.cairo
2 claimants
2 primary
0 secondary
shared primary (2)
SWH popularity
From the SWH-MSR-ARV dataset (Desmazières, Di Cosmo, Lorentz, MSR 2025; file nb_extensions_alphanum.csv) — one row per (ext, year) in the full SWH archive. Case-aggregated. citation.
63.6K
total occurrences
23.6K
since 2019 (37.2%)
2003–2023
years active
Case variants in archive: .cairo (63.6K), .Cairo (13), .CAIRO (1) — aggregated above.
Attribution status
This extension is attributed to Cairo; Cairo Zero as primary by 2 authoritative claims.
Authoritative sources: ✓ Linguist ✗ Pygments · no claim ✗ Wikidata · no claim ✗ Wikipedia · no claim
Claimants (2)
Languages that list
.cairo among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Cairo | linguist | primary |
| Cairo Zero | linguist | primary |
Disambiguation rules (2)
Linguist heuristics that decide, by content, which language a
.cairo file actually is.| Rule | Predicts | Kind | Predicates (truncated) |
|---|---|---|---|
h/linguist/.cairo/0 | Cairo Zero | predicates | [{"kind": "any", "regexes": ["(^(\\s*)%lang(\\s+)([A-Za-z0-9_]+))|(^(\\s*)%builtins(\\s+)([A-Za-z0-9_]+\\s*)*$)|(^(\\s*)from(\\s+)starkware\\.(cairo|starknet)\\.([A-Za-z0-9_.\\s]+?)import)|(,\\s*ap\\+ |
h/linguist/.cairo/1 | Cairo | default | [] |
SWH-mined examples (0)
No archived examples for .cairo in our local mirror yet.