memoryd: sync begins when Honcho is turned on, and conclusions are matched by peer

Co-Authored-By: ornith-1.5-35b-a3b <agent@wntrmute.dev>

crates/memoryd/tests/honcho_turns.rs

@@ -16,7 +16,7 @@ use std::cell::RefCell;
 use bxcore::{DataClass, LogRecord, SessionId, SessionStateReply, Timestamp};
 use logs::{assistant, write_log};
 use memoryd::honcho::decide::{NO_REPLY, NO_SPEAKER, SECRET_CLASS};
-use memoryd::honcho::ledger::{Action, Item, Ledger, Workspace};
+use memoryd::honcho::ledger::{Action, Item, Ledger, Record, Workspace};
 use memoryd::honcho::turns::{
     LEDGER, LOG_RUNBOOK, TurnSync, decidable, finished, log_path, read_log,
 };
@@ -39,7 +39,10 @@ impl World {
     fn new(tag: &str) -> World {
         let dir = TempDir::new(tag);
         std::fs::create_dir_all(dir.path().join("memory")).unwrap();
-        let ledger = Ledger::open(&dir.path().join("memory").join(LEDGER)).unwrap();
+        let mut ledger = Ledger::open(&dir.path().join("memory").join(LEDGER)).unwrap();
+        // Every ledger begins with when sync began (M5c-1 task 15), before these tests' turns.
+        let began = Timestamp::parse("2026-09-28T09:00:00.000Z").unwrap();
+        ledger.append(Record::Began { time: began }).unwrap();
         World {
             sync: TurnSync::new(ledger, "boxmaker0", &dir.path().join("sessions")),
             answer: RefCell::new(Ok(clean())),
@@ -283,7 +286,7 @@ fn nothing_undecided_asks_nothing() {
     w.updated("mm-a", 1);
     assert_eq!(*w.asked.borrow(), vec!["mm-a"]);
     let lines = std::fs::read_to_string(w.dir.path().join("memory").join(LEDGER)).unwrap();
-    assert_eq!(lines.lines().count(), 1);
+    assert_eq!(lines.lines().count(), 2, "the began line and one decision");
     // A restart reads the ledger through: nothing is decided twice.
     let ledger = Ledger::open(&w.dir.path().join("memory").join(LEDGER)).unwrap();
     w.sync = TurnSync::new(ledger, "boxmaker0", &w.dir.path().join("sessions"));
@@ -356,6 +359,8 @@ fn a_ledger_that_cannot_be_written_stops_the_walk() {
     let mut w = World::new("turns-ledger");
     w.log("mm-a", &[turns::finished(Some("kyle"))]);
     let ledger = w.dir.path().join("memory").join(LEDGER);
+    let kept = std::fs::read_to_string(&ledger).unwrap();
+    std::fs::remove_file(&ledger).unwrap();
     std::fs::create_dir(&ledger).unwrap();
     w.updated("mm-a", 1);
     let lines = w.lines.borrow().clone();
@@ -368,6 +373,7 @@ fn a_ledger_that_cannot_be_written_stops_the_walk() {
     }));
     assert_eq!(w.waiting(), vec![("mm-a".to_string(), 1)]);
     std::fs::remove_dir(&ledger).unwrap();
+    std::fs::write(&ledger, kept).unwrap();
     w.updated("mm-a", 1);
     assert_eq!(w.action("mm-a", 1), to(Workspace::Trusted, "kyle"));
 }