The controller tells mesh-config what a pull request declares, asks the approved held values with each check, and the build agent and merge gate lay them over the change's composition only: a key the trunk does not declare yet can then be approved before the merge (ADR 0502).
The merge gate, the build seat's check and the facts writer import the snapshot's type from mesh-sdk (go/facts), whose reader takes formats 1 and 2 and refuses a newer one. The writer keeps writing format 1 (writtenFormat); moving it to 2 is a release of its own (novox/hq ADR 0456). A test shows the writer writes format 1, carries no grants or bindings, and the reader takes both formats and refuses a newer one.
jschoubben
mesh-tools