build: bundle shared ai config into installer

automation/README.md

@@ -161,7 +161,10 @@ claude -p "Return JSON: {\"test\": true}"
 # Check git config
 git config --list | grep cascadingdev
 
-# Try environment variable
+# Inspect shared config (repo-wide defaults)
+cat config/ai.yml
+
+# Try environment variable override
 CDEV_AI_COMMAND="claude -p '{prompt}'" git commit -m "test"
 ```
 

docs/AUTOMATION.md

@@ -71,7 +71,12 @@ READY: 0 • CHANGES: 2 • REJECT: 0
 
 ### Requirements
 
-Phase 2 supports multiple AI providers via CLI commands or direct API:
+Phase 2 supports multiple AI providers via CLI commands or direct API. The
+preferred way to set defaults is editing `config/ai.yml` (copied into every
+generated project). The `runner.command_chain` list is evaluated left → right
+until a provider succeeds, and the `ramble` section controls the GUI defaults.
+Environment variables or CLI flags still override the shared config for ad-hoc
+runs:
 
 **Option 1: CLI-based (Recommended)**
 ```bash
@@ -82,7 +87,8 @@ Phase 2 supports multiple AI providers via CLI commands or direct API:
 git config cascadingdev.aiprovider "claude-cli"
 git config cascadingdev.aicommand "claude -p '{prompt}'"
 
-# Or via environment variables (session)
+# Or via environment variables (session). These temporarily override
+# `config/ai.yml` for the current shell.
 export CDEV_AI_PROVIDER="claude-cli"
 export CDEV_AI_COMMAND="claude -p '{prompt}'"
 ```

src/cascadingdev/setup_project.py

@@ -322,6 +322,11 @@ def copy_install_assets_to_target(target: Path):
     copy_if_exists(INSTALL_ROOT / "assets" / "templates" / "USER_GUIDE.md",
                                            target / "USER_GUIDE.md")
 
+    # Shared AI configuration
+    ai_cfg_src = INSTALL_ROOT / "config" / "ai.yml"
+    if ai_cfg_src.exists():
+        copy_if_missing(ai_cfg_src, target / "config" / "ai.yml")
+
     # Copy shipped templates (preferred source of truth)
     tmpl_src = INSTALL_ROOT / "assets" / "templates"
     if tmpl_src.exists():

tools/build_installer.py

@@ -27,6 +27,7 @@ def main():
         "feature_request.md",
         "feature.discussion.md",
         "feature.discussion.sum.md",
+        "design.discussion.md",
         "design_doc.md",
         "USER_GUIDE.md",
         "root_gitignore",
@@ -41,6 +42,11 @@ def main():
     copy_tree(ROOT / "assets" / "templates" / "process", BUNDLE / "assets" / "templates" / "process")
     copy_tree(ROOT / "assets" / "templates" / "rules", BUNDLE / "assets" / "templates" / "rules")
 
+    # copy shared AI configuration
+    config_src = ROOT / "config"
+    if config_src.exists():
+        copy_tree(config_src, BUNDLE / "config")
+
     # copy automation directory (workflow.py and future orchestration scripts)
     automation_src = ROOT / "automation"
     if automation_src.exists():