{"slug": "stop-prompt-engineering-start-context-engineering", "title": "Stop Prompt Engineering, Start Context Engineering", "summary": "A developer explains that the key to effective AI agents is context engineering rather than prompt engineering, detailing the observe-think-act loop and the importance of setting up context, memory, and tools once to enable simple prompts and consistent results.", "body_md": "AI agents get talked about a lot, but most explanations stay abstract. Here's a short, practical breakdown of what actually makes an agent work — plus a simple example.\n\n```\nChat:   You ask ──> Model answers ──> You act\nAgent:  You set goal ──> Agent plans → acts → checks ──> Result delivered\n```\n\nEvery agent — no matter the platform — runs the same loop:\n\n```\n   ┌─────────┐\n   │ OBSERVE │  read context, current state\n   └────┬────┘\n        ▼\n   ┌─────────┐\n   │  THINK  │  decide next action\n   └────┬────┘\n        ▼\n   ┌─────────┐\n   │   ACT   │  execute, then loop again\n   └────┬────┘\n        │\n        └──────► repeats until task is done\n```\n\nAn agent = **LLM (brain) + Loop + Tools + Context**. The \"harness\" (Claude Code, Cowork, Codex, etc.) is just the app that runs this loop.\n\n```\n┌────────────────────────────┐\n│ 5. Skills   → reusable SOPs │\n├────────────────────────────┤\n│ 4. Tools    → via MCP       │\n├────────────────────────────┤\n│ 3. Memory   → memory.md     │\n├────────────────────────────┤\n│ 2. Context  → agents.md     │\n├────────────────────────────┤\n│ 1. Loop     → observe→think→act │\n└────────────────────────────┘\n```\n\n`agents.md`\n\n/ `Claude.md`\n\n)`memory.md`\n\n)**Prompt engineering → Context engineering.** Rich context turns a 2-word prompt into a great result.\n\nA solo creator automating their weekly newsletter:\n\n`agents.md`\n\n— newsletter's audience, tone, format, connected tools (Notion, Docs, social)`memory.md`\n\n— learns preferences over time (\"shorter subject lines,\" etc.)`weekly-newsletter`\n\nskill → schedule it for every ThursdaySame shape every time: **context + memory + tools set up once → simple prompts → consistent results.**\n\n`agents.md`\n\n(role, business, tools, preferences)`memory.md`\n\nThis isn't about cleverer prompts — it's front-loading context once so every future ask can stay simple.", "url": "https://wpnews.pro/news/stop-prompt-engineering-start-context-engineering", "canonical_source": "https://dev.to/naimulkarim/stop-prompt-engineering-start-context-engineering-2gf5", "published_at": "2026-08-03 04:32:35+00:00", "updated_at": "2026-08-03 05:09:45.622594+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-agents", "ai-tools", "large-language-models"], "entities": ["Claude Code", "Cowork", "Codex", "MCP", "Notion"], "alternates": {"html": "https://wpnews.pro/news/stop-prompt-engineering-start-context-engineering", "markdown": "https://wpnews.pro/news/stop-prompt-engineering-start-context-engineering.md", "text": "https://wpnews.pro/news/stop-prompt-engineering-start-context-engineering.txt", "jsonld": "https://wpnews.pro/news/stop-prompt-engineering-start-context-engineering.jsonld"}}