.co2
1 claimant
0 primary
0 secondary
SWH popularity
Distinct files in the full Software Heritage archive (2026-06-04 export), dated by first appearance, following Desmazières, Di Cosmo, Lorentz (MSR 2025). Case-aggregated. citation.
5.5K
total files
619
first seen 2021–2025 (11.3%)
2018
median year (half its files since)
Case variants in archive: .co2 (5.0K), .CO2 (501), .Co2 (5) — aggregated above.
Attribution status
This extension is attributed to Carbon — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim △ Wikidata · secondary ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.co2 among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Carbon | wikidata | deprecated |
SWH-mined examples (0)
No archived examples for .co2 in our local mirror yet.