Descriptions:
Brian Casel interviews Ruby on Rails developer Colleen Schnettler, founder of Simple File Upload, who built a custom voice-to-LinkedIn post automation tool using Claude Code in just two days. Frustrated with every AI-powered LinkedIn writing tool on the market for producing generic, robotic output, Schnettler decided to build her own system tuned to her actual voice and workflow.
The pipeline works as follows: Schnettler dictates ideas throughout the day using Super Whisper, a voice transcription app. A custom app watches the transcription folder, reads new entries, and passes them to Claude Code to generate draft LinkedIn posts. The system also includes a conversational chat interface for refining individual posts — a feature she planned and built using the compound engineering workflow plugin from Every, which generates a structured implementation plan before any code is written. Schnettler describes reviewing what Claude got wrong in the first pass of the plan, correcting the data model, and then executing against the revised spec.
The conversation covers her spec-driven development approach in practical detail: writing a detailed plan for significant features, reading AI-generated code rather than blindly trusting it, and distinguishing between changes that need deep review versus quick prompt-level fixes. Schnettler is now launching a technical marketing consulting practice that leverages this builder mindset. Her example illustrates how developers can apply their existing skills to create bespoke AI-powered tools that outperform off-the-shelf alternatives — built in a weekend rather than purchased on a subscription.
📺 Source: Brian Casel · Published February 03, 2026
🏷️ Format: Hands On Build
