v2.1.0 — Source it. Render it. Prove it.

v2.1.0 — Source it. Render it. Prove it.

IPCC visual fidelity now has reference data behind it.

This release adds a source-data regression layer built directly from pinned
official IPCC AR6 WGI repositories.

Reference gallery

Four distinct AR6 WGI figure families are now reproducible from source:

• Chapter 2 Figure 2.3 — paleo CO₂ proxies + uncertainty
• Chapter 3 Figure 3.2b — scatter + fitted relationship
• Chapter 6 Figure 6.18 source — historical + scenario CH₄ emissions
• Chapter 10 Figure 10.20b — Mediterranean station map

Each reference records:

• immutable upstream Git commit
• physical figure dimensions
• 350 ppi output
• output SHA256
• machine-readable provenance

Fidelity regression

The reference workflow now rebuilds the gallery and verifies that committed
outputs do not drift.

CI validates:

• source-data retrieval
• figure generation
• 90 / 180 mm delivery geometry
• output pixel dimensions
• SHA256 manifest
• committed reference consistency

CI is read-only: GitHub Actions validates the repository but does not write
commits back to it.

Project surface

README and repository structure were tightened around the actual execution model:

evidence → tokens → archetypes → render → audit → reference

IPCC style is not a Matplotlib theme.

It is a visual grammar with evidence behind it.