{
  "_doc": "Chat-mode end-to-end fixture. 22 messages across 3 topics + a multi-user handoff. Run with EVEROS_MEMORIZE__MODE=chat. Expected boundary detector cuts ~3-4 cells (Python bug → weekend plans → cross-team meeting).",
  "session_id_hint": "e2e_chat",
  "messages": [
    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747396800000, "content": "I'm getting a weird KeyError on a dict comprehension when the source list has None entries. The traceback points at the dict literal, not the comprehension itself."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747396830000, "content": "Can you share a minimal repro? Something like the comprehension expression plus 2-3 sample input items. I want to see whether the None is on the key side or the value side."},
    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747396890000, "content": "Sure: `{r['id']: r['name'] for r in rows}` where rows comes from a left-join and sometimes the right side returns None. So r is None for those rows."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747396920000, "content": "Got it. The None is the row itself, not a field. `None['id']` raises TypeError actually, but if you preprocess the rows to dicts upstream, the missing key on a partial dict would be KeyError. Either way, filter before the comprehension: `{r['id']: r['name'] for r in rows if r is not None and 'id' in r}`."},
    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747396980000, "content": "That worked, thanks. Also occasionally the SQL itself wraps the row in a tuple instead of dict — pyodbc behaviour. Got bitten by it last quarter too."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747397010000, "content": "pyodbc returns Row objects by default; you'd need `cursor.execute(...).fetchall()` then iterate. Or set `cursor.row_factory = lambda c, r: dict(zip([col[0] for col in c.description], r))` to normalise upstream."},

    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747400400000, "content": "Switching topics — any weekend plans? I'm thinking of trying the new ramen place on Carmine Street, supposedly the tonkotsu is decent."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747400430000, "content": "Tonkotsu sounds good. If you go Saturday before 1pm you'll skip the queue. There's also a coffee place two doors down that does decent cold brew if you want a pre-meal stop."},
    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747400490000, "content": "Cold brew yes. Bob mentioned wanting to come too, do you think the ramen place takes reservations for three?"},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747400520000, "content": "Their site says walk-in only on weekends. For three people the wait is usually 25-40 minutes around noon — manageable but worth knowing."},
    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747400580000, "content": "OK we'll show up at 11:30 then. Will send Bob the address."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747400610000, "content": "Sensible. Reminder it's cash-only for the first 6 months apparently — saw that on a Reddit thread last week."},

    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747407600000, "content": "One more thing — the Q3 revenue review is next Thursday at 2pm, who from engineering needs to attend? I want to make sure platform team is represented since we're presenting the infra cost reductions."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747407630000, "content": "Standard attendees are eng director + relevant TL. For platform cost reductions, your eng lead Carol should be there since she owns the runbook. Add Dan as a backup in case Carol's on PTO."},
    {"sender_id": "u_alice", "sender_name": "Alice",     "role": "user",      "timestamp": 1747407690000, "content": "Good call. Carol mentioned PTO that week actually. Let me ping Dan to confirm he can do the slides handoff."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747407720000, "content": "If Dan has bandwidth, also ask him to pre-share the deck Monday so finance has time to review the cost numbers before the meeting. Saves a lot of meeting time clarifying figures."},

    {"sender_id": "u_bob", "sender_name": "Bob",         "role": "user",      "timestamp": 1747411200000, "content": "Hey, Alice forwarded me about the ramen plan and the Thursday meeting. I can do both but the Thursday slot conflicts with the SRE oncall handoff at 1:45 — anyone we can swap with?"},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747411230000, "content": "Erin usually does the Wednesday → Thursday handoff for SRE. She owes you one from last cycle. Ask her to take the 1:45 slot and you can ack the comms async at 1:30."},
    {"sender_id": "u_bob", "sender_name": "Bob",         "role": "user",      "timestamp": 1747411290000, "content": "Erin's good. I'll ping her on Slack today. About the ramen — Alice said 11:30 Saturday, that works for me, walking distance from my place."},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747411320000, "content": "Great. Just remind Alice it's cash-only for now — she'll forget otherwise based on past experience."},
    {"sender_id": "u_bob", "sender_name": "Bob",         "role": "user",      "timestamp": 1747411380000, "content": "Ha, true. I'll grab some cash on the way. Also can you remind me about the Q3 revenue deck — when does it need to be done by, EOD Tuesday?"},
    {"sender_id": "assistant", "sender_name": "Bot",     "role": "assistant", "timestamp": 1747411410000, "content": "Yes — Dan agreed to pre-share Monday, so practical deadline is EOD Tuesday for finance to review Wednesday. After Wednesday review they may ask for last-minute number tweaks; build slack into Thursday morning for that."}
  ]
}