1package config
  2
  3import (
  4	"cmp"
  5	"context"
  6	"encoding/json"
  7	"fmt"
  8	"log/slog"
  9	"maps"
 10	"os"
 11	"os/exec"
 12	"path/filepath"
 13	"runtime"
 14	"slices"
 15	"strconv"
 16	"strings"
 17	"testing"
 18
 19	"charm.land/catwalk/pkg/catwalk"
 20	"git.secluded.site/crush/internal/agent/hyper"
 21	"git.secluded.site/crush/internal/csync"
 22	"git.secluded.site/crush/internal/env"
 23	"git.secluded.site/crush/internal/fsext"
 24	"git.secluded.site/crush/internal/home"
 25	"git.secluded.site/crush/internal/log"
 26	powernapConfig "github.com/charmbracelet/x/powernap/pkg/config"
 27	"github.com/qjebbs/go-jsons"
 28)
 29
 30const defaultCatwalkURL = "https://catwalk.charm.sh"
 31
 32// Load loads the configuration from the default paths.
 33func Load(workingDir, dataDir string, debug bool) (*Config, error) {
 34	configPaths := lookupConfigs(workingDir)
 35
 36	cfg, err := loadFromConfigPaths(configPaths)
 37	if err != nil {
 38		return nil, fmt.Errorf("failed to load config from paths %v: %w", configPaths, err)
 39	}
 40
 41	cfg.dataConfigDir = GlobalConfigData()
 42
 43	cfg.setDefaults(workingDir, dataDir)
 44
 45	if debug {
 46		cfg.Options.Debug = true
 47	}
 48
 49	// Setup logs
 50	log.Setup(
 51		filepath.Join(cfg.Options.DataDirectory, "logs", fmt.Sprintf("%s.log", appName)),
 52		cfg.Options.Debug,
 53	)
 54
 55	if !isInsideWorktree() {
 56		const depth = 2
 57		const items = 100
 58		slog.Warn("No git repository detected in working directory, will limit file walk operations", "depth", depth, "items", items)
 59		assignIfNil(&cfg.Tools.Ls.MaxDepth, depth)
 60		assignIfNil(&cfg.Tools.Ls.MaxItems, items)
 61		assignIfNil(&cfg.Options.TUI.Completions.MaxDepth, depth)
 62		assignIfNil(&cfg.Options.TUI.Completions.MaxItems, items)
 63	}
 64
 65	// Load known providers, this loads the config from catwalk
 66	providers, err := Providers(cfg)
 67	if err != nil {
 68		return nil, err
 69	}
 70	cfg.knownProviders = providers
 71
 72	env := env.New()
 73	// Configure providers
 74	valueResolver := NewShellVariableResolver(env)
 75	cfg.resolver = valueResolver
 76	if err := cfg.configureProviders(env, valueResolver, cfg.knownProviders); err != nil {
 77		return nil, fmt.Errorf("failed to configure providers: %w", err)
 78	}
 79
 80	if !cfg.IsConfigured() {
 81		slog.Warn("No providers configured")
 82		return cfg, nil
 83	}
 84
 85	if err := cfg.configureSelectedModels(cfg.knownProviders); err != nil {
 86		return nil, fmt.Errorf("failed to configure selected models: %w", err)
 87	}
 88	cfg.SetupAgents()
 89	return cfg, nil
 90}
 91
 92func PushPopCrushEnv() func() {
 93	found := []string{}
 94	for _, ev := range os.Environ() {
 95		if strings.HasPrefix(ev, "CRUSH_") {
 96			pair := strings.SplitN(ev, "=", 2)
 97			if len(pair) != 2 {
 98				continue
 99			}
100			found = append(found, strings.TrimPrefix(pair[0], "CRUSH_"))
101		}
102	}
103	backups := make(map[string]string)
104	for _, ev := range found {
105		backups[ev] = os.Getenv(ev)
106	}
107
108	for _, ev := range found {
109		os.Setenv(ev, os.Getenv("CRUSH_"+ev))
110	}
111
112	restore := func() {
113		for k, v := range backups {
114			os.Setenv(k, v)
115		}
116	}
117	return restore
118}
119
120func (c *Config) configureProviders(env env.Env, resolver VariableResolver, knownProviders []catwalk.Provider) error {
121	knownProviderNames := make(map[string]bool)
122	restore := PushPopCrushEnv()
123	defer restore()
124
125	// When disable_default_providers is enabled, skip all default/embedded
126	// providers entirely. Users must fully specify any providers they want.
127	// We skip to the custom provider validation loop which handles all
128	// user-configured providers uniformly.
129	if c.Options.DisableDefaultProviders {
130		knownProviders = nil
131	}
132
133	for _, p := range knownProviders {
134		knownProviderNames[string(p.ID)] = true
135		config, configExists := c.Providers.Get(string(p.ID))
136		// if the user configured a known provider we need to allow it to override a couple of parameters
137		if configExists {
138			if config.BaseURL != "" {
139				p.APIEndpoint = config.BaseURL
140			}
141			if config.APIKey != "" {
142				p.APIKey = config.APIKey
143			}
144			if len(config.Models) > 0 {
145				models := []catwalk.Model{}
146				seen := make(map[string]bool)
147
148				for _, model := range config.Models {
149					if seen[model.ID] {
150						continue
151					}
152					seen[model.ID] = true
153					if model.Name == "" {
154						model.Name = model.ID
155					}
156					models = append(models, model)
157				}
158				for _, model := range p.Models {
159					if seen[model.ID] {
160						continue
161					}
162					seen[model.ID] = true
163					if model.Name == "" {
164						model.Name = model.ID
165					}
166					models = append(models, model)
167				}
168
169				p.Models = models
170			}
171		}
172
173		headers := map[string]string{}
174		if len(p.DefaultHeaders) > 0 {
175			maps.Copy(headers, p.DefaultHeaders)
176		}
177		if len(config.ExtraHeaders) > 0 {
178			maps.Copy(headers, config.ExtraHeaders)
179		}
180		for k, v := range headers {
181			resolved, err := resolver.ResolveValue(v)
182			if err != nil {
183				slog.Error("Could not resolve provider header", "err", err.Error())
184				continue
185			}
186			headers[k] = resolved
187		}
188		prepared := ProviderConfig{
189			ID:                 string(p.ID),
190			Name:               p.Name,
191			BaseURL:            p.APIEndpoint,
192			APIKey:             p.APIKey,
193			APIKeyTemplate:     p.APIKey, // Store original template for re-resolution
194			OAuthToken:         config.OAuthToken,
195			Type:               p.Type,
196			Disable:            config.Disable,
197			SystemPromptPrefix: config.SystemPromptPrefix,
198			ExtraHeaders:       headers,
199			ExtraBody:          config.ExtraBody,
200			ExtraParams:        make(map[string]string),
201			Models:             p.Models,
202		}
203
204		switch {
205		case p.ID == catwalk.InferenceProviderAnthropic && config.OAuthToken != nil:
206			// Claude Code subscription is not supported anymore. Remove to show onboarding.
207			c.RemoveConfigField("providers.anthropic")
208			c.Providers.Del(string(p.ID))
209			continue
210		case p.ID == catwalk.InferenceProviderCopilot && config.OAuthToken != nil:
211			prepared.SetupGitHubCopilot()
212		}
213
214		switch p.ID {
215		// Handle specific providers that require additional configuration
216		case catwalk.InferenceProviderVertexAI:
217			if !hasVertexCredentials(env) {
218				if configExists {
219					slog.Warn("Skipping Vertex AI provider due to missing credentials")
220					c.Providers.Del(string(p.ID))
221				}
222				continue
223			}
224			prepared.ExtraParams["project"] = env.Get("VERTEXAI_PROJECT")
225			prepared.ExtraParams["location"] = env.Get("VERTEXAI_LOCATION")
226		case catwalk.InferenceProviderAzure:
227			endpoint, err := resolver.ResolveValue(p.APIEndpoint)
228			if err != nil || endpoint == "" {
229				if configExists {
230					slog.Warn("Skipping Azure provider due to missing API endpoint", "provider", p.ID, "error", err)
231					c.Providers.Del(string(p.ID))
232				}
233				continue
234			}
235			prepared.BaseURL = endpoint
236			prepared.ExtraParams["apiVersion"] = env.Get("AZURE_OPENAI_API_VERSION")
237		case catwalk.InferenceProviderBedrock:
238			if !hasAWSCredentials(env) {
239				if configExists {
240					slog.Warn("Skipping Bedrock provider due to missing AWS credentials")
241					c.Providers.Del(string(p.ID))
242				}
243				continue
244			}
245			prepared.ExtraParams["region"] = env.Get("AWS_REGION")
246			if prepared.ExtraParams["region"] == "" {
247				prepared.ExtraParams["region"] = env.Get("AWS_DEFAULT_REGION")
248			}
249			for _, model := range p.Models {
250				if !strings.HasPrefix(model.ID, "anthropic.") {
251					return fmt.Errorf("bedrock provider only supports anthropic models for now, found: %s", model.ID)
252				}
253			}
254		default:
255			// if the provider api or endpoint are missing we skip them
256			v, err := resolver.ResolveValue(p.APIKey)
257			if v == "" || err != nil {
258				if configExists {
259					slog.Warn("Skipping provider due to missing API key", "provider", p.ID)
260					c.Providers.Del(string(p.ID))
261				}
262				continue
263			}
264		}
265		c.Providers.Set(string(p.ID), prepared)
266	}
267
268	// validate the custom providers
269	for id, providerConfig := range c.Providers.Seq2() {
270		if knownProviderNames[id] {
271			continue
272		}
273
274		// Make sure the provider ID is set
275		providerConfig.ID = id
276		if providerConfig.Name == "" {
277			providerConfig.Name = id // Use ID as name if not set
278		}
279		// default to OpenAI if not set
280		if providerConfig.Type == "" {
281			providerConfig.Type = catwalk.TypeOpenAICompat
282		}
283		if !slices.Contains(catwalk.KnownProviderTypes(), providerConfig.Type) && providerConfig.Type != hyper.Name {
284			slog.Warn("Skipping custom provider due to unsupported provider type", "provider", id)
285			c.Providers.Del(id)
286			continue
287		}
288
289		if providerConfig.Disable {
290			slog.Debug("Skipping custom provider due to disable flag", "provider", id)
291			c.Providers.Del(id)
292			continue
293		}
294		if providerConfig.APIKey == "" {
295			slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
296		}
297		if providerConfig.BaseURL == "" {
298			slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id)
299			c.Providers.Del(id)
300			continue
301		}
302		if len(providerConfig.Models) == 0 {
303			slog.Warn("Skipping custom provider because the provider has no models", "provider", id)
304			c.Providers.Del(id)
305			continue
306		}
307		apiKey, err := resolver.ResolveValue(providerConfig.APIKey)
308		if apiKey == "" || err != nil {
309			slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
310		}
311		baseURL, err := resolver.ResolveValue(providerConfig.BaseURL)
312		if baseURL == "" || err != nil {
313			slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id, "error", err)
314			c.Providers.Del(id)
315			continue
316		}
317
318		for k, v := range providerConfig.ExtraHeaders {
319			resolved, err := resolver.ResolveValue(v)
320			if err != nil {
321				slog.Error("Could not resolve provider header", "err", err.Error())
322				continue
323			}
324			providerConfig.ExtraHeaders[k] = resolved
325		}
326
327		c.Providers.Set(id, providerConfig)
328	}
329	return nil
330}
331
332func (c *Config) setDefaults(workingDir, dataDir string) {
333	c.workingDir = workingDir
334	if c.Options == nil {
335		c.Options = &Options{}
336	}
337	if c.Options.TUI == nil {
338		c.Options.TUI = &TUIOptions{}
339	}
340	if c.Options.ContextPaths == nil {
341		c.Options.ContextPaths = []string{}
342	}
343	if c.Options.MemoryPaths == nil {
344		crushConfigDir := filepath.Dir(GlobalConfig())
345		c.Options.MemoryPaths = []string{
346			filepath.Join(crushConfigDir, "CRUSH.md"),
347			filepath.Join(filepath.Dir(crushConfigDir), "AGENTS.md"),
348		}
349	}
350	c.Options.ContextPaths = append(c.Options.ContextPaths, c.Options.MemoryPaths...)
351	if c.Options.SkillsPaths == nil {
352		c.Options.SkillsPaths = []string{}
353	}
354	if dataDir != "" {
355		c.Options.DataDirectory = dataDir
356	} else if c.Options.DataDirectory == "" {
357		if path, ok := fsext.LookupClosest(workingDir, defaultDataDirectory); ok {
358			c.Options.DataDirectory = path
359		} else {
360			c.Options.DataDirectory = filepath.Join(workingDir, defaultDataDirectory)
361		}
362	}
363	if c.Providers == nil {
364		c.Providers = csync.NewMap[string, ProviderConfig]()
365	}
366	if c.Models == nil {
367		c.Models = make(map[SelectedModelType]SelectedModel)
368	}
369	if c.RecentModels == nil {
370		c.RecentModels = make(map[SelectedModelType][]SelectedModel)
371	}
372	if c.MCP == nil {
373		c.MCP = make(map[string]MCPConfig)
374	}
375	if c.LSP == nil {
376		c.LSP = make(map[string]LSPConfig)
377	}
378
379	// Apply defaults to LSP configurations
380	c.applyLSPDefaults()
381
382	// Add the default context paths if they are not already present
383	c.Options.ContextPaths = append(defaultContextPaths, c.Options.ContextPaths...)
384
385	slices.Sort(c.Options.ContextPaths)
386	c.Options.ContextPaths = slices.Compact(c.Options.ContextPaths)
387
388	// Add the default skills directories if not already present.
389	for _, dir := range GlobalSkillsDirs() {
390		if !slices.Contains(c.Options.SkillsPaths, dir) {
391			c.Options.SkillsPaths = append(c.Options.SkillsPaths, dir)
392		}
393	}
394
395	if str, ok := os.LookupEnv("CRUSH_DISABLE_PROVIDER_AUTO_UPDATE"); ok {
396		c.Options.DisableProviderAutoUpdate, _ = strconv.ParseBool(str)
397	}
398
399	if str, ok := os.LookupEnv("CRUSH_DISABLE_DEFAULT_PROVIDERS"); ok {
400		c.Options.DisableDefaultProviders, _ = strconv.ParseBool(str)
401	}
402
403	if c.Options.Attribution == nil {
404		c.Options.Attribution = &Attribution{
405			TrailerStyle:  TrailerStyleAssistedBy,
406			GeneratedWith: true,
407		}
408	} else if c.Options.Attribution.TrailerStyle == "" {
409		// Migrate deprecated co_authored_by or apply default
410		if c.Options.Attribution.CoAuthoredBy != nil {
411			if *c.Options.Attribution.CoAuthoredBy {
412				c.Options.Attribution.TrailerStyle = TrailerStyleCoAuthoredBy
413			} else {
414				c.Options.Attribution.TrailerStyle = TrailerStyleNone
415			}
416		} else {
417			c.Options.Attribution.TrailerStyle = TrailerStyleAssistedBy
418		}
419	}
420	if c.Options.InitializeAs == "" {
421		c.Options.InitializeAs = defaultInitializeAs
422	}
423}
424
425// applyLSPDefaults applies default values from powernap to LSP configurations
426func (c *Config) applyLSPDefaults() {
427	// Get powernap's default configuration
428	configManager := powernapConfig.NewManager()
429	configManager.LoadDefaults()
430
431	// Apply defaults to each LSP configuration
432	for name, cfg := range c.LSP {
433		// Try to get defaults from powernap based on name or command name.
434		base, ok := configManager.GetServer(name)
435		if !ok {
436			base, ok = configManager.GetServer(cfg.Command)
437			if !ok {
438				continue
439			}
440		}
441		if cfg.Options == nil {
442			cfg.Options = base.Settings
443		}
444		if cfg.InitOptions == nil {
445			cfg.InitOptions = base.InitOptions
446		}
447		if len(cfg.FileTypes) == 0 {
448			cfg.FileTypes = base.FileTypes
449		}
450		if len(cfg.RootMarkers) == 0 {
451			cfg.RootMarkers = base.RootMarkers
452		}
453		if cfg.Command == "" {
454			cfg.Command = base.Command
455		}
456		if len(cfg.Args) == 0 {
457			cfg.Args = base.Args
458		}
459		if len(cfg.Env) == 0 {
460			cfg.Env = base.Environment
461		}
462		// Update the config in the map
463		c.LSP[name] = cfg
464	}
465}
466
467func (c *Config) defaultModelSelection(knownProviders []catwalk.Provider) (largeModel SelectedModel, smallModel SelectedModel, err error) {
468	if len(knownProviders) == 0 && c.Providers.Len() == 0 {
469		err = fmt.Errorf("no providers configured, please configure at least one provider")
470		return largeModel, smallModel, err
471	}
472
473	// Use the first provider enabled based on the known providers order
474	// if no provider found that is known use the first provider configured
475	for _, p := range knownProviders {
476		providerConfig, ok := c.Providers.Get(string(p.ID))
477		if !ok || providerConfig.Disable {
478			continue
479		}
480		defaultLargeModel := c.GetModel(string(p.ID), p.DefaultLargeModelID)
481		if defaultLargeModel == nil {
482			err = fmt.Errorf("default large model %s not found for provider %s", p.DefaultLargeModelID, p.ID)
483			return largeModel, smallModel, err
484		}
485		largeModel = SelectedModel{
486			Provider:        string(p.ID),
487			Model:           defaultLargeModel.ID,
488			MaxTokens:       defaultLargeModel.DefaultMaxTokens,
489			ReasoningEffort: defaultLargeModel.DefaultReasoningEffort,
490		}
491
492		defaultSmallModel := c.GetModel(string(p.ID), p.DefaultSmallModelID)
493		if defaultSmallModel == nil {
494			err = fmt.Errorf("default small model %s not found for provider %s", p.DefaultSmallModelID, p.ID)
495			return largeModel, smallModel, err
496		}
497		smallModel = SelectedModel{
498			Provider:        string(p.ID),
499			Model:           defaultSmallModel.ID,
500			MaxTokens:       defaultSmallModel.DefaultMaxTokens,
501			ReasoningEffort: defaultSmallModel.DefaultReasoningEffort,
502		}
503		return largeModel, smallModel, err
504	}
505
506	enabledProviders := c.EnabledProviders()
507	slices.SortFunc(enabledProviders, func(a, b ProviderConfig) int {
508		return strings.Compare(a.ID, b.ID)
509	})
510
511	if len(enabledProviders) == 0 {
512		err = fmt.Errorf("no providers configured, please configure at least one provider")
513		return largeModel, smallModel, err
514	}
515
516	providerConfig := enabledProviders[0]
517	if len(providerConfig.Models) == 0 {
518		err = fmt.Errorf("provider %s has no models configured", providerConfig.ID)
519		return largeModel, smallModel, err
520	}
521	defaultLargeModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
522	largeModel = SelectedModel{
523		Provider:  providerConfig.ID,
524		Model:     defaultLargeModel.ID,
525		MaxTokens: defaultLargeModel.DefaultMaxTokens,
526	}
527	defaultSmallModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
528	smallModel = SelectedModel{
529		Provider:  providerConfig.ID,
530		Model:     defaultSmallModel.ID,
531		MaxTokens: defaultSmallModel.DefaultMaxTokens,
532	}
533	return largeModel, smallModel, err
534}
535
536func (c *Config) configureSelectedModels(knownProviders []catwalk.Provider) error {
537	defaultLarge, defaultSmall, err := c.defaultModelSelection(knownProviders)
538	if err != nil {
539		return fmt.Errorf("failed to select default models: %w", err)
540	}
541	large, small := defaultLarge, defaultSmall
542
543	largeModelSelected, largeModelConfigured := c.Models[SelectedModelTypeLarge]
544	if largeModelConfigured {
545		if largeModelSelected.Model != "" {
546			large.Model = largeModelSelected.Model
547		}
548		if largeModelSelected.Provider != "" {
549			large.Provider = largeModelSelected.Provider
550		}
551		model := c.GetModel(large.Provider, large.Model)
552		if model == nil {
553			large = defaultLarge
554			// override the model type to large
555			err := c.UpdatePreferredModel(SelectedModelTypeLarge, large)
556			if err != nil {
557				return fmt.Errorf("failed to update preferred large model: %w", err)
558			}
559		} else {
560			if largeModelSelected.MaxTokens > 0 {
561				large.MaxTokens = largeModelSelected.MaxTokens
562			} else {
563				large.MaxTokens = model.DefaultMaxTokens
564			}
565			if largeModelSelected.ReasoningEffort != "" {
566				large.ReasoningEffort = largeModelSelected.ReasoningEffort
567			}
568			large.Think = largeModelSelected.Think
569			if largeModelSelected.Temperature != nil {
570				large.Temperature = largeModelSelected.Temperature
571			}
572			if largeModelSelected.TopP != nil {
573				large.TopP = largeModelSelected.TopP
574			}
575			if largeModelSelected.TopK != nil {
576				large.TopK = largeModelSelected.TopK
577			}
578			if largeModelSelected.FrequencyPenalty != nil {
579				large.FrequencyPenalty = largeModelSelected.FrequencyPenalty
580			}
581			if largeModelSelected.PresencePenalty != nil {
582				large.PresencePenalty = largeModelSelected.PresencePenalty
583			}
584		}
585	}
586	smallModelSelected, smallModelConfigured := c.Models[SelectedModelTypeSmall]
587	if smallModelConfigured {
588		if smallModelSelected.Model != "" {
589			small.Model = smallModelSelected.Model
590		}
591		if smallModelSelected.Provider != "" {
592			small.Provider = smallModelSelected.Provider
593		}
594
595		model := c.GetModel(small.Provider, small.Model)
596		if model == nil {
597			small = defaultSmall
598			// override the model type to small
599			err := c.UpdatePreferredModel(SelectedModelTypeSmall, small)
600			if err != nil {
601				return fmt.Errorf("failed to update preferred small model: %w", err)
602			}
603		} else {
604			if smallModelSelected.MaxTokens > 0 {
605				small.MaxTokens = smallModelSelected.MaxTokens
606			} else {
607				small.MaxTokens = model.DefaultMaxTokens
608			}
609			if smallModelSelected.ReasoningEffort != "" {
610				small.ReasoningEffort = smallModelSelected.ReasoningEffort
611			}
612			if smallModelSelected.Temperature != nil {
613				small.Temperature = smallModelSelected.Temperature
614			}
615			if smallModelSelected.TopP != nil {
616				small.TopP = smallModelSelected.TopP
617			}
618			if smallModelSelected.TopK != nil {
619				small.TopK = smallModelSelected.TopK
620			}
621			if smallModelSelected.FrequencyPenalty != nil {
622				small.FrequencyPenalty = smallModelSelected.FrequencyPenalty
623			}
624			if smallModelSelected.PresencePenalty != nil {
625				small.PresencePenalty = smallModelSelected.PresencePenalty
626			}
627			small.Think = smallModelSelected.Think
628		}
629	}
630	c.Models[SelectedModelTypeLarge] = large
631	c.Models[SelectedModelTypeSmall] = small
632	return nil
633}
634
635// lookupConfigs searches config files recursively from CWD up to FS root
636func lookupConfigs(cwd string) []string {
637	// prepend default config paths
638	configPaths := []string{
639		GlobalConfig(),
640		GlobalConfigData(),
641	}
642
643	configNames := []string{appName + ".json", "." + appName + ".json"}
644
645	foundConfigs, err := fsext.Lookup(cwd, configNames...)
646	if err != nil {
647		// returns at least default configs
648		return configPaths
649	}
650
651	// reverse order so last config has more priority
652	slices.Reverse(foundConfigs)
653
654	return append(configPaths, foundConfigs...)
655}
656
657func loadFromConfigPaths(configPaths []string) (*Config, error) {
658	var configs [][]byte
659
660	for _, path := range configPaths {
661		data, err := os.ReadFile(path)
662		if err != nil {
663			if os.IsNotExist(err) {
664				continue
665			}
666			return nil, fmt.Errorf("failed to open config file %s: %w", path, err)
667		}
668		if len(data) == 0 {
669			continue
670		}
671		configs = append(configs, data)
672	}
673
674	return loadFromBytes(configs)
675}
676
677func loadFromBytes(configs [][]byte) (*Config, error) {
678	if len(configs) == 0 {
679		return &Config{}, nil
680	}
681
682	data, err := jsons.Merge(configs)
683	if err != nil {
684		return nil, err
685	}
686	var config Config
687	if err := json.Unmarshal(data, &config); err != nil {
688		return nil, err
689	}
690	return &config, nil
691}
692
693func hasVertexCredentials(env env.Env) bool {
694	hasProject := env.Get("VERTEXAI_PROJECT") != ""
695	hasLocation := env.Get("VERTEXAI_LOCATION") != ""
696	return hasProject && hasLocation
697}
698
699func hasAWSCredentials(env env.Env) bool {
700	if env.Get("AWS_BEARER_TOKEN_BEDROCK") != "" {
701		return true
702	}
703
704	if env.Get("AWS_ACCESS_KEY_ID") != "" && env.Get("AWS_SECRET_ACCESS_KEY") != "" {
705		return true
706	}
707
708	if env.Get("AWS_PROFILE") != "" || env.Get("AWS_DEFAULT_PROFILE") != "" {
709		return true
710	}
711
712	if env.Get("AWS_REGION") != "" || env.Get("AWS_DEFAULT_REGION") != "" {
713		return true
714	}
715
716	if env.Get("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI") != "" ||
717		env.Get("AWS_CONTAINER_CREDENTIALS_FULL_URI") != "" {
718		return true
719	}
720
721	if _, err := os.Stat(filepath.Join(home.Dir(), ".aws/credentials")); err == nil && !testing.Testing() {
722		return true
723	}
724
725	return false
726}
727
728// GlobalConfig returns the global configuration file path for the application.
729func GlobalConfig() string {
730	if crushGlobal := os.Getenv("CRUSH_GLOBAL_CONFIG"); crushGlobal != "" {
731		return filepath.Join(crushGlobal, fmt.Sprintf("%s.json", appName))
732	}
733	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
734		return filepath.Join(xdgConfigHome, appName, fmt.Sprintf("%s.json", appName))
735	}
736	return filepath.Join(home.Dir(), ".config", appName, fmt.Sprintf("%s.json", appName))
737}
738
739// GlobalConfigData returns the path to the main data directory for the application.
740// this config is used when the app overrides configurations instead of updating the global config.
741func GlobalConfigData() string {
742	if crushData := os.Getenv("CRUSH_GLOBAL_DATA"); crushData != "" {
743		return filepath.Join(crushData, fmt.Sprintf("%s.json", appName))
744	}
745	if xdgDataHome := os.Getenv("XDG_DATA_HOME"); xdgDataHome != "" {
746		return filepath.Join(xdgDataHome, appName, fmt.Sprintf("%s.json", appName))
747	}
748
749	// return the path to the main data directory
750	// for windows, it should be in `%LOCALAPPDATA%/crush/`
751	// for linux and macOS, it should be in `$HOME/.local/share/crush/`
752	if runtime.GOOS == "windows" {
753		localAppData := cmp.Or(
754			os.Getenv("LOCALAPPDATA"),
755			filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local"),
756		)
757		return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
758	}
759
760	return filepath.Join(home.Dir(), ".local", "share", appName, fmt.Sprintf("%s.json", appName))
761}
762
763func assignIfNil[T any](ptr **T, val T) {
764	if *ptr == nil {
765		*ptr = &val
766	}
767}
768
769func isInsideWorktree() bool {
770	bts, err := exec.CommandContext(
771		context.Background(),
772		"git", "rev-parse",
773		"--is-inside-work-tree",
774	).CombinedOutput()
775	return err == nil && strings.TrimSpace(string(bts)) == "true"
776}
777
778// GlobalSkillsDirs returns the default directories for Agent Skills.
779// Skills in these directories are auto-discovered and their files can be read
780// without permission prompts.
781func GlobalSkillsDirs() []string {
782	if crushSkills := os.Getenv("CRUSH_SKILLS_DIR"); crushSkills != "" {
783		return []string{crushSkills}
784	}
785
786	// Determine the base config directory.
787	var configBase string
788	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
789		configBase = xdgConfigHome
790	} else if runtime.GOOS == "windows" {
791		configBase = cmp.Or(
792			os.Getenv("LOCALAPPDATA"),
793			filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local"),
794		)
795	} else {
796		configBase = filepath.Join(home.Dir(), ".config")
797	}
798
799	return []string{
800		filepath.Join(configBase, appName, "skills"),
801		filepath.Join(configBase, "agents", "skills"),
802	}
803}