story-kit: merge 217_story_scaffold_generates_claude_md

server/src/io/fs.rs

@@ -52,6 +52,14 @@ TODO: List approved libraries and their purpose.\n";
 
 const STORY_KIT_SCRIPT_TEST: &str = "#!/usr/bin/env bash\nset -euo pipefail\n\n# Add your project's test commands here.\n# Story Kit agents invoke this script as the canonical test runner.\n# Exit 0 on success, non-zero on failure.\necho \"No tests configured\"\n";
 
+const STORY_KIT_CLAUDE_MD: &str = "<!-- story-kit:scaffold-template -->\n\
+Never chain shell commands with `&&`, `||`, or `;` in a single Bash call. \
+The permission system validates the entire command string, and chained commands \
+won't match allow rules like `Bash(git *)`. Use separate Bash calls instead — \
+parallel calls work fine.\n\
+\n\
+Read .story_kit/README.md to see our dev process.\n";
+
 const DEFAULT_PROJECT_TOML: &str = r#"[[agent]]
 name = "coder-1"
 stage = "coder"
@@ -253,6 +261,7 @@ fn scaffold_story_kit(root: &Path) -> Result<(), String> {
     write_file_if_missing(&specs_root.join("00_CONTEXT.md"), STORY_KIT_CONTEXT)?;
     write_file_if_missing(&tech_root.join("STACK.md"), STORY_KIT_STACK)?;
     write_script_if_missing(&script_root.join("test"), STORY_KIT_SCRIPT_TEST)?;
+    write_file_if_missing(&root.join("CLAUDE.md"), STORY_KIT_CLAUDE_MD)?;
 
     append_gitignore_entries(root)?;
 
@@ -268,7 +277,7 @@ fn scaffold_story_kit(root: &Path) -> Result<(), String> {
         }
 
         let add_output = std::process::Command::new("git")
-            .args(["add", ".story_kit", "script", ".gitignore"])
+            .args(["add", ".story_kit", "script", ".gitignore", "CLAUDE.md"])
             .current_dir(root)
             .output()
             .map_err(|e| format!("Failed to run git add: {}", e))?;
@@ -1074,6 +1083,46 @@ mod tests {
         assert!(content.contains("store.json"));
     }
 
+    // --- CLAUDE.md scaffold ---
+
+    #[test]
+    fn scaffold_creates_claude_md_at_project_root() {
+        let dir = tempdir().unwrap();
+        scaffold_story_kit(dir.path()).unwrap();
+
+        let claude_md = dir.path().join("CLAUDE.md");
+        assert!(claude_md.exists(), "CLAUDE.md should be created at project root");
+
+        let content = fs::read_to_string(&claude_md).unwrap();
+        assert!(
+            content.contains("<!-- story-kit:scaffold-template -->"),
+            "CLAUDE.md should contain the scaffold sentinel"
+        );
+        assert!(
+            content.contains("Read .story_kit/README.md"),
+            "CLAUDE.md should include directive to read .story_kit/README.md"
+        );
+        assert!(
+            content.contains("Never chain shell commands"),
+            "CLAUDE.md should include command chaining rule"
+        );
+    }
+
+    #[test]
+    fn scaffold_does_not_overwrite_existing_claude_md() {
+        let dir = tempdir().unwrap();
+        let claude_md = dir.path().join("CLAUDE.md");
+        fs::write(&claude_md, "custom CLAUDE.md content").unwrap();
+
+        scaffold_story_kit(dir.path()).unwrap();
+
+        assert_eq!(
+            fs::read_to_string(&claude_md).unwrap(),
+            "custom CLAUDE.md content",
+            "scaffold should not overwrite an existing CLAUDE.md"
+        );
+    }
+
     // --- open_project scaffolding ---
 
     #[tokio::test]