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KnowledgeLayer 2Prompt Architecture

Prompt Templating

Your team writes the same AI prompts over and over. "Summarize this document for the customer." "Draft a response to this inquiry." "Generate a report on this data." Every time, someone reinvents the wheel.

Worse, every person writes it slightly differently. One version works well. Another produces garbage. Nobody knows which prompts are tested and which are experiments.

Now multiply this by 50 team members running 200 prompts a week. Inconsistent outputs. Wasted time. No way to improve systematically because nothing is captured.

Prompt templating turns ad-hoc copy-paste into a structured library of reusable prompts with variables that get filled in at runtime.

10 min read
intermediate
Relevant If You're
Standardizing AI outputs across your team
Building repeatable AI-powered workflows
Maintaining quality as you scale AI usage

INTELLIGENCE INFRASTRUCTURE - The reusable building blocks that make AI behavior consistent and maintainable across your organization.

Where This Sits

Category 2.2: Prompt Architecture

2
Layer 2

Intelligence Infrastructure

Chain-of-Thought PatternsFew-Shot Example ManagementInstruction HierarchiesPrompt TemplatingPrompt Versioning & ManagementSystem Prompt Architecture
Explore all of Layer 2
What It Is

From copy-paste chaos to a prompt library

A prompt template is a reusable AI instruction with placeholders for variables. Instead of writing 'Summarize this customer feedback email from Sarah Chen about her order #1234' every time, you create a template: 'Summarize this {{content_type}} from {{person_name}} about {{topic}}'. The template stays constant. The variables change per use.

The power isn't just in saving keystrokes. It's in capturing what works. When you find a prompt structure that produces great results, you template it. Now everyone uses the proven version. You can improve it once, and improvements propagate everywhere it's used.

Without templating, every AI interaction is a fresh experiment. With templating, you build on what works. You stop reinventing prompts and start refining them.

The Lego Block Principle

Prompt templating solves a universal problem: how do you create reusable instructions that can adapt to different contexts without rewriting them each time?

The core pattern:

Separate the stable instruction from the variable context. Define placeholders for what changes. Inject the right values at runtime. The template becomes a reusable asset you can test, version, and improve.

Where else this applies:

Email templates - Same structure, different recipient names, topics, and specifics.
Report generation - Same format and sections, different data and date ranges.
Onboarding checklists - Same steps and requirements, different new hire names and roles.
SOP documentation - Same process structure, different department-specific details.
Interactive: Template Builder

See how one template produces many prompts

Choose a template, fill in the variables, and watch the final prompt assemble.

Fill Variables

Template Structure

Summarize the following {{document_type}} for {{audience}}.

Focus on: {{focus_areas}}

Tone: {{tone}}

Document content:
{{document_content}}

Assembled Prompt

Summarize the following quarterly report for the leadership team.

Focus on: key metrics and action items

Tone: professional but concise

Document content:
[Paste document text here]
Key insight: The template never changed, but you can produce completely different prompts by swapping variables. This is the power of templating: one tested structure, infinite variations.
How It Works

Three approaches to prompt templating

Simple Variable Substitution

The {{variable}} pattern

Define placeholders like {{customer_name}} or {{document_type}} in your prompt text. Before sending to the AI, replace each placeholder with the actual value. 'Summarize this {{document_type}} for {{audience}}' becomes 'Summarize this quarterly report for the leadership team.'

Pro: Simple to implement and understand
Con: No logic, just direct replacement. Can't handle conditionals.

Conditional Templates

If-then sections

Templates can include or exclude sections based on conditions. If the customer tier is 'premium', include detailed analysis. If the request type is 'urgent', add priority handling instructions. The template adapts its structure based on context.

Pro: One template handles multiple scenarios
Con: More complex to maintain. Harder to test all paths.

Composable Template Blocks

Lego-style assembly

Break templates into smaller, reusable blocks. A header block sets the role. An instruction block defines the task. A format block specifies output structure. Assemble different combinations for different use cases. Same blocks, different compositions.

Pro: Maximum reuse. Change one block, update many templates.
Con: Requires more upfront design. Block dependencies can get complex.
Connection Explorer

"Consistent customer responses from templated prompts"

Your team responds to 200+ customer inquiries daily. Each response needs to be personalized but consistent. Templates define the structure, variables inject the customer's name, issue, history, and context. Every response follows proven patterns while feeling personal.

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Relational DB
AI Text Generation
Prompt Templating
You Are Here
System Prompt Architecture
Prompt Versioning
Workflow Orchestration
Consistent Responses
Outcome
React Flow
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Foundation
Intelligence
Delivery
Outcome

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Upstream (Requires)

Relational DBAI Generation (Text)

Downstream (Enables)

System Prompt ArchitecturePrompt Versioning & ManagementFew-Shot Example Management
Common Mistakes

What breaks when prompt templating goes wrong

Don't hardcode values that change

You wrote 'Always refer to the customer as valued' directly in your template. Later, you need a formal version for legal documents and a casual version for support chats. Now you have two nearly identical templates to maintain. Changes to one don't propagate to the other.

Instead: Make tone, formality, and style into variables. One template, multiple styles via different variable sets.

Don't skip validation of variable values

Your template expects {{order_number}} but someone passes an empty string. The AI receives 'Look up order number: ' and hallucinates a response. Or worse, it receives 'Look up order number: DROP TABLE orders' from a malicious input.

Instead: Validate all variables before substitution. Type check, sanitize, and provide defaults for missing values. Never trust raw input.

Don't let templates become unmaintainable

You have 50 templates scattered across team members' documents, Notion pages, and code comments. Nobody knows which version is current. Someone 'improved' a template that was actually working fine. There's no history, no testing, no ownership.

Instead: Centralize templates in one system. Version them. Test them before promoting to production. Assign owners. Treat them like code.

What's Next

Now that you understand prompt templating

You've learned how to create reusable prompt structures with variables. The natural next step is organizing these templates into a layered system prompt architecture.

Recommended Next

System Prompt Architecture

Layered, modular design of system instructions

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