# morganstanley/hobbes

A language and an embedded JIT compiler

Repository: https://github.com/morganstanley/hobbes
Canonical: https://ross.abutalabs.com/products/hobbes
Homepage: http://hobbes.readthedocs.io/
Language: C
License: Apache-2.0
License Family: permissive
Topics: haskell-application, hobbes
Last push: 2026-09-02T14:38:42+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 35, longevity 100
- inputs: {"age_days": 3366, "days_push": 0, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1227, forks 117 (observed 2026-09-03T02:15:15.253498+00:00)

## What it is
Hobbes is a strongly typed domain-specific language with an embedded JIT compiler and runtime for efficient dynamic expression evaluation, data storage, and analysis, designed for high-performance integration with C/C++ applications. It supports pattern matching, comprehensions, LALR(1) parsing, type classes, and remote native code compilation over trusted networks.

## Use cases
- embed a JIT-compiled scripting language in a C++ application
- evaluate dynamic expressions at runtime with low overhead
- record structured data for out-of-band analysis
- parse text with LALR(1) grammars
- classify and destructure data with efficient pattern matching
- run remote code compilation between internal services

## When to choose
- you need a fast embedded DSL inside C/C++ systems
- you want dynamic expression evaluation without sacrificing native performance
- you need efficient data recording and analysis in low-latency environments

## When to avoid
- you need a sandboxed or memory-safe scripting environment
- you target platforms other than Linux
- you cannot trust the code being compiled and executed remotely

## Facets
- artifact type: library
- maturity: active
- function: compiler, interpreter, programming-language, serialization, rpc, parser
- domain: programming-languages, compilers, developer-tools, performance
- platform: cpp, c
- tags: jit-compiler, embedded-language, haskell-inspired, data-storage, dynamic-expression-evaluation, low-latency, data-engineering, linux

## Member repositories
- morganstanley/hobbes (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:15.253498+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:15:20.561594+00:00, confidence not recorded.
  - readme: https://github.com/morganstanley/hobbes (fetched 2026-09-03T02:15:15.253498+00:00, sha 410393863f1a)
- Data as of 2026-08-30T08:39:29.467469+00:00.