sema

Name: sema Review
Item: sema
Rating: 3.0
Author: Aaron Matthews

Skill Development Usable

Works inClaude Code

Usable Scanned — metadata only

Enables teams to build LLM-integrated applications with formal language semantics, reducing integration friction and runtime errors compared to ad-hoc prompt…

A Lisp with first-class LLM primitives, implemented in Rust

Generate code snippets by calling Claude directly from Lisp expressions
Build AI-powered scripts that combine logic and language model requests
Automate repetitive text generation tasks using Lisp control flow

25 starsMIT (commercial OK)Free

Usable rating — This tool is functional but has notable gaps. Review the evaluation notes below before deploying.

Why it matters

Enables teams to build LLM-integrated applications with formal language semantics, reducing integration friction and runtime errors compared to ad-hoc prompt engineering or string-based APIs.

Best for

AI-forward engineering teams building production LLM workflows requiring deterministic behavior and type safety.

Works in

Claude Code Claude Cowork Claude Chat

Source

https://github.com/HelgeSverre/sema

By HelgeSverre

How to Get It

Option 1: Claude Desktop App (Code Mode)Click the + button next to the prompt box → Plugins → Add plugin. Search and click Install. Skills work in Claude Code only.

Option 2: Paste into Claude CodeCopy the command below and paste it into your conversation. Claude will install it.

Command

claude plugins install HelgeSverre/sema

Tip: Paste this into a Claude Code conversation. Verify command matches your Claude Code version.

Auto-generated from the tool's public listing — not hands-on verified. Cross-check against the source repo's README before running.

First thing to try

After installing, paste this into Claude:

Help me generate code snippets by calling Claude directly from Lisp expressions

CostFree

Trust Signals Auto-scanned

Stars25Contributors3Last updated2026-07-24LicenseMIT (OK for commercial use)Known CVEsNone foundSources: GitHub Advisory Database + OSV.dev · Scanned 2026-07-25 · scanner v1

Community Pulse New

No community discussions found yet. This doesn't mean the tool isn't good — it may be new or serve a niche use case.

Reviewer notes

Auto-scanned review. These are observations, not a security certification.

Scored from trust signals (evidence-eval-v1): 25 GitHub stars; 3 contributors; last commit 1d ago; license MIT.

Things to check

Scanned, not hands-on tested — this entry was auto-scanned from public metadata (GitHub metrics, license, security flags). No reviewer has run it, and no tool-specific limitations have been documented yet.

How to evaluate tools before deploying →

Data shown here comes from public APIs and automated scanning. Reviewer notes reflect one person's experience. This is not a security certification or legal recommendation. Always evaluate tools according to your own organization's policies.

Evaluation Scores

Evaluation

Ease of Use

3/5

Versatility

2/5

Reliability

4/5

Security

3/5

Overall score3.00 / 5.00 UsableEvaluatedJul 2026

Scored from trust signals (evidence-eval-v1): 25 GitHub stars; 3 contributors; last commit 1d ago; license MIT.

← Back to the Claude Observatory