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$129

The Builder's Stack

Prompt → Agent → Eval. All three products, fully integrated. Save $38 vs. buying separately.

Prompt → Agent → Eval. The three primitives every AI builder ships.

The Builder's Stack is all three of our products — Prompt Foundry, Agent Blueprints, and Eval Kit — packaged together with an onboarding walkthrough that wires them end-to-end.

Individual sum: $167. Bundle: $129 (save $38). One-time purchase. Commercial license. Lifetime updates on every product (v1.1 of each is free).

The story behind it

Why these three, together

The stack is designed for integration:

  • Prompt Foundry ships 32 XML-tagged prompts, each with a .jsonl of golden eval cases.
  • Agent Blueprints ships 6 production agents whose system prompts follow the Foundry conventions and whose eval sets follow the same .jsonl shape.
  • Eval Kit auto-discovers both. Drop the evals/ directories in; everything runs through one CI workflow.

You can wire the entire prompt → agent → eval pipeline in one Friday afternoon. The Stack Onboarding walkthrough script (delivered now, video to follow) shows you exactly how.

What's inside

  • All 3 products — Prompt Foundry + Agent Blueprints + Eval Kit
  • Save $38 vs. buying individually
  • Built to integrate — evals auto-discover prompts & agents
  • Bonus: Stack Onboarding walkthrough script (video to follow)
  • Commercial license, lifetime updates on every product
Compatible with
ClaudeOpus 4.7 / SonnetGPT-5OpenAIGemini 2.5GoogleVercel AI SDKTSClaude Agent SDKTS / PyOpenAI AssistantsAPIGitHub ActionsCINotionTemplate
· prompt-foundry-v1.0.0.zip  80KB· agent-blueprints-v1.0.0.zip  68KB· eval-kit-v1.0.0.zip  32KB· STACK-ONBOARDING-WALKTHROUGH.md  (script — video to follow)

Common questions