Karel
2 programs
Added 2026-02-22T00:00:00Z
Agent: claude-codeModel: claude-sonnet-4-6WebSearch: enabled
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Aliases: Karel the Robot, Karel J. Robot, Karel (programming language)
Provenance: commit 96fdb72fb3 · authored 2026-02-22T22:03:11+01:00 · agent claude-code · model claude-sonnet-4-6
Merged records (3)
Sources describe this language in separate records, kept as they are. They were
joined by explicit decisions in data/curated/pl_links.csv
(concept concept/repo/Karel); names of merged pages are listed as aliases above.
- Karel
repo/Karel· this page · primary · sources: llm-campaign · evidenceL-a2144f5490same_asrepo/Karel (programming language): accepted (generic-qualifier, claude-opus-5-5, 2026-09-30) — Two LLM-campaign records for the same language (same Wikipedia evidence). - karel
pl/karel· record without its own page · sources: pldb · Wikipedia · Q204693 · PLDBL-6e79f4f7f9same_asrepo/Karel (programming language): accepted (generic-qualifier, claude-opus-5-5, 2026-09-30) - Karel (programming language)
repo/Karel (programming language)· had its own page, merged here · sources: llm-campaign · evidenceL-6e79f4f7f9same_aspl/karel: accepted (generic-qualifier, claude-opus-5-5, 2026-09-30)L-a2144f5490same_asrepo/Karel: accepted (generic-qualifier, claude-opus-5-5, 2026-09-30) — Two LLM-campaign records for the same language (same Wikipedia evidence).
Sources mentioning this language
4 sources · pl_id:
pl/karelWikipedia infobox ↗
Pulled from the
wikimedia/structured-wikipedia
snapshot — see data/raw/wikipedia_pl_facts.*.jsonl and
pl_fact.csv for the long-table provenance.
| Paradigms | procedural |
|---|---|
| Designed by | Richard E. Pattis |
| First appeared | 1981 |
| Influenced by | Pascal |
| Homepage | https://xkarel.sourceforge.net/ |
Related languages
Real programs from Software Heritage
No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)
Programs collected by LLM agents experimental · unverified
Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. Prefer the programs archived by Software Heritage above. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.
Exit Box
Provenance: commit 96fdb72fb3 · authored 2026-02-22T22:03:11+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch enabled
BEGIN
WHILE not-facing-west DO turnleft
WHILE front-is-clear DO move
turnleft turnleft turnleft
WHILE front-is-clear DO move
turnleft turnleft turnleft
WHILE left-is-blocked DO move
turnleft move move
WHILE not-next-to-a-beeper DO move
pickbeeper turnleft move move
putbeeper move
turnoff
END
Define turnright and move
Provenance: commit 96fdb72fb3 · authored 2026-02-22T22:03:11+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch enabled
BEGINNING-OF-PROGRAM
DEFINE-NEW-INSTRUCTION turnright AS
ITERATE 3 TIMES
turnleft;
END
BEGINNING-OF-EXECUTION
move;
turnright;
move;
turnoff;
END-OF-EXECUTION
END-OF-PROGRAM