Fabledex

Setup

1. 01

   Install CLIProxyAPI.

   TerminalCopy

   brew install cliproxyapi

2. 02

   Generate a key. Paste it into the config.

   Generate keyCopy

   openssl rand -hex 32

   /opt/homebrew/etc/cliproxyapi.confCopy

   host: "127.0.0.1"
   port: 8317
   
   remote-management:
     allow-remote: false
     secret-key: ""
     disable-control-panel: true
   
   auth-dir: "~/.cli-proxy-api"
   
   api-keys:
     - "PASTE_YOUR_RANDOM_KEY_HERE"

3. 03

   Log in. Lock the files. Start the proxy.

   TerminalCopy

   /opt/homebrew/bin/cliproxyapi -config /opt/homebrew/etc/cliproxyapi.conf -claude-login
   
   find "$HOME/.cli-proxy-api" -maxdepth 1 -type f -name '*.json' -exec chmod 600 {} +
   
   brew services start cliproxyapi

4. 04

   Create the key helper.

   TerminalCopy

   mkdir -p "$HOME/.local/bin"

   ~/.local/bin/cliproxy-api-keyCopy

   #!/bin/zsh
   set -euo pipefail
   
   config=/opt/homebrew/etc/cliproxyapi.conf
   key=$(
     awk '
       /^api-keys:/ { in_keys = 1; next }
       in_keys && /^[[:space:]]*-/ {
         sub(/^[[:space:]]*-[[:space:]]*/, "")
         gsub(/^"|"$/, "")
         print
         exit
       }
       in_keys && /^[^[:space:]]/ { exit }
     ' "$config"
   )
   
   if [[ -z "$key" ]]; then
     print -u2 "No CLIProxyAPI key found in $config"
     exit 1
   fi
   
   print -r -- "$key"

   TerminalCopy

   chmod 700 "$HOME/.local/bin/cliproxy-api-key"

5. 05

   Create the model catalog.

   TerminalCopy

   mkdir -p "$HOME/.codex"
   
   jq '{
     models: [
       .models[]
       | select(.slug == "gpt-5.4")
       | .slug = "claude-fable-5"
       | .display_name = "Fabledex"
       | .description = "Claude Fable 5 through local CLIProxyAPI."
       | .priority = 1
       | .context_window = 1000000
       | .max_context_window = 1000000
       | .effective_context_window_percent = 95
       | .auto_compact_token_limit = 900000
       | .default_reasoning_level = "xhigh"
       | .default_verbosity = null
       | .support_verbosity = false
       | .input_modalities = ["text"]
       | .supports_image_detail_original = false
       | .shell_type = "default"
       | .apply_patch_tool_type = null
       | .supports_parallel_tool_calls = false
       | .supports_search_tool = false
       | .web_search_tool_type = "text"
       | .service_tiers = []
       | .additional_speed_tiers = []
       | .comp_hash = null
       | .include_skills_usage_instructions = false
     ]
   }' "$HOME/.codex/models_cache.json" > "$HOME/.codex/fabledex-model-catalog.json"

6. 06

   Add the provider and profile files.

   Append this to ~/.codex/config.toml. Replace /Users/YOUwith your full home path.

   ~/.codex/config.tomlCopy

   [model_providers.claude-subscription]
   name = "Claude subscription via local CLIProxyAPI"
   base_url = "http://127.0.0.1:8317/v1"
   wire_api = "responses"
   requires_openai_auth = false
   supports_websockets = false
   request_max_retries = 3
   stream_max_retries = 5
   stream_idle_timeout_ms = 1200000
   
   [model_providers.claude-subscription.auth]
   command = "/Users/YOU/.local/bin/cliproxy-api-key"
   refresh_interval_ms = 300000
   timeout_ms = 5000

   Create this separate profile file.

   ~/.codex/fabledex.config.tomlCopy

   model = "claude-fable-5"
   model_provider = "claude-subscription"
   model_reasoning_effort = "xhigh"
   model_context_window = 1000000
   model_auto_compact_token_limit = 900000
   model_catalog_json = "/Users/YOU/.codex/fabledex-model-catalog.json"

7. 07

   Launch Fabledex.

   CLI

   TerminalCopy

   codex --profile fabledex

   Codex Desktop

   Put these six lines at the top of ~/.codex/config.toml. Replace /Users/YOU with your full home path.

   Desktop modelCopy

   model = "claude-fable-5"
   model_provider = "claude-subscription"
   model_reasoning_effort = "xhigh"
   model_context_window = 1000000
   model_auto_compact_token_limit = 900000
   model_catalog_json = "/Users/YOU/.codex/fabledex-model-catalog.json"

   Quit and reopen Codex. Start a new task. Choose Custom · Extra High.

   Test promptCopy

   Reply with exactly FABLED_EX_OK