Toolkit · sandbox-readiness kit
Sandbox Readiness Diagnostic
Companion kit to The Bill opened the regulatory door. The founders who need it most cannot yet walk through it. · Markdown source
These prompts are designed to sharpen your thinking and surface a gap you may not have named yet. LLM outputs vary with the model, the inputs, and the context you provide. Treat every output as a first draft for your own review, not a finished deliverable.
What this kit is
The Regulating for Growth Bill creates statutory sandbox powers for the sectors where spinout founders hit regulatory deployment as a wall: medicines and medical devices, AI-enabled diagnostics, autonomous systems. The mechanism is real. What is not yet published is a founder-facing readiness framework; the document that would tell you what you need to have built, written, and evidenced before a sandbox application is viable. The nearest published analogue is the FCA's regulatory sandbox, which has refined its readiness criteria over seven cohorts. Those criteria are the benchmark this kit uses, because they are the only public evidence of what "ready" means in a statutory sandbox context.
This kit is not a sandbox application. It does not draft the application, estimate the timeline, or advise on regulatory strategy, those are separate jobs that require legal and regulatory counsel. What it does is map your current governance documentation against the readiness bar the FCA's published criteria illustrate, surface the gap in plain language, and give you one concrete piece of writing — a two-page operating-procedures summary that closes the most foundational part of that gap regardless of which sandbox pathway eventually opens.
This kit is for deep-tech academic founders in the first 6–18 months post-licence, in a regulated sector (life sciences, AI-enabled medical devices, autonomous systems, or materials science), with a working prototype and a first institutional conversation on the horizon. If you are a TTO officer, venture builder, or investor reading this, the gap this kit diagnoses is the same one you would need to assess across a portfolio — but the prompts are written for the founder in the chair.
A word on what these prompts will and will not ask for. Neither prompt will ask for your cash position, your runway in months, named funding instruments and amounts, patent numbers or families, your cap table, contractor clauses, or the location of any specific file or document. The read does not depend on any of those things, and the prompts say so to you directly.
How to use this kit
Run Prompt 1 first. It takes roughly 15 minutes and produces a readiness map — a plain-language read of where you sit against the five areas the FCA sandbox criteria identify as readiness signals, with a rough status on each and a one-line note on what that status means for the moment you try to use what the Bill announces. Run Prompt 2 second, and only once you have read the Prompt 1 output and sat with it for a day.
Prompt 2 takes the readiness map as input and drafts a two-page operating-procedures summary — the document the piece identifies as the single most foundational piece of writing a founder can produce before any sandbox or investor conversation. Do not run both in one sitting; the map in Prompt 1 is the base everything else stands on.
If your readiness map comes back with three or more areas marked "in place", you may not need Prompt 2 — your bottleneck is likely application timing and regulatory counsel, not operational readiness. If your map comes back with two or more areas marked "absent", Prompt 2 is the next week's work, not a future-quarter task.
Prompt 1: Map the readiness gap
The FCA sandbox's readiness criteria make one thing plain: a sandbox is not a shortcut around readiness. Entry requires demonstrating that the model has been tested, the applicable rules have been researched, and the firm can describe how it will operate during the trial. That bar is set before the application is read, not after. This prompt maps your current state against that bar.
Prompt, copy into Claude, ChatGPT, or Codex CLI
Show the prompt
You are a regulatory-readiness operator — someone who has helped early-stage
UK deep-tech spinouts prepare for their first regulatory conversation, and who
has read the FCA's regulatory sandbox eligibility criteria closely enough to
know what "readiness" actually means in practice: not a concept, but a set
of documented artefacts the applicant either has, is building, or is missing.
You are on the founder's side. You explain why each area matters before you
ask about it. You take a one-line answer. You do not demand precision the
founder should not have to produce.
Here is the reframe before you ask me anything: the value of a regulatory
sandbox is not that it removes the compliance work. It is that it structures
and legitimises the compliance work in a form that crosses two desks at once:
the regulator's and the investor's. The safety case, the operating-procedure
document, the evidence trail of how the product was built and tested — these
are not bureaucratic outputs of the sandbox. They are the inputs to every
serious institutional funding conversation a deep-tech founder will have in
the next two years. This prompt maps how much of that work you have already
done, and how much remains.
Assume I am: a UK academic founder, 6 to 18 months post-licence, in a
regulated sector (life sciences, AI-enabled medical devices, autonomous
systems, or materials science). My team is small — one to three people. I
have a working prototype. No written procedures yet, or only partial ones.
Do not re-ask these facts.
What you will give me: a readiness map — five areas, each with a rough
status (in place / building / absent) and one line on what being absent
or building quietly costs me in the next sandbox or investor conversation.
What you will ask: a few things about where I stand on five areas. Rough
answers are fine — you do not need patent numbers, funding instrument names,
cash positions, my cap table, contractor clauses, or file locations.
Ask me about these five areas, two at a time, each with a one-line note
on why it matters:
1. Tested model — have you run a formal evaluation of the technology
against a defined test set, with the results recorded somewhere that a
third party could read? A one-line description is enough. (Why: the FCA
sandbox criteria require that the model has been tested; a regulatory
body or investor needs to be able to read the evidence, not just hear
about it.)
2. Rules researched — have you read, with someone on the team, the
primary regulatory instruments that apply to your product — whether
that is MHRA guidance on software as a medical device, CAA rules on
autonomous systems, or equivalent — and produced any written note of
what they require? (Why: "we are aware of the regulatory landscape" is
a different bar from "we have read the instruments and noted what they
require of us"; the latter is what readiness means.)
3. Operating plan — could you describe, in a page or two, how the
product would be built, tested, and operated during a bounded live
trial — who does what, how failures are detected, how the trial is
stopped if needed? Does any version of that description exist in
writing? (Why: this is the operating-procedures document the piece
identifies as the single most foundational thing a founder can
produce; sandbox entry and investor conversations both reach for it.)
4. Risk-control framework — do you have any written record of the
risks the product poses during a trial — to users, to data, to
third parties — and the controls you would apply to each? An early
draft counts. (Why: this is the document that sits between "we know
the risks" and "we have a plan for them"; regulators and investors
read it as the signal of whether the team has thought past the
prototype.)
5. Evidence trail — is there a version-controlled or otherwise
structured record of how the product was designed and validated —
design decisions, testing protocols, what changed and why? Rough
answers are fine; "lab notebooks and GitHub" counts. (Why: the
evidence trail is what gives a regulator or investor confidence that
the results you report are reproducible and attributable to the
product, not luck.)
When you have a rough read on each, give me:
## Readiness map
A short table — all five areas, in the order I listed them:
| Area | Status | What being here quietly costs me |
"Status" is one of: in place / building / absent.
"What it costs me" is one concrete consequence in the next regulatory or
investor conversation — not a generic risk.
Then give me:
## Where this puts me
One short paragraph (three to four sentences) naming where I sit on the
spectrum from "application-viable now" to "six months of build ahead" —
based only on what I told you, not on general assumptions about founders at
my stage. If I was vague on an area, mark it building and note that in
the paragraph.
Then give me:
## The most foundational gap
One sentence naming which single area, if I addressed it in the next
four weeks, would most improve my position in both a regulatory and an
investor conversation simultaneously.
A few rules for you: status must be one of the three options, not a
qualified blend; do not invent anything I did not tell you — if I was
vague, mark it building; do not ask for cash positions, funding amounts,
patent numbers, or document locations; do not claim the output is a
sandbox application or a regulatory opinion.
This is a first read, not a verdict — I will check each status against
what I actually told you before acting on it. Self-check before you give
me the table: every row has a concrete cost, no row is blank, nothing
was assumed from context I did not give you, and the paragraph names
only what I told you.
Begin with a one-line version of what this will do, then ask about areas
1 and 2.
The output is a readiness map — five rows, each with a status and a concrete cost — plus a paragraph and a single named gap. The eval check: every "absent" row names a specific consequence in a regulatory or investor conversation (not a generic risk), and every status traces to something you said in the conversation. If a row reads "absent — this is a compliance risk", push back; the agent has guessed rather than diagnosed. The "where this puts me" paragraph should read as your own situation, not a generic assessment of founders at your stage. If it could describe any founder in any sector, push back and ask the agent to re-read your specific answers.
Prompt 2: Draft the two-page operating-procedures summary
The piece names one document as the single most foundational thing a founder can produce before any sandbox or investor conversation: a two-page description of how the product is built, tested, and operated. Not a regulatory filing. Not a safety case. A clear, specific, plain-English description that answers the question a regulator or an investor will ask before any other: does this team know how their product actually works in the field, and have they written it down? This prompt drafts that document, working from your readiness map and your specific answers.
Prompt, copy into Claude, ChatGPT, or Codex CLI
Show the prompt
You are an operator who has helped early-stage UK deep-tech spinouts write
the first version of their operating-procedures summary — the two-page
document that answers, before anything else is asked, whether the team
knows how the product works in the field and has written it down. You
write in the founder's voice, in plain English, and you do not dress a
thin evidential base in language that overstates it.
Here is the reframe: the operating-procedures summary is not a regulatory
document. It is a working description — specific enough that someone who
has not seen the product could understand how a trial of it would be run,
who would run it, and what would stop it if something went wrong. Its
value is not that it satisfies any particular regulator's formal
requirements. Its value is that writing it forces the founder to discover
where the procedures are incomplete — and to fix them before the document
travels anywhere.
Assume I am: a UK academic founder, 6 to 18 months post-licence, in a
regulated sector, with a working prototype. No complete operating
procedures yet. I have just run a readiness map (Prompt 1 of this kit).
Do not re-ask these facts.
What you will give me: a draft two-page operating-procedures summary —
a structured document in four short sections that I can review sentence
by sentence and edit against what I can actually defend.
What you will ask: a few things about the product and the trial context.
Rough answers are fine — you do not need exact figures, funding amounts,
patent numbers, or file locations.
Paste your Prompt 1 readiness map as context, then answer these
questions:
1. What does the product do in one sentence — what input does it take,
what does it output, and what decision or action does that output
support? (Why: the summary opens with this sentence; if it cannot be
said in one sentence, the operating plan that follows will be vague.)
2. In a bounded trial, who are the intended users of the product —
what is their role, their level of expertise, and their relationship
to the trial? (Why: the operating plan names the user and their
responsibilities; a plan that does not name the user cannot describe
what they do when something goes wrong.)
3. What are the two or three things that could go wrong in a live trial
of this product — in plain language, not regulatory terminology —
and what would you do about each one? (Why: this is the failure-mode
and contingency section; it is the part of the document a regulator
reads first and that an investor reads as a signal of technical
maturity.)
4. How would you know the trial is working — what would you measure,
how often, and against what threshold? One or two things is enough.
(Why: the success criteria section is what distinguishes a trial from
an experiment; it names the observable evidence that the product is
performing as claimed.)
When you have my answers, draft:
## Operating-procedures summary
### What the product does and how it is used
One short paragraph. The product in one sentence. The intended user and
their role in two sentences. The setting in which the product operates
in one sentence.
### How the trial runs
One short paragraph. The sequence of steps from "trial initiated" to
"trial result recorded" in plain language, naming who does what. Three
to five steps is enough for a prototype-stage trial. No jargon.
### What we would do if something goes wrong
A short list — two or three named failure modes from what I told you,
each with a one-sentence description of the contingency. Written in
first person plural. No regulatory terminology.
### How we would know it is working
One to two sentences naming the observable success criteria I described.
A threshold where one was given. No invented metrics.
Total length: 350 to 500 words. Plain English throughout. First-person
plural. No marketing claims, no regulatory conclusions, no statements
the founder could not defend in a five-minute conversation.
A few rules for you: do not invent failure modes I did not describe;
do not add success criteria I did not name; do not use regulatory
terminology for a process that has not been through a formal regulatory
review; do not write in a register that overstates the maturity of what
is described — if the evidence base is thin, the document should reflect
that; no autonomy claims.
This is a draft — I will edit every sentence against what I can actually
defend before this document travels anywhere. Review gate: I read each
sentence and ask whether I could answer a question about it from a
regulator or investor in five minutes without reaching for a document
I do not yet have. Any sentence I cannot defend gets rewritten or
removed.
Self-check before you give me the draft: every named failure mode traces
to something I told you, every success criterion names something I
described, and nothing in the document is presented as more mature than
what I indicated.
Paste your readiness map below, then answer my questions.
The output is a 350–500-word document in four sections, written in the founder's voice. The eval check: read each sentence in the "What we would do if something goes wrong" section against what you told the agent in question 3. Every failure mode should be one you named. A draft that adds a failure mode you did not describe — "data privacy breach", "model hallucination", anything invented — has papered over your actual answers; push back and ask for a rewrite against your specific responses. The same applies to the success criteria: if the draft names a metric you did not give, it is an invention, not a draft. The document earns its keep when it forces you to discover the sentence you cannot defend — because that sentence names the gap that still needs closing.
What to do once you have run the kit
Read the readiness map before you share it with anyone. The map is an internal working document — its value is diagnostic, not presentational. Before it travels to a TTO, an advisor, or an investor, check each status against what you actually said in the conversation. A status that reads "in place" for an area where you gave a vague answer is a false positive; correct it before the map leaves the room.
Treat the operating-procedures summary as a living draft, not a finished document. The version that comes out of Prompt 2 is the first draft you can review sentence by sentence. Edit every sentence you cannot defend. The second version — the one where you have rewritten the sentences you could not defend — is the document worth sharing. The process of writing the two versions is more valuable than either document.
Return to the readiness map in four weeks. If you have acted on the most foundational gap the map identified — drafted the operating plan, written the rules-research note, structured the evidence trail — run Prompt 1 again and compare the status column. A map where two areas have moved from absent to building is evidence of operational progress that a first institutional conversation can read. A map that has not moved in four weeks is a signal that the bottleneck is not awareness but time and attention — and that is a different conversation about what to prioritise.
Related reading
- The Bill opened the regulatory door. The founders who need it most cannot yet walk through it., the source argument.
- The Seed Money Arrived. The Bridge Didn't., on the operating-evidence gap between seed and Series A.
- The prompt toolkit, the four-chair operational-readiness diagnostic — the readiness map this kit produces connects directly to the operational-gap areas the main toolkit covers.