Intermediary

Podcast 2 — In conversation

Speaker A: I got a call from an estate agent yesterday. They described themselves as an intermediary between the buyer and the seller. It made the role sound quite official.

Speaker B: That is exactly what they are. An intermediary facilitates a transaction where the two main parties do not deal with each other directly.

Speaker A: Is intermediary interchangeable with mediator or broker?

Speaker B: They overlap but differ in emphasis. A mediator actively works to resolve a dispute — they guide the parties toward agreement. A broker arranges a deal in a specific commercial sense. An intermediary is the broader term — it simply means the in-between party.

Speaker A: So an estate agent, a lawyer carrying messages, or even an API could all be called intermediaries?

Speaker B: Yes. The word is flexible enough to cover all of those. What they share is the structural position — standing between two parties who need something passed between them.

Speaker A: I have also seen it used in technology contexts — an intermediary layer in software architecture.

Speaker B: Exactly. In software, an intermediary layer handles communication between two systems that would otherwise need to know too much about each other. It is a form of decoupling.

Speaker A: That is a clean concept. What would be the wrong way to use intermediary?

Speaker B: Using it to mean simply a middleman in a casual or dismissive sense loses its precision. Intermediary implies a structured, intentional role — not just someone passing a message along informally.

Speaker A: What about intermediary as an adjective? I hear it less often used that way.

Speaker B: True. Intermediary stage or intermediary body are correct but relatively formal. You are more likely to hear intermediate in everyday speech — intermediate level, intermediate step.

Speaker A: So intermediary the adjective is more formal than intermediate?

Speaker B: Yes. Both share the same root, but intermediary as an adjective carries a slightly more official or technical register. In most everyday contexts, intermediate is the natural choice.

Speaker A: That is a useful distinction. I shall keep intermediary for the formal and technical contexts.

Speaker B: Precisely. Let the word do the work it is built for — structural, professional, and precise.

Podcast 3 — Prompt engineering

Speaker B: Today we are focusing on intermediary as a precision term in software architecture prompts. It is one of the most useful words for describing layers, proxies, and service boundaries.

Speaker A: I can already see the application in API design.

Speaker B: Exactly where we start. When you name an intermediary layer in a prompt, the AI understands: this component does not own the data — it receives, transforms, and forwards it. That shapes the entire architecture.

Speaker A: First prompt?

Speaker B: Build an intermediary API layer between the mobile app and the database. The layer must handle authentication, rate limiting, and response formatting. The mobile app should never query the database directly.

Speaker B: Naming it as an intermediary layer sets the boundary clearly. The AI builds a service that owns the communication rules — not just a pass-through.

Speaker A: Payment systems?

Speaker B: Design an intermediary service between the e-commerce checkout and the payment gateway. The service must validate order totals, apply discount codes, log every transaction attempt, and only then pass the request to the payment provider.

Speaker B: The intermediary service is the audit and validation layer. The AI places business logic there — not in the checkout page and not in the payment gateway.

Speaker A: What about UI navigation between two very different sections of an app?

Speaker B: Build an intermediary screen between the public product catalogue and the authenticated checkout flow. Show a login prompt for guests, a cart summary for logged-in users, and a continue button. Handle session state here.

Speaker B: The intermediary screen owns the transition logic. The AI does not split this responsibility between the catalogue and the checkout — it concentrates it in one place.

Speaker A: HR workflow?

Speaker B: Build an intermediary approval module in the HR system. Leave requests from employees must pass through this module before reaching the manager. The module checks leave balance, flags conflicts, and formats the request before forwarding.

Speaker B: The intermediary module is the rule-enforcer. It ensures requests are valid and complete before a manager ever sees them.

Speaker A: Data pipeline?

Speaker B: Design an intermediary data processor between the IoT sensor feed and the analytics database. The processor must filter noise, normalise units, batch records every thirty seconds, and write only clean data to the database.

Speaker B: Without the intermediary processor, raw sensor noise would reach the database. The AI builds the cleaning layer as a first-class component.

Speaker A: Notification system?

Speaker B: Build an intermediary notification service between all application modules and the end user. Every module sends events to this service, which decides the channel — email, push, or SMS — based on user preferences and urgency level.

Speaker B: The intermediary service decouples notification logic from every other module. The AI builds it as a single, controlled gateway — not scattered across the codebase.

Speaker A: I can see how intermediary shapes the architecture before the AI writes a single line of code.

Speaker B: That is the power of the right word. Intermediary declares: this component exists to bridge two things — give it its own responsibilities, its own boundaries, and its own logic.