Voice-to-Text for Writing Technical Specs and RFCs

Writing a technical spec or RFC is one of the most valuable things an engineer can do and one of the most consistently avoided. The problem isn't that engineers don't have things to say — it's that organizing and typing a multi-page technical document is a significant context switch from the implementation work that comes naturally.

Voice dictation compresses the drafting phase dramatically. Here's how to get a first draft of a technical spec from your head to the page in a fraction of the usual time.

Why Specs and RFCs Are Hard to Start

The mental model for a technical spec or RFC exists in the engineer's head in a form that's hard to transfer directly to text. You know the problem, the constraints, the proposed solution, the alternatives you considered, the risks. But translating that into a structured, readable document requires organizing your thoughts into a linear format that doesn't match how you hold the information internally.

Most engineers procrastinate on specs because of this translation cost. The document lives as "I need to write that spec" for longer than it should.

Speaking skips a significant part of this translation. You can speak non-linearly — jump around, backtrack, add context mid-thought — and the editing pass organizes it. The goal of the dictation phase isn't a perfect document. It's getting the ideas captured so you have something to organize.

The Two-Phase Approach

Phase 1: Brain dump by voice

Don't open a blank document and try to write in order. Instead, open a scratch doc and dictate everything you know about the problem and solution in whatever order it comes out.

Hold the hotkey and speak as if you're explaining the design to a colleague on a call:

"Okay so the problem is we're making a separate database query for every user preference fetch, and with 10,000 users active at peak it's generating like 50,000 queries per minute just for preferences. The solution I'm proposing is to cache user preferences in Redis with a 15-minute TTL. The main tradeoff is that preference changes will take up to 15 minutes to propagate, but that's acceptable for our use case. The implementation is pretty straightforward — we add a cache layer in the UserPreferenceService, check Redis first, fall back to the database on miss, and write back to cache on every database fetch..."

Keep going until you've covered everything you know. Don't organize. Don't edit. Just get it all out across multiple bursts.

Phase 2: Organize into structure

Once the brain dump is done, you have raw material to work with. The hard part — getting the ideas out — is done. Now you organize: cut and rearrange the pasted text into your standard spec structure. Fill gaps. Add the structured parts (diagrams, code snippets, decision matrices) with keyboard work.

This two-phase approach is dramatically faster than trying to write the final document in order on the first pass.

Standard RFC/Spec Sections and What to Dictate

Most technical specs and RFCs share a common structure. Here's what to dictate vs. what to type for each section:

Problem Statement: Dictate. Explain the problem conversationally — what's broken, what it's costing, why it matters now.

Proposed Solution: Dictate the explanation and rationale. Type any code examples, API signatures, or schema definitions.

Alternatives Considered: Dictate. This section gets skipped most often because it requires the most prose. Speak through each alternative and why you ruled it out.

Implementation Plan: Dictate the phases, sequence, and reasoning. Type specific task lists or estimates.

Risks and Mitigation: Dictate. "The main risk is X, which we're mitigating by Y. Secondary risk is Z, which we'll monitor by..."

Success Metrics: Type or dictate, depending on specificity required.

Open Questions: Dictate quickly — these are usually just sentence fragments about what's unresolved.

Getting Unstuck on the Hard Sections

The "Alternatives Considered" section is the one engineers most commonly skip or write poorly. It's also the section that most demonstrates engineering rigor to reviewers.

When you're stuck on it, dictate the reasons you ruled something out as if someone is challenging your design decision:

"Someone will ask why we didn't just increase the database read replica count. We considered that — it would address the immediate throughput issue but not the query volume problem, and it adds cost with no architectural benefit. We also considered moving to a read-through cache at the database level rather than application level, but that would require infrastructure changes that are out of scope for this quarter and don't give us the fine-grained control we need over TTL per preference type."

Speak the counterargument and your response. That's what "Alternatives Considered" is. You know this material — you just need to say it.

Collaborating on Specs

For shared specs where multiple engineers contribute, voice dictation helps with the async "review and comment" phase as well. Rather than leaving terse comments, reviewers can dictate their feedback directly into the document (or a comments thread) with full context.

"I think the TTL approach is right but 15 minutes might be too long for preference changes that affect billing — user plan changes should propagate immediately. Suggest we add a cache invalidation hook on UserPlanChange events so those always hit the database."

That feedback is specific and actionable. It took 20 seconds to speak. A reviewer who had to type it might write "TTL too long for billing?" — which generates back-and-forth instead of resolution.

The Output Quality

One important note: dictated technical specs tend to read more naturally than purely typed ones. They sound like they were written by a human explaining something to another human, which is exactly what a good spec should read like.

The pedantic, over-formal prose that plagues internal documentation — often a symptom of the typing-mode formality problem — largely disappears when you dictate. Reviewers find dictation-drafted specs easier to read and more likely to be approved quickly because the intent is clearer.

Draft the spec. Speak it. Clean it up. Ship it.