diff --git a/internal/cmd/auth_credentials.go b/internal/cmd/auth_credentials.go
index 61d52356..97bc3ecd 100644
--- a/internal/cmd/auth_credentials.go
+++ b/internal/cmd/auth_credentials.go
@@ -15,8 +15,9 @@ import (
 )
 
 type AuthCredentialsCmd struct {
-	Set  AuthCredentialsSetCmd  `cmd:"" default:"withargs" help:"Store OAuth client credentials"`
-	List AuthCredentialsListCmd `cmd:"" name:"list" help:"List stored OAuth client credentials"`
+	Set    AuthCredentialsSetCmd    `cmd:"" default:"withargs" help:"Store OAuth client credentials"`
+	List   AuthCredentialsListCmd   `cmd:"" name:"list" help:"List stored OAuth client credentials"`
+	Remove AuthCredentialsRemoveCmd `cmd:"" name:"remove" help:"Remove stored OAuth client credentials"`
 }
 
 type AuthCredentialsSetCmd struct {
@@ -160,3 +161,149 @@ func (c *AuthCredentialsListCmd) Run(ctx context.Context, _ *RootFlags) error {
 	}
 	return nil
 }
+
+type AuthCredentialsRemoveCmd struct {
+	Client string `arg:"" optional:"" name:"client" help:"Client name to remove (omit for default, or 'all' to remove every client)"`
+}
+
+func (c *AuthCredentialsRemoveCmd) Run(ctx context.Context, flags *RootFlags) error {
+	u := ui.FromContext(ctx)
+
+	// Determine target client(s): explicit arg > --client flag > default.
+	target := strings.TrimSpace(c.Client)
+	if target == "" {
+		t, err := normalizeClientForFlag(authclient.ClientOverrideFromContext(ctx))
+		if err != nil {
+			return err
+		}
+		target = t
+	}
+
+	if strings.EqualFold(target, "all") {
+		return c.removeAll(ctx, flags, u)
+	}
+
+	client, err := config.NormalizeClientNameOrDefault(target)
+	if err != nil {
+		return err
+	}
+
+	accounts := findAccountsForClient(client)
+
+	action := fmt.Sprintf("remove OAuth credentials for client %q", client)
+	if len(accounts) > 0 {
+		action += fmt.Sprintf(" and %d associated token(s) (%s)", len(accounts), strings.Join(accounts, ", "))
+	}
+	if err := confirmDestructive(ctx, flags, action); err != nil {
+		return err
+	}
+
+	if err := config.DeleteClientCredentialsFor(client); err != nil {
+		return err
+	}
+
+	tokensRemoved := removeTokensForClient(client, accounts)
+	domainsRemoved := removeDomainMappings(client)
+
+	return writeResult(ctx, u,
+		kv("removed", true),
+		kv("client", client),
+		kv("tokens_removed", tokensRemoved),
+		kv("domains_removed", domainsRemoved),
+	)
+}
+
+func (c *AuthCredentialsRemoveCmd) removeAll(ctx context.Context, flags *RootFlags, u *ui.UI) error {
+	creds, err := config.ListClientCredentials()
+	if err != nil {
+		return err
+	}
+	if len(creds) == 0 {
+		return writeResult(ctx, u, kv("removed", 0))
+	}
+
+	names := make([]string, 0, len(creds))
+	for _, info := range creds {
+		names = append(names, info.Client)
+	}
+	if err := confirmDestructive(ctx, flags, fmt.Sprintf("remove all OAuth credentials (%s)", strings.Join(names, ", "))); err != nil {
+		return err
+	}
+
+	var allTokens []string
+	for _, info := range creds {
+		accounts := findAccountsForClient(info.Client)
+		if err := config.DeleteClientCredentialsFor(info.Client); err != nil {
+			return err
+		}
+		allTokens = append(allTokens, removeTokensForClient(info.Client, accounts)...)
+		removeDomainMappings(info.Client)
+	}
+
+	return writeResult(ctx, u,
+		kv("removed", len(creds)),
+		kv("clients", names),
+		kv("tokens_removed", allTokens),
+	)
+}
+
+// findAccountsForClient returns emails that have tokens stored under the given client.
+func findAccountsForClient(client string) []string {
+	store, err := openSecretsStore()
+	if err != nil {
+		return nil
+	}
+	tokens, err := store.ListTokens()
+	if err != nil {
+		return nil
+	}
+	var emails []string
+	for _, tok := range tokens {
+		tokClient, _ := config.NormalizeClientNameOrDefault(tok.Client)
+		if tokClient == client {
+			emails = append(emails, tok.Email)
+		}
+	}
+	return emails
+}
+
+// removeTokensForClient deletes tokens for the given accounts under the specified client.
+func removeTokensForClient(client string, emails []string) []string {
+	if len(emails) == 0 {
+		return nil
+	}
+	store, err := openSecretsStore()
+	if err != nil {
+		return nil
+	}
+	var removed []string
+	for _, email := range emails {
+		if err := store.DeleteToken(client, email); err == nil {
+			removed = append(removed, email)
+		}
+	}
+	return removed
+}
+
+// removeDomainMappings deletes config domain entries that point to the given client.
+func removeDomainMappings(client string) []string {
+	cfg, err := config.ReadConfig()
+	if err != nil {
+		return nil
+	}
+	var removed []string
+	for domain, mapped := range cfg.ClientDomains {
+		normalized, nerr := config.NormalizeClientNameOrDefault(mapped)
+		if nerr != nil {
+			continue
+		}
+		if normalized == client {
+			removed = append(removed, domain)
+			delete(cfg.ClientDomains, domain)
+		}
+	}
+	if len(removed) > 0 {
+		_ = config.WriteConfig(cfg)
+	}
+	return removed
+}
diff --git a/internal/config/credentials.go b/internal/config/credentials.go
index 529ac8c5..67283f4d 100644
--- a/internal/config/credentials.go
+++ b/internal/config/credentials.go
@@ -114,6 +114,23 @@ func ReadClientCredentialsFor(client string) (ClientCredentials, error) {
 	return c, nil
 }
 
+func DeleteClientCredentialsFor(client string) error {
+	path, err := ClientCredentialsPathFor(client)
+	if err != nil {
+		return fmt.Errorf("resolve credentials path: %w", err)
+	}
+
+	if err := os.Remove(path); err != nil {
+		if os.IsNotExist(err) {
+			return &CredentialsMissingError{Path: path, Cause: err}
+		}
+
+		return fmt.Errorf("delete credentials: %w", err)
+	}
+
+	return nil
+}
+
 func ClientCredentialsExists(client string) (bool, error) {
 	path, err := ClientCredentialsPathFor(client)
 	if err != nil {