous" and "permanent" aren't the same thing. The moment a conversation ends, everything in it is gone. There's no cross-session memory by default.
For a freelancer managing multiple clients this is a real friction point. You're switching between a branding client, a SaaS startup, a law firm, a charity campaign — each with different audiences, budgets, preferences, and histories. You know all of this. Claude doesn't, and it won't, until you tell it again.
Some people try to keep all that in custom instructions. That breaks down fast once you have more than two or three clients — the instructions get long, vague, and stale.
The fix is simple: give Claude a searchable client knowledge base that persists between sessions. You build it up as you work — one record per client, one record per project, one record per useful fact — and Claude queries it at the start of any conversation where it needs context.
Stash is the tool that does this. It connects to Claude as an MCP connector (think: a small plugin that runs alongside your conversations). You save things in plain language; Claude retrieves them by searching, not scrolling.
Client records don't need to be elaborate. The most useful things to store are:
You don't need to do it all at once. Most freelancers start by saving a one-paragraph briefing for each active client, then fill in the rest as they come up naturally in conversations.
Two weeks later, new conversation:
Claude retrieved that in one query, from a stored record you saved two weeks ago. You didn't re-type anything. You didn't search through old notes. You just asked.
| Record type | Example | When it saves time |
|---|---|---|
| Client briefing | "Acme Corp — B2B SaaS, 50-person team, CFO-focused messaging" | Every conversation involving that client |
| Project status | "Website project: wireframes approved, copy due Friday" | Weekly check-ins, client updates |
| Contacts | "Ben (CEO, final approver), Sarah (comms, day-to-day)" | Before sending anything, prepping for calls |
| Feedback log | "They hated 'cutting-edge' — too buzzword-y. Plain language only." | Drafting, revising, briefing Claude on voice |
| Scope notes | "Retainer: 2 blog posts/month. Ads are out of scope." | Scope creep conversations, invoicing |
| Meeting notes | "Call 14 Jun: they want case studies for manufacturing sector" | Following up, remembering decisions |
One thing that's easy to overlook: once your client records are in Stash, you can search across all of them at once. This turns out to be useful more often than you'd expect.
You're not just storing individual records — you're building a searchable layer over your entire client base. Claude can query it the same way it queries anything: in plain English.
Stash's free tier gives you 2,500 records and 50 queries per month. For a freelancer getting started, that's plenty of room to build out your client base and see if the pattern works for you.
Active freelancers with five or more clients and regular Claude usage typically hit 50 queries in one to two weeks — each client briefing, project status check, or contact lookup counts as one query. When you hit the limit, Stash shows a one-line upgrade prompt. The Pro plan is £8/month, which most freelancers earn back in the time saved on a single morning of client work.
Pricing may change; cancel anytime.
That's it. The first record takes 30 seconds. After that, you build it up as you work.
Free to start. No engineering required. Works with any Google account.
https://app.stashlite.com/mcp