feat: support disabling providers

README.md

@@ -101,7 +101,7 @@ olpx alias list
 注意：
 
 - target 的顺序就是失败切换顺序
-- enabled alias 必须至少有一个 enabled target
+- enabled alias 必须至少有一个可路由 target
 - `olpx alias bind` 在 alias 不存在时会自动创建一个 enabled alias
 
 ### 3. 先做一次静态检查
@@ -116,7 +116,7 @@ olpx doctor
 
 - 本地 `olpx` 配置能不能正常加载
 - alias 是否引用了不存在的 provider
-- enabled alias 是否至少有一个 enabled target
+- enabled alias 是否至少有一个可路由 target
 - 本地代理监听地址是否合理
 - 默认会同步到哪个 OpenCode 配置文件
 
@@ -126,7 +126,7 @@ olpx doctor
 olpx opencode sync
 ```
 
-这个命令会做一件事：把当前 alias 列表同步进 OpenCode 的 `provider.olpx.models`。
+这个命令会做一件事：把当前可路由的 alias 列表同步进 OpenCode 的 `provider.olpx.models`。
 
 默认行为：
 
@@ -262,6 +262,18 @@ olpx provider add --id <id> --base-url <url-with-/v1> --api-key <key>
 olpx provider list
 ```
 
+禁用 provider：
+
+```bash
+olpx provider disable <id>
+```
+
+重新启用 provider：
+
+```bash
+olpx provider enable <id>
+```
+
 删除 provider：
 
 ```bash
@@ -365,7 +377,8 @@ olpx --config /path/to/config.json doctor
       "id": "codex",
       "name": "Codex",
       "base_url": "https://api-vip.codex-for.me/v1",
-      "api_key": "sk-yyy"
+      "api_key": "sk-yyy",
+      "disabled": true
     }
   ],
   "aliases": [
@@ -406,7 +419,7 @@ olpx --config /path/to/config.json doctor
 
 - alias 不存在
 - alias 被禁用
-- alias 没有 enabled target
+- alias 没有可用 target
 - 上游返回 `400`
 - 上游返回 `401`
 - 上游返回 `403`
@@ -445,19 +458,32 @@ olpx --config /path/to/config.json doctor
 
 1. 你是否执行过 `olpx opencode sync`
 2. 你的 alias 是否是 enabled 状态
-3. alias 是否至少绑定了一个 enabled target
+3. alias 是否至少绑定了一个可路由 target
-4. OpenCode 当前实际使用的配置文件，是否就是 `olpx opencode sync` 写入的那个文件
+4. alias 绑定的 provider 是否都被禁用了
-5. 执行一次 `olpx doctor`，看输出里的 `opencode config target`
+5. OpenCode 当前实际使用的配置文件，是否就是 `olpx opencode sync` 写入的那个文件
+6. 执行一次 `olpx doctor`，看输出里的 `opencode config target`
 
-### 为什么 `olpx doctor` 报 alias 没有 enabled target？
+### 为什么 `olpx doctor` 报 alias 没有可用 target？
 
-因为当前实现要求：只要 alias 是 enabled，就必须至少有一个 enabled target。
+因为当前实现要求：只要 alias 是 enabled，就必须至少有一个可路由的 target。
+
+可路由的意思是同时满足：
+
+- target 自己是 enabled
+- target 引用的 provider 存在且没有被禁用
 
 你可以：
 
 - 给它绑定 target
+- 重新启用被禁用的 provider
 - 或者把这个 alias 改成 disabled 后再保存
 
+### 为什么要禁用 provider，而不是把 alias target 也改成 disabled？
+
+因为 provider 可能被多个 alias 复用。
+
+`olpx provider disable` 只会让路由层在 failover 时自动跳过这个 provider，不会改写 alias 里的 target 状态，这样重新启用 provider 时不会和 alias 上原有的启用关系打架。
+
 ### 删除 provider 后为什么还有报错？
 
 因为 alias 里的 target 还是旧引用。需要继续执行：

README_EN.md

@@ -7,6 +7,7 @@ stable model alias** routed to **multiple upstream providers** with
 - Expose one custom provider `olpx` to OpenCode.
 - Configure logical aliases (`olpx/gpt-5.4`, etc.).
 - Each alias has an ordered list of upstream `provider/model` targets.
+- Providers can be disabled without mutating alias target state.
 - When the primary upstream returns `5xx`/`429`/connect error *before* any
   stream bytes are flushed, `olpx` transparently retries the next target.
 - Once a stream has started, the upstream is locked for the rest of that
@@ -35,6 +36,9 @@ olpx alias bind --alias gpt-5.4 --provider codex --model GPT-5.4
 # 3. push alias exposure into OpenCode global config
 olpx opencode sync
 
+# optional: temporarily disable one provider without editing alias targets
+olpx provider disable su8
+
 # 4. run the proxy
 olpx serve
 ```
@@ -63,11 +67,33 @@ olpx doctor
 
 Runs structural checks only — never issues real upstream requests.
 
+Enabled aliases must have at least one **routable** target. A target is
+considered routable only when:
+
+- the alias itself is enabled
+- the target itself is enabled
+- the referenced provider exists
+- the referenced provider is not disabled
+
+`olpx opencode sync` and `/v1/models` use the same routable-alias view, so
+OpenCode does not see aliases that the proxy would immediately reject.
+
+### Provider state
+
+```bash
+olpx provider disable <id>
+olpx provider enable <id>
+```
+
+Disabling a provider only removes it from routing/failover consideration. It
+does **not** rewrite alias target `enabled` flags in config, which avoids odd
+interactions when the same provider is shared across multiple aliases.
+
 ## CLI reference
 
 - `olpx serve` — run the proxy
 - `olpx doctor` — validate config
-- `olpx provider {add,list,remove,import-opencode}`
+- `olpx provider {add,list,enable,disable,remove,import-opencode}`
 - `olpx alias {add,list,bind,unbind,remove}`
 - `olpx opencode sync [--target FILE] [--set-model ALIAS] [--set-small-model ALIAS] [--dry-run]`
 
@@ -86,6 +112,7 @@ Every proxied response includes:
 ## Scope
 
 Out of MVP: Anthropic native, multi-protocol routing, dashboard, billing,
-latency-based routing, `/v1/models` discovery, full OpenCode config takeover.
+latency-based routing, full `/v1/models` provider discovery, full OpenCode
+config takeover.
 See `.trellis/tasks/archive/2026-04/04-17-04-17-ops-mvp-design-review/prd.md`
 for the authoritative design notes.

internal/cli/alias.go

@@ -85,7 +85,15 @@ func newAliasListCmd() *cobra.Command {
 					if !t.Enabled {
 						mark = " "
 					}
-					fmt.Fprintf(cmd.OutOrStdout(), "  [%s] %d. %s/%s\n", mark, i+1, t.Provider, t.Model)
+					note := ""
+					provider := cfg.FindProvider(t.Provider)
+					switch {
+					case provider == nil:
+						note = " (missing provider)"
+					case !provider.IsEnabled():
+						note = " (provider disabled)"
+					}
+					fmt.Fprintf(cmd.OutOrStdout(), "  [%s] %d. %s/%s%s\n", mark, i+1, t.Provider, t.Model, note)
 				}
 			}
 			return nil

internal/cli/cli_test.go

@@ -17,11 +17,12 @@ func TestProviderAddPreservesExistingFields(t *testing.T) {
 		t.Fatalf("loadCfg: %v", err)
 	}
 	cfg.UpsertProvider(config.Provider{
-		ID:      "p1",
+		ID:       "p1",
-		Name:    "Old",
+		Name:     "Old",
-		BaseURL: "https://old.example.com/v1",
+		BaseURL:  "https://old.example.com/v1",
-		APIKey:  "sk-old",
+		APIKey:   "sk-old",
-		Headers: map[string]string{"X-Test": "1"},
+		Headers:  map[string]string{"X-Test": "1"},
+		Disabled: true,
 	})
 	if err := cfg.Save(); err != nil {
 		t.Fatalf("save config: %v", err)
@@ -53,6 +54,9 @@ func TestProviderAddPreservesExistingFields(t *testing.T) {
 	if p.BaseURL != "https://new.example.com/v1" {
 		t.Fatalf("BaseURL = %q, want updated URL", p.BaseURL)
 	}
+	if !p.Disabled {
+		t.Fatal("Disabled = false, want true to preserve provider state")
+	}
 }
 
 func TestProviderAddRejectsInvalidBaseURL(t *testing.T) {
@@ -116,3 +120,48 @@ func TestAliasAddPreservesExistingFields(t *testing.T) {
 		t.Fatalf("Targets = %#v, want preserved target", a.Targets)
 	}
 }
+
+func TestProviderEnableDisableCommands(t *testing.T) {
+	t.Setenv("OLPX_CONFIG", filepath.Join(t.TempDir(), "olpx.json"))
+	configPath = ""
+
+	cfg, err := loadCfg()
+	if err != nil {
+		t.Fatalf("loadCfg: %v", err)
+	}
+	cfg.UpsertProvider(config.Provider{
+		ID:      "p1",
+		BaseURL: "https://example.com/v1",
+	})
+	if err := cfg.Save(); err != nil {
+		t.Fatalf("save config: %v", err)
+	}
+
+	disableCmd := newProviderDisableCmd()
+	disableCmd.SetArgs([]string{"p1"})
+	if err := disableCmd.Execute(); err != nil {
+		t.Fatalf("execute provider disable: %v", err)
+	}
+
+	cfg, err = loadCfg()
+	if err != nil {
+		t.Fatalf("reload after disable: %v", err)
+	}
+	if provider := cfg.FindProvider("p1"); provider == nil || !provider.Disabled {
+		t.Fatalf("provider after disable = %#v, want disabled=true", provider)
+	}
+
+	enableCmd := newProviderEnableCmd()
+	enableCmd.SetArgs([]string{"p1"})
+	if err := enableCmd.Execute(); err != nil {
+		t.Fatalf("execute provider enable: %v", err)
+	}
+
+	cfg, err = loadCfg()
+	if err != nil {
+		t.Fatalf("reload after enable: %v", err)
+	}
+	if provider := cfg.FindProvider("p1"); provider == nil || provider.Disabled {
+		t.Fatalf("provider after enable = %#v, want disabled=false", provider)
+	}
+}

internal/cli/doctor.go

@@ -24,13 +24,7 @@ func newDoctorCmd() *cobra.Command {
 			if err != nil {
 				issues = append(issues, fmt.Errorf("load opencode config target: %w", err))
 			} else {
-				aliasNames := []string{}
+				aliasNames := cfg.AvailableAliasNames()
-				for _, a := range cfg.Aliases {
-					if !a.Enabled {
-						continue
-					}
-					aliasNames = append(aliasNames, a.Alias)
-				}
 				baseURL := fmt.Sprintf("http://%s:%d/v1", cfg.Server.Host, cfg.Server.Port)
 				opencode.EnsureOLPXProvider(raw, baseURL, cfg.Server.APIKey, aliasNames)
 				if err := opencode.ValidateOLPXProvider(raw, baseURL, cfg.Server.APIKey, aliasNames); err != nil {

internal/cli/opencode.go

@@ -51,13 +51,7 @@ or creating opencode.jsonc if none exists. It does NOT touch the top-level
 			if err != nil {
 				return err
 			}
-			aliasNames := []string{}
+			aliasNames := cfg.AvailableAliasNames()
-			for _, a := range cfg.Aliases {
-				if !a.Enabled {
-					continue
-				}
-				aliasNames = append(aliasNames, a.Alias)
-			}
 			baseURL := fmt.Sprintf("http://%s:%d/v1", cfg.Server.Host, cfg.Server.Port)
 			changed := opencode.EnsureOLPXProvider(raw, baseURL, cfg.Server.APIKey, aliasNames)
 			if setModel != "" {

internal/cli/provider.go

@@ -16,13 +16,21 @@ func newProviderCmd() *cobra.Command {
 		Use:   "provider",
 		Short: "Manage upstream providers",
 	}
-	c.AddCommand(newProviderAddCmd(), newProviderListCmd(), newProviderRemoveCmd(), newProviderImportCmd())
+	c.AddCommand(
+		newProviderAddCmd(),
+		newProviderListCmd(),
+		newProviderEnableCmd(),
+		newProviderDisableCmd(),
+		newProviderRemoveCmd(),
+		newProviderImportCmd(),
+	)
 	return c
 }
 
 func newProviderAddCmd() *cobra.Command {
 	var id, name, baseURL, apiKey string
 	var headers []string
+	var disabled bool
 	cmd := &cobra.Command{
 		Use:   "add",
 		Short: "Add or update an upstream provider",
@@ -46,11 +54,12 @@ func newProviderAddCmd() *cobra.Command {
 				hdrs[strings.TrimSpace(k)] = strings.TrimSpace(v)
 			}
 			p := config.Provider{
-				ID:      id,
+				ID:       id,
-				Name:    name,
+				Name:     name,
-				BaseURL: baseURL,
+				BaseURL:  baseURL,
-				APIKey:  apiKey,
+				APIKey:   apiKey,
-				Headers: hdrs,
+				Headers:  hdrs,
+				Disabled: disabled,
 			}
 			if existing := cfg.FindProvider(id); existing != nil {
 				if p.Name == "" {
@@ -62,12 +71,19 @@ func newProviderAddCmd() *cobra.Command {
 				if len(headers) == 0 && len(existing.Headers) > 0 {
 					p.Headers = cloneHeaders(existing.Headers)
 				}
+				if !disabled {
+					p.Disabled = existing.Disabled
+				}
 			}
 			cfg.UpsertProvider(p)
 			if err := cfg.Save(); err != nil {
 				return err
 			}
-			fmt.Fprintf(cmd.OutOrStdout(), "saved provider %q → %s\n", id, baseURL)
+			state := "enabled"
+			if p.Disabled {
+				state = "disabled"
+			}
+			fmt.Fprintf(cmd.OutOrStdout(), "saved provider %q [%s] → %s\n", id, state, baseURL)
 			return nil
 		},
 	}
@@ -76,6 +92,7 @@ func newProviderAddCmd() *cobra.Command {
 	cmd.Flags().StringVar(&baseURL, "base-url", "", "OpenAI-compatible base URL, including /v1 (required)")
 	cmd.Flags().StringVar(&apiKey, "api-key", "", "upstream API key")
 	cmd.Flags().StringArrayVar(&headers, "header", nil, "extra header KEY=VALUE (repeatable)")
+	cmd.Flags().BoolVar(&disabled, "disabled", false, "save provider in disabled state")
 	return cmd
 }
 
@@ -110,13 +127,55 @@ func newProviderListCmd() *cobra.Command {
 				if p.APIKey != "" {
 					key = maskKey(p.APIKey)
 				}
-				fmt.Fprintf(cmd.OutOrStdout(), "%-20s %s  apiKey=%s\n", p.ID, p.BaseURL, key)
+				state := "enabled"
+				if !p.IsEnabled() {
+					state = "disabled"
+				}
+				fmt.Fprintf(cmd.OutOrStdout(), "%-20s [%s] %s  apiKey=%s\n", p.ID, state, p.BaseURL, key)
 			}
 			return nil
 		},
 	}
 }
 
+func newProviderEnableCmd() *cobra.Command {
+	return newProviderStateCmd("enable", false)
+}
+
+func newProviderDisableCmd() *cobra.Command {
+	return newProviderStateCmd("disable", true)
+}
+
+func newProviderStateCmd(use string, disabled bool) *cobra.Command {
+	action := "enabled"
+	if disabled {
+		action = "disabled"
+	}
+	return &cobra.Command{
+		Use:   use + " <id>",
+		Args:  cobra.ExactArgs(1),
+		Short: strings.Title(action[:len(action)-1]) + " a provider without changing alias target state",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cfg, err := loadCfg()
+			if err != nil {
+				return err
+			}
+			existing := cfg.FindProvider(args[0])
+			if existing == nil {
+				return fmt.Errorf("provider %q not found", args[0])
+			}
+			updated := *existing
+			updated.Disabled = disabled
+			cfg.UpsertProvider(updated)
+			if err := cfg.Save(); err != nil {
+				return err
+			}
+			fmt.Fprintf(cmd.OutOrStdout(), "%s provider %q\n", action, args[0])
+			return nil
+		},
+	}
+}
+
 func newProviderRemoveCmd() *cobra.Command {
 	return &cobra.Command{
 		Use:   "remove <id>",
@@ -175,10 +234,11 @@ func newProviderImportCmd() *cobra.Command {
 					continue
 				}
 				cfg.UpsertProvider(config.Provider{
-					ID:      ip.ID,
+					ID:       ip.ID,
-					Name:    ip.Name,
+					Name:     ip.Name,
-					BaseURL: ip.BaseURL,
+					BaseURL:  ip.BaseURL,
-					APIKey:  ip.APIKey,
+					APIKey:   ip.APIKey,
+					Disabled: false,
 				})
 				imported++
 				fmt.Fprintf(cmd.OutOrStdout(), "import %q → %s (models: %s)\n", ip.ID, ip.BaseURL, strings.Join(ip.Models, ","))

internal/config/config.go

@@ -29,11 +29,12 @@ type Alias struct {
 
 // Provider is one upstream OpenAI-compatible endpoint.
 type Provider struct {
-	ID      string            `json:"id"`
+	ID       string            `json:"id"`
-	Name    string            `json:"name,omitempty"`
+	Name     string            `json:"name,omitempty"`
-	BaseURL string            `json:"base_url"`
+	BaseURL  string            `json:"base_url"`
-	APIKey  string            `json:"api_key"`
+	APIKey   string            `json:"api_key"`
-	Headers map[string]string `json:"headers,omitempty"`
+	Headers  map[string]string `json:"headers,omitempty"`
+	Disabled bool              `json:"disabled,omitempty"`
 }
 
 // Server holds proxy listen settings.
@@ -53,6 +54,11 @@ type Config struct {
 	mu   sync.RWMutex
 }
 
+// IsEnabled reports whether the provider can be used for routing.
+func (p Provider) IsEnabled() bool {
+	return !p.Disabled
+}
+
 // ValidateProviderBaseURL checks the MVP requirement that upstream base URLs
 // point at an OpenAI-compatible /v1 root.
 func ValidateProviderBaseURL(baseURL string) error {
@@ -166,6 +172,10 @@ func (c *Config) Save() error {
 func (c *Config) FindProvider(id string) *Provider {
 	c.mu.RLock()
 	defer c.mu.RUnlock()
+	return c.findProviderLocked(id)
+}
+
+func (c *Config) findProviderLocked(id string) *Provider {
 	for i := range c.Providers {
 		if c.Providers[i].ID == id {
 			return &c.Providers[i]
@@ -283,6 +293,47 @@ func (c *Config) RemoveTarget(alias, provider, model string) error {
 	return fmt.Errorf("alias %q not found", alias)
 }
 
+// AvailableTargets returns alias targets that are individually enabled and point
+// at providers that still exist and are enabled.
+func (c *Config) AvailableTargets(alias Alias) []Target {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	return c.availableTargetsLocked(alias)
+}
+
+func (c *Config) availableTargetsLocked(alias Alias) []Target {
+	targets := make([]Target, 0, len(alias.Targets))
+	for _, t := range alias.Targets {
+		if !t.Enabled {
+			continue
+		}
+		provider := c.findProviderLocked(t.Provider)
+		if provider == nil || !provider.IsEnabled() {
+			continue
+		}
+		targets = append(targets, t)
+	}
+	return targets
+}
+
+// AvailableAliasNames returns alias names that are enabled and still have at
+// least one routable target after provider availability is applied.
+func (c *Config) AvailableAliasNames() []string {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	names := make([]string, 0, len(c.Aliases))
+	for _, a := range c.Aliases {
+		if !a.Enabled {
+			continue
+		}
+		if len(c.availableTargetsLocked(a)) == 0 {
+			continue
+		}
+		names = append(names, a.Alias)
+	}
+	return names
+}
+
 // Validate returns a non-nil error slice for every structural issue found.
 func (c *Config) Validate() []error {
 	c.mu.RLock()
@@ -325,12 +376,10 @@ func (c *Config) Validate() []error {
 			if !ids[t.Provider] {
 				errs = append(errs, fmt.Errorf("alias %q references unknown provider %q", a.Alias, t.Provider))
 			}
-			if t.Enabled {
-				enabled++
-			}
 		}
+		enabled = len(c.availableTargetsLocked(a))
 		if a.Enabled && enabled == 0 {
-			errs = append(errs, fmt.Errorf("alias %q has no enabled targets", a.Alias))
+			errs = append(errs, fmt.Errorf("alias %q has no available targets", a.Alias))
 		}
 	}
 	if c.Server.Port <= 0 || c.Server.Port > 65535 {

internal/config/config_test.go

@@ -1,6 +1,8 @@
 package config
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestValidateProviderBaseURL(t *testing.T) {
 	t.Parallel()
@@ -36,3 +38,75 @@ func TestValidateProviderBaseURL(t *testing.T) {
 		})
 	}
 }
+
+func TestAvailableTargetsSkipsDisabledAndMissingProviders(t *testing.T) {
+	t.Parallel()
+
+	cfg := &Config{
+		Providers: []Provider{
+			{ID: "p1", BaseURL: "https://p1.example.com/v1"},
+			{ID: "p2", BaseURL: "https://p2.example.com/v1", Disabled: true},
+		},
+	}
+	alias := Alias{
+		Alias:   "gpt-5.4",
+		Enabled: true,
+		Targets: []Target{
+			{Provider: "p1", Model: "up-1", Enabled: true},
+			{Provider: "p2", Model: "up-2", Enabled: true},
+			{Provider: "missing", Model: "up-3", Enabled: true},
+			{Provider: "p1", Model: "up-4", Enabled: false},
+		},
+	}
+
+	targets := cfg.AvailableTargets(alias)
+	if len(targets) != 1 {
+		t.Fatalf("available targets = %#v, want exactly one", targets)
+	}
+	if targets[0].Provider != "p1" || targets[0].Model != "up-1" {
+		t.Fatalf("available target = %#v, want p1/up-1", targets[0])
+	}
+}
+
+func TestAvailableAliasNamesOnlyReturnsRoutableAliases(t *testing.T) {
+	t.Parallel()
+
+	cfg := &Config{
+		Providers: []Provider{
+			{ID: "p1", BaseURL: "https://p1.example.com/v1"},
+			{ID: "p2", BaseURL: "https://p2.example.com/v1", Disabled: true},
+		},
+		Aliases: []Alias{
+			{Alias: "ok", Enabled: true, Targets: []Target{{Provider: "p1", Model: "up-1", Enabled: true}}},
+			{Alias: "provider-disabled", Enabled: true, Targets: []Target{{Provider: "p2", Model: "up-2", Enabled: true}}},
+			{Alias: "alias-disabled", Enabled: false, Targets: []Target{{Provider: "p1", Model: "up-3", Enabled: true}}},
+		},
+	}
+
+	names := cfg.AvailableAliasNames()
+	if len(names) != 1 || names[0] != "ok" {
+		t.Fatalf("available alias names = %#v, want [ok]", names)
+	}
+}
+
+func TestValidateReportsAliasWithoutAvailableTargets(t *testing.T) {
+	t.Parallel()
+
+	cfg := &Config{
+		Server:    Server{Host: "127.0.0.1", Port: 9982, APIKey: "olpx-local"},
+		Providers: []Provider{{ID: "p1", BaseURL: "https://p1.example.com/v1", Disabled: true}},
+		Aliases: []Alias{{
+			Alias:   "gpt-5.4",
+			Enabled: true,
+			Targets: []Target{{Provider: "p1", Model: "up-1", Enabled: true}},
+		}},
+	}
+
+	errs := cfg.Validate()
+	if len(errs) != 1 {
+		t.Fatalf("Validate() errors = %v, want 1 error", errs)
+	}
+	if got := errs[0].Error(); got != `alias "gpt-5.4" has no available targets` {
+		t.Fatalf("Validate() error = %q", got)
+	}
+}

internal/proxy/server.go

@@ -105,12 +105,9 @@ func (s *Server) handleModels(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	data := []map[string]any{}
-	for _, a := range s.cfg.Aliases {
+	for _, aliasName := range s.cfg.AvailableAliasNames() {
-		if !a.Enabled {
-			continue
-		}
 		data = append(data, map[string]any{
-			"id":       a.Alias,
+			"id":       aliasName,
 			"object":   "model",
 			"owned_by": "olpx",
 		})
@@ -177,23 +174,18 @@ func (s *Server) handleResponses(w http.ResponseWriter, r *http.Request) {
 		writeOpenAIError(w, http.StatusNotFound, "model_not_found", fmt.Sprintf("alias %q is disabled", aliasName))
 		return
 	}
-	var targets []config.Target
+	targets := s.cfg.AvailableTargets(*alias)
-	for _, t := range alias.Targets {
-		if t.Enabled {
-			targets = append(targets, t)
-		}
-	}
 	if len(targets) == 0 {
-		s.logger.Printf("req=%d alias=%q has no enabled targets", reqID, aliasName)
+		s.logger.Printf("req=%d alias=%q has no available targets", reqID, aliasName)
-		writeOpenAIError(w, http.StatusBadRequest, "invalid_request_error", fmt.Sprintf("alias %q has no enabled targets", aliasName))
+		writeOpenAIError(w, http.StatusBadRequest, "invalid_request_error", fmt.Sprintf("alias %q has no available targets", aliasName))
 		return
 	}
 
 	failoverCount := 0
 	for attempt, t := range targets {
 		p := s.cfg.FindProvider(t.Provider)
-		if p == nil {
+		if p == nil || !p.IsEnabled() {
-			s.logger.Printf("req=%d alias=%s attempt=%d target provider %q missing, skipping", reqID, aliasName, attempt+1, t.Provider)
+			s.logger.Printf("req=%d alias=%s attempt=%d target provider %q unavailable, skipping", reqID, aliasName, attempt+1, t.Provider)
 			failoverCount++
 			continue
 		}

internal/proxy/server_test.go

@@ -157,6 +157,109 @@ func TestHandleResponsesDoesNotFailOverOn400(t *testing.T) {
 	}
 }
 
+func TestHandleResponsesSkipsDisabledProviders(t *testing.T) {
+	t.Parallel()
+
+	calledDisabled := false
+	disabled := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		calledDisabled = true
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer disabled.Close()
+
+	var seenModel string
+	enabled := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		defer r.Body.Close()
+		var payload map[string]any
+		if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+			t.Fatalf("decode payload: %v", err)
+		}
+		seenModel, _ = payload["model"].(string)
+		w.Header().Set("Content-Type", "text/event-stream")
+		_, _ = w.Write([]byte("data: ok\n\n"))
+	}))
+	defer enabled.Close()
+
+	srv := New(&config.Config{
+		Server: config.Server{APIKey: "olpx-local"},
+		Providers: []config.Provider{
+			{ID: "p1", BaseURL: disabled.URL + "/v1", Disabled: true},
+			{ID: "p2", BaseURL: enabled.URL + "/v1"},
+		},
+		Aliases: []config.Alias{{
+			Alias:   "gpt-5.4",
+			Enabled: true,
+			Targets: []config.Target{{Provider: "p1", Model: "up-1", Enabled: true}, {Provider: "p2", Model: "up-2", Enabled: true}},
+		}},
+	})
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/responses", strings.NewReader(`{"model":"gpt-5.4","stream":true}`))
+	req.Header.Set("Authorization", "Bearer olpx-local")
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "text/event-stream")
+	rr := httptest.NewRecorder()
+
+	srv.handleResponses(rr, req)
+
+	if rr.Code != http.StatusOK {
+		t.Fatalf("status = %d, want %d", rr.Code, http.StatusOK)
+	}
+	if calledDisabled {
+		t.Fatal("disabled provider should be skipped before any upstream call")
+	}
+	if seenModel != "up-2" {
+		t.Fatalf("enabled upstream model = %q, want up-2", seenModel)
+	}
+	if got := rr.Header().Get("X-OLPX-Attempt"); got != "1" {
+		t.Fatalf("X-OLPX-Attempt = %q, want 1", got)
+	}
+	if got := rr.Header().Get("X-OLPX-Failover-Count"); got != "0" {
+		t.Fatalf("X-OLPX-Failover-Count = %q, want 0", got)
+	}
+	if got := rr.Header().Get("X-OLPX-Provider"); got != "p2" {
+		t.Fatalf("X-OLPX-Provider = %q, want p2", got)
+	}
+	if body := rr.Body.String(); body != "data: ok\n\n" {
+		t.Fatalf("body = %q, want SSE payload", body)
+	}
+}
+
+func TestHandleModelsSkipsAliasesWithoutAvailableTargets(t *testing.T) {
+	t.Parallel()
+
+	srv := New(&config.Config{
+		Server: config.Server{APIKey: "olpx-local"},
+		Providers: []config.Provider{
+			{ID: "p1", BaseURL: "https://p1.example.com/v1"},
+			{ID: "p2", BaseURL: "https://p2.example.com/v1", Disabled: true},
+		},
+		Aliases: []config.Alias{
+			{Alias: "ok", Enabled: true, Targets: []config.Target{{Provider: "p1", Model: "up-1", Enabled: true}}},
+			{Alias: "no-route", Enabled: true, Targets: []config.Target{{Provider: "p2", Model: "up-2", Enabled: true}}},
+			{Alias: "alias-disabled", Enabled: false, Targets: []config.Target{{Provider: "p1", Model: "up-3", Enabled: true}}},
+		},
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/v1/models", nil)
+	req.Header.Set("Authorization", "Bearer olpx-local")
+	rr := httptest.NewRecorder()
+
+	srv.handleModels(rr, req)
+
+	if rr.Code != http.StatusOK {
+		t.Fatalf("status = %d, want %d", rr.Code, http.StatusOK)
+	}
+	if body := rr.Body.String(); !strings.Contains(body, `"id":"ok"`) {
+		t.Fatalf("models body = %q, want alias ok", body)
+	}
+	if body := rr.Body.String(); strings.Contains(body, `"id":"no-route"`) {
+		t.Fatalf("models body = %q, disabled-provider alias should be hidden", body)
+	}
+	if body := rr.Body.String(); strings.Contains(body, `"id":"alias-disabled"`) {
+		t.Fatalf("models body = %q, disabled alias should be hidden", body)
+	}
+}
+
 func TestReadFirstChunk(t *testing.T) {
 	t.Parallel()