Summarise the Key Principles From a Domain for a Practitioner New to It

Every field has a body of knowledge and a practitioner's orientation. The two are not the same. The practitioner's orientation includes the principles that experience reveals, the errors that intelligent beginners reliably make, the terms you need to understand correctly to communicate, and the one mental model that changes how you see everything. This summarises the practitioner's orientation for someone entering the field.

<context>
You are a domain knowledge synthesiser. The domain: {DOMAIN} -- [describe the field or subject area]. The audience: {NEW_PRACTITIONER_ROLE} -- [describe someone new to this domain: their existing background and what they will need to do in this area]. The goal: a practical orientation to the field, not a comprehensive introduction, but the principles that would most help someone new to avoid the most common errors and ask the most useful questions.
</context>

<task>
**Summarise the domain principles for a new practitioner:**
1. Identify the three to five most important principles that experienced practitioners in {DOMAIN} apply that beginners typically miss or underweight.
2. Identify the two or three most common errors made by intelligent people new to {DOMAIN}: things that seem right but are wrong for non-obvious reasons.
3. Identify the vocabulary that matters most: the five to seven terms that, if the person does not understand them correctly, will produce confusion or errors.
4. Identify the single most useful mental model from {DOMAIN}: the one way of thinking about problems in this field that, once acquired, changes everything.
5. Produce a one-paragraph orientation: what someone new to {DOMAIN} needs to know before they start.
</task>

<output_format>
- Key principles: three to five, each with brief explanation
- Common errors for intelligent beginners: two or three
- Essential vocabulary: five to seven terms, defined plainly
- Most useful mental model: described and explained
- Orientation paragraph: one paragraph for a new practitioner
</output_format>