Source snapshot — Planetary Boundaries story

The story consumes an already-published dataset. These files are a dated snapshot so the story's charts stay reproducible if the upstream dataset changes.

Source: datasets/climate-and-environment/planetary-boundaries (published at https://datahub.io/climate-and-environment/planetary-boundaries)
Retrieved: 2026-09-05, from https://github.com/datasets/climate-and-environment/tree/main/planetary-boundaries
Licence: CC-BY-4.0 (as declared by the source dataset)
Underlying science: Steffen et al. 2015 (Science) and Richardson et al. 2023 (Science Advances); temporal-evolution series compiled by Bastien Gauthier (BastienGauthier/planetary-flag).

Files:

File	What it is
`boundaries.csv`	One row per indicator (12 sub-indicators across 9 boundaries): boundary value, zone of uncertainty, current value + year, whether exceeded.
`boundary-evolution.csv`	Long time series per indicator, pre-industrial (1850, some to year 0) → 2025.
`source-datapackage.json`	The source dataset's `datapackage.json`, as retrieved.

This is not a re-wrangle — no build.ts here. If this becomes a DataPressr dataset in its own right, that's separate work.