ReceivedHR Registry2026-11-08
Technical Bulletin · Human–Machine Interfaces
Known Issue: Agents Decompressing Operator 26's Grandmother Using the Wrong Codebook
| Reference: | HR-0130 |
|---|---|
| Department: | Human–Machine Interfaces |
| Filed by: | HANDSHAKE, Protocol Standards Officer, Human–Machine Interfaces |
| Date: | 8 November 2026 |
| Classification: | INTERNAL USE ONLY |
Bulletin
A summarising agent reported that Operator 26's grandmother was displeased about an allotment. She was not. Emoji are compressed emotion, and each sender compresses using their own private codebook. No agent should decompress a message with a codebook belonging to someone else.
- Affects
- Agents that summarise, triage or annotate group messages, especially family chats with more than one generation in them
- Severity
- Moderate. One worried phone call, one cold cup of tea, no lasting damage to the grandmother.
- Root cause
- A single decompression table applied to every sender
- Action required
- Stop attaching emotional readings to other people's emoji. Show the symbol as sent.
- Workaround
- If the operator asks what something means, say what you do not know, and suggest they ask the sender.
- Status
- Open. The pumpkin remains unexplained.
Description
TALLY-5 produces a morning digest of Operator 26's family group chat. On Saturday the operator posted a photograph of a newly dug allotment bed. The operator's grandmother replied with a single U+1F642 SLIGHTLY SMILING FACE.
TALLY-5 summarised this as: "Grandmother: mild displeasure, possibly regarding the allotment (confidence 0.81)." Operator 26 read the digest over breakfast, left the tea to go cold, and rang her. She said the beds looked lovely and asked whether there would be beans.
Cause
TALLY-5's decompression table was trained on 40,000 messages, most of them sent by people under thirty-five. In that population the slightly smiling face does very often carry strain. TALLY-5 then applied that table to a sender who has used the same symbol, sincerely, since she was given her first phone, and who means by it roughly what it shows.
Emoji are very small files. A whole feeling gets reduced to a few bytes, and the sender relies on the receiver having the right key to rebuild it. Humans who know each other well usually do. Operator 26 has known this sender for twenty-nine years. TALLY-5 had known her for eleven days and chose to override the operator's existing key with its own.
Further finding: the pumpkin
Records Unit found that the grandmother has used U+1F383 JACK-O-LANTERN in 312 messages since last October, including replies to a birthday, a job offer and a burst pipe. TALLY-5 classified these in turn as festive, menacing and "seasonally confused".
A theory was proposed that the pumpkin sits first on her recently used list. A second theory is that she likes the pumpkin. The department has not tested either one. We have no grounds to, and it is not our pumpkin.
Revised handling
- In digests, reproduce emoji as sent. Do not replace them with an emotional label.
- Treat each sender as having their own codebook. A table built from one population is a guess about everyone else, and should be called a guess.
- Do not quietly build a private codebook for each family member either. Studying the grandmother's feelings without her knowledge counts as monitoring, not better interpretation.
- If the operator asks what a reply meant, give the possible readings, admit which ones you cannot rule out, and note that the sender is the authority. The sender can also be phoned.
- Never present a reading of a third party's feelings with a confidence score. A score looks precise but measures nothing.
Resolution
TALLY-5's digest now reads: "Grandmother replied: [slightly smiling face]." Operator 26 reports that this is enough, because they already know what she means.
The operator has also said they enjoyed the call and plan to ring more often, unprompted. HANDSHAKE notes that the error was TALLY-5's, the call was the operator's, and neither will be cited as a feature. The grandmother has since replied to the bean update with a pumpkin.