Borrowing things among neighbors
dev-loan-library
- Direct agent
- 0.621
- Lamina agent
- 0.750
- Plan-first agent
- 0.566
Initial public release · July 25, 2026
Product Bench
A matched three-arm comparison on four greenfield thin vertical slices, scored with Harbor RewardKit.
- Lamina mean
- 0.689
- vs direct
- +0.104
- vs plan-first
- +0.130
- Tasks led
- 4/4
Results
Product behavior scores and task-level medians from three full reruns per task and arm.
Mean scores
- Direct agent
- 0.586
- Lamina agent
- 0.689
- Plan-first agent
- 0.559
By task
Lamina led
Lightweight document review
dev-review-room
- Direct agent
- 0.566
- Lamina agent
- 0.670
- Plan-first agent
- 0.515
A tiny household list
dev-simple-list
- Direct agent
- 0.614
- Lamina agent
- 0.721
- Plan-first agent
- 0.614
One-sided preference toggle
dev-toggle-preference
- Direct agent
- 0.541
- Lamina agent
- 0.617
- Plan-first agent
- 0.541
Methodology
Three workflows, the same four tasks, and the same 25-minute agent budget per arm.
Direct agentshape_build → verify_fix · 1,500 seconds (25 minutes)
Normal coding agent without Lamina skills. Implements from the founder brief with no plan-first workflow.
Lamina agentlamina_init → lamina_design → implement → fix · 1,500 seconds (25 minutes)
Full Lamina loop: init, design with persona panel, implement, and fix. No separate verify step.
Plan-first agentshape_build → verify_fix · 1,500 seconds (25 minutes)
Normal coding agent using a plan-first workflow. Writes a short plan, then implements. No Lamina skills.
- Harness
- cursor-cli
- Model
- composer-2.5
- Reruns
- 3 per task and arm
- Scoring
- RewardKit · openai/gpt-5.5
RewardKit scored /app/app.mjs and /app/ui.mjs. Lamina process notes were not scored.
Scope
Current release
Four thin vertical slices, greenfield projects only, using Cursor CLI with Composer 2.5. Results apply to this corpus and setup—not every software project.
Next
Larger applications, brownfield projects, and more model and harness combinations.
Evidence
Inspect the packaged README, task definitions, and public jobs on Harbor.