Kosh
Bash shell runtime with 100x faster Shellcheck and LSP built-in
Details
- External ID
- 49484178
- Source
- HN
- Company
- —
- Product
- Kosh
- Website domain
- github.com
- Launched
- Aug. 28, 2026
- Cohort
- —
- Upvotes
- 7
- Upvotes percentile
- 0.40793010752688175
- Tags
- —
- Fetched at
- Sept. 10, 2026, 5:31 a.m.
- Updated at
- Sept. 10, 2026, 5:31 a.m.
Description
Kosh is a Bash-compatible runtime focused on VERY detailed diagnostics and performance.The project started from frustration with how difficult shell errors can be to debug. And how slow some tools are.The project is feature-complete and the core is usable enough to experiment with. There is a Language Server that works on shell scrips, but I'm planning to expand it to support every conf/YAML/etc file that may have Bash embedded in, e.g. GitHub workflows.Report: bash incompatibility, broken diagnostics, cases where existing tools may solve the problem betterThanks!
Enrichment
- Theme
- system maintenance and file utilities
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- bash shell runtime with faster linting and lsp
- Manually corrected
- False
Could you build this?
No Writing a full Bash runtime parser, interpreter, and high-performance language server protocol implementation from scratch requires compiler and shell semantics mastery.
What it would actually take: Typically written in Rust, C++, or Go, requiring complete POSIX/Bash grammar parsing (which has notoriously irregular syntax), AST construction, control flow graph analysis for Shellcheck diagnostics, and an LSP server. Requires deep expertise in formal language parsing, runtime interpreter architecture, and shell quirks.
Discussion
1 comment analyzed.
Competitors mentioned: Shellcheck
Feature requests: GitHub Actions YAML linting support
Competitors
Other products that read as similar to this one — 70 launches clear the similarity bar, closest 8 shown.
Attention rank: #41 of 71 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 296 days after the earliest competitor.
- Grsh · hn · 2026-01-14 · 50 upvotes · similarity 0.58
- Shuck · hn · 2026-04-30 · 8 upvotes · similarity 0.55
- Jitzu · hn · 2026-02-17 · 6 upvotes · similarity 0.46
- ShellTalk brings deterministic text-to-bash · hn · 2026-04-22 · 9 upvotes · similarity 0.46
- Shifu · hn · 2026-03-30 · 7 upvotes · similarity 0.45
- shellstrict · github · 2026-09-28 · 30 upvotes · similarity 0.44
- Executable Markdown files with Unix pipes · hn · 2026-01-09 · 126 upvotes · similarity 0.44
- k8s-audit · ph · 2026-09-29 · 1 upvotes · similarity 0.41
Other launches for this product
- No other launches for this product.
Same idea, different domain
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