cd /news/ai-tools/from-a-single-file-to-an-mcp-server-… · home › topics › ai-tools › article
[ARTICLE · art-25738] src=pub.towardsai.net ↗ pub= topic=ai-tools verified=true sentiment=· neutral

From a Single File to an MCP Server: Six Rewrites of My Own Harness

A developer documented six iterations of their AI harness, evolving from a single file to an MCP server, highlighting architectural improvements and lessons learned in building AI tools.

read1 min views19 publishedJun 12, 2026

Article URL: https://pub.towardsai.net/from-a-single-file-to-an-mcp-server-six-rewrites-of-my-own-harness-74b4d67b5373?source=friends_link&sk=9e8b13e4920771b5d414db224901bf0e

Comments URL: [https://news.ycombinator.com/item?id=48510567](https://news.ycombinator.com/item?id=48510567)

Points: 2
source & further reading
pub.towardsai.net — original article The Sub-$3 Power Meter: Measuring Edge AI Energy Consumption Without an SMU How Will The Future Software Engineer Distinquish Itself When Writing Code Becomes Fully… Agent Skills: The Composition Cliff
── more in #ai-tools 4 stories · sorted by recency
sponsored brought to you by zahid.host 4,200+ EU-deployed projects
reading about agents? ship yours in a single git push.

Run your AI side-project on zahid.host

EU-based hosting, git-push deploys, automatic HTTPS, no cold starts. Free tier with a custom domain — perfect for shipping the agent you just read about.

$git push zahid main
→ Live at https://your-agent.zahid.host ✓
Get free account → Pricing
from €0/mo · no card required
LIVE [news/from-a-single-file-t…] indexed:0 read:1min 2026-06-12 · —