fix: Windows cross-platform compatibility

internal/cli/cli_test.go

@@ -13,6 +13,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 )
@@ -34,7 +35,11 @@ func TestBinaryIntegration(t *testing.T) {
 	defer func() { _ = os.RemoveAll(tmpDir) }()
 
 	// Build the binary
-	binaryPath := filepath.Join(tmpDir, "ctx-test-binary")
+	binaryName := "ctx-test-binary"
+	if runtime.GOOS == "windows" {
+		binaryName += ".exe"
+	}
+	binaryPath := filepath.Join(tmpDir, binaryName)
 	buildCmd := exec.Command("go", "build", "-o", binaryPath, "./cmd/ctx") //nolint:gosec // G204: test builds local binary
 	buildCmd.Env = append(os.Environ(), "CGO_ENABLED=0")
 

internal/cli/doctor/doctor_test.go

@@ -216,7 +216,9 @@ func TestDoctor_PluginNotInstalled(t *testing.T) {
 	setupContextDir(t)
 
 	// Set HOME to a temp dir with no plugin files.
-	t.Setenv("HOME", t.TempDir())
+	tmpHome0 := t.TempDir()
+	t.Setenv("HOME", tmpHome0)
+	t.Setenv("USERPROFILE", tmpHome0)
 
 	cmd := Cmd()
 	var out bytes.Buffer
@@ -238,6 +240,7 @@ func TestDoctor_PluginInstalledNotEnabled(t *testing.T) {
 
 	tmpHome := t.TempDir()
 	t.Setenv("HOME", tmpHome)
+	t.Setenv("USERPROFILE", tmpHome)
 
 	// Create installed_plugins.json with ctx plugin.
 	pluginsDir := filepath.Join(tmpHome, ".claude", "plugins")

internal/cli/initialize/init_test.go

@@ -347,6 +347,7 @@ func TestRunInit_Minimal(t *testing.T) {
 	}
 	defer func() { _ = os.Chdir(origDir) }()
 	t.Setenv("HOME", tmpDir)
+	t.Setenv("USERPROFILE", tmpDir)
 	t.Setenv(config.EnvSkipPathCheck, config.EnvTrue)
 
 	cmd := Cmd()
@@ -381,6 +382,7 @@ func TestRunInit_Force(t *testing.T) {
 	}
 	defer func() { _ = os.Chdir(origDir) }()
 	t.Setenv("HOME", tmpDir)
+	t.Setenv("USERPROFILE", tmpDir)
 	t.Setenv(config.EnvSkipPathCheck, config.EnvTrue)
 
 	cmd := Cmd()
@@ -413,6 +415,7 @@ func TestRunInit_Merge(t *testing.T) {
 	}
 	defer func() { _ = os.Chdir(origDir) }()
 	t.Setenv("HOME", tmpDir)
+	t.Setenv("USERPROFILE", tmpDir)
 	t.Setenv(config.EnvSkipPathCheck, config.EnvTrue)
 
 	if err = os.WriteFile(config.FileClaudeMd, []byte("# My Project\n\nExisting.\n"), 0600); err != nil {

internal/cli/journal/core/generate.go

@@ -163,9 +163,10 @@ func InjectSourceLink(content, sourcePath string) string {
 	if pathErr != nil {
 		absPath = sourcePath
 	}
-	relPath := filepath.Join(
+	absPath = filepath.ToSlash(absPath)
+	relPath := filepath.ToSlash(filepath.Join(
 		config.DirContext, config.DirJournal, filepath.Base(absPath),
-	)
+	))
 	link := fmt.Sprintf(config.TplJournalSourceLink+nl+nl,
 		absPath, relPath, relPath)
 
@@ -209,19 +210,19 @@ func GenerateZensicalToml(
 	if len(topics) > 0 {
 		sb.WriteString(fmt.Sprintf(config.TplJournalNavItem+nl,
 			config.JournalLabelTopics,
-			filepath.Join(config.JournalDirTopics, config.FilenameIndex)),
+			filepath.ToSlash(filepath.Join(config.JournalDirTopics, config.FilenameIndex))),
 		)
 	}
 	if len(keyFiles) > 0 {
 		sb.WriteString(fmt.Sprintf(config.TplJournalNavItem+nl,
 			config.JournalLabelFiles,
-			filepath.Join(config.JournalDirFiles, config.FilenameIndex)),
+			filepath.ToSlash(filepath.Join(config.JournalDirFiles, config.FilenameIndex))),
 		)
 	}
 	if len(sessionTypes) > 0 {
 		sb.WriteString(fmt.Sprintf(config.TplJournalNavItem+nl,
 			config.JournalLabelTypes,
-			filepath.Join(config.JournalDirTypes, config.FilenameIndex)),
+			filepath.ToSlash(filepath.Join(config.JournalDirTypes, config.FilenameIndex))),
 		)
 	}
 

internal/cli/journal/core/generate_test.go

@@ -7,6 +7,7 @@
 package core
 
 import (
+	"path/filepath"
 	"strings"
 	"testing"
 )
@@ -62,10 +63,14 @@ func TestGenerateIndex(t *testing.T) {
 }
 
 func TestInjectSourceLink_WithFrontmatter(t *testing.T) {
+	// Use a real temp path so filepath.Abs() is a no-op on all platforms.
+	srcPath := filepath.Join(t.TempDir(), ".context", "journal", "test.md")
+	wantAbs := filepath.ToSlash(srcPath)
+
 	content := "---\ntitle: Test\n---\n\n# Heading\n"
-	result := InjectSourceLink(content, "/home/user/.context/journal/test.md")
+	result := InjectSourceLink(content, srcPath)
 
-	if !strings.Contains(result, "[View source](file:///home/user/.context/journal/test.md)") {
+	if !strings.Contains(result, "[View source](file://"+wantAbs+")") {
 		t.Errorf("missing file:// link:\n%s", result)
 	}
 	if !strings.Contains(result, ".context/journal/test.md") {
@@ -77,10 +82,14 @@ func TestInjectSourceLink_WithFrontmatter(t *testing.T) {
 }
 
 func TestInjectSourceLink_NoFrontmatter(t *testing.T) {
+	// Use a real temp path so filepath.Abs() is a no-op on all platforms.
+	srcPath := filepath.Join(t.TempDir(), "file.md")
+	wantAbs := filepath.ToSlash(srcPath)
+
 	content := "# Heading\n\nSome text.\n"
-	result := InjectSourceLink(content, "/path/to/file.md")
+	result := InjectSourceLink(content, srcPath)
 
-	if !strings.HasPrefix(result, "*[View source](file:///path/to/file.md)") {
+	if !strings.HasPrefix(result, "*[View source](file://"+wantAbs+")") {
 		t.Errorf("source link not at top:\n%s", result)
 	}
 	if !strings.Contains(result, ".context/journal/file.md") {

internal/cli/pad/pad_test.go

@@ -12,6 +12,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 
@@ -35,6 +36,7 @@ func setupEncrypted(t *testing.T) string {
 		t.Fatal(err)
 	}
 	t.Setenv("HOME", dir)
+	t.Setenv("USERPROFILE", dir)
 	t.Cleanup(func() {
 		_ = os.Chdir(origDir)
 		rc.Reset()
@@ -74,6 +76,7 @@ func setupPlaintext(t *testing.T) string {
 		t.Fatal(err)
 	}
 	t.Setenv("HOME", dir)
+	t.Setenv("USERPROFILE", dir)
 	t.Cleanup(func() {
 		_ = os.Chdir(origDir)
 		rc.Reset()
@@ -479,6 +482,7 @@ func TestMv_OutOfRange(t *testing.T) {
 func TestNoKey_EncryptedFileExists(t *testing.T) {
 	dir := t.TempDir()
 	t.Setenv("HOME", dir)
+	t.Setenv("USERPROFILE", dir)
 	origDir, _ := os.Getwd()
 	if err := os.Chdir(dir); err != nil {
 		t.Fatal(err)
@@ -802,7 +806,7 @@ func TestKeyPath(t *testing.T) {
 	if !strings.HasSuffix(path, ".key") {
 		t.Errorf("core.KeyPath() = %q, want suffix %q", path, ".key")
 	}
-	if !strings.Contains(path, ".ctx/") {
+	if !strings.Contains(path, ".ctx"+string(filepath.Separator)) {
 		t.Errorf("core.KeyPath() = %q, want global path containing .ctx/", path)
 	}
 }
@@ -824,6 +828,7 @@ func TestEnsureKey_EncFileExistsNoKey(t *testing.T) {
 		t.Fatal(err)
 	}
 	t.Setenv("HOME", dir)
+	t.Setenv("USERPROFILE", dir)
 	t.Cleanup(func() {
 		_ = os.Chdir(origDir)
 		rc.Reset()
@@ -859,6 +864,7 @@ func TestEnsureKey_GeneratesNewKey(t *testing.T) {
 		t.Fatal(err)
 	}
 	t.Setenv("HOME", dir)
+	t.Setenv("USERPROFILE", dir)
 	t.Cleanup(func() {
 		_ = os.Chdir(origDir)
 		rc.Reset()
@@ -2342,6 +2348,9 @@ func TestExport_Encrypted(t *testing.T) {
 }
 
 func TestExport_FilePermissions(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("file permission bits not supported on Windows")
+	}
 	dir := setupPlaintext(t)
 
 	f := filepath.Join(dir, "file.txt")

internal/cli/recall/core/format_test.go

@@ -14,6 +14,14 @@ import (
 	"github.com/ActiveMemory/ctx/internal/recall/parser"
 )
 
+// setLocalUTC forces time.Local to UTC for the duration of the test.
+// On Windows, t.Setenv("TZ", "UTC") does not affect time.Local.
+func setLocalUTC(t *testing.T) {
+	orig := time.Local
+	time.Local = time.UTC
+	t.Cleanup(func() { time.Local = orig })
+}
+
 // stubDuration implements the interface{ Minutes() float64 } used by FormatDuration.
 type stubDuration struct{ mins float64 }
 
@@ -342,7 +350,7 @@ func TestFormatPartNavigation(t *testing.T) {
 // --- FormatJournalEntryPart tests ---
 
 func TestFormatJournalEntryPart_SinglePart(t *testing.T) {
-	t.Setenv("TZ", "UTC")
+	setLocalUTC(t)
 
 	s := &parser.Session{
 		ID:             "abc12345-session-id",
@@ -409,7 +417,7 @@ func TestFormatJournalEntryPart_SinglePart(t *testing.T) {
 }
 
 func TestFormatJournalEntryPart_MultiPart(t *testing.T) {
-	t.Setenv("TZ", "UTC")
+	setLocalUTC(t)
 
 	s := &parser.Session{
 		ID:             "multi-session-id-12345678",
@@ -468,7 +476,7 @@ func TestFormatJournalEntryPart_MultiPart(t *testing.T) {
 }
 
 func TestFormatJournalEntryPart_WithToolUse(t *testing.T) {
-	t.Setenv("TZ", "UTC")
+	setLocalUTC(t)
 
 	s := &parser.Session{
 		ID:        "tool-session-id-1234",
@@ -546,7 +554,7 @@ func TestFormatJournalEntryPart_WithToolUse(t *testing.T) {
 }
 
 func TestFormatJournalFilename_WithSlugOverride(t *testing.T) {
-	t.Setenv("TZ", "UTC")
+	setLocalUTC(t)
 
 	s := &parser.Session{
 		ID:        "abc12345-full-session-uuid",
@@ -568,7 +576,7 @@ func TestFormatJournalFilename_WithSlugOverride(t *testing.T) {
 }
 
 func TestFormatJournalEntryPart_SessionIDInFrontmatter(t *testing.T) {
-	t.Setenv("TZ", "UTC")
+	setLocalUTC(t)
 
 	s := &parser.Session{
 		ID:        "abc12345-full-session-uuid",
@@ -592,7 +600,7 @@ func TestFormatJournalEntryPart_SessionIDInFrontmatter(t *testing.T) {
 }
 
 func TestFormatJournalEntryPart_TitleInFrontmatterAndHeading(t *testing.T) {
-	t.Setenv("TZ", "UTC")
+	setLocalUTC(t)
 
 	s := &parser.Session{
 		ID:        "abc12345-full-session-uuid",
@@ -625,7 +633,7 @@ func TestFormatJournalEntryPart_TitleInFrontmatterAndHeading(t *testing.T) {
 }
 
 func TestFormatJournalEntryPart_NoTitleUsesSlug(t *testing.T) {
-	t.Setenv("TZ", "UTC")
+	setLocalUTC(t)
 
 	s := &parser.Session{
 		ID:        "abc12345-full-session-uuid",