llm-application-dev

🗡️ Zweihander

Simple, robust, and versatile marketplace for agent plugins, forged for the chaos of the AI world.

It collects practical tools for Codex and Claude Code across LLM observability, API exploration, development workflows, assistant operations, research notes, cloud storage, local automation, runtime app verification, and job-search workflows.

Plugin Catalog

flowchart TB

subgraph RowOne[" "]
  direction LR
  Langfuse["`**langfuse**
  Trace exploration, datasets,
  evaluators, dashboards, and experiments`"]:::langfuse
  OpenAPITools["`**openapi-tools**
  List and inspect OpenAPI endpoints
  on running services`"]:::openapi
  LLMApplicationDev["`**llm-application-dev**
  Agent pattern selection and
  schema-guided reasoning`"]:::llm
  PythonDevWorkflow["`**python-dev-workflow**
  Pytest, Redis test patterns,
  Celery, and unit-test review agents`"]:::python
  DevWorkflow["`**dev-workflow**
  Commits, PRs, tickets, releases,
  and review-comment workflows`"]:::dev
end

subgraph RowTwo[" "]
  direction LR
  WorkSessionTools["`**work-session-tools**
  Daily notes, task tracking,
  interviews, and team planning`"]:::session
  AIAssistantOps["`**ai-assistant-ops**
  Assistant setup audits, skill improvement,
  harness adaptation, and Markdown cleanup`"]:::ops
  OSTools["`**os-tools**
  Local macOS automation utilities
  for assistant workflows`"]:::os
  CloudStorageTools["`**cloud-storage-tools**
  User-file storage workflows for
  Dropbox, Drive, OneDrive, and MEGA`"]:::storage
  JobHuntToolkit["`**job-hunt-toolkit**
  Versioned job applications with
  resume tailoring and PDF checks`"]:::job
end

subgraph RowThree[" "]
  direction LR
  RunAndVerifyApp["`**run-and-verify-app**
  Launch apps, verify runtime behavior,
  and record run recipes`"]:::runverify
  MermaidDiagrams["`**mermaid-diagrams**
  Mermaid generation,
  syntax references, and linting`"]:::mermaid
end

Langfuse ~~~ OpenAPITools ~~~ LLMApplicationDev ~~~ PythonDevWorkflow ~~~ DevWorkflow
WorkSessionTools ~~~ AIAssistantOps ~~~ Research ~~~ OSTools ~~~ CloudStorageTools ~~~ JobHuntToolkit
RowOne ~~~ RowTwo
RowTwo ~~~ RowThree
RunAndVerifyApp ~~~ MermaidDiagrams

classDef langfuse fill:#dff7ff,stroke:#0284c7,stroke-width:2px,color:#0f172a;
classDef openapi fill:#dcfce7,stroke:#16a34a,stroke-width:2px,color:#052e16;
classDef llm fill:#fef3c7,stroke:#d97706,stroke-width:2px,color:#451a03;
classDef python fill:#ede9fe,stroke:#7c3aed,stroke-width:2px,color:#2e1065;
classDef dev fill:#fee2e2,stroke:#dc2626,stroke-width:2px,color:#450a0a;
classDef runverify fill:#e0f2fe,stroke:#0369a1,stroke-width:2px,color:#082f49;
classDef session fill:#ccfbf1,stroke:#0f766e,stroke-width:2px,color:#042f2e;
classDef ops fill:#fce7f3,stroke:#db2777,stroke-width:2px,color:#500724;
classDef research fill:#fef9c3,stroke:#ca8a04,stroke-width:2px,color:#422006;
classDef os fill:#e0e7ff,stroke:#4f46e5,stroke-width:2px,color:#1e1b4b;
classDef storage fill:#ecfccb,stroke:#65a30d,stroke-width:2px,color:#1a2e05;
classDef job fill:#ffedd5,stroke:#ea580c,stroke-width:2px,color:#431407;
classDef mermaid fill:#f0fdf4,stroke:#059669,stroke-width:2px,color:#052e16;
style RowOne fill:transparent,stroke:transparent,color:transparent;
style RowTwo fill:transparent,stroke:transparent,color:transparent;
style RowThree fill:transparent,stroke:transparent,color:transparent;

Notes for Users

Use this README when you want to install the marketplace, install a plugin, or choose what each plugin is for. Developer and maintenance notes live in AGENTS.md.

Quick Install

Codex

Add the marketplace:

codex plugin marketplace add Alex-Kopylov/zweihander

Install a plugin:

codex plugin add langfuse@zweihander

List available plugins:

codex plugin list

Update the installed marketplace:

codex plugin marketplace upgrade zweihander

Claude Code

Add the marketplace from inside Claude Code:

/plugin marketplace add Alex-Kopylov/zweihander

Install a plugin:

/plugin install langfuse@zweihander

Update the installed marketplace:

/plugin marketplace update zweihander

For scripts or automation, use the non-interactive CLI:

claude plugin marketplace add Alex-Kopylov/zweihander
claude plugin install langfuse@zweihander
claude plugin marketplace update zweihander

How to Use

1. Add this marketplace to Codex or Claude Code.
2. Pick a plugin from the catalog below.
3. Install the plugin with plugin@zweihander, for example langfuse@zweihander.
4. Ask the assistant naturally for the workflow you want. The installed plugin contributes skills, agents, or both.

Plugins

langfuse

Use when: you need to inspect Langfuse data, create or update evaluation assets, compare experiment runs, or manage dashboard widgets.

Skills