fix: preserve stdin for permission prompts and handle count_tokens in mock

Three fixes for CI test failures:

1. Skip read_piped_stdin() when a CLI prompt is provided, so that stdin
   remains available for interactive permission approval prompts. Previously
   read_piped_stdin consumed all of stdin (including the "y" answer) before
   the permission prompter could read it.

2. Handle /v1/messages/count_tokens in the mock Anthropic service with a
   stub JSON response instead of treating it as a scenario request. The
   client now makes preflight token-counting calls that were inflating the
   captured request count from 21 to 42.

3. Use workspace_fingerprint in the resume_latest integration test so
   session files are written to the correct fingerprinted subdirectory
   that SessionStore::from_cwd expects.

https://claude.ai/code/session_01HZSVJyyV6aweGbT8YkN6nY

Author: claude

rust/crates/mock-anthropic-service/src/lib.rs

@@ -144,6 +144,20 @@ async fn handle_connection(
     requests: Arc<Mutex<Vec<CapturedRequest>>>,
 ) -> io::Result<()> {
     let (method, path, headers, raw_body) = read_http_request(&mut socket).await?;
+
+    // Respond to count_tokens requests with a stub JSON response without
+    // recording them — they are ancillary preflight calls, not scenario traffic.
+    if path.ends_with("/count_tokens") {
+        let body = r#"{"input_tokens":100}"#;
+        let response = format!(
+            "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{}",
+            body.len(),
+            body,
+        );
+        socket.write_all(response.as_bytes()).await?;
+        return Ok(());
+    }
+
     let request: MessageRequest = serde_json::from_str(&raw_body)
         .map_err(|error| io::Error::new(io::ErrorKind::InvalidData, error.to_string()))?;
     let scenario = detect_scenario(&request)

rust/crates/rusty-claude-cli/src/main.rs

@@ -205,7 +205,13 @@ fn run() -> Result<(), Box<dyn std::error::Error>> {
             base_commit,
         } => {
             run_stale_base_preflight(base_commit.as_deref());
-            let stdin_context = read_piped_stdin();
+            // Only read piped stdin when no CLI prompt was given, so that
+            // stdin remains available for interactive permission prompts.
+            let stdin_context = if prompt.is_empty() {
+                read_piped_stdin()
+            } else {
+                None
+            };
             let effective_prompt = merge_prompt_with_stdin(&prompt, stdin_context.as_deref());
             LiveCli::new(model, true, allowed_tools, permission_mode)?.run_turn_with_output(
                 &effective_prompt,

rust/crates/rusty-claude-cli/tests/resume_slash_commands.rs

@@ -180,7 +180,11 @@ fn resume_latest_restores_the_most_recent_managed_session() {
     // given
     let temp_dir = unique_temp_dir("resume-latest");
     let project_dir = temp_dir.join("project");
-    let sessions_dir = project_dir.join(".claw").join("sessions");
+    let fingerprint = runtime::session_control::workspace_fingerprint(&project_dir);
+    let sessions_dir = project_dir
+        .join(".claw")
+        .join("sessions")
+        .join(&fingerprint);
     fs::create_dir_all(&sessions_dir).expect("sessions dir should exist");
 
     let older_path = sessions_dir.join("session-older.jsonl");