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Everything you need to build with Ejentum. From quickstart guides to advanced patterns.

Builder's Playbook

Tips, real-world examples, and agentic workflows with Ejentum's harness API in action.

Field Notes: 28 Moments from Inside the IDE

I use the harness API every day to build Ejentum itself. These field notes are 28 screenshots from real work sessions: backend infrastructure, benchmark design, security auditing, blog writing, dataset purification, and research. Different tasks. Different days. Same tool.

Each screenshot shows a moment where I retrieved an ability, injected it, and watched it change how my agent reasoned.

Highlights

  • The First Call. How a session starts. Retrieving an ability before writing any code.
  • The 62% Finding. The API returned the wrong reasoning domain. Performance improved anyway.
  • The Bias Self-Check. The agent questioning whether it's making the product look good instead of being honest.
  • The Security Ritual. 17 rounds of adversarial auditing. Set theory, state machines, cryptography, game theory. 101 fixes. 107 tests.

Read the full guide with images on GitHub

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More playbook entries coming. Tips on dynamic vs adaptive selection, integration patterns, and workflow recipes.

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