.cw
1 claimant
1 primary
0 secondary
unambiguous primary
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.
10.1K
total files
3.7K
first seen 2021–2025 (36.5%)
2019
median year (half its files since)
Case variants in archive: .cw (10.0K), .CW (115), .Cw (2) — aggregated above.
Attribution status
This extension is attributed to Redcode as primary by 2 authoritative claims.
Claimants (2)
Languages that list
.cw among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Redcode | linguist | primary |
| Redcode | pygments | primary |
Wikidata says… (1)
File formats, image formats, audio codecs and other non-PL
entities that claim
.cw on Wikidata
(property P1195) or in the Wikipedia infobox.
Source: data/derived/external_extension_index.csv.
Click Use as new PL on any row to open the
Add-PL form pre-filled with that entry's name, Wikipedia/Wikidata
URL, and this extension — one submission creates the PL + claim.
| Format | Class (Wikidata P31) | Suggested label | MIME | Notes | Action |
|---|---|---|---|---|---|
| Redcode file format Q130618874 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .cw in our local mirror yet.