huskies: merge 1218 story Remembered/sticky permission approvals so constrained agents stop re-prompting for the same action class

server/src/worktree/mod.rs

@@ -40,10 +40,23 @@ pub fn worktree_path(project_root: &Path, story_id: &str) -> PathBuf {
 
 /// Write a `.mcp.json` file in the given directory pointing to the huskies
 /// HTTP MCP endpoint at the given port.
-pub fn write_mcp_json(dir: &Path, port: u16) -> Result<(), String> {
-    let content = format!(
-        "{{\n  \"mcpServers\": {{\n    \"huskies\": {{\n      \"type\": \"http\",\n      \"url\": \"http://localhost:{port}/mcp\"\n    }}\n  }}\n}}\n"
-    );
+///
+/// Embeds an `X-Huskies-Session` header set to `story_id` so the server can
+/// scope remembered permission approvals to this worktree's agent session
+/// (see `http::mcp::session`) without affecting other stories' agents.
+pub fn write_mcp_json(dir: &Path, port: u16, story_id: &str) -> Result<(), String> {
+    let value = serde_json::json!({
+        "mcpServers": {
+            "huskies": {
+                "type": "http",
+                "url": format!("http://localhost:{port}/mcp"),
+                "headers": { "X-Huskies-Session": story_id }
+            }
+        }
+    });
+    let content = serde_json::to_string_pretty(&value)
+        .map_err(|e| format!("Serialize .mcp.json: {e}"))?
+        + "\n";
     std::fs::write(dir.join(".mcp.json"), content).map_err(|e| format!("Write .mcp.json: {e}"))
 }
 
@@ -91,7 +104,7 @@ mod tests {
     #[test]
     fn write_mcp_json_uses_given_port() {
         let tmp = TempDir::new().unwrap();
-        write_mcp_json(tmp.path(), 4242).unwrap();
+        write_mcp_json(tmp.path(), 4242, "1218").unwrap();
         let content = std::fs::read_to_string(tmp.path().join(".mcp.json")).unwrap();
         assert!(content.contains("http://localhost:4242/mcp"));
     }
@@ -99,11 +112,23 @@ mod tests {
     #[test]
     fn write_mcp_json_default_port() {
         let tmp = TempDir::new().unwrap();
-        write_mcp_json(tmp.path(), 3001).unwrap();
+        write_mcp_json(tmp.path(), 3001, "1218").unwrap();
         let content = std::fs::read_to_string(tmp.path().join(".mcp.json")).unwrap();
         assert!(content.contains("http://localhost:3001/mcp"));
     }
 
+    #[test]
+    fn write_mcp_json_embeds_session_header_with_story_id() {
+        let tmp = TempDir::new().unwrap();
+        write_mcp_json(tmp.path(), 3001, "42_story_test").unwrap();
+        let content = std::fs::read_to_string(tmp.path().join(".mcp.json")).unwrap();
+        let parsed: serde_json::Value = serde_json::from_str(&content).unwrap();
+        assert_eq!(
+            parsed["mcpServers"]["huskies"]["headers"]["X-Huskies-Session"],
+            "42_story_test"
+        );
+    }
+
     #[test]
     fn worktree_path_is_inside_project() {
         let project_root = Path::new("/home/user/my-project");