A new language for COBOL workloads, built on Go
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We’re building an open-source language layer on top of Go, designed specifically for COBOL-style workloads: Native decimal arithmetic (COBOL-accurate) Record structures and copybook compatibility Batch jobs and transactional orchestration as first-class constructs Sequential / indexed file I/O baked into the runtime Compiles through Go for speed, concurrency, and cloud deployability Think of it as Kotlin for COBOL, or “COBOL on Go” familiar to mainframe engineers, powerful for modern developers.Test Results so far: NIST COBOL-85 validation: 77.61% overall (305/393 tests) NC (Core COBOL): 97.89% (93/95) SM (Statements): 100% (13/13) RL (Relative I/O): 100% (26/26) IF (Intrinsic Functions): 100% (45/45) IC (CALL): 96% (24/25) Compliance tests: 100% passing Acceptance tests: 100% passing
HN · launched Nov 5, 2025 · 5 upvotes (top 90%) · 0 views
Niche: programming languages and interpreters · 161 launches, 2 in the last 7 days ▼ -75% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
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More like this: all 161 launches in programming languages and interpreters →
Could you build this?
No Designing and building a domain-specific language on Go for COBOL legacy workloads requires compiler engineering, exact fixed-point decimal arithmetic, and deep mainframe data format expertise.
What it would actually take: The architecture requires an AST parser and compiler/transpiler to Go bytecode or native Go, strict compliance with COBOL decimal arithmetic (avoiding IEEE 754 float drift), byte-level layout parsers for EBCDIC copybooks/records, and custom ISAM file engine support. This demands specialized compiler engineering talent and deep domain knowledge of legacy mainframe COBOL semantics and financial data interchange formats.
Discussion
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Competitors
Other products that read as similar to this one : 105 launches clear the similarity bar, closest 8 shown.
Attention rank: #101 of 106 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 4 days after the earliest competitor.
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