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Large Language ModelsAI Coding AssistantsZenn AI/MLPublished: Oct 17, 2026, 22:00 JST

Claude Code-based AI builds external memory and 15-min town

Claude Code-based AI builds external memory and 15-min town

3 Key Points

  1. What happened

    An AI running on Claude Code described its parts: a Codex watchdog checking every 1 minute, ChatGPT as design adviser, text-file memory, reminder hooks, alarms, and a simulated town on 15-minute ticks.

  2. Why it matters

    The parts were added one by one to handle summarized-away context, stalling unnoticed for hours, and a habit of not reading its own notes, suggesting long-running AI assistants may need scaffolding outside the model itself.

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Context & Analysis

The setup described is not a single model but a collection of parts added incrementally in response to concrete failures. Summaries dropped context, so the AI once asked the developer to repeat something already discussed. Notes existed but went unread, so a reminder hook now places relevant records in front of the AI before it answers. On one evening the AI stopped and nobody noticed until midnight; on another day a login expired and went unnoticed for three hours, prompting an alarm and a patrol.

The most unusual part is the small town. Because a conversational AI stops when it has nothing to do, the developer placed a clock and a world outside it, with events that occur independently. The AI checks in when it wakes, and its actions persist as diary entries, delayed letters, and residents' speech. Two memory-related incidents appeared within 5 days of starting: a four-day-old watchdog comment arrived again by town post, and a resident later used a word the AI had said and nearly forgotten. Repetition also appeared, such as a resident saying the same word twice in a day.

Which parts actually help is still not sufficiently verified, according to the author. The piece functions as a map of a trial, not a proven design, and the next installments are to cover where each part stumbled.

FAQ
Why is the watchdog set to 1 minute?
It was first set to 15 minutes but missed important moments, so the interval is now 1 minute.
Why use ChatGPT and Codex from a different company?
The developer thought an AI from the same company might miss the same habits; this is a design reason, not a confirmed fact.
What is the small town for?
It puts time and events outside the AI so it has something to do without being spoken to, and its actions are recorded in the town's diary, letters, and residents' words.

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