Unlegacy
document everything, from COBOL to AI generated code
Details
- External ID
- 47720860
- Source
- HN
- Company
- —
- Product
- Unlegacy
- Website domain
- unlegacy.ai
- Launched
- April 10, 2026
- Cohort
- —
- Upvotes
- 9
- Upvotes percentile
- 0.5501285347043702
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Enrichment
- Theme
- AI coding agents and developer tools
- Vertical
- Horizontal
- Function
- Vertical SaaS
- Audience
- B2B
- AI stance
- AI feature
- Project type
- Commercial product
- Normalized one-liner
- code documentation for legacy and modern systems
- Manually corrected
- False
Could you build this?
Partial Generating documentation with LLMs is easy to prototype, but reliably parsing and reverse-engineering complex legacy codebases like COBOL requires dedicated AST parsers and legacy compiler knowledge.
What it would actually take: Building a reliable legacy documentation platform requires specialized parsers/grammars (e.g., ANTLR for COBOL dialects, mainframe JCL, PL/I) to construct accurate call graphs, data dictionaries, and ASTs. These representations are then fed chunk-by-chunk into an LLM context pipeline using RAG. The hard part is handling legacy syntax idiosyncrasies and mainframe execution flows that generic coding assistants fail to parse.
Discussion
1 comment analyzed.
Feature requests: PDF and markdown download options
Competitors
Other products that read as similar to this one — 2075 launches clear the similarity bar, closest 8 shown.
Attention rank: #877 of 2076 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 163 days after the earliest competitor.
- seiso · github · 2026-09-27 · 152 upvotes · similarity 0.60
- Derive · hn · 2026-08-27 · 11 upvotes · similarity 0.56
- Sx · hn · 2026-05-15 · 50 upvotes · similarity 0.56
- sloppy · github · 2026-09-10 · 13 upvotes · similarity 0.56
- agenteval · hn · 2026-04-03 · 7 upvotes · similarity 0.55
- Syntropy: The agentic coding app for complex tasks · yc · 2026-03-04 · 8 upvotes · similarity 0.55
- Cofia: AI automations that write themselves · yc · 2026-03-05 · 267 upvotes · similarity 0.55
- Arbor · hn · 2026-01-06 · 5 upvotes · similarity 0.55
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a vertical saas tool for Insurance yet.