fix(registry/coder-labs/modules/codex): rename aibridge to aigateway in config, add pnpm/bun fallbacks

- Rename model_provider and [model_providers.] section from 'aibridge'
  to 'aigateway' across main.tf, install template, tests, and README.
  The API path and env var stay unchanged (protocol-level).
- Add pnpm and bun as fallback package managers for codex installation
  when npm is not available.

Author: Jay Kumar

registry/coder-labs/modules/codex/README.md

@@ -77,16 +77,16 @@ module "codex" {
 }
 ```
 
-When `enable_ai_gateway = true`, the module configures Codex to use the `aibridge` model provider in `config.toml` with the workspace owner's session token for authentication.
+When `enable_ai_gateway = true`, the module configures Codex to use the `aigateway` model provider in `config.toml` with the workspace owner's session token for authentication.
 
 > [!CAUTION]
 > `enable_ai_gateway = true` is mutually exclusive with `openai_api_key`. Setting both fails at plan time.
 
 > [!NOTE]
-> If you provide a custom `base_config_toml`, the module writes it verbatim and does not inject `model_provider = "aibridge"` automatically. Add it to your config yourself:
+> If you provide a custom `base_config_toml`, the module writes it verbatim and does not inject `model_provider = "aigateway"` automatically. Add it to your config yourself:
 >
 > ```toml
-> model_provider = "aibridge"
+> model_provider = "aigateway"
 > ```
 
 ### Advanced Configuration

registry/coder-labs/modules/codex/main.test.ts

@@ -314,9 +314,9 @@ describe("codex", async () => {
       id,
       "/home/coder/.codex/config.toml",
     );
-    expect(configToml).toContain('model_provider = "aibridge"');
+    expect(configToml).toContain('model_provider = "aigateway"');
     expect(configToml).toContain('model_reasoning_effort = "none"');
-    expect(configToml).toContain("[model_providers.aibridge]");
+    expect(configToml).toContain("[model_providers.aigateway]");
   });
 
   test("model-reasoning-effort-standalone", async () => {
@@ -367,7 +367,7 @@ describe("codex", async () => {
   test("ai-gateway-with-custom-base-config", async () => {
     const baseConfig = [
       'sandbox_mode = "danger-full-access"',
-      'model_provider = "aibridge"',
+      'model_provider = "aigateway"',
     ].join("\n");
     const { id, coderEnvVars, scripts } = await setup({
       moduleVariables: {
@@ -380,15 +380,15 @@ describe("codex", async () => {
       id,
       "/home/coder/.codex/config.toml",
     );
-    expect(configToml).toContain('model_provider = "aibridge"');
-    expect(configToml).toContain("[model_providers.aibridge]");
+    expect(configToml).toContain('model_provider = "aigateway"');
+    expect(configToml).toContain("[model_providers.aigateway]");
   });
 
   test("ai-gateway-custom-config-no-duplicate-provider", async () => {
     const baseConfig = [
-      'model_provider = "aibridge"',
+      'model_provider = "aigateway"',
       "",
-      "[model_providers.aibridge]",
+      "[model_providers.aigateway]",
       'name = "Custom AI Bridge"',
       'base_url = "https://custom.example.com"',
       'env_key = "CODER_AIBRIDGE_SESSION_TOKEN"',
@@ -405,7 +405,7 @@ describe("codex", async () => {
       id,
       "/home/coder/.codex/config.toml",
     );
-    const matches = configToml.match(/\[model_providers\.aibridge\]/g) || [];
+    const matches = configToml.match(/\[model_providers\.aigateway\]/g) || [];
     expect(matches.length).toBe(1);
     expect(configToml).toContain("Custom AI Bridge");
   });

registry/coder-labs/modules/codex/main.tf

@@ -68,7 +68,7 @@ variable "base_config_toml" {
     When empty, the module generates a minimal default:
 
       preferred_auth_method = "apikey"
-      # model_provider = "aibridge"           (sets the default profile, when enable_ai_gateway = true)
+      # model_provider = "aigateway"           (sets the default profile, when enable_ai_gateway = true)
       # model_reasoning_effort = "<value>"    (sets the reasoning effort, when model_reasoning_effort is set)
 
       [projects."<workdir>"]                  (when workdir is set)
@@ -117,7 +117,7 @@ resource "coder_env" "openai_api_key" {
 }
 
 # Authenticates the client against Coder's AI Gateway using the workspace
-# owner's session token. Referenced by config.toml model_providers.aibridge.
+# owner's session token. Referenced by config.toml model_providers.aigateway.
 resource "coder_env" "ai_gateway_session_token" {
   count    = var.enable_ai_gateway ? 1 : 0
   agent_id = var.agent_id
@@ -128,7 +128,7 @@ resource "coder_env" "ai_gateway_session_token" {
 locals {
   workdir         = var.workdir != null ? trimsuffix(var.workdir, "/") : ""
   aibridge_config = <<-EOF
-  [model_providers.aibridge]
+  [model_providers.aigateway]
   name = "AI Gateway"
   base_url = "${data.coder_workspace.me.access_url}/api/v2/aibridge/openai/v1"
   env_key = "CODER_AIBRIDGE_SESSION_TOKEN"

registry/coder-labs/modules/codex/scripts/install.sh.tftpl

@@ -36,23 +36,29 @@ function install_codex() {
     . "$NVM_DIR/nvm.sh"
   fi
 
-  if ! command_exists npm; then
-    echo "Error: npm is required to install Codex. Install Node.js/npm first or set install_codex = false."
+  # Detect a package manager for global installs.
+  if command_exists npm; then
+    PKG_INSTALL="npm install -g"
+    if ! command_exists nvm; then
+      mkdir -p "$HOME/.npm-global"
+      npm config set prefix "$HOME/.npm-global"
+      export PATH="$HOME/.npm-global/bin:$PATH"
+    fi
+  elif command_exists pnpm; then
+    PKG_INSTALL="pnpm add -g"
+  elif command_exists bun; then
+    PKG_INSTALL="bun add -g"
+  else
+    echo "Error: npm, pnpm, or bun is required to install Codex. Install one of them first or set install_codex = false."
     exit 1
   fi
 
-  if ! command_exists nvm; then
-    mkdir -p "$HOME/.npm-global"
-    npm config set prefix "$HOME/.npm-global"
-    export PATH="$HOME/.npm-global/bin:$PATH"
-  fi
-
   printf "%s Installing Codex CLI\n" "$${BOLD}"
 
   if [ -n "$${ARG_CODEX_VERSION}" ]; then
-    npm install -g "@openai/codex@$${ARG_CODEX_VERSION}"
+    $PKG_INSTALL "@openai/codex@$${ARG_CODEX_VERSION}"
   else
-    npm install -g "@openai/codex"
+    $PKG_INSTALL "@openai/codex"
   fi
   printf "%s Installed Codex CLI: %s\n" "$${BOLD}" "$(codex --version)"
 }
@@ -62,7 +68,7 @@ function write_minimal_default_config() {
   local optional_config=""
 
   if [ "$${ARG_ENABLE_AI_GATEWAY}" = "true" ]; then
-    optional_config='model_provider = "aibridge"'
+    optional_config='model_provider = "aigateway"'
   fi
 
   if [ -n "$${ARG_MODEL_REASONING_EFFORT}" ]; then
@@ -102,7 +108,7 @@ function populate_config_toml() {
   fi
 
   if [ "$${ARG_ENABLE_AI_GATEWAY}" = "true" ] && [ -n "$${ARG_AIBRIDGE_CONFIG}" ]; then
-    if ! grep -q '\[model_providers\.aibridge\]' "$${config_path}" 2>/dev/null; then
+    if ! grep -q '\[model_providers\.aigateway\]' "$${config_path}" 2>/dev/null; then
       printf "Adding AI Gateway configuration\n"
       echo -e "\n$${ARG_AIBRIDGE_CONFIG}" >> "$${config_path}"
     else