You open Claude to draft an investor update. You need to reference the last conversation with your lead investor — their concerns about burn rate, their ask for better cohort data, the informal commitment to bridge you if you hit 80% of the milestone. That context is in your head, not in any system. So you spend ten minutes re-briefing Claude before you can even start writing.
This is the founder version of the blank-page problem. The information exists — it's just scattered across memory, old Slack threads, and a notes app you stopped opening six weeks ago.
Stash is a hosted record store Claude talks to over MCP. Instead of re-briefing every session, you store the context once and query it on demand. For founders, the return is immediate.
Founders carry a particular kind of knowledge that lives nowhere. It's not product specs (those are in Notion or Linear). It's not financial data (that's in your spreadsheet). It's the relational and decision layer:
| Category | Examples |
|---|---|
| Investor relationships | Lead's specific concerns, last conversation date, terms discussed, what they said at the last board call, promises made |
| Hiring pipeline | Who you're talking to for each role, their current employer, what they want, red flags, referral sources |
| Product decisions | Why you killed a feature, what a pivot was based on, which experiments failed and why |
| Co-founder dynamics | Agreements about roles, areas of friction, decisions reached after hard conversations |
| Customer context | What your five best customers actually want, specific requests, relationship status |
| Board and advisors | Each person's background, what they're useful for, what to ask them, what they've committed to |
None of this fits in custom instructions. All of it has to be re-briefed every time you open a new Claude conversation — unless you store it in Stash.
You don't need to build an elaborate system. Most founders find three collections cover 90% of what they actually re-brief:
You add to these as things happen. A call with a VC → add a record. A product decision → log it. A candidate goes cold → update their record. The overhead is ten seconds per event.
Investor updates are one of the highest-leverage founder writing tasks — and one where context quality matters most. Here's how the workflow looks with Stash:
That workflow — context load, investor fetch, draft — takes ninety seconds. Without Stash, the re-briefing alone takes five minutes and the output is less personalised.
When you're hiring for three roles simultaneously, the cognitive load is brutal. Each candidate has different priorities, different timelines, different red flags. Claude can help you prep for calls, draft outreach, and think through decisions — but only if it knows what's in the pipeline.
One of the most underrated things a founder can do is log product decisions as they happen. Not in elaborate format — just: what was decided, why, what was rejected, who was in the room.
Six months later, when someone asks "why didn't we build X?", the answer is in Stash. When a new hire asks about a product direction, Claude can summarise the decision history. When you're writing a Series A deck narrative, the logic is queryable.
Example decision record: "Killed async video feature, May 2026. Reason: usage data showed <5% of users tried it; support overhead was disproportionate; focus redirected to core search performance. Rejected alternative: partner with Loom instead of building. Rejected because: introduces third-party dependency at wrong stage. Decision owner: both founders."
One record. Thirty seconds to write. Queryable forever.
The free tier gives you 2,500 records and 50 queries per month. For a founder actively tracking investors, candidates, customers, and decisions, fifty queries goes in two to three weeks — a board update, a few hiring prep sessions, a couple of customer strategy sessions.
That's roughly the right point to hit Pro (£8/month). Most founders who use Stash daily find the payback immediate: one better investor conversation is worth the monthly cost many times over.
https://app.stashlite.com/mcpcontext() to load your standing context at the start of any sessionFree tier: 2,500 records, 50 queries/month. Pro: £8/month.
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