Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add rules/marcoporcellato/matryca-plumber/12-clean-code-architecturegit clone --depth 1 https://github.com/MarcoPorcellato/matryca-plumberWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/rules/marcoporcellato/matryca-plumber/12-clean-code-architecture)<a href="https://agentmods.dev/rules/marcoporcellato/matryca-plumber/12-clean-code-architecture"><img src="https://agentmods.dev/badge/rules/marcoporcellato/matryca-plumber/12-clean-code-architecture.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.00847 |
| Opus 5 | $0.00000 | $0.00424 |
| Sonnet 5 | $0.00000 | $0.00169 |
| Haiku 4.5 | $0.00000 | $0.00085 |
Grade A, and why
12-clean-code-architecture scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Clean Code & Clean Architecture (Matryca Plumber)
Load when editing src/ structure, module boundaries, config parsing, or contributor-facing refactors.
SSOT: docs/CLEAN_CODE_ARCHITECTURE.md. Prompt-specific tiers: docs/PROMPT_ARCHITECTURE.md.
Rule routing: Complements 00-karpathy-agent-behavior.mdc (minimal diff), 02-python-standards.mdc, 04-spatial-parser.mdc.
Dependency Rule (inward only)
src/graph/is domain — must not importagent,daemon, orrag. CI:tests/test_graph_layer_boundary.py.- Surfaces (MCP, CLI, FastAPI) delegate to
graph_dispatch/graph/*— no second write path. - Tier-1 prompts: domain
*/prompts.pyimports onlysrc/agent/prompts/core.py.
SOLID (practical)
| Principle | Do |
|---|---|
| SRP | One reason to change per module; no new inline system strings in llm_client.py |
| DIP | Inject config via PlumberLintConfig / load_plumber_lint_config_from_environ(env); use utils/env_parse in graph code |
| ISP | Prefer narrow protocols (HarvestLLM) over fat god-interfaces |
Clean Code
- Fat modules, thin edges — logic in
graph/,plumber_modules/;@mcp.tool()and CLI stay delegates. - Meaningful names —
StrEnum/Literalover magic strings when values cross module boundaries. - Tests as spec — extend pytest when behavior is non-obvious; no
# type: ignoreinsrc/. - Boy Scout Rule — within PR scope only: e.g. migrate one stray
os.environblock toenv_parsewhen you already touch the file.
Config & env
- New
MATRYCA_*reads insrc/graph/→ useenv_bool/env_int/env_floatfromsrc/utils/env_parse.py. - Sync
.env.exampleper07-env-example.mdc.
v1 — do NOT do in a scoped PR
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 57 lines · 0 tokens per session scan A 2388935a50a5
12-clean-code-architecture is a cursor rule published in the GitHub repository MarcoPorcellato/matryca-plumber (96 stars, last pushed yesterday), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 847 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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