fragmented-marketplace

NullFragment's Claude Code plugin marketplace. One repo, three ways to install:

• fragmented-code: a meta-plugin that installs everything in the collection at once (via dependencies).
• Each skill and plugin, installed individually.

The skills are plain markdown, so Codex and Gemini can read them too (symlink a skill dir into ~/.agents/skills/).

Install (Claude Code)

Add the marketplace once:

/plugin marketplace add https://code.nullfragment.dev/agentic/fragmented-marketplace.git

Then install everything:

/plugin install fragmented-code@fragmented-marketplace

or install pieces individually:

/plugin install mermaid-diagrams@fragmented-marketplace

Update later with /plugin marketplace update, then /plugin update <name>.

What's in the collection

Entry	Type	Install	What it is
fragmented-code	meta	/plugin install fragmented-code@fragmented-marketplace	Installs the whole collection (depends on every entry below)
document-based-engineering	plugin	/plugin install document-based-engineering@fragmented-marketplace	The full DBE bundle: the eight standards skills below, deterministic hooks, the always-on guidance file, and the dbe- commands
operating-standards	skill	/plugin install operating-standards@fragmented-marketplace	Git safety and hygiene: never-push, the history-rewrite gate, branch and no-worktree rules, the squash procedures, commit format, file operations
communication-standards	skill	/plugin install communication-standards@fragmented-marketplace	Plain committed prose with no filler, plus markdown mechanics (never wrap prose, aligned tables, the heading ladder, fenced code, links)
mermaid-diagrams	skill	/plugin install mermaid-diagrams@fragmented-marketplace	Mermaid done right: mode and theme selection (pastel-dark default), verbatim theming, diagram-type selection, color theory, syntax, validation
plan-lifecycle	skill	/plugin install plan-lifecycle@fragmented-marketplace	The design-to-plan-to-execute methodology: the interactive brainstorm, designs and plans, PROJECT_CONTEXT, phased execution, resume
project-structure	skill	/plugin install project-structure@fragmented-marketplace	Self-documenting layout: the documentation/ tree and README hubs, code packaging, the agentic-context/ records
agent-guidance	skill	/plugin install agent-guidance@fragmented-marketplace	The per-repo AGENTS.md guide (CLAUDE.md = @AGENTS.md): the template, universal rules, the adding-a-new-X recipe, per-project adaptation
code-writing	skill	/plugin install code-writing@fragmented-marketplace	How code is written: match surrounding code, the formatter configs, comments and docs, testing through the public interface, dependency discipline
decision-engine	skill	/plugin install decision-engine@fragmented-marketplace	The durable decision archive: per-category decisions/ files with orthogonal tags, the consult/propose/gate workflow, bidirectional supersede

Layout

fragmented-marketplace/
├── .claude-plugin/
│   └── marketplace.json           # lists the meta + each skill/plugin
├── skills/
│   ├── operating-standards/       # the eight DBE standards skills, each installable alone
│   ├── communication-standards/
│   ├── mermaid-diagrams/          # + references/ and showcase/
│   ├── plan-lifecycle/            # + references/templates.md
│   ├── project-structure/
│   ├── agent-guidance/            # + references/agents-md-template.md
│   ├── code-writing/              # + references/ (editorconfig, clang-format)
│   └── decision-engine/           # + references/schema.json
└── plugins/
    ├── fragmented-code/
    │   └── .claude-plugin/plugin.json   # meta-plugin: dependencies only
    └── document-based-engineering/      # composes the 8 skills + hooks + guidance + commands
        ├── .claude-plugin/plugin.json
        ├── guidance.md
        ├── hooks/                       # 5 PreToolUse + 1 SessionStart
        └── commands/                    # dbe- prefixed slash commands

Adding a skill

1. Add skills/<name>/SKILL.md (plus any supporting .md files alongside it; reference them from SKILL.md so they load on demand).
2. Add a marketplace.json entry: { "name": "<name>", "source": "./", "strict": false, "skills": ["./skills/<name>"], "description": "…" }.
3. Add "<name>" to the dependencies array in plugins/fragmented-code/.claude-plugin/plugin.json so "install everything" includes it.

Adding a plugin

1. Create plugins/<name>/.claude-plugin/plugin.json (plus its skills/, commands/, agents/, hooks/).
2. Add a marketplace.json entry: { "name": "<name>", "source": "./plugins/<name>", "description": "…" }.
3. Add "<name>" to the meta's dependencies array.

Notes

• Public repo: HTTPS install and background auto-update work with no auth. If it goes private, switch the marketplace source to SSH (git@code.nullfragment.dev:agentic/fragmented-marketplace.git) with your key in ssh-agent, or a scoped token URL rewrite.
• Meta-plugin dependencies are bare names, so they track the marketplace's latest. Pin versions later with semver + claude plugin tag if you want stable releases.