Configuring AI coding agents on real projects: the harness, not just the prompt. A course for .NET developers who use Claude Code, Codex or Antigravity as a chat, and need a repo whose rules, skills, reviewers and guards steer any agent.
Read it: https://osmosyssoftware.github.io/agent-harness-course/ (or open index.html locally). Start with "Before you start".
| Folder | What |
|---|---|
lessons/ |
11 lessons, each ending in one exercise |
reference/ |
Printable reference sheets and glossary |
reference-solution/ |
StockApi after all 11 lessons, with the full harness |
capstone-starter/ |
RoomBooking, the fresh repo for the capstone |
assets/ |
Shared stylesheet, quiz widget, page linter (python3 assets/check_pages.py) |
The practice repo lives separately: https://github.com/OsmosysSoftware/agent-harness-practice
Tool behaviour was verified against official docs on 2026-09-30. Anything marked "version-specific" should be re-checked when your tool is newer.