stack-diagram

gstack is an open-source skill and tooling framework for Claude Code, developed by Garry Tan. It turns Claude Code into a virtual engineering team through Markdown-based slash commands and specialist roles covering product review, engineering management, design review, code review, browser-based QA, security auditing, release management, documentation, and other software-delivery tasks. Its tools can drive a real browser and support unit-test, end-to-end-test, and black-box verification loops. The repository describes 23 specialist tools and eight power tools, and distributes the project under the MIT license. It requires Claude Code, Git, and Bun; Node.js is additionally required on Windows.

SeeCode is an open-source agent skill that turns short JSON specifications written by Claude and other coding agents into animated, explorable diagrams. Its renderers handle layout, edge routing, labels, typography, accessibility and motion rather than requiring the model to write SVG; diagrams can be explored as self-contained HTML files and exported as SVG, PNG, JPEG, GIF or MP4. It supports architecture, flow, sequence, state, data, isometric and chart diagrams, with data loaded from CSV or JSON for charts. SeeCode can import Mermaid, Graphviz, PlantUML, D2, draw.io, Excalidraw, Structurizr, BPMN, SQL, Prisma, DBML, OpenAPI and common data files, and can scan a repository to link diagram nodes to source files. It works with Claude Code, Cursor, Codex, OpenCode, GitHub Copilot and other Agent Skills hosts, requires Node 20 or later for its command-line tooling, and is licensed under the MIT License. The project states that it has no server, accounts or telemetry.

tstack is a collection of agent skills for Claude Code and Codex. Its skills automate software-development workflows such as proving, reviewing, filing, monitoring, rebasing, and merging pull requests; the council skill obtains reviews from three models from different providers and loops until they agree, while sol-loop repeatedly reviews a change with GPT Sol. Skills can call other skills, and the repository includes workflows such as full-send, full-stop, takeover, babysit-pr, modernize, file-pr, and automatic pull-request comment formatting. It is installed by copying the repository's skills into the Claude Code or Codex skills directory. An authenticated GitHub CLI and Python 3 are required for some workflows, while council and sol-loop require access to models from other providers. The repository is licensed under MIT.

Archify is an open-source agent skill and Node.js rendering and validation system that turns a codebase or system description into searchable, shareable interactive diagrams. It supports architecture, workflow, sequence, data-flow, and lifecycle diagrams and can be used with Cursor, Claude Code, Codex CLI, and OpenCode. Agents produce typed JSON intermediate representations, which Archify deterministically validates and compiles into self-contained HTML and SVG artifacts. The generated viewer supports node search, optional revision-verified source inspection, upstream and downstream reach tracing, route inspection, semantic-role comparisons, guided stories, themes, presets, and finite motion. Archify can compare two validated snapshots as Before, Delta, and After views, identifying added, removed, changed, moved, and rerouted facts. Its exports include PNG, SVG, WebM, and 1200×630 share cards; it can be installed as a global skill with `npx skills add tt-a1i/archify -g`.

An agent skill for Claude that guides logo projects from discovery briefs through concept development, SVG construction, testing, refinement, and delivery of brand assets. Its workflow researches category conventions in a classified library of more than 1,400 reference SVG logos, develops 8–12 concepts, builds selected concepts in SVG, and pauses at a checkpoint for direction selection before producing a full kit. Dependency-free Python tools audit SVG structure and craft rules, generate concept and test sheets, check marks at sizes down to 16 px in one-colour and reversed treatments, compare them in contextual and competitor-shelf tests, render PNGs, create presentation boards, and export favicon, app-icon, web-manifest, lockup, and other variants. It can also produce icon sets and brand-guideline materials. The skill follows the Agent Skills format, supports Claude Code, Claude.ai, Claude Desktop, and compatible agents, requires Python 3.8+ for its tools, and is distributed under the MIT license; the reference logo files are third-party trademarks excluded from that license.