diff --git a/auth/auth.go b/auth/auth.go
index 35db896..8e2a432 100644
--- a/auth/auth.go
+++ b/auth/auth.go
@@ -323,7 +323,9 @@ func (a *Authenticator) ValidateSession(token string) (*Session, error) {
 	}
 
 	if time.Now().After(session.ExpiresAt) {
-		_ = a.store.Delete(token)
+		if err := a.store.Delete(token); err != nil {
+			return nil, coreerr.E(op, "session expired", err)
+		}
 		return nil, coreerr.E(op, "session expired", nil)
 	}
 
@@ -340,7 +342,9 @@ func (a *Authenticator) RefreshSession(token string) (*Session, error) {
 	}
 
 	if time.Now().After(session.ExpiresAt) {
-		_ = a.store.Delete(token)
+		if err := a.store.Delete(token); err != nil {
+			return nil, coreerr.E(op, "session expired", err)
+		}
 		return nil, coreerr.E(op, "session expired", nil)
 	}
 
@@ -389,7 +393,9 @@ func (a *Authenticator) DeleteUser(userID string) error {
 	}
 
 	// Revoke any active sessions for this user
-	_ = a.store.DeleteByUser(userID)
+	if err := a.store.DeleteByUser(userID); err != nil {
+		return coreerr.E(op, "failed to delete user sessions", err)
+	}
 
 	return nil
 }
@@ -565,7 +571,9 @@ func (a *Authenticator) RevokeKey(userID, password, reason string) error {
 	}
 
 	// Invalidate all sessions
-	_ = a.store.DeleteByUser(userID)
+	if err := a.store.DeleteByUser(userID); err != nil {
+		return coreerr.E(op, "failed to delete user sessions", err)
+	}
 
 	return nil
 }
diff --git a/cmd/testcmd/cmd_runner.go b/cmd/testcmd/cmd_runner.go
index d952b1b..6aa312e 100644
--- a/cmd/testcmd/cmd_runner.go
+++ b/cmd/testcmd/cmd_runner.go
@@ -49,7 +49,11 @@ func runTest(verbose, coverage, short bool, pkg, run string, race, jsonOutput bo
 
 	// Create command
 	cmd := exec.Command("go", args...)
-	cmd.Dir, _ = os.Getwd()
+	cwd, err := os.Getwd()
+	if err != nil {
+		return coreerr.E("cmd.test", "failed to determine working directory", err)
+	}
+	cmd.Dir = cwd
 
 	// Set environment to suppress macOS linker warnings
 	cmd.Env = append(os.Environ(), getMacOSDeploymentTarget())
@@ -76,7 +80,7 @@ func runTest(verbose, coverage, short bool, pkg, run string, race, jsonOutput bo
 		cmd.Stderr = &stderr
 	}
 
-	err := cmd.Run()
+	err = cmd.Run()
 	exitCode := 0
 	if err != nil {
 		if exitErr, ok := err.(*exec.ExitError); ok {
diff --git a/crypt/chachapoly/chachapoly_test.go b/crypt/chachapoly/chachapoly_test.go
index 1123f2c..2bc9cf5 100644
--- a/crypt/chachapoly/chachapoly_test.go
+++ b/crypt/chachapoly/chachapoly_test.go
@@ -2,9 +2,10 @@ package chachapoly
 
 import (
 	"crypto/rand"
-	"errors"
 	"testing"
 
+	coreerr "dappco.re/go/core/log"
+
 	"github.com/stretchr/testify/assert"
 )
 
@@ -12,7 +13,7 @@ import (
 type mockReader struct{}
 
 func (r *mockReader) Read(p []byte) (n int, err error) {
-	return 0, errors.New("read error")
+	return 0, coreerr.E("chachapoly.mockReader.Read", "read error", nil)
 }
 
 func TestEncryptDecrypt(t *testing.T) {
diff --git a/crypt/openpgp/service.go b/crypt/openpgp/service.go
index cc63e26..50fc7d3 100644
--- a/crypt/openpgp/service.go
+++ b/crypt/openpgp/service.go
@@ -149,7 +149,9 @@ func (s *Service) DecryptPGP(privateKey, message, passphrase string, opts ...any
 			return "", coreerr.E("openpgp.DecryptPGP", "failed to decrypt private key", err)
 		}
 		for _, subkey := range entity.Subkeys {
-			_ = subkey.PrivateKey.Decrypt([]byte(passphrase))
+			if err := subkey.PrivateKey.Decrypt([]byte(passphrase)); err != nil {
+				return "", coreerr.E("openpgp.DecryptPGP", "failed to decrypt subkey", err)
+			}
 		}
 	}
 
diff --git a/crypt/pgp/pgp.go b/crypt/pgp/pgp.go
index 56bfef8..a0ce9d6 100644
--- a/crypt/pgp/pgp.go
+++ b/crypt/pgp/pgp.go
@@ -34,7 +34,9 @@ func CreateKeyPair(name, email, password string) (*KeyPair, error) {
 
 	// Sign all the identities
 	for _, id := range entity.Identities {
-		_ = id.SelfSignature.SignUserId(id.UserId.Id, entity.PrimaryKey, entity.PrivateKey, nil)
+		if err := id.SelfSignature.SignUserId(id.UserId.Id, entity.PrimaryKey, entity.PrivateKey, nil); err != nil {
+			return nil, coreerr.E(op, "failed to sign identity", err)
+		}
 	}
 
 	// Encrypt private key with password if provided
@@ -166,7 +168,9 @@ func Decrypt(data []byte, privateKeyArmor, password string) ([]byte, error) {
 		}
 		for _, subkey := range entity.Subkeys {
 			if subkey.PrivateKey != nil && subkey.PrivateKey.Encrypted {
-				_ = subkey.PrivateKey.Decrypt([]byte(password))
+				if err := subkey.PrivateKey.Decrypt([]byte(password)); err != nil {
+					return nil, coreerr.E(op, "failed to decrypt subkey", err)
+				}
 			}
 		}
 	}
diff --git a/crypt/rsa/rsa_test.go b/crypt/rsa/rsa_test.go
index 7211995..58ca877 100644
--- a/crypt/rsa/rsa_test.go
+++ b/crypt/rsa/rsa_test.go
@@ -6,9 +6,10 @@ import (
 	"crypto/rand"
 	"crypto/x509"
 	"encoding/pem"
-	"errors"
 	"testing"
 
+	coreerr "dappco.re/go/core/log"
+
 	"github.com/stretchr/testify/assert"
 )
 
@@ -16,7 +17,7 @@ import (
 type mockReader struct{}
 
 func (r *mockReader) Read(p []byte) (n int, err error) {
-	return 0, errors.New("read error")
+	return 0, coreerr.E("rsa.mockReader.Read", "read error", nil)
 }
 
 func TestRSA_Good(t *testing.T) {
diff --git a/trust/approval.go b/trust/approval.go
index fbf6bbd..627ca0b 100644
--- a/trust/approval.go
+++ b/trust/approval.go
@@ -151,8 +151,8 @@ func (q *ApprovalQueue) Get(id string) *ApprovalRequest {
 		return nil
 	}
 	// Return a copy to prevent mutation.
-	copy := *req
-	return &copy
+	snapshot := *req
+	return &snapshot
 }
 
 // Pending returns all requests with ApprovalPending status.