feat: add Letta Code detection and restore (#3107)

refs #3106

Co-authored-by: Cameron <cameron@pfiffer.org>

1 files changed, 26 insertions, 4 deletions

diff --git a/src/integration/mod.rs b/src/integration/mod.rs
index a40ad970..97163da5 100644
--- a/src/integration/mod.rs
+++ b/src/integration/mod.rs
@@ -10,17 +10,27 @@ mod targets;
 mod types;
 mod version;
 
-pub(crate) use actions::{install_target, uninstall_target};
+pub(crate) use actions::{
+    install_experimental_letta, install_target, uninstall_experimental_letta, uninstall_target,
+};
 #[cfg(test)]
 pub(crate) use env::integration_env_lock;
 pub(crate) use env::{
     apply_pane_base_env, HERDR_PANE_ID_ENV_VAR, HERDR_TAB_ID_ENV_VAR, HERDR_WORKSPACE_ID_ENV_VAR,
 };
 pub(crate) use registry::{
-    installed_integration_statuses, integration_recommendations, integration_target_label,
-    print_outdated_update_notice,
+    experimental_letta_integration_status, installed_integration_statuses,
+    integration_recommendations, integration_target_label, print_outdated_update_notice,
+};
+pub(crate) use types::{
+    ExperimentalIntegrationStatus, IntegrationRecommendation, IntegrationStatus,
+    IntegrationStatusKind,
 };
-pub(crate) use types::{IntegrationRecommendation, IntegrationStatus, IntegrationStatusKind};
+
+/// CLI labels for experimental integrations that are intentionally not part of
+/// the frozen client endpoint `IntegrationTarget` enum. Empty this list once the
+/// agent registry provides first-class target registration.
+pub(crate) const EXPERIMENTAL_INTEGRATION_TARGET_LABELS: &[&str] = &["letta"];
 
 const PI_EXTENSION_INSTALL_NAME: &str = "herdr-agent-state.ts";
 const PI_EXTENSION_ASSET: &str = include_str!("assets/pi/herdr-agent-state.ts");
@@ -207,6 +217,18 @@ const QWEN_HOOK_ASSET: &str = if cfg!(windows) {
 };
 const QWEN_INTEGRATION_VERSION: u32 = 1;
 const QWEN_HOOK_EVENTS: [(&str, &str); 1] = [("SessionStart", "session")];
+const LETTA_HOOK_INSTALL_NAME: &str = if cfg!(windows) {
+    "herdr-agent-session.ps1"
+} else {
+    "herdr-agent-session.sh"
+};
+const LETTA_HOOK_ASSET: &str = if cfg!(windows) {
+    include_str!("assets/letta/herdr-agent-session.ps1")
+} else {
+    include_str!("assets/letta/herdr-agent-session.sh")
+};
+const LETTA_INTEGRATION_VERSION: u32 = 1;
+const LETTA_HOOK_TIMEOUT_MS: u64 = 10_000;
 const QODERCLI_REMOVED_LIFECYCLE_HOOK_EVENTS: [(&str, &str); 12] = [
     ("SessionStart", "idle"),
     ("UserPromptSubmit", "working"),