Hosho

Hosho Research

What actually makes a prompt work - and what the evidence says.

The messy problem of promptingWhy small wording changes swing outcomes - and why your coding agent can't fix itJuly 2026So what matters in a prompt?Four factors, twelve sub-factors, and the research behind eachJuly 2026Catch fragile prompts before you ship or switch modelsHosho reads prompt text for a score, line-anchored findings, and fixes - MCP, Prompt Editor, or Git Bot beside your evalsSeptember 2026Versioning answers what shipped. Review answers why it is fragile.Why a versioned, eval-tested prompt can still ship fragile text - and the lighter read that catches itSeptember 2026