Who still understands your code?
I built an instrument for a number no dashboard tracks. AI writes more of every codebase each quarter, authors move on, and reviews keep getting thinner. Nothing measures how much of the result a person who is still here actually understands.
Grasp computes the Grasp Score from git metadata alone, without reading a line of source, and publishes the full methodology so any number it produces can be checked.
Scan a public repo at graspscore.comThe State of Comprehension Debt
Twenty-two major open source repositories, measured in July 2026.
living authorship in expressjs/express. Three fifths of a foundational web framework was written by authors who are no longer active.
contributor survival in langchain-ai/langchain, with 42 active contributors out of 4,548 all-time.
for curl/curl at 25 years old, healthier than all but one repository in the benchmark.