programming

General guidance for writing, debugging, and checking Bash, Python, Nix, Terraform, and Markdown, including TDD. TDD means writing a failing test before the code that makes it pass.

In plain words
What is it for?
Use it for scripts, Python utilities and notebooks, Nix packages, Terraform with Checkov scans, Markdown, test-first changes, and root-cause debugging.
Why use it?
It provides a consistent way to investigate causes, keep changes organized, and run focused quality, security, or compliance checks.

Skill for Claude CodeCodex

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/i9wa4/dotfiles/programming
Any agent
npx skills add i9wa4/dotfiles --skill programming
Clone the repo
git clone --depth 1 https://github.com/i9wa4/dotfiles

Made for: Claude Code, Codex.

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 476 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.

ModelPer sessionOnce invoked
Fable 5 $0.00061 $0.00476
Opus 5 $0.00030 $0.00238
Sonnet 5 $0.00012 $0.00095
Haiku 4.5 $0.00006 $0.00048

Measured 2d ago against content hash f0d5b485d99c, 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 2d 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.

skills/programming/SKILL.md · 54 lines

What it actually says

Programming

Owns repo-local implementation guidance and debugging. Prefer a narrower domain skill when one exists.

1. Scope

  • Bash scripts and shell command design.
  • Python utility edits, local execution, and general Python quality: type hints, pytest, uv/ruff/pyright tooling, Jupyter notebooks.
  • Nix package workflow, especially fetcher hash acquisition.
  • Terraform infrastructure code development, plan review, and Checkov security/compliance scanning.
  • Markdown authoring and formatting rules.
  • Red-Green-Refactor and Tidy First implementation loops.
  • Systematic debugging: reproducers, working-pattern comparison, root cause.

Out of scope:

  • Agent harness runtime, Home Manager agent config, hooks, postman routing, or installed agent outputs; use dotfiles.
  • GitHub issue, PR, review, or public-surface mechanics; use collaboration.
  • Data-platform or diagramming workflows; use their target skills.

2. Workflow

  1. Inspect relevant files, repo conventions, and git status.
  2. Select the focused reference below before changing files.
  3. Keep structural and behavioral edits separate when practical.
  4. Run the fastest focused check during iteration, then the nearest repo validation surface before reporting success.
  5. Report changed files, verification, residual Waza findings, and remaining risk.

3. References

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.

  1. 2d ago First seen · 54 lines · 61 tokens per session scan A f0d5b485d99c

Subscribe to this mod's changes

programming is a skill published in the GitHub repository i9wa4/dotfiles (11 stars, last pushed 2d ago), licensed MIT. It adds 61 tokens to every session and 476 once invoked, about $0.0003 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.

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