chore: rename IAM to instance (#11351)

# Which Problems Are Solved

In many cases IAM was used where instance was meant. 

# How the Problems Are Solved

- Rename wrong usage of IAM to instance all over the code base.
- Add an agents.md which explains the terms used in Zitadel's
architecture.

# Additional Context

- closes #11280

---------

Co-authored-by: Copilot <[email protected]>
Co-authored-by: muhlemmer <[email protected]>
Co-authored-by: Copilot <[email protected]>
Co-authored-by: Marco A. <[email protected]>
This commit is contained in:
Tim Möhlmann
2026-02-10 20:25:39 +01:00
committed by GitHub
co-authored by Copilot muhlemmer Copilot Marco A.
parent 67a02a6aeb
commit 5a2181bcec
110 changed files with 392 additions and 478 deletions
@@ -89,7 +89,7 @@ func setInstance(ctx context.Context, verifier authz.InstanceVerifier) (_ contex
requestContext := zitadel_http.DomainContext(ctx)
if requestContext.InstanceDomain() == "" {
return nil, zerrors.ThrowNotFound(err, "INST-zWq7X", "Errors.IAM.NotFound")
return nil, zerrors.ThrowNotFound(err, "INST-zWq7X", "Errors.Instance.NotFound")
}
instance, err := verifier.InstanceByHost(authCtx, requestContext.InstanceDomain(), requestContext.RequestedDomain())
if err != nil {