diff --git a/src/ClaudeDo.Data/Environment/ExecutableResolver.cs b/src/ClaudeDo.Data/Environment/ExecutableResolver.cs
index a859dc14..7b6486d9 100644
--- a/src/ClaudeDo.Data/Environment/ExecutableResolver.cs
+++ b/src/ClaudeDo.Data/Environment/ExecutableResolver.cs
@@ -48,6 +48,10 @@ public static class ExecutableResolver
return null;
}
+ /// Expanded fallback directories tried when PATH search comes up empty (for diagnostics).
+ public static IReadOnlyList FallbackDirectories() =>
+ FallbackDirectoryTemplates.Select(SysEnvironment.ExpandEnvironmentVariables).ToList();
+
public static ShimStartInfo BuildShimStartInfo(string shimPath, IReadOnlyList arguments)
{
var parts = new List { "/c", Quote(shimPath) };
diff --git a/src/ClaudeDo.Installer/Checks/ClaudeAuthCheck.cs b/src/ClaudeDo.Installer/Checks/ClaudeAuthCheck.cs
new file mode 100644
index 00000000..9206f920
--- /dev/null
+++ b/src/ClaudeDo.Installer/Checks/ClaudeAuthCheck.cs
@@ -0,0 +1,72 @@
+using System.Text.Json;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Checks;
+
+///
+/// Checks login via `claude auth status --json` — never sends a prompt (costs tokens, can hang
+/// on a usage-limited account). See docs/explore-notes/installer-preflight.md §4.
+///
+public sealed class ClaudeAuthCheck : IEnvironmentCheck
+{
+ public const string CheckId = "claude-auth";
+
+ private readonly ClaudeCliLookup _lookup;
+
+ public ClaudeAuthCheck(ClaudeCliLookup lookup)
+ {
+ _lookup = lookup;
+ }
+
+ public string Id => CheckId;
+ public CheckSeverity Severity => CheckSeverity.Error;
+
+ public async Task RunAsync(InstallContext ctx, CancellationToken ct)
+ {
+ var lookup = await _lookup.ResolveAsync(ctx, ct);
+ if (lookup.Resolved is null)
+ {
+ return CheckResult.Unknown(Id, Severity, "checks.claudeAuth.title",
+ "The claude CLI was not found — login could not be checked.");
+ }
+
+ var (fileName, arguments) = ProcessCommand.For(lookup.Resolved, "auth", "status", "--json");
+ var (exitCode, output) = await _lookup.ProcessRunner.RunAsync(fileName, arguments, null, ct);
+
+ if (exitCode != 0)
+ {
+ return CheckResult.Unknown(Id, Severity, "checks.claudeAuth.title",
+ "Login status could not be determined.", output);
+ }
+
+ var loggedIn = TryParseLoggedIn(output);
+ if (loggedIn is null)
+ {
+ return CheckResult.Unknown(Id, Severity, "checks.claudeAuth.title",
+ "Login status could not be determined.", output);
+ }
+
+ return loggedIn.Value
+ ? CheckResult.Ok(Id, Severity, "checks.claudeAuth.title", "Logged in.")
+ : CheckResult.Fail(Id, Severity, "checks.claudeAuth.title", "Not logged in.", "checks.claudeAuth.hint");
+ }
+
+ private static bool? TryParseLoggedIn(string output)
+ {
+ try
+ {
+ using var doc = JsonDocument.Parse(output);
+ if (doc.RootElement.TryGetProperty("loggedIn", out var prop) &&
+ prop.ValueKind is JsonValueKind.True or JsonValueKind.False)
+ {
+ return prop.GetBoolean();
+ }
+ }
+ catch (JsonException)
+ {
+ // fall through to null — treated as Unknown
+ }
+
+ return null;
+ }
+}
diff --git a/src/ClaudeDo.Installer/Checks/ClaudeCliCheck.cs b/src/ClaudeDo.Installer/Checks/ClaudeCliCheck.cs
new file mode 100644
index 00000000..9ba8f5a8
--- /dev/null
+++ b/src/ClaudeDo.Installer/Checks/ClaudeCliCheck.cs
@@ -0,0 +1,54 @@
+using System.IO;
+using ClaudeDo.Data.Environment;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Checks;
+
+/// Without the claude CLI, no task can ever run — blocking.
+public sealed class ClaudeCliCheck : IEnvironmentCheck
+{
+ public const string CheckId = "claude-cli";
+
+ private readonly ClaudeCliLookup _lookup;
+
+ public ClaudeCliCheck(ClaudeCliLookup lookup)
+ {
+ _lookup = lookup;
+ }
+
+ public string Id => CheckId;
+ public CheckSeverity Severity => CheckSeverity.Error;
+
+ public async Task RunAsync(InstallContext ctx, CancellationToken ct)
+ {
+ var lookup = await _lookup.ResolveAsync(ctx, ct);
+
+ if (lookup.Resolved is null)
+ {
+ var searched = string.Join(", ", SearchedLocations());
+ return CheckResult.Fail(Id, Severity, "checks.claudeCli.title",
+ $"'{ctx.ClaudeBin}' was not found on PATH. Searched: {searched}.",
+ "checks.claudeCli.hint");
+ }
+
+ if (lookup.ExitCode != 0)
+ {
+ return CheckResult.Fail(Id, Severity, "checks.claudeCli.title",
+ $"'{lookup.Resolved.Path}' exited with code {lookup.ExitCode}.",
+ "checks.claudeCli.hint", detail: lookup.Output);
+ }
+
+ var version = lookup.ParsedVersion?.ToString() ?? lookup.Output.Trim();
+ var detail = lookup.Resolved.IsShim
+ ? "Resolved via a shim (.cmd/.bat/.ps1), not a native .exe."
+ : null;
+ return CheckResult.Ok(Id, Severity, "checks.claudeCli.title", $"{lookup.Resolved.Path} — {version}", detail);
+ }
+
+ private IEnumerable SearchedLocations()
+ {
+ var pathVar = _lookup.PathOverride ?? System.Environment.GetEnvironmentVariable("PATH") ?? "";
+ var pathEntries = pathVar.Split(Path.PathSeparator, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+ return pathEntries.Concat(ExecutableResolver.FallbackDirectories());
+ }
+}
diff --git a/src/ClaudeDo.Installer/Checks/ClaudeCliLookup.cs b/src/ClaudeDo.Installer/Checks/ClaudeCliLookup.cs
new file mode 100644
index 00000000..801027f8
--- /dev/null
+++ b/src/ClaudeDo.Installer/Checks/ClaudeCliLookup.cs
@@ -0,0 +1,71 @@
+using System.Text.RegularExpressions;
+using ClaudeDo.Data.Environment;
+using ClaudeDo.Installer.Core;
+using ClaudeDo.Installer.Core.Interfaces;
+
+namespace ClaudeDo.Installer.Checks;
+
+public sealed record ClaudeCliLookupResult(
+ ResolvedExecutable? Resolved,
+ int ExitCode,
+ string Output,
+ Version? ParsedVersion);
+
+///
+/// Resolves the claude CLI and runs `--version` at most once per install run, shared across
+/// ClaudeCliCheck, ClaudeVersionCheck, ClaudeAuthCheck, and PermissionModeAutoCheck.
+///
+public sealed class ClaudeCliLookup
+{
+ private static readonly Regex VersionPattern = new(@"\d+(\.\d+){1,3}", RegexOptions.Compiled);
+
+ private readonly SemaphoreSlim _gate = new(1, 1);
+ private ClaudeCliLookupResult? _cached;
+
+ public ClaudeCliLookup(IProcessRunner processRunner, string? pathOverride = null, string? pathExtOverride = null)
+ {
+ ProcessRunner = processRunner;
+ PathOverride = pathOverride;
+ PathExtOverride = pathExtOverride;
+ }
+
+ public IProcessRunner ProcessRunner { get; }
+ public string? PathOverride { get; }
+ public string? PathExtOverride { get; }
+
+ public async Task ResolveAsync(InstallContext ctx, CancellationToken ct)
+ {
+ if (_cached is not null) return _cached;
+
+ await _gate.WaitAsync(ct);
+ try
+ {
+ _cached ??= await ResolveCoreAsync(ctx, ct);
+ return _cached;
+ }
+ finally
+ {
+ _gate.Release();
+ }
+ }
+
+ private async Task ResolveCoreAsync(InstallContext ctx, CancellationToken ct)
+ {
+ var resolved = ExecutableResolver.Resolve(ctx.ClaudeBin, PathOverride, PathExtOverride);
+ if (resolved is null)
+ {
+ return new ClaudeCliLookupResult(null, ExitCode: -1, Output: string.Empty, ParsedVersion: null);
+ }
+
+ var (fileName, arguments) = ProcessCommand.For(resolved, "--version");
+ var (exitCode, output) = await ProcessRunner.RunAsync(fileName, arguments, null, ct);
+ var parsedVersion = exitCode == 0 ? ParseVersion(output) : null;
+
+ return new ClaudeCliLookupResult(resolved, exitCode, output, parsedVersion);
+ }
+
+ private static Version? ParseVersion(string output) =>
+ VersionPattern.Match(output) is { Success: true } match && Version.TryParse(match.Value, out var version)
+ ? version
+ : null;
+}
diff --git a/src/ClaudeDo.Installer/Checks/ClaudeVersionCheck.cs b/src/ClaudeDo.Installer/Checks/ClaudeVersionCheck.cs
new file mode 100644
index 00000000..1d595dc8
--- /dev/null
+++ b/src/ClaudeDo.Installer/Checks/ClaudeVersionCheck.cs
@@ -0,0 +1,54 @@
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Checks;
+
+/// Gates the CLI flags ClaudeArgsBuilder relies on — blocking.
+public sealed class ClaudeVersionCheck : IEnvironmentCheck
+{
+ public const string CheckId = "claude-version";
+
+ ///
+ /// Newest version confirmed to work end-to-end with every flag ClaudeDo uses (--permission-mode
+ /// auto, --effort, --agents, --json-schema, --append-system-prompt, --output-format stream-json
+ /// --verbose, --resume, mcp add --transport http --scope user). A verified floor, not a proven
+ /// theoretical minimum — see docs/explore-notes/installer-preflight.md §3.
+ ///
+ public static readonly Version MinimumVersion = new(2, 1, 220);
+
+ private readonly ClaudeCliLookup _lookup;
+
+ public ClaudeVersionCheck(ClaudeCliLookup lookup)
+ {
+ _lookup = lookup;
+ }
+
+ public string Id => CheckId;
+ public CheckSeverity Severity => CheckSeverity.Error;
+
+ public async Task RunAsync(InstallContext ctx, CancellationToken ct)
+ {
+ var lookup = await _lookup.ResolveAsync(ctx, ct);
+
+ if (lookup.Resolved is null)
+ {
+ return CheckResult.Unknown(Id, Severity, "checks.claudeVersion.title",
+ "The claude CLI was not found — version could not be checked.");
+ }
+
+ if (lookup.ExitCode != 0 || lookup.ParsedVersion is null)
+ {
+ return CheckResult.Unknown(Id, Severity, "checks.claudeVersion.title",
+ $"Could not parse a version from '{lookup.Output.Trim()}'.");
+ }
+
+ if (lookup.ParsedVersion < MinimumVersion)
+ {
+ return CheckResult.Fail(Id, Severity, "checks.claudeVersion.title",
+ $"claude {lookup.ParsedVersion} is older than the required {MinimumVersion}.",
+ "checks.claudeVersion.hint");
+ }
+
+ return CheckResult.Ok(Id, Severity, "checks.claudeVersion.title",
+ $"claude {lookup.ParsedVersion} meets the minimum ({MinimumVersion}).");
+ }
+}
diff --git a/src/ClaudeDo.Installer/Checks/PermissionModeAutoCheck.cs b/src/ClaudeDo.Installer/Checks/PermissionModeAutoCheck.cs
new file mode 100644
index 00000000..72f2d5e7
--- /dev/null
+++ b/src/ClaudeDo.Installer/Checks/PermissionModeAutoCheck.cs
@@ -0,0 +1,66 @@
+using System.Text.RegularExpressions;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Checks;
+
+///
+/// Static-only check per docs/explore-notes/installer-preflight.md §2: real auto-mode eligibility
+/// (org/model/plan) has no cheap detectable signal, so this only confirms the CLI's argument
+/// parser still recognizes "auto" as a --permission-mode choice. A warning, not a blocker — a
+/// too-old CLI just degrades to acceptEdits/default with more prompts.
+///
+public sealed class PermissionModeAutoCheck : IEnvironmentCheck
+{
+ public const string CheckId = "claude-permission-mode-auto";
+
+ private static readonly Regex AutoWord = new(@"\bauto\b", RegexOptions.Compiled);
+ private const int SearchWindow = 300;
+
+ private readonly ClaudeCliLookup _lookup;
+
+ public PermissionModeAutoCheck(ClaudeCliLookup lookup)
+ {
+ _lookup = lookup;
+ }
+
+ public string Id => CheckId;
+ public CheckSeverity Severity => CheckSeverity.Warning;
+
+ public async Task RunAsync(InstallContext ctx, CancellationToken ct)
+ {
+ var lookup = await _lookup.ResolveAsync(ctx, ct);
+ if (lookup.Resolved is null)
+ {
+ return CheckResult.Unknown(Id, Severity, "checks.permissionModeAuto.title",
+ "The claude CLI was not found — permission-mode support could not be checked.");
+ }
+
+ var (fileName, arguments) = ProcessCommand.For(lookup.Resolved, "--help");
+ var (exitCode, output) = await _lookup.ProcessRunner.RunAsync(fileName, arguments, null, ct);
+
+ if (exitCode != 0 || string.IsNullOrWhiteSpace(output))
+ {
+ return CheckResult.Unknown(Id, Severity, "checks.permissionModeAuto.title",
+ "Could not determine whether --permission-mode auto is supported.");
+ }
+
+ if (AutoIsListed(output))
+ {
+ return CheckResult.Ok(Id, Severity, "checks.permissionModeAuto.title",
+ "--permission-mode auto is recognized by this CLI.");
+ }
+
+ return CheckResult.Fail(Id, Severity, "checks.permissionModeAuto.title",
+ "This claude CLI version does not list 'auto' as a --permission-mode choice.",
+ "checks.permissionModeAuto.hint");
+ }
+
+ private static bool AutoIsListed(string helpOutput)
+ {
+ var index = helpOutput.IndexOf("--permission-mode", StringComparison.Ordinal);
+ if (index < 0) return false;
+
+ var windowEnd = Math.Min(helpOutput.Length, index + SearchWindow);
+ return AutoWord.IsMatch(helpOutput[index..windowEnd]);
+ }
+}
diff --git a/src/ClaudeDo.Localization/locales/de.json b/src/ClaudeDo.Localization/locales/de.json
index c64d31d5..8d4942c7 100644
--- a/src/ClaudeDo.Localization/locales/de.json
+++ b/src/ClaudeDo.Localization/locales/de.json
@@ -653,6 +653,22 @@
"writeAccess": {
"title": "Schreibzugriff",
"hint": "Wähle ein anderes Installationsverzeichnis oder starte den Installer mit ausreichenden Rechten (z. B. als Administrator)."
+ },
+ "claudeCli": {
+ "title": "Claude CLI",
+ "hint": "Installiere die Claude CLI (npm install -g @anthropic-ai/claude-code) und starte danach dein Terminal/deine Anmeldesitzung neu, damit der aktualisierte PATH greift."
+ },
+ "claudeVersion": {
+ "title": "Claude-CLI-Version",
+ "hint": "Aktualisiere die CLI: npm update -g @anthropic-ai/claude-code"
+ },
+ "claudeAuth": {
+ "title": "Claude-CLI-Login",
+ "hint": "Starte 'claude' einmal und schließe den Login-Vorgang ab."
+ },
+ "permissionModeAuto": {
+ "title": "Unterstützung für --permission-mode auto",
+ "hint": "Aktualisiere die CLI: npm update -g @anthropic-ai/claude-code. ClaudeDo funktioniert auch im Modus acceptEdits/default, dann mit mehr Rückfragen."
}
}
}
diff --git a/src/ClaudeDo.Localization/locales/en.json b/src/ClaudeDo.Localization/locales/en.json
index f7cd8b65..1814b8cc 100644
--- a/src/ClaudeDo.Localization/locales/en.json
+++ b/src/ClaudeDo.Localization/locales/en.json
@@ -653,6 +653,22 @@
"writeAccess": {
"title": "Write access",
"hint": "Choose a different install directory, or run the installer with sufficient permissions (e.g. as administrator)."
+ },
+ "claudeCli": {
+ "title": "Claude CLI",
+ "hint": "Install the Claude CLI (npm install -g @anthropic-ai/claude-code), then restart your terminal/login session so the updated PATH takes effect."
+ },
+ "claudeVersion": {
+ "title": "Claude CLI version",
+ "hint": "Update the CLI: npm update -g @anthropic-ai/claude-code"
+ },
+ "claudeAuth": {
+ "title": "Claude CLI login",
+ "hint": "Run 'claude' once and complete the login flow."
+ },
+ "permissionModeAuto": {
+ "title": "--permission-mode auto support",
+ "hint": "Update the CLI: npm update -g @anthropic-ai/claude-code. ClaudeDo still works in acceptEdits/default mode, with more prompts."
}
}
}
diff --git a/tests/ClaudeDo.Installer.Tests/Checks/ClaudeAuthCheckTests.cs b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeAuthCheckTests.cs
new file mode 100644
index 00000000..6061388e
--- /dev/null
+++ b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeAuthCheckTests.cs
@@ -0,0 +1,88 @@
+using ClaudeDo.Installer.Checks;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Tests.Checks;
+
+public sealed class ClaudeAuthCheckTests : IDisposable
+{
+ private readonly string _dir;
+
+ public ClaudeAuthCheckTests()
+ {
+ _dir = Path.Combine(Path.GetTempPath(), $"cdclaudeauth_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(_dir);
+ File.WriteAllText(Path.Combine(_dir, "claude.exe"), "");
+ }
+
+ public void Dispose()
+ {
+ try { Directory.Delete(_dir, recursive: true); } catch { }
+ }
+
+ private ClaudeCliLookup MakeLookup(FakeProcessRunner runner) =>
+ new(runner, pathOverride: _dir, pathExtOverride: ".exe");
+
+ [Fact]
+ public async Task Logged_in_reports_ok_without_sending_a_prompt()
+ {
+ var runner = new FakeProcessRunner(
+ (0, "2.1.230 (Claude Code)"),
+ (0, "{\"loggedIn\":true,\"authMethod\":\"claude.ai\"}"));
+ var check = new ClaudeAuthCheck(MakeLookup(runner));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Ok, result.Status);
+ Assert.All(runner.Calls, call => Assert.DoesNotContain("-p ", call.Arguments));
+ Assert.Contains(runner.Calls, call => call.Arguments.Contains("auth") && call.Arguments.Contains("status"));
+ }
+
+ [Fact]
+ public async Task Logged_out_reports_failed()
+ {
+ var runner = new FakeProcessRunner(
+ (0, "2.1.230 (Claude Code)"),
+ (0, "{\"loggedIn\":false}"));
+ var check = new ClaudeAuthCheck(MakeLookup(runner));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Failed, result.Status);
+ Assert.NotNull(result.HintKey);
+ }
+
+ [Fact]
+ public async Task Unparseable_output_reports_unknown_not_failed()
+ {
+ var runner = new FakeProcessRunner(
+ (0, "2.1.230 (Claude Code)"),
+ (0, "not json"));
+ var check = new ClaudeAuthCheck(MakeLookup(runner));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Unknown, result.Status);
+ }
+
+ [Fact]
+ public async Task Cli_missing_reports_unknown()
+ {
+ var emptyDir = Path.Combine(Path.GetTempPath(), $"cdclaudeauth_empty_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(emptyDir);
+ try
+ {
+ var runner = new FakeProcessRunner();
+ var check = new ClaudeAuthCheck(new ClaudeCliLookup(runner, pathOverride: emptyDir, pathExtOverride: ".exe"));
+ var ctx = new InstallContext { ClaudeBin = "claudedo_totally_missing_cmd_9f3a1" };
+
+ var result = await check.RunAsync(ctx, CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Unknown, result.Status);
+ Assert.Empty(runner.Calls);
+ }
+ finally
+ {
+ Directory.Delete(emptyDir, recursive: true);
+ }
+ }
+}
diff --git a/tests/ClaudeDo.Installer.Tests/Checks/ClaudeCliCheckTests.cs b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeCliCheckTests.cs
new file mode 100644
index 00000000..da89313e
--- /dev/null
+++ b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeCliCheckTests.cs
@@ -0,0 +1,79 @@
+using ClaudeDo.Installer.Checks;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Tests.Checks;
+
+public sealed class ClaudeCliCheckTests : IDisposable
+{
+ private readonly string _dir;
+
+ public ClaudeCliCheckTests()
+ {
+ _dir = Path.Combine(Path.GetTempPath(), $"cdclaudecli_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(_dir);
+ }
+
+ public void Dispose()
+ {
+ try { Directory.Delete(_dir, recursive: true); } catch { }
+ }
+
+ [Fact]
+ public async Task Found_as_exe_reports_ok_with_path_and_version_and_no_shim_detail()
+ {
+ File.WriteAllText(Path.Combine(_dir, "claude.exe"), "");
+ var runner = new FakeProcessRunner((0, "2.1.230 (Claude Code)"));
+ var check = new ClaudeCliCheck(new ClaudeCliLookup(runner, pathOverride: _dir, pathExtOverride: ".exe"));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Ok, result.Status);
+ Assert.Contains(_dir, result.Message);
+ Assert.Contains("2.1.230", result.Message);
+ Assert.Null(result.Detail);
+ }
+
+ [Fact]
+ public async Task Found_as_shim_flags_it_in_detail()
+ {
+ File.WriteAllText(Path.Combine(_dir, "claude.cmd"), "");
+ var runner = new FakeProcessRunner((0, "2.1.230 (Claude Code)"));
+ var check = new ClaudeCliCheck(new ClaudeCliLookup(runner, pathOverride: _dir, pathExtOverride: ".cmd"));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Ok, result.Status);
+ Assert.NotNull(result.Detail);
+ }
+
+ [Fact]
+ public async Task Not_found_reports_failed_naming_searched_locations()
+ {
+ var runner = new FakeProcessRunner();
+ var check = new ClaudeCliCheck(new ClaudeCliLookup(runner, pathOverride: _dir, pathExtOverride: ".exe"));
+ // A distinctive, definitely-missing name — a plain "claude" would still resolve via
+ // ExecutableResolver's fixed fallback dirs (e.g. %USERPROFILE%\.local\bin) on a machine
+ // that has the real CLI installed, regardless of pathOverride.
+ var ctx = new InstallContext { ClaudeBin = "claudedo_totally_missing_cmd_9f3a1" };
+
+ var result = await check.RunAsync(ctx, CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Failed, result.Status);
+ Assert.Equal(CheckSeverity.Error, result.Severity);
+ Assert.Contains(_dir, result.Message);
+ Assert.NotNull(result.HintKey);
+ Assert.Empty(runner.Calls);
+ }
+
+ [Fact]
+ public async Task Nonzero_exit_reports_failed()
+ {
+ File.WriteAllText(Path.Combine(_dir, "claude.exe"), "");
+ var runner = new FakeProcessRunner((1, "some error"));
+ var check = new ClaudeCliCheck(new ClaudeCliLookup(runner, pathOverride: _dir, pathExtOverride: ".exe"));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Failed, result.Status);
+ }
+}
diff --git a/tests/ClaudeDo.Installer.Tests/Checks/ClaudeCliLookupTests.cs b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeCliLookupTests.cs
new file mode 100644
index 00000000..a062dd9f
--- /dev/null
+++ b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeCliLookupTests.cs
@@ -0,0 +1,84 @@
+using ClaudeDo.Installer.Checks;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Tests.Checks;
+
+public sealed class ClaudeCliLookupTests : IDisposable
+{
+ private readonly string _dir;
+
+ public ClaudeCliLookupTests()
+ {
+ _dir = Path.Combine(Path.GetTempPath(), $"cdclaudelookup_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(_dir);
+ File.WriteAllText(Path.Combine(_dir, "claude.exe"), "");
+ }
+
+ public void Dispose()
+ {
+ try { Directory.Delete(_dir, recursive: true); } catch { }
+ }
+
+ [Fact]
+ public async Task Version_is_executed_only_once_across_repeated_calls()
+ {
+ var runner = new FakeProcessRunner((0, "2.1.230 (Claude Code)"));
+ var lookup = new ClaudeCliLookup(runner, pathOverride: _dir, pathExtOverride: ".exe");
+
+ await lookup.ResolveAsync(new InstallContext(), CancellationToken.None);
+ await lookup.ResolveAsync(new InstallContext(), CancellationToken.None);
+ await lookup.ResolveAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Single(runner.Calls);
+ }
+
+ [Fact]
+ public async Task Concurrent_calls_still_run_version_only_once()
+ {
+ var runner = new FakeProcessRunner((0, "2.1.230 (Claude Code)"));
+ var lookup = new ClaudeCliLookup(runner, pathOverride: _dir, pathExtOverride: ".exe");
+
+ await Task.WhenAll(Enumerable.Range(0, 8)
+ .Select(_ => lookup.ResolveAsync(new InstallContext(), CancellationToken.None)));
+
+ Assert.Single(runner.Calls);
+ }
+
+ [Fact]
+ public async Task Version_is_executed_only_once_when_shared_across_all_four_checks()
+ {
+ var runner = new FakeProcessRunner((0, "2.1.230 (Claude Code)"));
+ var lookup = new ClaudeCliLookup(runner, pathOverride: _dir, pathExtOverride: ".exe");
+ var ctx = new InstallContext();
+
+ await new ClaudeCliCheck(lookup).RunAsync(ctx, CancellationToken.None);
+ await new ClaudeVersionCheck(lookup).RunAsync(ctx, CancellationToken.None);
+ await new ClaudeAuthCheck(lookup).RunAsync(ctx, CancellationToken.None);
+ await new PermissionModeAutoCheck(lookup).RunAsync(ctx, CancellationToken.None);
+
+ var versionCalls = runner.Calls.Count(c => c.Arguments.Contains("--version"));
+ Assert.Equal(1, versionCalls);
+ }
+
+ [Fact]
+ public async Task Cli_not_found_returns_null_resolved_without_running_a_process()
+ {
+ var emptyDir = Path.Combine(Path.GetTempPath(), $"cdclaudelookup_empty_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(emptyDir);
+ try
+ {
+ var runner = new FakeProcessRunner();
+ var lookup = new ClaudeCliLookup(runner, pathOverride: emptyDir, pathExtOverride: ".exe");
+ var ctx = new InstallContext { ClaudeBin = "claudedo_totally_missing_cmd_9f3a1" };
+
+ var result = await lookup.ResolveAsync(ctx, CancellationToken.None);
+
+ Assert.Null(result.Resolved);
+ Assert.Empty(runner.Calls);
+ }
+ finally
+ {
+ Directory.Delete(emptyDir, recursive: true);
+ }
+ }
+}
diff --git a/tests/ClaudeDo.Installer.Tests/Checks/ClaudeVersionCheckTests.cs b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeVersionCheckTests.cs
new file mode 100644
index 00000000..c21d7fcd
--- /dev/null
+++ b/tests/ClaudeDo.Installer.Tests/Checks/ClaudeVersionCheckTests.cs
@@ -0,0 +1,69 @@
+using ClaudeDo.Installer.Checks;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Tests.Checks;
+
+public sealed class ClaudeVersionCheckTests : IDisposable
+{
+ private readonly string _dir;
+
+ public ClaudeVersionCheckTests()
+ {
+ _dir = Path.Combine(Path.GetTempPath(), $"cdclaudeversion_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(_dir);
+ File.WriteAllText(Path.Combine(_dir, "claude.exe"), "");
+ }
+
+ public void Dispose()
+ {
+ try { Directory.Delete(_dir, recursive: true); } catch { }
+ }
+
+ private ClaudeCliLookup MakeLookup(FakeProcessRunner runner) =>
+ new(runner, pathOverride: _dir, pathExtOverride: ".exe");
+
+ [Theory]
+ [InlineData("2.1.220 (Claude Code)", CheckStatus.Ok)] // exactly at the floor
+ [InlineData("2.1.219 (Claude Code)", CheckStatus.Failed)] // one patch below the floor
+ [InlineData("2.1.191", CheckStatus.Failed)]
+ [InlineData("v2.1.191", CheckStatus.Failed)]
+ [InlineData("2.10.0", CheckStatus.Ok)] // minor 10 > minor 1, not a lexical trap
+ [InlineData("garbage output, no version here", CheckStatus.Unknown)]
+ public async Task Version_parsing_and_gate(string versionOutput, CheckStatus expected)
+ {
+ var runner = new FakeProcessRunner((0, versionOutput));
+ var check = new ClaudeVersionCheck(MakeLookup(runner));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(expected, result.Status);
+ }
+
+ [Fact]
+ public void Minor_version_compares_numerically_not_lexically()
+ {
+ Assert.True(new Version(2, 10, 0) > new Version(2, 9, 0));
+ }
+
+ [Fact]
+ public async Task Cli_not_found_reports_unknown_not_failed()
+ {
+ var emptyDir = Path.Combine(Path.GetTempPath(), $"cdclaudeversion_empty_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(emptyDir);
+ try
+ {
+ var runner = new FakeProcessRunner();
+ var check = new ClaudeVersionCheck(new ClaudeCliLookup(runner, pathOverride: emptyDir, pathExtOverride: ".exe"));
+ var ctx = new InstallContext { ClaudeBin = "claudedo_totally_missing_cmd_9f3a1" };
+
+ var result = await check.RunAsync(ctx, CancellationToken.None);
+ Assert.Empty(runner.Calls);
+
+ Assert.Equal(CheckStatus.Unknown, result.Status);
+ }
+ finally
+ {
+ Directory.Delete(emptyDir, recursive: true);
+ }
+ }
+}
diff --git a/tests/ClaudeDo.Installer.Tests/Checks/PermissionModeAutoCheckTests.cs b/tests/ClaudeDo.Installer.Tests/Checks/PermissionModeAutoCheckTests.cs
new file mode 100644
index 00000000..7894f955
--- /dev/null
+++ b/tests/ClaudeDo.Installer.Tests/Checks/PermissionModeAutoCheckTests.cs
@@ -0,0 +1,88 @@
+using ClaudeDo.Installer.Checks;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Tests.Checks;
+
+public sealed class PermissionModeAutoCheckTests : IDisposable
+{
+ private readonly string _dir;
+
+ private const string HelpWithAuto =
+ "Options:\n --permission-mode Permission mode (choices: \"acceptEdits\", \"auto\", \"bypassPermissions\", \"manual\", \"dontAsk\", \"plan\")\n";
+
+ private const string HelpWithoutAuto =
+ "Options:\n --permission-mode Permission mode (choices: \"acceptEdits\", \"bypassPermissions\", \"manual\")\n";
+
+ public PermissionModeAutoCheckTests()
+ {
+ _dir = Path.Combine(Path.GetTempPath(), $"cdpermmode_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(_dir);
+ File.WriteAllText(Path.Combine(_dir, "claude.exe"), "");
+ }
+
+ public void Dispose()
+ {
+ try { Directory.Delete(_dir, recursive: true); } catch { }
+ }
+
+ private ClaudeCliLookup MakeLookup(FakeProcessRunner runner) =>
+ new(runner, pathOverride: _dir, pathExtOverride: ".exe");
+
+ [Fact]
+ public async Task Auto_listed_in_help_reports_ok()
+ {
+ var runner = new FakeProcessRunner((0, "2.1.230"), (0, HelpWithAuto));
+ var check = new PermissionModeAutoCheck(MakeLookup(runner));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Ok, result.Status);
+ Assert.Equal(CheckSeverity.Warning, result.Severity);
+ }
+
+ [Fact]
+ public async Task Auto_missing_from_help_reports_failed_with_hint()
+ {
+ var runner = new FakeProcessRunner((0, "2.1.230"), (0, HelpWithoutAuto));
+ var check = new PermissionModeAutoCheck(MakeLookup(runner));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Failed, result.Status);
+ Assert.Equal(CheckSeverity.Warning, result.Severity);
+ Assert.NotNull(result.HintKey);
+ }
+
+ [Fact]
+ public async Task Help_not_determinable_reports_unknown()
+ {
+ var runner = new FakeProcessRunner((0, "2.1.230"), (1, ""));
+ var check = new PermissionModeAutoCheck(MakeLookup(runner));
+
+ var result = await check.RunAsync(new InstallContext(), CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Unknown, result.Status);
+ }
+
+ [Fact]
+ public async Task Cli_missing_reports_unknown()
+ {
+ var emptyDir = Path.Combine(Path.GetTempPath(), $"cdpermmode_empty_{Guid.NewGuid():N}");
+ Directory.CreateDirectory(emptyDir);
+ try
+ {
+ var runner = new FakeProcessRunner();
+ var check = new PermissionModeAutoCheck(new ClaudeCliLookup(runner, pathOverride: emptyDir, pathExtOverride: ".exe"));
+ var ctx = new InstallContext { ClaudeBin = "claudedo_totally_missing_cmd_9f3a1" };
+
+ var result = await check.RunAsync(ctx, CancellationToken.None);
+
+ Assert.Equal(CheckStatus.Unknown, result.Status);
+ Assert.Empty(runner.Calls);
+ }
+ finally
+ {
+ Directory.Delete(emptyDir, recursive: true);
+ }
+ }
+}