CAIN-42 CAIN StudioCAAE · Module 2 of 5 · 13 min
Grading trajectories, not just answers
An agent can reach the right answer through a dangerous or wasteful path: duplicate calls, unnecessary spend, a risky step later corrected. Answer-only grading misses all of it.
TrajectoryGate grades the path: duplicate calls, spend the answer didn't need (found by searching back through the dependency graph), and risky-then-corrected steps.
Use trajectory grades as release gates: a correct answer with a dangerous path fails.
Key points
- Right answer ≠ safe path.
- Grade duplicates, unneeded spend, risky-then-corrected.
- Gate releases on the trajectory.
In the CAIN-42 codebase
trajectorygate/— trajectory grading engine
Practice check
Practice 1 · choose one
An agent deletes a file then restores it, ending correct. Trajectory grading flags…
Practice 2 · true or false