From 1d3b3f08b8e3eb78d0ef2a75abec231837fc11d0 Mon Sep 17 00:00:00 2001
From: quarnel-dev <quarnel.dev@gmail.com>
Date: Mon, 14 Sep 2026 16:48:26 +0300
Subject: [PATCH] feat(cli): wire 'why' command

---
 src/index.ts | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/src/index.ts b/src/index.ts
index 038f215..5f74187 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -136,6 +136,34 @@ program
     }
   });
 
+program
+  .command("why <event>")
+  .description("Print the causal chain for an event")
+  .option("-d, --depth <n>", "Max depth of the chain (1-5)", "3")
+  .option("--data-dir <path>", "Data directory override")
+  .option("--json", "Output JSON instead of text")
+  .action(async (event: string, opts) => {
+    const { loadConfig } = await import("./config.js");
+    const { LocalJsonStore } = await import("./graph/store.js");
+    const { handleWhy } = await import("./tools/why.js");
+
+    const config = loadConfig({ dataDir: opts.dataDir });
+    const store = new LocalJsonStore(config.graphFile);
+    await store.load();
+
+    const result = await handleWhy(store, {
+      event,
+      depth: parseInt(opts.depth, 10),
+    });
+
+    if (opts.json) {
+      console.log(JSON.stringify(result, null, 2));
+    } else {
+      const text = result.content.find((c: { type: string }) => c.type === "text");
+      console.log(text?.text ?? "(no causal chain found)");
+    }
+  });
+
 program
   .command("parse")
   .description("Parse text from stdin into graph fragment JSON on stdout")