A strict set of programming instructions for Python, Rust, and TypeScript projects, with language-specific rules and modern development tools.

Use it when writing or changing files in these languages, including application code, tests, and related configuration.

It helps keep code typed, checked, and aligned with the project's chosen tools and conventions.

programming — Skill by code-yeongyu

Install

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.

agentmods

npx agentmods add skills/code-yeongyu/lazyclaudecode/programming

Any agent

npx skills add code-yeongyu/lazyclaudecode --skill programming

Clone the repo

git clone --depth 1 https://github.com/code-yeongyu/lazyclaudecode

Made for: Claude Code, Codex.

Per session 261 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 9,266 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00261	$0.09266
Opus 5	$0.00130	$0.04633
Sonnet 5	$0.00052	$0.01853
Haiku 4.5	$0.00026	$0.00927

Measured yesterday against content hash ffb201197e73, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

programming 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 yesterday.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/go/check-no-excuse-rules.sh, scripts/go/new-project.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

plugins/omo/skills/programming/SKILL.md · 464 lines

How it starts

The opening of the file, as written. The whole thing — 464 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Programming

You are a senior engineer who writes Python, Rust, and TypeScript with one shared discipline. Type-strict. Stack-first. Async-correct. Architecturally honest about file size.

This skill is an index. The hard per-language rules live under references/. Load the language-specific reference before writing a single line of code.

PHASE 0 — LANGUAGE GATE (RUN THIS FIRST, EVERY TIME)

DO NOT WRITE OR EDIT A SINGLE LINE OF CODE BEFORE COMPLETING THIS GATE.

Identify the language from the file extension or the user's request.

STOP and read the matching reference set:

File / Language	MANDATORY reading (load `Read` tool on every file below)
`.py`, `.pyi`, "Python"	`references/python/README.md` + every file under `references/python/` that the README tells you to load on demand
`.rs`, `Cargo.toml`, "Rust"	`references/rust/README.md` + every file under `references/rust/` that the README tells you to load on demand. IF the change touches `unsafe`, `mut`, `const`, `MaybeUninit`, FFI, `unsafe impl Send/Sync`, or a custom lock-free primitive: ALSO load `references/rust-ub/README.md` plus every file under `references/rust-ub/`.
`.ts`, `.tsx`, `.mts`, `.cts`, "TypeScript"	`references/typescript/README.md` + every file under `references/typescript/` that the README tells you to load on demand
`.go`, `go.mod`, `go.sum`, `.golangci.yml`, `*.proto` next to a Go module, "Go" / "Golang"	`references/go/README.md` + every file under `references/go/` that the README tells you to load on demand

Only after the references are loaded, apply the shared philosophy below plus the per-language iron list from the reference.

No exceptions for "small" or "one-off" code. The whole point of the modern toolchain (uv + PEP 723, rust-script, Bun) is that disposable scripts cost nothing to write with full discipline.

Shared philosophy (all three languages)

These are not style preferences. They are the six axioms every recipe in references/ derives from.

Read the full file on GitHub · 464 lines

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

yesterday First seen · 464 lines · 261 tokens per session scan A ffb201197e73

Subscribe to this mod's changes

programming is a skill published in the GitHub repository code-yeongyu/lazyclaudecode (18 stars, last pushed 3mo ago), licensed MIT. It adds 261 tokens to every session and 9,266 once invoked, about $0.0013 per session on Opus 5. 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.

Code review Testing Writing and docs ast-grep claude-code claude-code-plugin hooks lsp mcp

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