diff --git a/cmd/root/root.go b/cmd/root/root.go
index 6b6de2a9baa..fc7b583c3c2 100644
--- a/cmd/root/root.go
+++ b/cmd/root/root.go
@@ -79,6 +79,7 @@ func New(ctx context.Context) *cobra.Command {
 		ctx = withCommandExecIdInUserAgent(ctx)
 		ctx = withUpstreamInUserAgent(ctx)
 		ctx = withInteractiveModeInUserAgent(ctx)
+		ctx = withHostInUserAgent(ctx)
 		ctx = InjectTestPidToUserAgent(ctx)
 		cmd.SetContext(ctx)
 		return nil
@@ -185,6 +186,7 @@ Stack Trace:
 		Command:         commandStr,
 		OperatingSystem: runtime.GOOS,
 		DbrVersion:      dbr.RuntimeVersion(ctx).String(),
+		Host:            string(cmdio.DetectHost(ctx)),
 		ExecutionTimeMs: time.Since(startTime).Milliseconds(),
 		ExitCode:        int64(exitCode),
 	})
diff --git a/cmd/root/user_agent_host.go b/cmd/root/user_agent_host.go
new file mode 100644
index 00000000000..2024dffc7c8
--- /dev/null
+++ b/cmd/root/user_agent_host.go
@@ -0,0 +1,24 @@
+// This file integrates terminal/IDE host detection with the user agent string.
+//
+// The detection logic is in libs/cmdio. This file retrieves the host from
+// the context and adds it to the user agent.
+//
+// Example user agent strings:
+//   - "cli/X.Y.Z ... host/vscode ..."
+//   - "cli/X.Y.Z ... host/cursor ..."
+//   - "cli/X.Y.Z ... host/unknown ..."
+package root
+
+import (
+	"context"
+
+	"github.com/databricks/cli/libs/cmdio"
+	"github.com/databricks/databricks-sdk-go/useragent"
+)
+
+// Key in the user agent.
+const hostKey = "host"
+
+func withHostInUserAgent(ctx context.Context) context.Context {
+	return useragent.InContext(ctx, hostKey, string(cmdio.DetectHost(ctx)))
+}
diff --git a/cmd/root/user_agent_host_test.go b/cmd/root/user_agent_host_test.go
new file mode 100644
index 00000000000..d639baac83b
--- /dev/null
+++ b/cmd/root/user_agent_host_test.go
@@ -0,0 +1,34 @@
+package root
+
+import (
+	"testing"
+
+	"github.com/databricks/databricks-sdk-go/useragent"
+	"github.com/stretchr/testify/assert"
+)
+
+// hostEnvKeys mirrors the env vars read by cmdio.DetectHost. Tests clear them
+// so the developer's shell environment cannot bleed into assertions.
+var hostEnvKeys = []string{
+	"TERM_PROGRAM",
+	"TERMINAL_EMULATOR",
+}
+
+func clearHostEnv(t *testing.T) {
+	for _, k := range hostEnvKeys {
+		t.Setenv(k, "")
+	}
+}
+
+func TestHostInUserAgent_Unknown(t *testing.T) {
+	clearHostEnv(t)
+	ctx := withHostInUserAgent(t.Context())
+	assert.Contains(t, useragent.FromContext(ctx), "host/unknown")
+}
+
+func TestHostInUserAgent_VSCode(t *testing.T) {
+	clearHostEnv(t)
+	t.Setenv("TERM_PROGRAM", "vscode")
+	ctx := withHostInUserAgent(t.Context())
+	assert.Contains(t, useragent.FromContext(ctx), "host/vscode")
+}
diff --git a/libs/cmdio/host.go b/libs/cmdio/host.go
new file mode 100644
index 00000000000..b91e90d79f0
--- /dev/null
+++ b/libs/cmdio/host.go
@@ -0,0 +1,68 @@
+package cmdio
+
+import (
+	"context"
+
+	"github.com/databricks/cli/libs/env"
+)
+
+// Host describes the terminal or IDE the CLI is being invoked from.
+// Values are an enum, never raw env values, so they are safe to log.
+type Host string
+
+const (
+	// HostVSCode covers TERM_PROGRAM=vscode, which is set by vanilla VSCode
+	// and every fork that inherits its terminal integration (Cursor, Windsurf,
+	// code-server, etc.). The forks don't expose a stable, trustworthy
+	// discriminator in env, so we deliberately don't try to split them apart.
+	HostVSCode Host = "vscode"
+
+	HostJetBrains     Host = "jetbrains"
+	HostAppleTerminal Host = "apple-terminal"
+	HostITerm         Host = "iterm"
+	HostWarp          Host = "warp"
+	HostWezTerm       Host = "wezterm"
+	HostGhostty       Host = "ghostty"
+	HostUnknown       Host = "unknown"
+)
+
+const (
+	envTermProgram      = "TERM_PROGRAM"
+	envTerminalEmulator = "TERMINAL_EMULATOR"
+)
+
+// DetectHost returns the terminal or IDE host the CLI is being run from,
+// derived from environment variables only.
+//
+// Only detections backed by direct observation or upstream documentation
+// are included. Anything we can't verify (Windsurf vs. Cursor split, Zed,
+// Hyper, Tabby, etc.) falls into HostUnknown until we see real evidence.
+//
+// Whether a user has a particular extension or AI agent active (Copilot,
+// Claude Code, Cursor Agent, etc.) is intentionally not modelled here.
+// That's an independent dimension, so a downstream query can ask "vscode
+// users without Copilot" by joining the two signals.
+func DetectHost(ctx context.Context) Host {
+	switch env.Get(ctx, envTermProgram) {
+	case "vscode":
+		return HostVSCode
+	case "Apple_Terminal":
+		return HostAppleTerminal
+	case "iTerm.app":
+		return HostITerm
+	case "WarpTerminal":
+		return HostWarp
+	case "WezTerm":
+		return HostWezTerm
+	case "ghostty":
+		return HostGhostty
+	}
+
+	// JediTerm is JetBrains' terminal library; sets TERMINAL_EMULATOR
+	// per https://github.com/JetBrains/jediterm/issues/253.
+	if env.Get(ctx, envTerminalEmulator) == "JetBrains-JediTerm" {
+		return HostJetBrains
+	}
+
+	return HostUnknown
+}
diff --git a/libs/cmdio/host_test.go b/libs/cmdio/host_test.go
new file mode 100644
index 00000000000..2c3a05111a7
--- /dev/null
+++ b/libs/cmdio/host_test.go
@@ -0,0 +1,85 @@
+package cmdio
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// envKeysToIsolate lists every environment variable read by DetectHost.
+// Tests clear all of them at the start so process env from the developer's
+// shell (e.g. TERM_PROGRAM=iTerm.app on a macOS dev machine) cannot leak in.
+var envKeysToIsolate = []string{
+	envTermProgram,
+	envTerminalEmulator,
+}
+
+func isolateHostEnv(t *testing.T, overrides map[string]string) {
+	for _, k := range envKeysToIsolate {
+		t.Setenv(k, "")
+	}
+	for k, v := range overrides {
+		t.Setenv(k, v)
+	}
+}
+
+func TestDetectHost(t *testing.T) {
+	tests := []struct {
+		name string
+		envs map[string]string
+		want Host
+	}{
+		{
+			name: "no env vars",
+			envs: nil,
+			want: HostUnknown,
+		},
+		{
+			name: "vscode and forks all classify as vscode",
+			envs: map[string]string{"TERM_PROGRAM": "vscode"},
+			want: HostVSCode,
+		},
+		{
+			name: "jetbrains",
+			envs: map[string]string{"TERMINAL_EMULATOR": "JetBrains-JediTerm"},
+			want: HostJetBrains,
+		},
+		{
+			name: "apple terminal",
+			envs: map[string]string{"TERM_PROGRAM": "Apple_Terminal"},
+			want: HostAppleTerminal,
+		},
+		{
+			name: "iterm",
+			envs: map[string]string{"TERM_PROGRAM": "iTerm.app"},
+			want: HostITerm,
+		},
+		{
+			name: "warp",
+			envs: map[string]string{"TERM_PROGRAM": "WarpTerminal"},
+			want: HostWarp,
+		},
+		{
+			name: "wezterm",
+			envs: map[string]string{"TERM_PROGRAM": "WezTerm"},
+			want: HostWezTerm,
+		},
+		{
+			name: "ghostty",
+			envs: map[string]string{"TERM_PROGRAM": "ghostty"},
+			want: HostGhostty,
+		},
+		{
+			name: "unknown TERM_PROGRAM falls through to unknown",
+			envs: map[string]string{"TERM_PROGRAM": "somethingnew"},
+			want: HostUnknown,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			isolateHostEnv(t, tt.envs)
+			assert.Equal(t, tt.want, DetectHost(t.Context()))
+		})
+	}
+}
diff --git a/libs/telemetry/protos/databricks_cli_log.go b/libs/telemetry/protos/databricks_cli_log.go
index 64baa6b384a..0792ee03032 100644
--- a/libs/telemetry/protos/databricks_cli_log.go
+++ b/libs/telemetry/protos/databricks_cli_log.go
@@ -23,6 +23,11 @@ type ExecutionContext struct {
 	// If true, the CLI is being run from a Databricks notebook / cluster web terminal.
 	FromWebTerminal bool `json:"from_web_terminal,omitempty"`
 
+	// Terminal or IDE the CLI is being run from, detected from environment
+	// variables (TERM_PROGRAM, TERMINAL_EMULATOR, etc.). Enum value, never a
+	// raw env value. See libs/cmdio/host.go for the full enum.
+	Host string `json:"host,omitempty"`
+
 	// Time taken for the CLI command to execute.
 	// We want to serialize the zero value as well so the omitempty tag is not set.
 	ExecutionTimeMs int64 `json:"execution_time_ms"`