Introduction

The Recipe Pattern is a way to deep dive on an high-level set of instructions to discover a define more specific steps. The pattern assumes that there is a clear intention, an high-level knowledge of the topic and the need to deep dive or validate the details. The pattern is mostly focused on “searching” or confirming the general ideas.

The Prompt

A well-known definition is the following:

-I would like to achieve X
-I know that I need to perform steps A,B,C
Provide a complete sequence of steps for me
Fill in any missing steps
(Optional) Identify any unnecessary steps

In this way the objective of the request is defined at the beginning, some high level instructions are given as a path and conditions are defined.

An example can be the following one:

I would like to apply for UK citizenship as I living in UK. I know that I need to take tests, submit documents and provide my passport Provide a complete sequence of steps for me Fill in any missing steps

The outcome of the prompt will be a quite detailed and, hopefully, correct list of actions

How to play with the prompt

Put the prompt in the LLM with a real, identifiable problem and answer to the other questions.

Some Tests

ChatGPT 5.2

ChatGPT 5.2 provides an exaustive checklist based on the prompt above.

Below is a complete, end-to-end sequence for applying for UK citizenship (naturalisation as a British citizen), with all missing steps filled in and notes where choices depend on your situation.

1. Check that you are eligible (before doing anything else)

You must meet all of the following (most common route):

Immigration status

You must have one of these:
	•	Indefinite Leave to Remain (ILR), or
	•	EU Settled Status, or
	•	Permanent Residence (older EU documents)

And you must have held it for:
	•	12 months, unless you are married to or in a civil partnership with a British citizen (then no 12-month wait).

Residency requirements
	•	Lived in the UK for:
	•	5 years (standard), or
	•	3 years (if married to a British citizen)
	•	Not absent from the UK more than:
	•	450 days in the last 5 years (or 270 in last 3)
	•	90 days in the last 12 months

Other requirements
	•	Aged 18 or over
	•	Good character (no serious criminal record, immigration breaches, unpaid taxes, etc.)
	•	Sufficient English language ability
	•	Passed the Life in the UK Test

👉 Do not apply until all eligibility conditions are met.

2. Prepare for and pass the required tests

A. Life in the UK Test
	•	Book online
	•	Cost: £50
	•	Bring:
	•	Your passport or
	•	Biometric Residence Permit (BRP)
	•	Study from the official Life in the UK handbook
	•	You receive a pass reference number (you must include this in your application)

B. English language requirement

You must meet ONE of these:
	•	Pass an approved English test at B1 level or higher, or
	•	Have a UK degree, or
	•	Have a degree taught in English (UK ENIC confirmation needed), or
	•	Be a national of a majority English-speaking country

⚠️ Tests must be from an approved provider and still valid.

3. Gather all required documents (before applying)

You will typically need:

Identity & immigration
	•	Current passport (mandatory)
	•	All previous passports covering your qualifying period (if available)
	•	BRP or proof of ILR / Settled Status

Residency evidence (if requested)
	•	Employer letters
	•	P60s
	•	Council tax letters
	•	Utility bills
	•	HMRC records

Test evidence
	•	Life in the UK pass reference
	•	English language test certificate or degree evidence

Referees

You need 2 referees:
	1.	British citizen, professional status (e.g. teacher, manager, accountant)
	2.	Any nationality, professional status

Rules:
	•	Over 25
	•	Known you at least 3 years
	•	Not related to you
	•	Not your solicitor or immigration adviser

You will need:
	•	Their full details
	•	Signatures (digital or physical depending on method)

4. Complete the online application
	•	Apply online via the UK naturalisation (Form AN)
	•	Answer carefully:
	•	Travel history (exact dates)
	•	Employment history
	•	Addresses
	•	Immigration history
	•	Upload documents when prompted
	•	Pay the application fee

Fees (approximate)
	•	Application: £1,580
	•	Biometrics: £19.20
	•	Extra services (optional): scanning help, priority slots

⚠️ Fees are non-refundable, even if refused.

5. Book and attend your biometric appointment

After submitting:
	•	Book an appointment at a UKVCAS centre
	•	Provide:
	•	Fingerprints
	•	Photograph
	•	Upload documents yourself or pay for scanning assistance

Your passport is not taken away permanently.

6. Submit referees’ confirmation

Depending on the process used:
	•	Referees may:
	•	Sign a declaration page
	•	Confirm digitally

Make sure this step is completed promptly, or your application may be delayed.

7. Wait for a decision
	•	Typical processing time: up to 6 months
	•	During this time:
	•	You can stay in the UK
	•	You can travel using your current passport and status
	•	You may be contacted for:
	•	More documents
	•	Clarifications

8. Receive the decision

If approved

You will receive:
	•	An approval letter/email
	•	Instructions to book a citizenship ceremony

If refused
	•	You will receive reasons
	•	No refund
	•	Possible re-application after addressing issues

9. Attend the citizenship ceremony (mandatory)
	•	Must attend within 3 months
	•	Ceremony includes:
	•	Oath or affirmation of allegiance
	•	Pledge to the UK
	•	You receive:
	•	Certificate of Naturalisation

⚠️ You are not British until this ceremony is completed.

10. Apply for a British passport (after ceremony)

Only after receiving your certificate:
	•	Apply for a British passport
	•	Send:
	•	Certificate of Naturalisation
	•	Your passport photos
	•	Once received:
	•	You may no longer use your old immigration status

11. Final follow-up steps (often missed)
	•	Inform:
	•	Your employer
	•	Local council (if needed)
	•	Home Office (if holding a BRP)
	•	Check if your original nationality allows dual citizenship


Summary Flow (Quick View)
	1.	Confirm eligibility
	2.	Pass Life in the UK test
	3.	Meet English requirement
	4.	Gather documents
	5.	Complete online application
	6.	Pay fees
	7.	Attend biometrics
	8.	Referees confirm
	9.	Wait for decision
	10.	Attend ceremony
	11.	Apply for British passport

The interesting part is the summary at the end of the response, a sort of checklist of the steps identified.

but…

Claude - Haiku 4.5

With the same sequence of questions and answers Claude Haiku 4.5 provides the same reason. Intersting note Claude clarifies that it had searched across internet to provide the most updated info

I'll search for the current official UK citizenship application process to make sure I provide you with the most up-to-date and complete information.Based on the official UK Home Office guidance, here's the complete sequence of steps to apply for UK citizenship (British naturalisation):

 Before You Apply – Check Eligibility

You must hold Indefinite Leave to Remain (ILR) for at least 12 months (unless married to a British citizen, in which case you can apply immediately after ILR). Most people need to have lived in the UK for at least five years, or three years if married to a British citizen. You'll also need to check your absences from the UK don't exceed the allowed limits.

Step-by-Step Application Process

**1. Pass the Life in the UK Test**
You must pass the Life in the UK Test, which lasts up to 45 minutes with 24 questions and requires a score of 75% or more. You'll receive a unique reference number upon passing. Book this through the official test centre and pay the test fee.

**2. Demonstrate English Language Proficiency**
You must demonstrate knowledge of English, Welsh, or Scottish Gaelic, unless you're aged 65 and over or have a long-term physical or mental condition preventing you from doing so. This is typically proven through an approved qualification or test.

**3. Gather Your Documents**
Prepare evidence including your current and old passports (covering your time in the UK), proof of ILR or Settled Status, residency evidence (such as council tax bills, tenancy agreements), travel records, and your Life in the UK test reference number. If you have driving license penalty points, print a summary of your record from the DVLA website.

**4. Identify Your Referees**
You'll need two British referee declarations from people who can vouch for your identity and character. Choose two people who have known you well and are preferably British citizens or long-term UK residents.

**5. Confirm Good Character Status**
Review your background carefully. The Home Office may decide you're not eligible if you've broken conditions of your leave, claimed public funds without permission, or travelled to the UK on a dangerous journey without authorization. Be honest about any criminal convictions or traffic offences.

**6. Complete Form AN Online**
Visit GOV.UK and complete the citizenship application form AN. Upload all your documents and pay the application fee of £1,605, plus £50 for the Life in the UK test and an £80 ceremony fee. (Note: the total is approximately £1,735 for adults).

**7. Attend a Biometrics Appointment**
After submitting your application, you'll be asked to make an appointment at a UK Visa and Citizenship Application Services (UKVCAS) service point to provide your fingerprints and photograph. Download and save your application before this appointment.

**8. Wait for Home Office Decision**
The Home Office aims to decide most cases within six months from your biometric appointment. Processing begins once biometrics are confirmed along with correct fee payment and mandatory documents. The Home Office will verify your information against various government databases during this time.

**9. Attend Your Citizenship Ceremony**
If approved, you'll be invited to a citizenship ceremony where you'll take an oath of allegiance and receive your certificate of British citizenship. You must book and attend this within three months of your approval letter.

**10. Apply for Your First British Passport**
Once you've received your certificate of naturalisation, you can apply for your first British passport.

Important Notes

You can leave the UK while waiting for a decision as long as you hold valid immigration status, but avoid extended trips as you'll need to attend your ceremony within three months of approval. You won't have your passport taken for naturalisation applications—you can retain it provided you've submitted a certified copy or clear scan.

The process typically takes 6-8 months total from application to ceremony. Be thorough with your documentation to avoid delays.

but…

Mistral

Mistral provides a shorter list of steps but, comparing them, they are coherent with other LLM and, more importantly, they seem correct

Here’s a complete, step-by-step guide to applying for UK citizenship (naturalisation) as of December 2025. This process assumes you are an adult applying based on residence in the UK.

 1. **Check Your Eligibility**
- **Residency:** You must have lived in the UK for at least 5 years (or 3 years if married to a British citizen).
- **Indefinite Leave to Remain (ILR):** You must have held ILR (or EU Settled Status) for at least 12 months before applying.
- **Absences:** You must not have spent more than 450 days outside the UK in the 5 years (or 270 days in the 3 years if married to a British citizen), and no more than 90 days in the last 12 months.
- **Good Character:** You must not have any serious criminal convictions or immigration fraud.

2. **Prepare for the Life in the UK Test**
- **Book and Pass the Test:** You must pass the Life in the UK Test. Book it online at [gov.uk/life-in-the-uk-test](https://www.gov.uk/life-in-the-uk-test).
- **Study:** Use the official handbook, “Life in the United Kingdom: A Guide for New Residents.”

3. **Prove Your English Language Skills**
- **Requirements:** You must prove you can speak and listen to English at B1 CEFR level or higher.
- **Exemptions:** If you are from a majority English-speaking country or have a degree taught in English, you may be exempt.
- **Approved Tests:** IELTS, Trinity College London, or other approved tests.


 4. **Gather Required Documents**
- **Identity:** Your current passport and any previous passports.
- **Residency:** Your Biometric Residence Permit (BRP) or ILR documentation.
- **Proof of Residency:** Council tax bills, bank statements, or letters from employers covering the last 5 years.
- **English Language Proof:** Test certificate or degree certificate.
- **Life in the UK Test Pass:** Your test pass notification letter.
- **Marriage Certificate:** If applying as a spouse of a British citizen.
- **Two Referees:** One must be a professional (e.g., doctor, lawyer, teacher), the other can be any British citizen over 25.


 5. **Complete the Application Form**
- **Form:** Apply online using the AN form on [gov.uk/apply-citizenship](https://www.gov.uk/apply-citizenship).
- **Fee:** £1,580 (as of 2025; check for updates).
- **Biometric Information:** You’ll be directed to a UKVCAS centre to provide fingerprints and a photo.


 6. **Submit Your Application and Documents**
- **Upload Documents:** Scan and upload all required documents as part of your online application.
- **Postal Submission:** If required, send original documents to the address provided after submission.


7. **Attend the Citizenship Ceremony**
- **Invitation:** If successful, you’ll receive an invitation to attend a citizenship ceremony.
- **Ceremony:** You must attend within 3 months. You’ll make an oath of allegiance and pledge of loyalty to the UK.
- **Fee:** £80 (paid when booking the ceremony).


 8. **Receive Your Certificate**
- **Certificate:** After the ceremony, you’ll receive your naturalisation certificate.
- **Passport:** You can now apply for your first British passport.


 **Important Notes**
- **Processing Time:** Usually 6 months, but can vary.
- **Children:** If you have children under 18, you may need to apply for them separately.
- **Dual Citizenship:** The UK allows dual citizenship, but check if your home country does.

but…

The devil is in the details

There is a quite unknown rule regarding the submission of the UK citizendship form. According to people that have done the process, the day of the submission, five years before the person had to be phisically in UK. Unclear from the official documentation but this rule is passed as a must be that rule.

Interesting this very little known rule is not reported above by any of LLM. But let’s check.

ChatGPT

is true that, when I submit the application for a uk citizenship, the same day exactly 5 years before I had to be physically in uk?

Short answer: Yes — in most cases, that is true.
But there are important nuances, so here is the exact rule explained clearly.

The “exactly 5 years before” rule (naturalisation)

If you are applying under the 5-year route (not married to a British citizen):

✅ Requirement

On the same calendar date, exactly 5 years before the date you submit your application, you must have been physically present in the UK.

Example
	•	Application submitted: 10 October 2025
	•	You must have been in the UK on: 10 October 2020

If you were outside the UK on that exact date, your application can be refused, even if:
	•	Your total absences are within limits
	•	You lived continuously in the UK otherwise

Why this rule exists

The Home Office counts your qualifying residence period backwards from the submission date, not from when you first arrived or when your visa started.
[...]

Claude - Haiku 4.5

So claude AI is behaving in a quite odd way. Asking the following question

is true that, when I submit the application for a uk citizenship, the same day exactly 5 years before I had to be physically in uk?

No, that's not quite how it works. Let me clarify the residency requirement:

Most people need to have lived in the UK for at least five years before they can apply for citizenship. However, this doesn't mean you need to be in the UK on the exact same date five years earlier.

The key points are:

The five-year requirement is flexible within reason. You don't need to have been physically present in the UK every single day of those five years. The Home Office allows certain absences from the UK, but these have limits depending on your circumstances—typically you shouldn't be absent for more than 450 days in total over the five-year period, or more than 90 days in any one year.

Time abroad counts if you maintain UK residency. If you've been working abroad or travelling but maintained your UK address and immigration status, some of this time may still count towards your residence requirement, depending on the specifics.

The five years is measured from when you got ILR. You must hold Indefinite Leave to Remain (ILR) for at least 12 months before applying. So the clock starts from when you received your ILR, not from when you first arrived in the UK.

So in summary: you need to have been in the UK continuously (with some allowed absences) for five years, but you don't need to submit your application on the exact anniversary date. You can apply anytime after you've completed the five-year residence requirement plus the 12-month ILR holding period.

But then, asking again, in the same session

is true that, when I submit the application for a uk citizenship, the same day exactly 5 years before I had to be physically in uk?

Yes, you're correct. That's an important detail.

When you submit your citizenship application, you must have been in the UK (meeting the residency requirements) for the full five-year period leading up to that submission date. In other words, if you submit your application on January 3, 2026, you need to have satisfied the residency requirements dating back to January 3, 2021.

The five-year clock is measured backwards from your application submission date, not from when you received your ILR or any other date. So yes, exactly five years before the day you submit, you needed to be in the UK (with only the allowed absences permitted).

This is why timing your application carefully is important—you can't apply until that full five-year period has elapsed from the date you first became eligible to count towards the requirement.

Mistral AI

Mistral AI is behaving in a odd way too

Asking the first time in the same session above the AI gives this answer

Great question! **No, you do not need to have been physically in the UK exactly 5 years before the day you submit your application.**

 How the 5-Year Residency Requirement Works:
- *Qualifying Period:* The 5 years (or 3 years if married to a British citizen) is counted backward from the date the Home Office receives your application.
- *Absence Rules:* You must not have spent more than **450 days** outside the UK during those 5 years, and no more than **90 days** in the last 12 months.
- *Key Date:* The most important thing is that you were physically present in the UK at the start of the 5-year period (i.e., you were legally living in the UK on that date), but you do not need to have been in the UK on the exact anniversary date.

 Example:
- If you submit your application on **January 3, 2026**, you must have been living in the UK on **January 3, 2021** (or earlier), but you do not need to have been in the UK on that exact date in 2021.

 What Matters Most:
- You must have been legally resident in the UK for the full 5 years.
- You must not have broken the absence rules.
- You must have held Indefinite Leave to Remain (ILR) for at least 12 months before applying.

putting the question in a new session generates this one instead

Yes, *it is true*

When you submit your application for *UK citizenship (naturalisation)*, the Home Office checks that you were physically present in the UK *exactly 5 years before the date your application is received*. This is a strict requirement.

### Key Points:
- *Example:* If your application is received on **January 3, 2026**, you must have been in the UK on **January 3, 2021**.
- *Why?* This ensures you were lawfully resident in the UK at the start of your 5-year qualifying period.
- *Other Requirements:*
  - You must not have spent more than *450 days outside the UK* in those 5 years.
  - You must not have spent more than *90 days outside the UK* in the last 12 months.
  - You must have held *Indefinite Leave to Remain (ILR) or EU settled status* for at least 12 months before applying.

*Tip:* Always double-check your travel history and dates to avoid issues with your application.

Would you like help calculating your exact qualifying dates or reviewing your absence days?

Conclusions

So good news and bad news. The good news are that this prompt is quite easy to use and provide a quite detailed list of actions. Bad news is that we found something fishy in the answer and, for the first time, we have a real proof that we cannot trust the info from an AI. Main points are:

  • All the AI forgot a key point
  • Two of the ones tested gave a wrong answer and, only when challenged, gave something decent.