werkstoff

My personal workshop for Claude Code plugins — a marketplace repo (.claude-plugin/marketplace.json) holding one plugin per directory under plugins/, the same layout anthropics/claude-plugins-official uses.

Plugins

Each plugin exists to catch or enforce one distinct thing — pick by problem, not by feature list. Every plugin README opens with a Why this exists section explaining the specific failure mode it targets, and an Example Prompts section showing what to actually say to Claude Code to trigger it.

• befund — codebase self-assessment for live, actively-maintained repos: import-graph-based stage/wire mapping, docs-vs-code drift detection, CI/CD topology audit, house-rules convention enforcement, and a multi-repo portfolio dashboard.

• zeugnis — catches where AI-authored code confabulates (confabulation — an LLM confidently filling a gap with plausible-but-false content): declared dependencies that don't exist (hallucination detection), tests that assert nothing (LLM-reasoned assertion/mutation strength), contracts drifted from their call-sites (machine-checkable contract-drift), and unreliable agentic-loop definitions — plus a bounded autonomous self-optimization cycle (zeugnis-cycle) with an opt-in propose/fix mode.

• zirkel — a prompt-engineering technique library for complex/vague tasks, composed by zirkel-solve into an actual workflow (clarify-scope, explore-branches, decompose-chain, reason-verify, and more) rather than exposed as a raw technique picker.

• cupertino — a Steve-Jobs-grounded design and craft discipline for a project's whole lifecycle, 10 skills each grounded in a specific, real Jobs/Apple decision, composed by cupertino-review into one fixed lifecycle pipeline.

• arbeitsplan — compiles a stated problem into an executable, budgeted agentic workflow and runs it as a redundant swarm: N candidates over the same scope in their own git worktrees, judged blind, exactly one landed and the rest deleted — so nothing is ever merged and a merge conflict cannot occur. Converges by widening, never by retrying; generates the takt beats that enforce its order rather than enforcing ordering twice.

• andon — an evidence-grounded harden-and-advance loop for live, actively-maintained codebases: propose maximally, verify adversarially across seven proof strategies, and advance only past a proven wire — never past a broken or unproven one.

• cli-scaffold — scaffolds production-grade CLI apps across 12 languages (Python, TypeScript/ JavaScript, Ruby, PHP, Perl, .NET, Rust, Go, Bash, Zsh, PowerShell, POSIX sh), freeform-generated every time against a frozen five-pillar doctrine (UX, backend/core separation, stability, idiomatic distribution, Unix composability) rather than stored boilerplate.

• passung — harmonizes an already-modern, live codebase that grew inconsistent: derives the canonical form for undocumented, non-deprecated pattern variants (documented conventions and version-deprecated idioms are out of scope — see befund) via a structured preflight / scan / map / canonize / brief / align / verify / status workflow, with a navigable consistency matrix and an equivalence-verified alignment pass.

• takt — enforces declared beat order at the tool-call layer: denies an edit or a dispatch that runs ahead of the step it depends on, so cross-plugin sequencing is a runtime gate rather than a sentence a model may skip. Inert until a repository declares its beats.

• lehre — researches a code style, pattern and architecture doctrine from external authority plus real repository evidence, then enforces it at the tool-call layer: a blocking rule denies the write that would violate it. Works from a blank page as well as over an existing tree. Inert until a repository declares a doctrine.

• nacharbeit — reworks a Claude Code plugin to the official Anthropic standard: a calibrated review of its skills, agents, hooks, scripts, viewers, manifest, README and docs wiring (a sabotage-tested linter plus a finder that must pass a sealed hold-out per rule family), then a tier-gated fix pass under a PreToolUse hook that denies every edit outside the fix lock. Opus- and human-tier findings are surfaced, never auto-applied.

• matrize — derives a named, platform-neutral design system from reference exemplars: measurement and interpretation stay separate artefacts, every reference is graded both for how far its values can be trusted and for what may be reproduced from it, every named element carries a purpose, a rule and an anti-rule, and the DTCG token file — never CSS — is the source every other target is emitted from. References are read-only, enforced by a hook.

Install

/plugin marketplace add Anselmoo/werkstoff
/plugin install befund@werkstoff

Swap befund for any plugin name above (zeugnis, zirkel, cupertino, andon, arbeitsplan, cli-scaffold, passung, takt, lehre, nacharbeit, matrize) to install a different one — each is independent and can be installed on its own.

Or for local development, point Claude Code straight at a plugin directory without registering the marketplace:

claude --plugin-dir /path/to/werkstoff/plugins/befund

Docs

• Orchestration — how these plugins compose with each other, with superpowers, and with the official Anthropic plugins. Includes a task-indexed prompt catalog, a routing table for the pipelines that overlap, and the composition hazards of running several hook-bearing plugins in one session.
• Plugin authoring — the craft standards to read before writing or editing a SKILL.md or agent file.

Adding a new plugin

Scaffold it under plugins/<name>/ (own .claude-plugin/plugin.json, own README.md) and add an entry to the root .claude-plugin/marketplace.json's plugins array with "source": "./plugins/<name>". Then run python3 plugins/nacharbeit/scripts/nacharbeit_lint.py plugins/<name> --docs-root docs: its P-* and D-* rules name every other place a plugin has to be registered (.rrt.toml version group and field target, the two release workflows' allowlists, the docs stub, sidebar and grid, this README, the count words, the orchestration references) and fail loudly for each one still missing. Each plugin is independent — no shared code between them beyond convention. The root LICENSE (MIT) covers it; add a plugin-local LICENSE only if it carries forward a different license, as passung does (see License below).

License

MIT for the repo and every plugin except passung, which is Apache-2.0 — it's a Derivative Work of Anthropic's code-modernization plugin and carries that plugin's license forward; see plugins/passung/LICENSE and NOTICE. See the repo-root LICENSE for everything else.