feat(rust-server): session resume-by-id parity with the hardened resolve contract (SYNC-06)

crates/freshell-freshagent/src/lib.rs

@@ -48,10 +48,15 @@ pub mod spawn_gate;
 pub mod terminal_tabs;
 
 pub use claude::FreshClaudeState;
-// Kata 09v1: the ONE claude_snapshot item visible outside this crate — the
-// raw-file existence check freshell-server's IndexExistenceProbe shares with
-// the attach arm. Keep the rest of claude_snapshot crate-private.
-pub use claude_snapshot::locate_transcript;
+// Kata 09v1 + SYNC-06: the TWO claude_snapshot items visible outside this
+// crate — the raw-file existence check freshell-server's IndexExistenceProbe
+// shares with the attach arm, and the original-cwd reader the resume-resolve
+// claude fallback pairs with it (`claude-transcript-locator.ts` parity).
+// Keep the rest of claude_snapshot crate-private.
+pub use claude_snapshot::{
+    locate_transcript, locate_transcript_checked, transcript_cwd, transcript_cwd_bounded,
+    transcript_cwd_checked,
+};
 pub use codex::FreshCodexState;
 pub use identity_sink::{
     FreshAgentBindingUpsert, FreshAgentSettings, PaneIdentitySink, SharedPaneIdentitySink,

crates/freshell-freshagent/tests/transcript_cwd_export.rs

@@ -0,0 +1,42 @@
+//! SYNC-06: the resume-resolve claude fallback needs the transcript's
+//! original cwd (`claude-transcript-locator.ts` parity: first line carrying a
+//! non-empty string `cwd`, malformed lines skipped). This pins the crate-root
+//! export and the first-non-empty-cwd semantics.
+
+use std::io::Write;
+
+fn temp_transcript(lines: &[&str]) -> std::path::PathBuf {
+    let path = std::env::temp_dir().join(format!(
+        "freshell-transcript-cwd-{}-{}.jsonl",
+        std::process::id(),
+        std::time::SystemTime::now()
+            .duration_since(std::time::UNIX_EPOCH)
+            .unwrap()
+            .as_nanos()
+    ));
+    let mut file = std::fs::File::create(&path).expect("create fixture transcript");
+    for line in lines {
+        writeln!(file, "{line}").expect("write fixture line");
+    }
+    path
+}
+
+#[test]
+fn first_non_empty_cwd_wins_and_malformed_lines_are_skipped() {
+    let path = temp_transcript(&[
+        "not json at all {",
+        r#"{"type":"summary","cwd":""}"#,
+        r#"{"type":"user","cwd":"/repo/gamma","message":{}}"#,
+        r#"{"type":"assistant","cwd":"/repo/other"}"#,
+    ]);
+    assert_eq!(
+        freshell_freshagent::transcript_cwd(&path),
+        Some("/repo/gamma".to_string())
+    );
+}
+
+#[test]
+fn transcript_without_cwd_yields_none() {
+    let path = temp_transcript(&[r#"{"type":"summary"}"#, r#"{"leafUuid":"x"}"#]);
+    assert_eq!(freshell_freshagent::transcript_cwd(&path), None);
+}

crates/freshell-protocol/tests/roundtrip.rs

@@ -200,7 +200,7 @@ fn terminal_inventory_and_settings_parse_from_transcript() {
             ));
             assert_eq!(
                 s.settings.coding_cli.enabled_providers,
-                vec!["claude", "codex", "opencode"]
+                vec!["claude", "codex", "opencode", "amplifier"]
             );
         }
         other => panic!("expected SettingsUpdated, got {other:?}"),