fix(compaction): restore context and todos before continue

src/plugin/tool-execute-before.test.ts

@@ -88,6 +88,42 @@ describe("createToolExecuteBeforeHandler", () => {
     expect(called).toBe(false)
   })
 
+  test("runs compaction todo preserver before hook for todowrite", async () => {
+    //#given
+    let called = false
+    const ctx = {
+      client: {
+        session: {
+          messages: async () => ({ data: [] }),
+        },
+      },
+    }
+    const preservedTodos = [
+      { content: "Preserved detailed task", status: "pending", priority: "high" },
+    ]
+    const hooks = {
+      compactionTodoPreserver: {
+        "tool.execute.before": async (
+          input: { tool: string; sessionID: string; callID: string },
+          output: { args: Record<string, unknown> },
+        ) => {
+          called = true
+          expect(input.tool).toBe("todowrite")
+          output.args.todos = preservedTodos
+        },
+      },
+    }
+    const handler = createToolExecuteBeforeHandler({ ctx, hooks })
+    const output = { args: { todos: [] } as Record<string, unknown> }
+
+    //#when
+    await handler({ tool: "todowrite", sessionID: "ses_compact", callID: "call_todo" }, output)
+
+    //#then
+    expect(called).toBe(true)
+    expect(output.args.todos).toBe(preservedTodos)
+  })
+
   describe("task tool subagent_type normalization", () => {
     const emptyHooks = {}
 

src/plugin/tool-execute-before.ts

@@ -77,6 +77,7 @@ export function createToolExecuteBeforeHandler(args: {
       await hooks.prometheusMdOnly?.["tool.execute.before"]?.(input, output)
     await hooks.sisyphusJuniorNotepad?.["tool.execute.before"]?.(input, output)
     await hooks.atlasHook?.["tool.execute.before"]?.(input, output)
+    await hooks.compactionTodoPreserver?.["tool.execute.before"]?.(input, output)
     await hooks.teamToolGating?.["tool.execute.before"]?.(input, output)
 
     const normalizedToolName = input.tool.toLowerCase()