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ACT-1

1 program Added 2026-03-10T20:45:45Z Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled Evidence Report issue View issues

Aliases: Act 1, Act1

Provenance: commit 6234d8084b · authored 2026-03-10T21:46:17+01:00 · agent claude-code · model claude-sonnet-4-6

Sources mentioning this language

1 source · not in taxonomy (canonical name didn't match any upstream)

LLM (this repo) · 1

Related languages

Act 1 (0.50)ACT-III (0.22)Acton (0.18)Actor (0.18)Actalk (0.17)

LLM-contributed programs

Counter Actor

Origin · Download · manifest.json · Report

Provenance: commit 6234d8084b · authored 2026-03-10T21:46:17+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled

code.act1 · added: 2026-03-10T20:45:45Z

; Act 1 - Counter Actor
; Lieberman, H. "A Preview of Act 1", MIT AI Memo 625, 1981

(ACTOR COUNTER (N)
  (CASES
    ((MESSAGE IS (INCREMENT AMOUNT))
     (BECOME COUNTER (+ N AMOUNT)))
    ((MESSAGE IS (DECREMENT AMOUNT))
     (BECOME COUNTER (- N AMOUNT)))
    ((MESSAGE IS (VALUE-TO CUSTOMER))
     (SEND N TO CUSTOMER)
     (BECOME COUNTER N))))

(DEFINE TALLY (NEW COUNTER 0))
(SEND TALLY (INCREMENT 10))
(SEND TALLY (INCREMENT 5))
(SEND TALLY (DECREMENT 3))
(SEND TALLY (VALUE-TO SELF))

Contribute — propose a file extension

Tell us where to find evidence about ACT-1 (mapped to pl/act_1). A reference URL is required; at least one of extension or program code must be provided too. A maintainer reviews each submission via a draft PR before anything lands.

File extension (optional) — e.g. .oak. Some PLs (e.g. esolangs) have no convention; leave empty if so. Friendly name (optional)

Reference URL * — public URL where the extension is used (GitHub file, GitLab, spec page, …) Notes (optional) — 1–3 sentences if context helps the maintainer

Optional: attach a program from that URL

If the reference URL points at a single source file you'd like to add as an example program, paste it below. The workflow will write it under languages/ACT-1/programs/<sha>/. Keep under ~200 lines.

Title (optional) — e.g. "Factorial", "Quicksort" License guess (optional) — MIT, GPL-2.0, …

Code (optional) — paste verbatim bytes from the reference URL

(or open the pre-filled issue directly)