diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b76491..6a9c9ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+### Changed
+
+- `--output json` is now a pure serialisation flag; it no longer forces non-interactive mode. Interactive pickers and prompts (e.g. `grant request get -o json` with no ID, `grant request submit -o json` without `--target`/`--role`) work in a TTY, writing prompts to stderr and JSON to stdout.
+
 ### Added
 
 - `grant request` command group for managing access requests through the approval workflow
diff --git a/CLAUDE.md b/CLAUDE.md
index 3363e78..d3143fe 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -98,7 +98,7 @@ Custom `SCAAccessService` follows SDK conventions:
 
 ## JSON Output
 - `--output` / `-o` persistent flag on root command: `text` (default) or `json`
-- Validated in `PersistentPreRunE`; JSON mode forces `IsTerminalFunc` to return false (non-interactive)
+- Validated in `PersistentPreRunE`. `--output json` is a pure serialisation flag; it does not affect interactivity — interactive prompts still run in a TTY and write to stderr while JSON goes to stdout
 - `cmd/output.go` — `outputFormat` var, `isJSONOutput()`, `writeJSON(w, data)`
 - `cmd/output_types.go` — JSON structs: `cloudElevationOutput`, `groupElevationJSON`, `sessionOutput`, `statusOutput`, `revocationOutput`, `favoriteOutput`, `awsCredentialOutput`, `accessRequestOutput`, `accessRequestListOutput`
 - All commands support JSON: root elevation, `env`, `status`, `revoke`, `favorites list`, `request list`, `request get`, `request submit`, `request cancel`, `request approve`, `request reject`
diff --git a/cmd/request_picker.go b/cmd/request_picker.go
index f87ad85..3307f0b 100644
--- a/cmd/request_picker.go
+++ b/cmd/request_picker.go
@@ -32,9 +32,6 @@ var resolveRequestIDFn = resolveRequestIDInteractive
 // shows the interactive picker, returning the chosen request ID.
 func resolveRequestIDInteractive(ctx context.Context, svc accessRequestService, scope pickerScope) (string, error) {
 	if !ui.IsInteractive() {
-		if isJSONOutput() {
-			return "", errors.New("request ID is required with --output json; run `grant request list --output json` to find it")
-		}
 		return "", fmt.Errorf("%w; pass the request ID as a positional argument (run `grant request list` to find it)", ui.ErrNotInteractive)
 	}
 
diff --git a/cmd/request_picker_test.go b/cmd/request_picker_test.go
index d17bf05..c04ebdb 100644
--- a/cmd/request_picker_test.go
+++ b/cmd/request_picker_test.go
@@ -45,28 +45,6 @@ func TestResolveRequestIDInteractive_NonInteractive(t *testing.T) {
 	}
 }
 
-func TestResolveRequestIDInteractive_JSONMode(t *testing.T) {
-	withInteractiveTTY(t, false)
-	orig := outputFormat
-	outputFormat = "json"
-	t.Cleanup(func() { outputFormat = orig })
-
-	svc := &capturingMockAccessRequestService{}
-	_, err := resolveRequestIDInteractive(t.Context(), svc, pickerScope{emptyMsg: "access requests"})
-	if err == nil {
-		t.Fatal("expected error")
-	}
-	if errors.Is(err, ui.ErrNotInteractive) {
-		t.Errorf("JSON mode error should not wrap ErrNotInteractive")
-	}
-	if !strings.Contains(err.Error(), "--output json") {
-		t.Errorf("expected --output json hint, got %v", err)
-	}
-	if strings.Contains(err.Error(), "requires a terminal") {
-		t.Errorf("JSON mode error should not mention terminal: %v", err)
-	}
-}
-
 func TestResolveRequestIDInteractive_EmptyList(t *testing.T) {
 	withInteractiveTTY(t, true)
 
diff --git a/cmd/root.go b/cmd/root.go
index a063e60..1a80e7c 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -101,9 +101,6 @@ Examples:
 			if outputFormat != "text" && outputFormat != "json" {
 				return fmt.Errorf("invalid output format %q: must be one of: text, json", outputFormat)
 			}
-			if isJSONOutput() {
-				ui.IsTerminalFunc = func(fd uintptr) bool { return false }
-			}
 			return nil
 		},
 		RunE: runFn,