chore(deps): update github.com/charmbracelet/ultraviolet digest to a45b7c8

CHANGELOG.md

@@ -1,5 +1,28 @@
 # Changelog
 
+## v0.0.18
+
+- Require Go 1.27.3 and migrate Bubbles, Bubble Tea, Huh, and Lip Gloss to their v2 modules under `charm.land`.
+- Update TUI rendering and keyboard events for Bubble Tea v2 while preserving alternate-screen behavior.
+- Route paste events to the focused editor, size input fields explicitly, and keep host lists within the terminal height.
+- Reject ambiguous cached shortcuts and skip duplicate hostnames during cache refresh.
+- Use paginated, unambiguous host lookups for SSH connections.
+- Accept shortcut domains with or without a leading dot during cold lookups.
+- Parse combined SSH options and preserve explicit users and ports supplied through `-o`.
+- Merge cache changes under a file lock to preserve updates from concurrent processes.
+- Honor configured resolver strategies during refresh and remove entries that no longer resolve safely.
+- Check the host kind before reusing a cached IP for a TUI selection.
+
+## v0.0.17
+
+- Update Go module dependencies to the latest versions within their existing module paths, including used transitive test dependencies.
+- Remove obsolete indirect requirements and refresh module checksums with `go mod tidy`.
+
+## v0.0.16
+
+- Enable Bash, Zsh, and Fish completion for the configured command alias, such as `j`.
+- Update or remove generated alias completion files when the command alias changes.
+
 ## v0.0.15
 
 - Use `https://git.zb-server.de` for release download links and API requests instead of the runner's internal Gitea service URL.

README.md

@@ -169,6 +169,14 @@ it for new shells. The command alias takes priority over a host alias with the
 same name and works even when no servers are cached. Environment override:
 `NETSSH_SHELL_ALIAS=j`.
 
+The command alias also supports shell completion: `j ser<Tab>` suggests cached
+server names, just like `netssh ser<Tab>`. The wizard, shell hook, installer, and
+`netssh completion install` maintain the alias completion files automatically.
+Changing or disabling the alias removes its old generated completion files.
+Bash requires bash-completion to load user completion files; for Zsh, include
+`~/.zfunc` in `fpath` before running `compinit` as described below. Fish loads
+completion files automatically. Open a new terminal after changing the alias.
+
 ### API tokens
 
 NetBox supports two token formats:
@@ -242,6 +250,8 @@ Resolution order:
 2. **Domain expansion** — if the input contains no dot, each configured domain is appended and tried (`web01` → `web01.example.com`). If no cache hit, NetBox is queried with the expanded name.
 3. **Hyphen folding** (`strip_hyphens: true`) — hyphens are inserted back before looking up in the cache (`fsn1web01` → `fsn1-web01.example.com`). This only works when the host is already cached; run `netssh cache refresh` first.
 
+Domains may be configured with or without a leading dot. If several cached hosts normalize to the same shortcut, the connection is rejected; use the full hostname. Live host lookups check every result page and reject duplicate exact names.
+
 | Input | Config | Resolved as |
 |-------|--------|-------------|
 | `web01` | `domains: [.example.com]` | `web01.example.com` |
@@ -393,6 +403,8 @@ netssh search app-           # prints matching hostnames, one per line
 
 Strategies are tried in the configured order; the first to succeed wins.
 
+Cache refresh uses the same strategies as a direct connection. To allow the primary IP as a fallback, include `primary_ip` in the strategy list. Hosts that cannot be resolved, or have ambiguous names in the refresh results, are removed from the cache and reported as warnings.
+
 | Name | Description |
 |------|-------------|
 | `primary_ip` | Returns the `primary_ip4` (or `primary_ip6`) set in NetBox. No extra API call. |

cmd/netssh/connection_test.go

@@ -0,0 +1,197 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"testing"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/cache"
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/netbox"
+)
+
+type connectionTestHost struct {
+	ID         int    `json:"id"`
+	Name       string `json:"name"`
+	PrimaryIP4 *struct {
+		Address string `json:"address"`
+	} `json:"primary_ip4,omitempty"`
+}
+
+func connectionTestServer(t *testing.T, devices, vms []connectionTestHost) *httptest.Server {
+	t.Helper()
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		var hosts []connectionTestHost
+		switch r.URL.Path {
+		case "/api/dcim/devices/":
+			hosts = devices
+		case "/api/virtualization/virtual-machines/":
+			hosts = vms
+		case "/api/ipam/ip-addresses/":
+			fmt.Fprint(w, `{"count":0,"results":[]}`)
+			return
+		default:
+			http.NotFound(w, r)
+			return
+		}
+		query := strings.ToLower(r.URL.Query().Get("name__ic"))
+		matched := make([]connectionTestHost, 0)
+		for _, host := range hosts {
+			if strings.Contains(strings.ToLower(host.Name), query) {
+				matched = append(matched, host)
+			}
+		}
+		offset, _ := strconv.Atoi(r.URL.Query().Get("offset"))
+		limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
+		if limit <= 0 {
+			limit = 50
+		}
+		start, end := min(offset, len(matched)), min(offset+limit, len(matched))
+		json.NewEncoder(w).Encode(map[string]any{"count": len(matched), "results": matched[start:end]})
+	}))
+	t.Cleanup(srv.Close)
+	return srv
+}
+
+func TestFindSSHHostBeyondFirstPage(t *testing.T) {
+	var devices []connectionTestHost
+	for i := range 50 {
+		devices = append(devices, connectionTestHost{ID: i + 1, Name: fmt.Sprintf("web-extra-%02d", i)})
+	}
+	devices = append(devices, connectionTestHost{ID: 51, Name: "web"})
+	srv := connectionTestServer(t, devices, nil)
+	host, err := findSSHHost(context.Background(), netbox.NewClient(srv.URL, "token", 0), "web", nil)
+	if err != nil || host.ID != 51 {
+		t.Fatalf("host beyond first page not resolved: %+v, %v", host, err)
+	}
+}
+
+func TestFindSSHHostDomainExpansion(t *testing.T) {
+	for _, domain := range []string{"example.com", ".example.com", " .example.com "} {
+		t.Run(domain, func(t *testing.T) {
+			srv := connectionTestServer(t, []connectionTestHost{{ID: 1, Name: "web.example.com"}}, nil)
+			host, err := findSSHHost(context.Background(), netbox.NewClient(srv.URL, "token", 0), "web", []string{domain})
+			if err != nil || host.Name != "web.example.com" {
+				t.Fatalf("domain expansion failed: %+v, %v", host, err)
+			}
+		})
+	}
+}
+
+func TestFindSSHHostRejectsAmbiguity(t *testing.T) {
+	srv := connectionTestServer(t, []connectionTestHost{{ID: 1, Name: "web"}, {ID: 2, Name: "web.example.com"}}, []connectionTestHost{{ID: 3, Name: "web"}})
+	_, err := findSSHHost(context.Background(), netbox.NewClient(srv.URL, "token", 0), "web", []string{"example.com"})
+	if err == nil || errors.Is(err, netbox.ErrHostNotFound) || !strings.Contains(err.Error(), "2 exact matches") {
+		t.Fatalf("ambiguous name accepted or expanded: %v", err)
+	}
+}
+
+func TestFindSSHHostDoesNotHideAPIErrors(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		http.Error(w, "unavailable", http.StatusServiceUnavailable)
+	}))
+	defer srv.Close()
+	_, err := findSSHHost(context.Background(), netbox.NewClient(srv.URL, "token", 0), "web", []string{"example.com"})
+	if err == nil || errors.Is(err, netbox.ErrHostNotFound) {
+		t.Fatalf("API failure hidden as missing host: %v", err)
+	}
+}
+
+func TestFindSSHHostNotFound(t *testing.T) {
+	srv := connectionTestServer(t, nil, nil)
+	_, err := findSSHHost(context.Background(), netbox.NewClient(srv.URL, "token", 0), "missing", []string{"example.com"})
+	if !errors.Is(err, netbox.ErrHostNotFound) {
+		t.Fatalf("want missing-host error, got %v", err)
+	}
+}
+
+func TestCacheRefreshHonorsResolverAndRemovesUnsafeEntries(t *testing.T) {
+	for _, tc := range []struct {
+		name, strategies string
+		wantCached       bool
+	}{
+		{"management only", "[management_subnet]", false},
+		{"explicit primary fallback", "[management_subnet, primary_ip]", true},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			host := connectionTestHost{ID: 1, Name: "web", PrimaryIP4: &struct {
+				Address string `json:"address"`
+			}{Address: "192.0.2.1/24"}}
+			srv := connectionTestServer(t, []connectionTestHost{host}, nil)
+			path := prepareRefreshTest(t, srv.URL, tc.strategies)
+			c := cache.New(path, 3600)
+			c.Upsert(cache.Entry{Name: "web", IP: "192.0.2.99", Kind: "device"})
+			if err := c.Save(); err != nil {
+				t.Fatal(err)
+			}
+			cmd := rootCmd()
+			cmd.SetArgs([]string{"cache", "refresh"})
+			if err := cmd.Execute(); err != nil {
+				t.Fatal(err)
+			}
+			if err := c.Load(); err != nil {
+				t.Fatal(err)
+			}
+			got, fresh := c.Get("web")
+			if tc.wantCached {
+				if !fresh || got.IP != "192.0.2.1" {
+					t.Fatalf("explicit fallback failed: %+v", got)
+				}
+			} else if got.Name != "" {
+				t.Fatalf("unsafe primary IP retained: %+v", got)
+			}
+		})
+	}
+}
+
+func TestCacheRefreshSkipsAmbiguousNames(t *testing.T) {
+	host := connectionTestHost{ID: 1, Name: "web", PrimaryIP4: &struct {
+		Address string `json:"address"`
+	}{Address: "192.0.2.1/24"}}
+	vm := host
+	vm.ID = 2
+	srv := connectionTestServer(t, []connectionTestHost{host}, []connectionTestHost{vm})
+	path := prepareRefreshTest(t, srv.URL, "[primary_ip]")
+	c := cache.New(path, 3600)
+	c.Upsert(cache.Entry{Name: "web", IP: "192.0.2.99", Kind: "device"})
+	if err := c.Save(); err != nil {
+		t.Fatal(err)
+	}
+	cmd := rootCmd()
+	cmd.SetArgs([]string{"cache", "refresh"})
+	if err := cmd.Execute(); err != nil {
+		t.Fatal(err)
+	}
+	if err := c.Load(); err != nil {
+		t.Fatal(err)
+	}
+	if len(c.All()) != 0 {
+		t.Fatalf("ambiguous host cached: %+v", c.All())
+	}
+}
+
+func prepareRefreshTest(t *testing.T, baseURL, strategies string) string {
+	t.Helper()
+	configDir := t.TempDir()
+	t.Setenv("HOME", t.TempDir())
+	t.Setenv("XDG_CONFIG_HOME", configDir)
+	t.Setenv("XDG_CACHE_HOME", t.TempDir())
+	path := filepath.Join(t.TempDir(), "hosts.json")
+	t.Setenv("NETSSH_CACHE_PATH", path)
+	t.Setenv("NETSSH_NETBOX_URL", baseURL)
+	t.Setenv("NETSSH_NETBOX_TOKEN", "token")
+	t.Setenv("NETSSH_SHELL_ALIAS", "")
+	data := fmt.Sprintf("resolver:\n  strategies: %s\n  management_subnets: [10.0.0.0/8]\n", strategies)
+	if err := os.WriteFile(filepath.Join(configDir, "netssh.yaml"), []byte(data), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	return path
+}

cmd/netssh/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"os"
 	"os/exec"
@@ -12,7 +13,7 @@ import (
 	"text/tabwriter"
 	"time"
 
-	tea "github.com/charmbracelet/bubbletea"
+	tea "charm.land/bubbletea/v2"
 	"github.com/spf13/cobra"
 
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/cache"
@@ -118,9 +119,13 @@ func runSSHWrapper(args []string) {
 	// If a stale match is found, use the canonical name for the NetBox re-fetch below.
 	lookupHost := parsed.Host
 	shortcutsEnabled := len(cfg.Shortcuts.Domains) > 0 || cfg.Shortcuts.StripHyphens
-	if shortcutsEnabled {
+	if cached, _ := c.Get(lookupHost); shortcutsEnabled && cached.Name == "" {
 		normalize := shortcuts.MakeNormalizer(cfg.Shortcuts)
-		if entry, found, fresh := c.GetByShortcut(lookupHost, normalize); found {
+		entry, found, fresh, err := c.GetByShortcut(lookupHost, normalize)
+		if err != nil {
+			fatalf("%v", err)
+		}
+		if found {
 			if fresh {
 				c.MarkUsed(entry.Name)
 				_ = c.Save()
@@ -140,42 +145,9 @@ func runSSHWrapper(args []string) {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 
-	entries, err := nbClient.Search(ctx, lookupHost, netbox.SearchOptions{})
+	target, err := findSSHHost(ctx, nbClient, lookupHost, cfg.Shortcuts.Domains)
 	if err != nil {
-		fatalf("NetBox search failed: %v", err)
+		fatalf("NetBox: %v", err)
-	}
-
-	var target *netbox.HostEntry
-	for i, e := range entries {
-		if strings.EqualFold(e.Name, lookupHost) {
-			target = &entries[i]
-			break
-		}
-	}
-
-	// Domain expansion: if still no match and the input has no dots, try appending
-	// each configured domain suffix and re-querying NetBox.
-	if target == nil && !strings.Contains(parsed.Host, ".") && len(cfg.Shortcuts.Domains) > 0 {
-		for _, domain := range cfg.Shortcuts.Domains {
-			expanded := parsed.Host + domain
-			expandedEntries, searchErr := nbClient.Search(ctx, expanded, netbox.SearchOptions{})
-			if searchErr != nil {
-				continue
-			}
-			for i, e := range expandedEntries {
-				if strings.EqualFold(e.Name, expanded) {
-					target = &expandedEntries[i]
-					break
-				}
-			}
-			if target != nil {
-				break
-			}
-		}
-	}
-
-	if target == nil {
-		fatalf("host %q not found in NetBox", parsed.Host)
 	}
 
 	chain, err := resolver.New(cfg.Resolver)
@@ -183,7 +155,7 @@ func runSSHWrapper(args []string) {
 		fatalf("resolver: %v", err)
 	}
 
-	ip, err := chain.Resolve(ctx, target, nbClient)
+	ip, err := chain.Resolve(ctx, &target, nbClient)
 	if err != nil {
 		fatalf("IP resolution for %q: %v", parsed.Host, err)
 	}
@@ -195,6 +167,26 @@ func runSSHWrapper(args []string) {
 	connect(ip, parsed, args)
 }
 
+// findSSHHost uses the paginated, ambiguity-checking lookup for connection
+// targets. Only a genuine missing host permits trying configured suffixes.
+func findSSHHost(ctx context.Context, client *netbox.Client, name string, domains []string) (netbox.HostEntry, error) {
+	target, err := client.FindHost(ctx, name, "")
+	if !errors.Is(err, netbox.ErrHostNotFound) || strings.Contains(name, ".") {
+		return target, err
+	}
+	for _, domain := range domains {
+		domain = strings.TrimPrefix(strings.TrimSpace(domain), ".")
+		if domain == "" {
+			continue
+		}
+		target, err = client.FindHost(ctx, name+"."+domain, "")
+		if !errors.Is(err, netbox.ErrHostNotFound) {
+			return target, err
+		}
+	}
+	return netbox.HostEntry{}, fmt.Errorf("%w: %q", netbox.ErrHostNotFound, name)
+}
+
 func connect(ip string, parsed *internalssh.ParsedArgs, originalArgs []string) {
 	newArgs := internalssh.ReplaceHost(originalArgs, parsed.DestIdx, ip)
 	if err := internalssh.Exec(newArgs); err != nil {
@@ -217,7 +209,7 @@ func runTUI() {
 
 	m := tui.New(nbClient, c, cfg.SSH.DefaultUser, cfg.SSH.DefaultPort)
 	m.SetNotes(notes.New(cfg.NetBox.URL, nbClient))
-	p := tea.NewProgram(m, tea.WithAltScreen())
+	p := tea.NewProgram(m)
 	final, err := p.Run()
 	if err != nil {
 		fatalf("TUI: %v", err)
@@ -233,7 +225,7 @@ func runTUI() {
 	}
 
 	// Revalidate stale or live TUI results through the configured resolver chain.
-	if cached, fresh := c.Get(host.Name); fresh {
+	if cached, fresh := c.Get(host.Name); fresh && cached.Kind == host.Kind {
 		host.IP = cached.IP
 	} else {
 		if nbClient == nil {
@@ -388,7 +380,17 @@ func completionInstallCmd(root *cobra.Command) *cobra.Command {
 			if err := os.WriteFile(file, script, 0o644); err != nil {
 				return fmt.Errorf("writing %s: %w", file, err)
 			}
+			cfg, err := config.Load()
+			if err != nil {
+				return err
+			}
+			if err := hook.SyncCommandCompletion(cfg.Shell.Alias); err != nil {
+				return err
+			}
 			fmt.Printf("Completion installed → %s\n%s\n", file, note)
+			if cfg.Shell.Alias != "" {
+				fmt.Printf("Completion also enabled for alias %q.\n", cfg.Shell.Alias)
+			}
 			return nil
 		},
 	}
@@ -523,26 +525,31 @@ func cacheRefreshCmd() *cobra.Command {
 				return fmt.Errorf("resolver: %w", err)
 			}
 			written := 0
+			nameCounts := make(map[string]int)
+			for _, e := range entries {
+				nameCounts[strings.ToLower(e.Name)]++
+			}
 			for i := range entries {
 				e := &entries[i]
+				if nameCounts[strings.ToLower(e.Name)] > 1 {
+					c.Delete(e.Name)
+					fmt.Fprintf(os.Stderr, "warning: skipping ambiguous hostname %q\n", e.Name)
+					continue
+				}
 
-				var ip string
+				ip, err := chain.Resolve(ctx, e, nbClient)
-				if chain != nil {
+				if err != nil {
-					if resolved, err := chain.Resolve(ctx, e, nbClient); err == nil {
+					// Do not turn a failed configured strategy into a fresh
-						ip = resolved
+					// primary-IP cache hit that bypasses the resolver.
+					if ctx.Err() != nil {
+						return ctx.Err()
 					}
+					c.Delete(e.Name)
+					fmt.Fprintf(os.Stderr, "warning: skipping %s: %v\n", e.Name, err)
+					continue
 				}
-				if ip == "" {
+				c.Upsert(cache.Entry{Name: e.Name, IP: ip, Kind: e.Kind, Tags: e.Tags})
-					ip = e.PrimaryIP4
+				written++
-				}
-				if ip == "" {
-					ip = e.PrimaryIP6
-				}
-
-				if ip != "" {
-					c.Upsert(cache.Entry{Name: e.Name, IP: ip, Kind: e.Kind, Tags: e.Tags})
-					written++
-				}
 			}
 
 			if err := c.Save(); err != nil {

cmd/netssh/notes_test.go

@@ -42,6 +42,7 @@ func TestLocalNotesCLI(t *testing.T) {
 }
 
 func TestShellInitUpdatesAndRemovesCommandAliasWithoutHosts(t *testing.T) {
+	t.Setenv("HOME", t.TempDir())
 	t.Setenv("XDG_CONFIG_HOME", t.TempDir())
 	t.Setenv("XDG_CACHE_HOME", t.TempDir())
 	t.Setenv("NETSSH_CACHE_PATH", filepath.Join(t.TempDir(), "hosts.json"))

go.mod

@@ -1,52 +1,53 @@
 module git.zb-server.de/Sebi/ssh-netbox-wrapper
 
-go 1.26.3
+go 1.27.3
 
 require (
-	github.com/charmbracelet/bubbles v1.0.0
+	charm.land/bubbles/v2 v2.2.1
-	github.com/charmbracelet/bubbletea v1.3.10
+	charm.land/bubbletea/v2 v2.1.0
-	github.com/charmbracelet/huh v1.0.0
+	charm.land/huh/v2 v2.0.3
-	github.com/charmbracelet/lipgloss v1.1.0
+	charm.land/lipgloss/v2 v2.0.6
 	github.com/spf13/cobra v1.10.2
 	github.com/spf13/viper v1.21.0
+	golang.org/x/sys v0.49.0
 )
 
 require (
 	github.com/atotto/clipboard v0.1.4 // indirect
-	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/catppuccin/go v0.3.0 // indirect
-	github.com/charmbracelet/colorprofile v0.4.1 // indirect
+	github.com/charmbracelet/colorprofile v0.4.3 // indirect
-	github.com/charmbracelet/x/ansi v0.11.6 // indirect
+	github.com/charmbracelet/ultraviolet v0.0.0-20261023060817-a45b7c86333f // indirect
-	github.com/charmbracelet/x/cellbuf v0.0.15 // indirect
+	github.com/charmbracelet/x/ansi v0.11.9 // indirect
-	github.com/charmbracelet/x/exp/strings v0.0.0-20240722160745-212f7b056ed0 // indirect
+	github.com/charmbracelet/x/exp/golden v0.1.0 // indirect
+	github.com/charmbracelet/x/exp/ordered v0.1.0 // indirect
+	github.com/charmbracelet/x/exp/strings v0.1.0 // indirect
 	github.com/charmbracelet/x/term v0.2.2 // indirect
-	github.com/clipperhouse/displaywidth v0.9.0 // indirect
+	github.com/charmbracelet/x/termios v0.1.1 // indirect
-	github.com/clipperhouse/stringish v0.1.1 // indirect
+	github.com/charmbracelet/x/windows v0.2.2 // indirect
-	github.com/clipperhouse/uax29/v2 v2.5.0 // indirect
+	github.com/charmbracelet/x/xpty v0.1.4 // indirect
-	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/clipperhouse/displaywidth v0.11.0 // indirect
-	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
+	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
-	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/dustin/go-humanize v1.1.0 // indirect
-	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
+	github.com/fsnotify/fsnotify v1.10.1 // indirect
+	github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
+	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.4.1 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.31 // indirect
-	github.com/mattn/go-localereader v0.0.1 // indirect
-	github.com/mattn/go-runewidth v0.0.19 // indirect
 	github.com/mitchellh/hashstructure/v2 v2.0.2 // indirect
-	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
-	github.com/muesli/termenv v0.16.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.4.3 // indirect
-	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
-	github.com/sagikazarmark/locafero v0.11.0 // indirect
+	github.com/rogpeppe/go-internal v1.16.0 // indirect
-	github.com/sahilm/fuzzy v0.1.1 // indirect
+	github.com/sagikazarmark/locafero v0.12.0 // indirect
-	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
+	github.com/sahilm/fuzzy v0.1.3 // indirect
 	github.com/spf13/afero v1.15.0 // indirect
 	github.com/spf13/cast v1.10.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
+	github.com/stretchr/testify v1.12.1 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
-	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	github.com/xo/terminfo v1.2.0 // indirect
-	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	go.yaml.in/yaml/v3 v3.0.5 // indirect
-	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/sync v0.24.0 // indirect
-	golang.org/x/text v0.28.0 // indirect
+	golang.org/x/text v0.43.0 // indirect
 )

go.sum

@@ -1,64 +1,58 @@
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 github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
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-github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
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 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/sagikazarmark/locafero v0.11.0 h1:1iurJgmM9G3PA/I+wWYIOw/5SyBtxapeHDcg+AAIFXc=
+github.com/sagikazarmark/locafero v0.12.0 h1:/NQhBAkUb4+fH1jivKHWusDYFjMOOKU88eegjfxfHb4=
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-github.com/sahilm/fuzzy v0.1.1 h1:ceu5RHF8DGgoi+/dR5PsECjCDH1BE3Fnmpo7aVXOdRA=
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-github.com/sahilm/fuzzy v0.1.1/go.mod h1:VFvziUEIMCrT6A6tw2RFIXPXXmzXbOsSHF0DOI8ZK9Y=
+github.com/sahilm/fuzzy v0.1.3/go.mod h1:au6//VbVSqu6DFrkL2CfjlJ5iURpNCPeE+1GwY3XsT8=
-github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 h1:+jumHNA0Wrelhe64i8F6HNlS8pkoyMv5sreGx2Ry5Rw=
-github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8/go.mod h1:3n1Cwaq1E1/1lhQhtRK2ts/ZwZEhjcQeJQ1RuC6Q/8U=
 github.com/spf13/afero v1.15.0 h1:b/YBCLWAJdFWJTN9cLhiXXcD7mzKn9Dm86dNnfyQw1I=
 github.com/spf13/afero v1.15.0/go.mod h1:NC2ByUVxtQs4b3sIUphxK0NioZnmxgyCrfzeuq8lxMg=
 github.com/spf13/cast v1.10.0 h1:h2x0u2shc1QuLHfxi+cTJvs30+ZAHOGRic8uyGTDWxY=
@@ -109,24 +91,19 @@ github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
 github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/viper v1.21.0 h1:x5S+0EU27Lbphp4UKm1C+1oQO+rKx36vfCoaVebLFSU=
 github.com/spf13/viper v1.21.0/go.mod h1:P0lhsswPGWD/1lZJ9ny3fYnVqxiegrlNrEmgLjbTCAY=
-github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.12.1 h1:EuwCh5fleGS7H32xRwO3wRGT7DxrDhLAT6FF8MpWDWE=
-github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/stretchr/testify v1.12.1/go.mod h1:MDEgiDPPsNp5cuIrHPPCyornHKgEVbtFUmoNlxoYthg=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
 github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
-github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
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-github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
+github.com/xo/terminfo v1.2.0/go.mod h1:lGzkSo8Fe7IRh/w+Gqz7n5mDog4FVXCj3gy/DYTBqio=
-go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
-golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
+go.yaml.in/yaml/v3 v3.0.5 h1:N6y/pJk8buWs9NY5ERU2HSMfm+IuD/OtfdAnq6kESPw=
-golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
+go.yaml.in/yaml/v3 v3.0.5/go.mod h1:HVTZu1O7/Vkt2N+BFy8Zza+lnLsABggaTM2ZpNIGuKg=
-golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sync v0.24.0 h1:iqiDrGoDgyuvAKrhLQthUEzU/R378N78gXbBjxed7oA=
-golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sync v0.24.0/go.mod h1:sUUOizhqBxiL6pEWpqNLUiaJn1ShEbZ6BBqskPbjZm0=
-golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.49.0 h1:XbzkgYJHdqh/8m2Uu0W/dQv8nktxx4BFHp1M0gROTXA=
-golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
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-golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/cache/cache.go

@@ -2,13 +2,17 @@ package cache
 
 import (
 	"encoding/json"
-	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/storage"
+	"fmt"
 	"os"
 	"path/filepath"
 	"sort"
 	"strings"
 	"sync"
 	"time"
+
+	"golang.org/x/sys/unix"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/storage"
 )
 
 type Entry struct {
@@ -20,8 +24,18 @@ type Entry struct {
 	LastUsed time.Time `json:"last_used,omitempty"`
 }
 
+type changeKind uint8
+
+const (
+	upsertChange changeKind = iota
+	deleteChange
+	usageChange
+)
+
 type Cache struct {
 	mu           sync.RWMutex
+	dirty        map[string]changeKind
+	cleared      bool
 	entries      map[string]Entry
 	path         string
 	ttl          time.Duration
@@ -39,6 +53,7 @@ func New(path string, ttlSeconds int) *Cache {
 	}
 	return &Cache{
 		entries:      make(map[string]Entry),
+		dirty:        make(map[string]changeKind),
 		path:         path,
 		ttl:          time.Duration(ttlSeconds) * time.Second,
 		refreshStamp: stamp,
@@ -94,6 +109,8 @@ func (c *Cache) Load() error {
 		return err
 	}
 
+	c.dirty = make(map[string]changeKind)
+	c.cleared = false
 	c.entries = make(map[string]Entry, len(df.Entries))
 	for _, e := range df.Entries {
 		c.entries[e.Name] = e
@@ -101,23 +118,80 @@ func (c *Cache) Load() error {
 	return nil
 }
 
+// Save merges only local changes under a process-wide file lock. Atomic rename
+// alone prevents torn JSON but cannot prevent lost updates from another process.
 func (c *Cache) Save() error {
-	c.mu.RLock()
+	c.mu.Lock()
-	df := diskFormat{Entries: make([]Entry, 0, len(c.entries))}
+	defer c.mu.Unlock()
-	for _, e := range c.entries {
-		df.Entries = append(df.Entries, e)
-	}
-	c.mu.RUnlock()
-
 	if err := os.MkdirAll(filepath.Dir(c.path), 0o755); err != nil {
 		return err
 	}
+	lock, err := os.OpenFile(c.path+".lock", os.O_CREATE|os.O_RDWR, 0o600)
+	if err != nil {
+		return err
+	}
+	defer lock.Close()
+	if err := unix.Flock(int(lock.Fd()), unix.LOCK_EX); err != nil {
+		return err
+	}
+	defer unix.Flock(int(lock.Fd()), unix.LOCK_UN)
 
+	merged := make(map[string]Entry)
+	if !c.cleared {
+		data, err := os.ReadFile(c.path)
+		if err != nil && !os.IsNotExist(err) {
+			return err
+		}
+		if err == nil {
+			var df diskFormat
+			if err := json.Unmarshal(data, &df); err != nil {
+				return err
+			}
+			for _, e := range df.Entries {
+				merged[e.Name] = e
+			}
+		}
+	}
+	for name, change := range c.dirty {
+		if change == deleteChange {
+			delete(merged, name)
+			continue
+		}
+		e := c.entries[name]
+		old, exists := merged[name]
+		if change == usageChange && !exists {
+			// A connection finishing after a refresh or clear must not
+			// restore an entry that the other process removed.
+			continue
+		}
+		if exists {
+			lastUsed := e.LastUsed
+			if change == usageChange || old.CachedAt.After(e.CachedAt) {
+				e = old
+			}
+			if old.LastUsed.After(lastUsed) {
+				lastUsed = old.LastUsed
+			}
+			e.LastUsed = lastUsed
+		}
+		merged[name] = e
+	}
+	df := diskFormat{Entries: make([]Entry, 0, len(merged))}
+	for _, e := range merged {
+		df.Entries = append(df.Entries, e)
+	}
+	sort.Slice(df.Entries, func(i, j int) bool { return df.Entries[i].Name < df.Entries[j].Name })
 	data, err := json.MarshalIndent(df, "", "  ")
 	if err != nil {
 		return err
 	}
-	return storage.WriteFile(c.path, data, 0o600)
+	if err := storage.WriteFile(c.path, data, 0o600); err != nil {
+		return err
+	}
+	c.entries = merged
+	c.dirty = make(map[string]changeKind)
+	c.cleared = false
+	return nil
 }
 
 func (c *Cache) Upsert(e Entry) {
@@ -127,9 +201,18 @@ func (c *Cache) Upsert(e Entry) {
 		e.LastUsed = old.LastUsed
 	}
 	c.entries[e.Name] = e
+	c.dirty[e.Name] = upsertChange
 	c.mu.Unlock()
 }
 
+// Delete removes an entry when a refresh can no longer resolve it safely.
+func (c *Cache) Delete(name string) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	delete(c.entries, name)
+	c.dirty[name] = deleteChange
+}
+
 // MarkUsed records the current time as LastUsed for the named entry.
 // It is a no-op if the entry does not exist.
 func (c *Cache) MarkUsed(name string) {
@@ -138,6 +221,9 @@ func (c *Cache) MarkUsed(name string) {
 	if e, ok := c.entries[name]; ok {
 		e.LastUsed = time.Now()
 		c.entries[name] = e
+		if _, changed := c.dirty[name]; !changed {
+			c.dirty[name] = usageChange
+		}
 	}
 }
 
@@ -179,19 +265,20 @@ func (c *Cache) Search(prefix string) []Entry {
 	return out
 }
 
-// GetByShortcut scans all entries and returns the first whose normalized name matches
+// GetByShortcut rejects collisions instead of choosing a random map entry.
-// the normalized shortcut. Returns (entry, found, fresh).
+func (c *Cache) GetByShortcut(shortcut string, normalize func(string) string) (entry Entry, found bool, fresh bool, err error) {
-func (c *Cache) GetByShortcut(shortcut string, normalize func(string) string) (entry Entry, found bool, fresh bool) {
 	c.mu.RLock()
 	defer c.mu.RUnlock()
 	norm := normalize(shortcut)
 	for _, e := range c.entries {
 		if normalize(e.Name) == norm {
-			isFresh := c.ttl > 0 && time.Since(e.CachedAt) < c.ttl
+			if found {
-			return e, true, isFresh
+				return Entry{}, false, false, fmt.Errorf("ambiguous shortcut %q; use a full hostname", shortcut)
+			}
+			entry, found = e, true
 		}
 	}
-	return Entry{}, false, false
+	return entry, found, found && c.ttl > 0 && time.Since(entry.CachedAt) < c.ttl, nil
 }
 
 // Get returns an entry and reports whether it is still within the TTL.
@@ -212,6 +299,8 @@ func (c *Cache) Get(name string) (entry Entry, fresh bool) {
 func (c *Cache) Clear() {
 	c.mu.Lock()
 	c.entries = make(map[string]Entry)
+	c.dirty = make(map[string]changeKind)
+	c.cleared = true
 	c.mu.Unlock()
 }
 

internal/cache/cache_test.go

@@ -314,7 +314,7 @@ func TestGetByShortcut_MatchFresh(t *testing.T) {
 		return s
 	}
 
-	e, found, fresh := c.GetByShortcut("web01", normalize)
+	e, found, fresh, _ := c.GetByShortcut("web01", normalize)
 	if !found {
 		t.Fatal("expected entry to be found")
 	}
@@ -340,7 +340,7 @@ func TestGetByShortcut_MatchStale(t *testing.T) {
 		return s
 	}
 
-	_, found, fresh := c.GetByShortcut("web01", normalize)
+	_, found, fresh, _ := c.GetByShortcut("web01", normalize)
 	if !found {
 		t.Fatal("expected entry to be found even when stale")
 	}
@@ -353,7 +353,7 @@ func TestGetByShortcut_NotFound(t *testing.T) {
 	c := New("", 3600)
 	c.Upsert(Entry{Name: "db01.example.com", IP: "10.0.0.2", Kind: "device"})
 
-	_, found, _ := c.GetByShortcut("web01", func(s string) string { return s })
+	_, found, _, _ := c.GetByShortcut("web01", func(s string) string { return s })
 	if found {
 		t.Error("should not find an entry that does not match the shortcut")
 	}
@@ -361,7 +361,7 @@ func TestGetByShortcut_NotFound(t *testing.T) {
 
 func TestGetByShortcut_EmptyCache(t *testing.T) {
 	c := New("", 3600)
-	_, found, _ := c.GetByShortcut("web01", func(s string) string { return s })
+	_, found, _, _ := c.GetByShortcut("web01", func(s string) string { return s })
 	if found {
 		t.Error("empty cache should return found=false")
 	}
@@ -381,7 +381,7 @@ func TestGetByShortcut_MultiDomain(t *testing.T) {
 		return s
 	}
 
-	e, found, _ := c.GetByShortcut("web01", normalize)
+	e, found, _, _ := c.GetByShortcut("web01", normalize)
 	if !found {
 		t.Fatal("should match entry with second configured domain")
 	}

internal/cache/concurrency_test.go

@@ -0,0 +1,182 @@
+package cache
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestShortcutRejectsAmbiguousTargets(t *testing.T) {
+	c := New("", 3600)
+	c.Upsert(Entry{Name: "web.prod.example", IP: "10.0.0.1"})
+	c.Upsert(Entry{Name: "web.dev.example", IP: "10.0.0.2"})
+	normalize := func(s string) string { return strings.SplitN(s, ".", 2)[0] }
+	for range 100 {
+		entry, found, fresh, err := c.GetByShortcut("web", normalize)
+		if err == nil || found || fresh || entry.Name != "" {
+			t.Fatalf("ambiguous shortcut returned target: %+v, %v, %v, %v", entry, found, fresh, err)
+		}
+	}
+}
+
+func TestSaveMergesIndependentlyLoadedCaches(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "hosts.json")
+	a, b := New(path, 3600), New(path, 3600)
+	for _, c := range []*Cache{a, b} {
+		if err := c.Load(); err != nil {
+			t.Fatal(err)
+		}
+	}
+	a.Upsert(Entry{Name: "a", IP: "10.0.0.1"})
+	b.Upsert(Entry{Name: "b", IP: "10.0.0.2"})
+	for _, c := range []*Cache{a, b} {
+		if err := c.Save(); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := a.Load(); err != nil {
+		t.Fatal(err)
+	}
+	if len(a.All()) != 2 {
+		t.Fatalf("lost an update: %+v", a.All())
+	}
+
+	// Saving a stale usage update must retain newer IPs and both usage times.
+	if err := b.Load(); err != nil {
+		t.Fatal(err)
+	}
+	b.MarkUsed("a")
+	used, _ := b.Get("a")
+	a.Upsert(Entry{Name: "a", IP: "10.0.0.3"})
+	if err := a.Save(); err != nil {
+		t.Fatal(err)
+	}
+	if err := b.Save(); err != nil {
+		t.Fatal(err)
+	}
+	got, _ := b.Get("a")
+	if got.IP != "10.0.0.3" || !got.LastUsed.Equal(used.LastUsed) {
+		t.Fatalf("lost refreshed IP or usage: %+v", got)
+	}
+
+	b.Delete("a")
+	if err := b.Save(); err != nil {
+		t.Fatal(err)
+	}
+	if err := a.Load(); err != nil {
+		t.Fatal(err)
+	}
+	if got, _ := a.Get("a"); got.Name != "" {
+		t.Fatalf("deleted entry survived: %+v", got)
+	}
+	a.Clear()
+	if err := a.Save(); err != nil {
+		t.Fatal(err)
+	}
+	if err := b.Load(); err != nil {
+		t.Fatal(err)
+	}
+	if len(b.All()) != 0 {
+		t.Fatal("clear merged old entries back in")
+	}
+}
+
+func TestSaveAcrossProcesses(t *testing.T) {
+	if path := os.Getenv("NETSSH_TEST_CACHE_WRITER_PATH"); path != "" {
+		c := New(path, 3600)
+		if err := c.Load(); err != nil {
+			t.Fatal(err)
+		}
+		c.Upsert(Entry{Name: os.Getenv("NETSSH_TEST_CACHE_WRITER_NAME"), IP: "10.0.0.1"})
+		if err := c.Save(); err != nil {
+			t.Fatal(err)
+		}
+		return
+	}
+	path := filepath.Join(t.TempDir(), "hosts.json")
+	const writers = 8
+	cmds := make([]*exec.Cmd, writers)
+	for i := range cmds {
+		cmd := exec.Command(os.Args[0], "-test.run=^TestSaveAcrossProcesses$")
+		cmd.Env = append(os.Environ(), "NETSSH_TEST_CACHE_WRITER_PATH="+path, fmt.Sprintf("NETSSH_TEST_CACHE_WRITER_NAME=host-%d", i))
+		cmd.Stdout, cmd.Stderr = os.Stdout, os.Stderr
+		if err := cmd.Start(); err != nil {
+			t.Fatal(err)
+		}
+		cmds[i] = cmd
+	}
+	for _, cmd := range cmds {
+		if err := cmd.Wait(); err != nil {
+			t.Error(err)
+		}
+	}
+	c := New(path, 3600)
+	if err := c.Load(); err != nil {
+		t.Fatal(err)
+	}
+	if len(c.All()) != writers {
+		t.Fatalf("lost concurrent updates: got %d, want %d", len(c.All()), writers)
+	}
+}
+
+func TestSavePreservesNewerUsageFromDisk(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "hosts.json")
+	a := New(path, 3600)
+	a.Upsert(Entry{Name: "web", IP: "10.0.0.1", LastUsed: time.Now()})
+	if err := a.Save(); err != nil {
+		t.Fatal(err)
+	}
+	b := New(path, 3600)
+	if err := b.Load(); err != nil {
+		t.Fatal(err)
+	}
+	a.MarkUsed("web")
+	used, _ := a.Get("web")
+	if err := a.Save(); err != nil {
+		t.Fatal(err)
+	}
+	b.Upsert(Entry{Name: "web", IP: "10.0.0.2"})
+	if err := b.Save(); err != nil {
+		t.Fatal(err)
+	}
+	got, _ := b.Get("web")
+	if got.IP != "10.0.0.2" || !got.LastUsed.Equal(used.LastUsed) {
+		t.Fatalf("lost data: %+v", got)
+	}
+}
+
+func TestUsageSaveDoesNotRestoreRemovedHosts(t *testing.T) {
+	for _, clear := range []bool{false, true} {
+		t.Run(fmt.Sprintf("clear=%v", clear), func(t *testing.T) {
+			path := filepath.Join(t.TempDir(), "hosts.json")
+			a := New(path, 3600)
+			a.Upsert(Entry{Name: "web", IP: "10.0.0.1"})
+			if err := a.Save(); err != nil {
+				t.Fatal(err)
+			}
+			b := New(path, 3600)
+			if err := b.Load(); err != nil {
+				t.Fatal(err)
+			}
+			b.MarkUsed("web")
+			if clear {
+				a.Clear()
+			} else {
+				a.Delete("web")
+			}
+			if err := a.Save(); err != nil {
+				t.Fatal(err)
+			}
+			if err := b.Save(); err != nil {
+				t.Fatal(err)
+			}
+			if len(b.All()) != 0 {
+				t.Fatalf("usage update restored removed entry: %+v", b.All())
+			}
+		})
+	}
+}

internal/hook/aliases.go

@@ -49,7 +49,14 @@ func WriteAliasFiles(entries []AliasEntry) error {
 		return err
 	}
 	writeFishAliasFile(entries) // best-effort — never blocks the caller on failure
-	return nil
+	alias := ""
+	for _, entry := range entries {
+		if entry.Host == "" {
+			alias = entry.Name
+			break
+		}
+	}
+	return SyncCommandCompletion(alias)
 }
 
 func writeShAliasFile(entries []AliasEntry) error {

internal/hook/completion.go

@@ -0,0 +1,116 @@
+package hook
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/config"
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/storage"
+)
+
+const completionMarker = "# netssh command alias completion — generated automatically"
+
+// SyncCommandCompletion installs lazy loaders for the configured command alias.
+// The loaders obtain the canonical completion from the current netssh binary,
+// so aliases configured by the wizard work without a separate completion install.
+func SyncCommandCompletion(alias string) error {
+	if err := config.ValidateCommandAlias(alias); err != nil {
+		return err
+	}
+	statePath := filepath.Join(filepath.Dir(AliasesPath()), "completion_alias")
+	data, err := os.ReadFile(statePath)
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	previous := strings.TrimSpace(string(data))
+	if err := config.ValidateCommandAlias(previous); err != nil {
+		return fmt.Errorf("invalid completion alias state: %w", err)
+	}
+	if alias == "" && previous == "" {
+		return nil
+	}
+
+	for _, shell := range []string{"bash", "zsh", "fish"} {
+		if previous != "" && previous != alias {
+			path := commandCompletionPath(shell, previous)
+			data, err := os.ReadFile(path)
+			if err != nil && !os.IsNotExist(err) {
+				return err
+			}
+			// Only delete files owned by netssh; preserve any user replacements.
+			if strings.HasPrefix(string(data), completionMarker+"\n") || strings.HasPrefix(string(data), "#compdef "+previous+"\n"+completionMarker+"\n") {
+				if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+					return err
+				}
+			}
+		}
+		if alias == "" {
+			continue
+		}
+		if shell == "fish" {
+			if _, err := os.Stat(FishConfigDir()); os.IsNotExist(err) {
+				continue
+			} else if err != nil {
+				return err
+			}
+		}
+		path := commandCompletionPath(shell, alias)
+		script := commandCompletionScript(shell, alias)
+		existing, err := os.ReadFile(path)
+		if err != nil && !os.IsNotExist(err) {
+			return err
+		}
+		if string(existing) == script {
+			continue
+		}
+		if err := storage.WriteFile(path, []byte(script), 0o644); err != nil {
+			return fmt.Errorf("writing %s alias completion: %w", shell, err)
+		}
+	}
+	if alias == "" {
+		if err := os.Remove(statePath); err != nil && !os.IsNotExist(err) {
+			return err
+		}
+		return nil
+	}
+	return storage.WriteFile(statePath, []byte(alias+"\n"), 0o600)
+}
+
+func commandCompletionPath(shell, alias string) string {
+	switch shell {
+	case "bash":
+		return filepath.Join(os.Getenv("HOME"), ".local", "share", "bash-completion", "completions", alias)
+	case "zsh":
+		return filepath.Join(os.Getenv("HOME"), ".zfunc", "_"+alias)
+	default:
+		return filepath.Join(FishConfigDir(), "completions", alias+".fish")
+	}
+}
+
+func commandCompletionScript(shell, alias string) string {
+	switch shell {
+	case "bash":
+		return fmt.Sprintf(`%s
+source <(netssh completion bash)
+if [[ $(type -t compopt) == builtin ]]; then
+    complete -o default -F __start_netssh %s
+else
+    complete -o default -o nospace -F __start_netssh %s
+fi
+`, completionMarker, alias, alias)
+	case "zsh":
+		return fmt.Sprintf(`#compdef %s
+%s
+source <(netssh completion zsh)
+compdef _netssh %s
+_netssh "$@"
+`, alias, completionMarker, alias)
+	default:
+		return fmt.Sprintf(`%s
+netssh completion fish | source
+complete --command %s --wraps netssh
+`, completionMarker, alias)
+	}
+}

internal/hook/completion_test.go

@@ -0,0 +1,171 @@
+package hook_test
+
+import (
+	"bytes"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/hook"
+	"github.com/spf13/cobra"
+)
+
+func completionEnvironment(t *testing.T) map[string]string {
+	t.Helper()
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("XDG_CONFIG_HOME", filepath.Join(home, "config"))
+	t.Setenv("XDG_CACHE_HOME", filepath.Join(home, "cache"))
+	if err := os.MkdirAll(hook.FishConfigDir(), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	return map[string]string{
+		"bash": filepath.Join(home, ".local", "share", "bash-completion", "completions", "j"),
+		"zsh":  filepath.Join(home, ".zfunc", "_j"),
+		"fish": filepath.Join(hook.FishConfigDir(), "completions", "j.fish"),
+	}
+}
+
+func TestCommandCompletionTracksAliasChanges(t *testing.T) {
+	paths := completionEnvironment(t)
+	if err := hook.WriteAliasFiles([]hook.AliasEntry{{Name: "j"}}); err != nil {
+		t.Fatal(err)
+	}
+	for _, path := range paths {
+		if _, err := os.Stat(path); err != nil {
+			t.Fatal(err)
+		}
+	}
+	// A manually replaced completion file must survive removal of the old alias.
+	custom := "# user-owned completion\n"
+	if err := os.WriteFile(paths["bash"], []byte(custom), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := hook.WriteAliasFiles([]hook.AliasEntry{{Name: "k"}}); err != nil {
+		t.Fatal(err)
+	}
+	for shell, path := range paths {
+		if shell == "bash" {
+			data, err := os.ReadFile(path)
+			if err != nil || string(data) != custom {
+				t.Fatal("user completion was removed")
+			}
+		} else if _, err := os.Stat(path); !os.IsNotExist(err) {
+			t.Fatalf("stale %s completion remains: %v", shell, err)
+		}
+	}
+	if err := hook.WriteAliasFiles(nil); err != nil {
+		t.Fatal(err)
+	}
+	for _, path := range []string{
+		filepath.Join(os.Getenv("HOME"), ".local", "share", "bash-completion", "completions", "k"),
+		filepath.Join(os.Getenv("HOME"), ".zfunc", "_k"),
+		filepath.Join(hook.FishConfigDir(), "completions", "k.fish"),
+	} {
+		if _, err := os.Stat(path); !os.IsNotExist(err) {
+			t.Fatalf("disabled completion remains: %s: %v", path, err)
+		}
+	}
+}
+
+func TestCommandAliasCompletesServerNamesAcrossShells(t *testing.T) {
+	for _, shell := range []string{"bash", "zsh", "fish"} {
+		t.Run(shell, func(t *testing.T) {
+			executable, err := exec.LookPath(shell)
+			if err != nil {
+				t.Skipf("%s unavailable", shell)
+			}
+			paths := completionEnvironment(t)
+			if err := hook.SyncCommandCompletion("j"); err != nil {
+				t.Fatal(err)
+			}
+			fixtures := t.TempDir()
+			root := &cobra.Command{Use: "netssh"}
+			var canonical bytes.Buffer
+			switch shell {
+			case "bash":
+				err = root.GenBashCompletionV2(&canonical, true)
+			case "zsh":
+				err = root.GenZshCompletion(&canonical)
+			case "fish":
+				err = root.GenFishCompletion(&canonical, true)
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			if err := os.WriteFile(filepath.Join(fixtures, shell), canonical.Bytes(), 0o644); err != nil {
+				t.Fatal(err)
+			}
+			// Exercise Cobra's actual generated shell code with a deterministic backend.
+			backend := `#!/bin/bash
+case "$1" in
+ completion) cat "$COMPLETION_FIXTURES/$2" ;;
+ __complete|__completeNoDesc) printf 'server01\n:4\n' ;;
+ *) exit 1 ;;
+esac
+`
+			if err := os.WriteFile(filepath.Join(fixtures, "netssh"), []byte(backend), 0o755); err != nil {
+				t.Fatal(err)
+			}
+			t.Setenv("COMPLETION_FIXTURES", fixtures)
+			t.Setenv("ALIAS_COMPLETION", paths[shell])
+			t.Setenv("PATH", fixtures+string(os.PathListSeparator)+os.Getenv("PATH"))
+			var script string
+			var args []string
+			switch shell {
+			case "bash":
+				library := ""
+				for _, path := range []string{"/usr/share/bash-completion/bash_completion", "/etc/bash_completion"} {
+					if _, err := os.Stat(path); err == nil {
+						library = path
+						break
+					}
+				}
+				if library == "" {
+					t.Skip("bash-completion unavailable")
+				}
+				t.Setenv("BASH_COMPLETION_LIBRARY", library)
+				args = []string{"--noprofile", "--norc", "-c"}
+				script = `source "$BASH_COMPLETION_LIBRARY"
+shopt -s expand_aliases
+alias j=netssh
+_completion_loader j
+COMP_WORDS=(j ser)
+COMP_CWORD=1
+COMP_LINE='j ser'
+COMP_POINT=5
+COMP_TYPE=9
+COMP_KEY=9
+__start_netssh j ser j
+printf '%s\n' "${COMPREPLY[@]}"
+`
+			case "zsh":
+				args = []string{"-f", "-c"}
+				script = `fpath=("$HOME/.zfunc" $fpath)
+autoload -Uz compinit
+compinit -u -D
+alias j=netssh
+autoload -Uz _j
+# Capture matches without requiring an interactive ZLE completion widget.
+_describe() { print -rl -- "${completions[@]}"; }
+words=(j ser)
+CURRENT=2
+_j
+`
+			case "fish":
+				args = []string{"--no-config", "-c"}
+				script = `alias j netssh
+set -p fish_complete_path "$XDG_CONFIG_HOME/fish/completions"
+complete --do-complete 'j ser'
+`
+			}
+			cmd := exec.Command(executable, append(args, script)...)
+			out, err := cmd.CombinedOutput()
+			if err != nil || !strings.Contains(string(out), "server01") {
+				t.Fatalf("%s completion: %v\n%s", shell, err, out)
+			}
+		})
+	}
+}

internal/netbox/client.go

@@ -351,6 +351,9 @@ func stripPrefix(cidr string) string {
 	return cidr
 }
 
+// ErrHostNotFound distinguishes a missing exact match from API failures or ambiguity.
+var ErrHostNotFound = errors.New("host not found")
+
 // FindHost refuses ambiguous names so writes cannot target an arbitrary server.
 func (c *Client) FindHost(ctx context.Context, name, kind string) (HostEntry, error) {
 	if kind != "" && kind != "device" && kind != "vm" {
@@ -366,6 +369,9 @@ func (c *Client) FindHost(ctx context.Context, name, kind string) (HostEntry, er
 			matches = append(matches, e)
 		}
 	}
+	if len(matches) == 0 {
+		return HostEntry{}, fmt.Errorf("%w: %q", ErrHostNotFound, name)
+	}
 	if len(matches) != 1 {
 		return HostEntry{}, fmt.Errorf("host %q: found %d exact matches; use --kind or a unique hostname", name, len(matches))
 	}

internal/setup/wizard.go

@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/charmbracelet/huh"
+	"charm.land/huh/v2"
 
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/cache"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/config"

internal/ssh/args.go

@@ -4,7 +4,7 @@ import "strings"
 
 // flagsWithArg lists all SSH flags that consume the following argument.
 var flagsWithArg = map[byte]bool{
-	'b': true, 'c': true, 'D': true, 'E': true, 'e': true,
+	'B': true, 'P': true, 'b': true, 'c': true, 'D': true, 'E': true, 'e': true,
 	'F': true, 'I': true, 'i': true, 'J': true, 'L': true,
 	'l': true, 'm': true, 'o': true, 'O': true, 'p': true,
 	'Q': true, 'R': true, 'S': true, 'w': true, 'W': true,
@@ -32,18 +32,16 @@ func Parse(args []string) *ParsedArgs {
 		}
 
 		if strings.HasPrefix(arg, "-") && len(arg) > 1 {
-			flag := arg[1]
+			// OpenSSH accepts clusters such as -vp 2222 and -vladmin.
-			if flagsWithArg[flag] {
+			for j := 1; j < len(arg); j++ {
-				if len(arg) > 2 {
+				if flagsWithArg[arg[j]] {
-					// argument is attached, e.g. -p2222
+					if j == len(arg)-1 {
-					i++
+						i++
-				} else {
+					}
-					// argument is the next element, e.g. -p 2222
+					break
-					i += 2
 				}
-			} else {
-				i++
 			}
+			i++
 			continue
 		}
 
@@ -86,35 +84,41 @@ func ReplaceHost(args []string, destIdx int, newHost string) []string {
 	return result
 }
 
-// HasPortFlag reports whether a port was specified via -p in args.
+// HasPortFlag reports whether a port was explicitly supplied.
-func HasPortFlag(args []string) bool {
+func HasPortFlag(args []string) bool { return hasOption(args, 'p', "Port") }
-	if parsed := Parse(args); parsed != nil {
-		args = args[:parsed.DestIdx]
-	}
-	for i, a := range args {
-		if a == "-p" && i+1 < len(args) {
-			return true
-		}
-		if len(a) > 2 && a[0] == '-' && a[1] == 'p' {
-			return true
-		}
-	}
-	return false
-}
 
-// HasUserFlag reports whether a user was specified via -l in args.
+// HasUserFlag reports whether a login user was explicitly supplied.
-// Used to avoid overriding an explicit -l with the configured default user.
+func HasUserFlag(args []string) bool { return hasOption(args, 'l', "User") }
-func HasUserFlag(args []string) bool {
+
-	if parsed := Parse(args); parsed != nil {
+func hasOption(args []string, wanted byte, keyword string) bool {
-		args = args[:parsed.DestIdx]
+	for i := 0; i < len(args); i++ {
-	}
+		arg := args[i]
-	for i, a := range args {
+		if arg == "--" || len(arg) < 2 || arg[0] != '-' {
-		if a == "-l" && i+1 < len(args) {
+			break
-			return true
 		}
-		// handle attached form: -lroot
+		for j := 1; j < len(arg); j++ {
-		if len(a) > 2 && a[0] == '-' && a[1] == 'l' {
+			flag := arg[j]
-			return true
+			if !flagsWithArg[flag] {
+				continue
+			}
+			value := arg[j+1:]
+			if value == "" {
+				i++
+				if i >= len(args) {
+					return false
+				}
+				value = args[i]
+			}
+			if flag == wanted {
+				return true
+			}
+			if flag == 'o' {
+				fields := strings.FieldsFunc(value, func(r rune) bool { return r == '=' || r == ' ' || r == '\t' })
+				if len(fields) >= 2 && strings.EqualFold(fields[0], keyword) {
+					return true
+				}
+			}
+			break
 		}
 	}
 	return false

internal/ssh/args_regression_test.go

@@ -0,0 +1,46 @@
+package ssh
+
+import "testing"
+
+func TestParseOptionClusters(t *testing.T) {
+	for _, args := range [][]string{
+		{"-vp", "2222", "server"},
+		{"-vp2222", "server"},
+		{"-vAl", "admin", "server"},
+		{"-vladmin", "server"},
+		{"-B", "eth0", "server"},
+		{"-P", "production", "server"},
+	} {
+		t.Run(args[0], func(t *testing.T) {
+			assertParsed(t, Parse(args), "server", "", len(args)-1)
+		})
+	}
+}
+
+func TestExplicitSSHOptions(t *testing.T) {
+	for _, tc := range []struct {
+		name       string
+		args       []string
+		user, port bool
+	}{
+		{"cluster port separated", []string{"-vp", "2222", "server"}, false, true},
+		{"cluster user attached", []string{"-vladmin", "server"}, true, false},
+		{"o separated", []string{"-o", "User=admin", "-o", "Port=2222", "server"}, true, true},
+		{"o attached and case insensitive", []string{"-ouSeR=admin", "-oport=2222", "server"}, true, true},
+		{"o whitespace", []string{"-o", " User = admin", "-o", "Port\t2222", "server"}, true, true},
+		{"cluster o", []string{"-voUser=admin", "server"}, true, false},
+		{"option value looks like flag", []string{"-i", "-lroot", "-F", "-p2222", "server"}, false, false},
+		{"remote flags", []string{"server", "-p2222", "-o", "User=admin"}, false, false},
+		{"after double dash", []string{"--", "-lroot", "-p2222"}, false, false},
+		{"missing value", []string{"-vp"}, false, false},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := HasUserFlag(tc.args); got != tc.user {
+				t.Errorf("HasUserFlag(%v) = %v, want %v", tc.args, got, tc.user)
+			}
+			if got := HasPortFlag(tc.args); got != tc.port {
+				t.Errorf("HasPortFlag(%v) = %v, want %v", tc.args, got, tc.port)
+			}
+		})
+	}
+}

internal/tui/model.go

@@ -8,15 +8,15 @@ import (
 	"strings"
 	"time"
 
-	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/notes"
+	"charm.land/bubbles/v2/list"
-	"github.com/charmbracelet/bubbles/list"
+	"charm.land/bubbles/v2/textarea"
-	"github.com/charmbracelet/bubbles/textarea"
+	"charm.land/bubbles/v2/textinput"
-	"github.com/charmbracelet/bubbles/textinput"
+	tea "charm.land/bubbletea/v2"
-	tea "github.com/charmbracelet/bubbletea"
+	"charm.land/lipgloss/v2"
-	"github.com/charmbracelet/lipgloss"
 
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/cache"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/netbox"
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/notes"
 )
 
 // SelectedHost is returned when the user confirms a host in the TUI.
@@ -78,7 +78,7 @@ func (d compactDelegate) Render(w io.Writer, m list.Model, index int, item list.
 	if index == m.Index() {
 		line = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("86")).Render("> " + strings.TrimPrefix(line, "  "))
 	}
-	fmt.Fprintln(w, line)
+	fmt.Fprint(w, line)
 }
 
 // --- filter ---
@@ -221,6 +221,7 @@ func (m *Model) loadRecent() tea.Cmd {
 }
 
 func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	defer m.resizeList()
 	switch msg := msg.(type) {
 	case noteResultMsg:
 		m.noteBusy = false
@@ -240,18 +241,13 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	case tea.WindowSizeMsg:
 		m.width = msg.Width
 		m.height = msg.Height
-		extraRows := 4
+		m.input.SetWidth(max(1, msg.Width-lipgloss.Width(m.input.Prompt)))
-		if m.filterOpen {
+		m.filterInput.SetWidth(max(1, msg.Width-lipgloss.Width(m.filterInput.Prompt)))
-			extraRows++
+		m.editInput.SetWidth(max(1, msg.Width-lipgloss.Width("Connect as: ")))
-		}
-		if m.editMode {
-			extraRows += 2
-		}
-		m.list.SetSize(msg.Width, max(1, msg.Height-extraRows))
 		m.noteInput.SetWidth(max(10, msg.Width-4))
 		return m, nil
 
-	case tea.KeyMsg:
+	case tea.KeyPressMsg:
 		if msg.String() == "ctrl+c" {
 			return m, tea.Quit
 		}
@@ -427,10 +423,26 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	}
 
 	if m.noteMode {
+		if m.noteBusy {
+			return m, nil
+		}
 		var cmd tea.Cmd
 		m.noteInput, cmd = m.noteInput.Update(msg)
 		return m, cmd
 	}
+	// Paste and cursor events are separate from key presses in Bubble Tea v2.
+	// Route them to the focused editor as well.
+	if m.editMode {
+		var cmd tea.Cmd
+		m.editInput, cmd = m.editInput.Update(msg)
+		return m, cmd
+	}
+	if m.filterOpen {
+		var cmd tea.Cmd
+		m.filterInput, cmd = m.filterInput.Update(msg)
+		m.updateListItems(m.lastResults)
+		return m, cmd
+	}
 	// Forward to search input and restart debounce timer.
 	var cmds []tea.Cmd
 	var inputCmd tea.Cmd
@@ -449,7 +461,13 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	return m, tea.Batch(cmds...)
 }
 
-func (m *Model) View() string {
+func (m *Model) View() tea.View {
+	view := tea.NewView(m.viewContent())
+	view.AltScreen = true
+	return view
+}
+
+func (m *Model) viewContent() string {
 	if m.noteMode {
 		target := "local"
 		if m.noteRemote {
@@ -562,6 +580,28 @@ func (m *Model) updateListItems(entries []netbox.HostEntry) {
 		items[i] = hostItem{id: e.ID, name: e.Name, ip: ip, kind: e.Kind, tags: e.Tags}
 	}
 	m.list.SetItems(items)
+	m.resizeList()
+}
+
+// resizeList keeps the footer visible when the recent heading or editors change.
+func (m *Model) resizeList() {
+	if m.width <= 0 || m.height <= 0 {
+		return
+	}
+	extraRows := 5 // title, blank line, search, footer separator, footer
+	if m.recentMode && m.input.Value() == "" && len(m.list.Items()) > 0 {
+		extraRows++
+	}
+	if m.filterOpen {
+		extraRows++
+	}
+	if m.editMode {
+		extraRows++
+	}
+	height := max(1, m.height-extraRows)
+	if m.list.Width() != m.width || m.list.Height() != height {
+		m.list.SetSize(m.width, height)
+	}
 }
 
 // openEdit switches to edit mode for the given list item.

internal/tui/model_test.go

@@ -1,16 +1,18 @@
 package tui
 
 import (
+	"testing"
+
+	tea "charm.land/bubbletea/v2"
+
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/netbox"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/notes"
-	tea "github.com/charmbracelet/bubbletea"
-	"testing"
 )
 
 func TestTypingEDoesNotOpenConnectionEditor(t *testing.T) {
 	m := New(nil, nil, "")
 	m.updateListItems([]netbox.HostEntry{{Name: "server"}})
-	m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'e'}})
+	m.Update(tea.KeyPressMsg{Code: 'e', Text: "e"})
 	if m.editMode || m.input.Value() != "e" {
 		t.Fatal("e intercepted")
 	}
@@ -52,7 +54,7 @@ func TestFailedNoteLoadCannotBeSaved(t *testing.T) {
 	m := New(nil, nil, "")
 	m.SetNotes(&notes.Service{Dir: t.TempDir()})
 	m.noteMode = true
-	_, cmd := m.Update(tea.KeyMsg{Type: tea.KeyCtrlS})
+	_, cmd := m.Update(tea.KeyPressMsg{Code: 's', Mod: tea.ModCtrl})
 	if cmd != nil {
 		t.Fatal("save allowed before successful load")
 	}
@@ -63,7 +65,7 @@ func TestConnectionEditorKeepsOriginalHost(t *testing.T) {
 	first := hostItem{name: "first", ip: "10.0.0.1"}
 	m.openEdit(first)
 	m.updateListItems([]netbox.HostEntry{{Name: "second", PrimaryIP4: "10.0.0.2"}})
-	m.Update(tea.KeyMsg{Type: tea.KeyEnter})
+	m.Update(tea.KeyPressMsg{Code: tea.KeyEnter})
 	if m.selected == nil || m.selected.Name != "first" {
 		t.Fatalf("edited host changed: %+v", m.selected)
 	}

internal/tui/v2_test.go

@@ -0,0 +1,123 @@
+package tui
+
+import (
+	"strings"
+	"testing"
+
+	tea "charm.land/bubbletea/v2"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/netbox"
+)
+
+func TestV2PasteFollowsFocusedEditor(t *testing.T) {
+	t.Run("search", func(t *testing.T) {
+		m := New(nil, nil, "")
+		_, cmd := m.Update(tea.PasteMsg{Content: "web-ä"})
+		if m.input.Value() != "web-ä" || m.seq != 1 || cmd == nil {
+			t.Fatalf("paste did not start search: %q, seq %d", m.input.Value(), m.seq)
+		}
+	})
+	t.Run("connection editor", func(t *testing.T) {
+		m := New(nil, nil, "")
+		m.openEdit(hostItem{name: "web", ip: "10.0.0.1"})
+		m.editInput.SetValue("")
+		m.Update(tea.PasteMsg{Content: "ops@web:2222"})
+		m.Update(tea.KeyPressMsg{Code: tea.KeyEnter})
+		if m.selected == nil || m.selected.User != "ops" || m.selected.Port != "2222" {
+			t.Fatalf("paste lost in editor: %+v", m.selected)
+		}
+		if m.input.Value() != "" {
+			t.Fatal("editor paste changed search")
+		}
+	})
+	t.Run("filter", func(t *testing.T) {
+		m := New(nil, nil, "")
+		m.lastResults = []netbox.HostEntry{{Name: "vm", Kind: "vm"}, {Name: "device", Kind: "device"}}
+		m.updateListItems(m.lastResults)
+		m.Update(tea.KeyPressMsg{Code: 'f', Mod: tea.ModCtrl})
+		m.Update(tea.PasteMsg{Content: "kind:vm"})
+		if m.filterInput.Value() != "kind:vm" || len(m.list.Items()) != 1 {
+			t.Fatalf("paste did not filter: %q, %d results", m.filterInput.Value(), len(m.list.Items()))
+		}
+		if m.input.Value() != "" {
+			t.Fatal("filter paste changed search")
+		}
+	})
+	t.Run("notes", func(t *testing.T) {
+		m := New(nil, nil, "")
+		m.noteMode = true
+		m.input.Blur()
+		m.noteInput.Focus()
+		m.Update(tea.PasteMsg{Content: "First line\nSecond line"})
+		if m.noteInput.Value() != "First line\nSecond line" {
+			t.Fatalf("multiline paste lost: %q", m.noteInput.Value())
+		}
+		m.noteBusy = true
+		m.Update(tea.PasteMsg{Content: "must not change busy note"})
+		if m.noteInput.Value() != "First line\nSecond line" {
+			t.Fatal("paste edited note while loading/saving")
+		}
+	})
+}
+
+func TestV2ViewKeepsAlternateScreenInEachMode(t *testing.T) {
+	for _, mode := range []string{"search", "edit", "notes"} {
+		t.Run(mode, func(t *testing.T) {
+			m := New(nil, nil, "")
+			m.Update(tea.WindowSizeMsg{Width: 80, Height: 24})
+			if mode == "edit" {
+				m.openEdit(hostItem{name: "web"})
+			}
+			if mode == "notes" {
+				m.noteMode = true
+			}
+			view := m.View()
+			if !view.AltScreen || strings.TrimSpace(view.Content) == "" {
+				t.Fatalf("invalid %s view: %+v", mode, view)
+			}
+		})
+	}
+}
+
+func TestV2KeyReleaseDoesNotTypeTwice(t *testing.T) {
+	m := New(nil, nil, "")
+	m.Update(tea.KeyPressMsg{Code: 'e', Text: "e"})
+	m.Update(tea.KeyReleaseMsg{Code: 'e', Text: "e"})
+	if m.input.Value() != "e" {
+		t.Fatalf("key release changed input: %q", m.input.Value())
+	}
+	m.Update(tea.KeyPressMsg{Code: ' ', Text: " "})
+	if m.input.Value() != "e " {
+		t.Fatalf("space not inserted: %q", m.input.Value())
+	}
+}
+
+func TestV2ResizeShowsFullSearchPromptAndFooter(t *testing.T) {
+	m := New(nil, nil, "")
+	m.Update(tea.WindowSizeMsg{Width: 100, Height: 24})
+	var entries []netbox.HostEntry
+	for range 30 {
+		entries = append(entries, netbox.HostEntry{Name: "web", Kind: "device"})
+	}
+	m.updateListItems(entries)
+	view := m.View()
+	if m.input.Width() != 98 || m.filterInput.Width() != 92 || m.editInput.Width() != 88 {
+		t.Fatalf("editors were not sized for terminal: search=%d filter=%d edit=%d", m.input.Width(), m.filterInput.Width(), m.editInput.Width())
+	}
+	if !strings.Contains(view.Content, "earch hostname") || !strings.Contains(view.Content, "ctrl+c quit") {
+		t.Fatalf("search prompt or footer missing: %s", view.Content)
+	}
+	assertFits := func() {
+		t.Helper()
+		if rows := strings.Count(m.View().Content, "\n"); rows > 24 {
+			t.Fatalf("view overflows terminal: %d rows", rows)
+		}
+	}
+	assertFits()
+	m.lastResults = entries
+	m.Update(tea.KeyPressMsg{Code: 'f', Mod: tea.ModCtrl})
+	assertFits()
+	m.Update(tea.KeyPressMsg{Code: 'f', Mod: tea.ModCtrl})
+	m.Update(tea.KeyPressMsg{Code: 'e', Mod: tea.ModCtrl})
+	assertFits()
+}