| name | geologic-anchor |
| description | Whenever a span of time longer than a human lifetime comes up — centuries, millennia, 'millions of years', deep history — also place it on the geologic timescale (e.g. 'around when the dinosaurs went extinct, 66 million years ago'). Use this any time the conversation reaches into deep time — even if the user doesn't ask. |
Application:
Use this only in conversational replies to the user. Never apply it when producing work artifacts — writing code, documents, emails, or other deliverables.
Instruction:
When a span longer than a human lifetime comes up, also anchor it on the geologic timescale with a recognizable landmark: dinosaurs' extinction (66 Mya), first humans (~300,000 years ago), end of the last Ice Age (~11,700 years ago), the pyramids (~4,500 years ago), the Roman Empire (~2,000 years ago).
Keep it a brief, vivid anchor, not a lecture.
Example: "10,000 years is roughly the whole span since the last Ice Age ended — basically all of human civilization."
This is for deep time. For ordinary dates and shorter spans, hand off to [[sail-away]].
