menu bar: herdr-style colored state glyphs; tmux segment before the clock

the design panel's monochrome template rendering made every row look
alike; restore herdr's agent-panel visual language - green ready, yellow
working, red blocked, filled when unseen in the queue. the tmux segment
moves left of the clock so it is visible at a glance; the status item
logs what it observes for diagnosis.

1 files changed, 45 insertions, 0 deletions

diff --git a/crates/dinggerd/src/integrations.rs b/crates/dinggerd/src/integrations.rs
new file mode 100644
index 0000000..a6378d1
--- /dev/null
+++ b/crates/dinggerd/src/integrations.rs
@@ -0,0 +1,45 @@
+//! Agent integrations: hook extensions that let agents report their own
+//! state (herdr's integration model), so detection does not rely on screen
+//! scraping for the agents that support it.
+
+use std::path::PathBuf;
+
+use detect_core::Agent;
+
+/// The embedded pi extension, adapted from herdr's `herdr-agent-state.ts`
+/// (Apache-2.0, Copyright herdr contributors).
+const PI_EXTENSION: &str = include_str!("../assets/pi/pi-agent-state.ts");
+
+fn pi_extension_dir() -> Result<PathBuf, String> {
+    let base = std::env::var_os("PI_CODING_AGENT_DIR")
+        .map(PathBuf::from)
+        .or_else(|| std::env::var_os("HOME").map(|home| PathBuf::from(home).join(".pi").join("agent")))
+        .ok_or("cannot determine pi agent dir (no HOME)")?;
+    Ok(base.join("extensions"))
+}
+
+/// Install the integration for one agent. Only pi has an integration today.
+pub fn install(agent: &str) -> Result<(), String> {
+    let parsed = detect_core::parse_agent_label(agent)
+        .ok_or_else(|| format!("unknown agent: {agent}"))?;
+    match parsed {
+        Agent::Pi => install_pi(),
+        other => Err(format!(
+            "no hook integration for {} yet — screen detection is used",
+            detect_core::agent_label(other)
+        )),
+    }
+}
+
+fn install_pi() -> Result<(), String> {
+    let dir = pi_extension_dir()?;
+    std::fs::create_dir_all(&dir).map_err(|err| format!("mkdir failed: {err}"))?;
+    let path = dir.join("dingger-agent-state.ts");
+    std::fs::write(&path, PI_EXTENSION).map_err(|err| format!("write failed: {err}"))?;
+    tracing::info!(path = %path.display(), "installed pi extension");
+    println!(
+        "installed {} — new pi sessions report their state directly;\nrestart running pi agents (or reload them) to pick it up",
+        path.display()
+    );
+    Ok(())
+}