fuck-over-engineering

fuck-over-engineering is a skill for Claude Code, Codex from vinta/hal-9000. It costs 85 tokens per session (810 once invoked), scanned A, original, MIT.

A code-review guide for finding unnecessary complexity in a repository, folder, or file. It looks for dead code, needless dependencies, duplicated helpers, and abstractions with little value.

In plain words
What is it for?
Use it to audit a chosen scope, rank what can be deleted or replaced, and identify simpler standard-library, platform, or existing-code solutions.
Why use it?
It helps shorten and simplify a codebase without changing its behavior.

Skill for Claude CodeCodex

Written for Claude Code and Codex: argument-hint in frontmatter, but also agents/openai.yaml present. Also seen: mentions subagents; names the AskUserQuestion tool; mentions Claude Code.

Part of the hal-skills plugin — 12 skills shipped together

Good fit Use it to audit a chosen scope, rank what can be deleted or replaced, and identify simpler standard-library, platform, or existing-code solutions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vinta/hal-9000/fuck-over-engineering
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.

Any agent
npx skills add vinta/hal-9000 --skill fuck-over-engineering
Clone the repo
git clone --depth 1 https://github.com/vinta/hal-9000

Made for: Claude Code, Codex.

Or install hal-skills, the plugin that ships this one along with the rest of its 12 skills.

Wrote 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.

agentmods badge for fuck-over-engineering

README.md
[![agentmods](https://agentmods.dev/badge/skills/vinta/hal-9000/fuck-over-engineering/github.svg)](https://agentmods.dev/skills/vinta/hal-9000/fuck-over-engineering)
Your own site
<a href="https://agentmods.dev/skills/vinta/hal-9000/fuck-over-engineering"><img src="https://agentmods.dev/badge/skills/vinta/hal-9000/fuck-over-engineering/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for fuck-over-engineering

Your own site · 80×15
<a href="https://agentmods.dev/skills/vinta/hal-9000/fuck-over-engineering"><img src="https://agentmods.dev/badge/skills/vinta/hal-9000/fuck-over-engineering.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 810 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00085 $0.00810
Opus 5.5 $0.00034 $0.00324
Sonnet 5.5 $0.00017 $0.00162
Haiku 4.5 $0.00009 $0.00081

Measured 3d ago against content hash 5cdb08597c1d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fuck-over-engineering 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 3d 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/fuck-over-engineering/SKILL.md · 45 lines

How it starts

The opening of the file, as written. The whole thing — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fuck Over-Engineering

Audit the scope for over-engineering and report what to cut. The best outcome is a shorter codebase with the same behavior. The argument is the scope; without one, the whole tree. Read what the scope holds before judging it, and fan out subagents when it will not fit in context.

Tags

  • delete: dead code, unused flexibility, speculative feature, special-case branch no input reaches. Nothing replaces it.
  • reuse: hand-written code, or a near-duplicate, that a helper in this codebase or an installed dependency already provides. Name the helper or function.
  • stdlib: hand-rolled thing, or a dependency, that the language's standard library ships. Name the function.
  • native: dependency or code doing what the platform already does. Name the feature.
  • yagni: abstraction with one implementation, factory with one product, wrapper that only delegates, file exporting one thing, config or flag nobody sets, layer with one caller.
  • shrink: same logic, fewer lines. Show the shorter form.

Evidence

Every finding cites the evidence that makes it a cut: caller count, implementation count, or the stdlib or platform feature and the version that ships it. Count callers through dynamic dispatch, entry points, hooks, and tests, not grep alone. A published package's public export is not a cut at zero in-repo callers: its callers live outside the repo. Verify stdlib: and native: claims against current docs (the find-docs skill when present) before asserting them.

A finding removes lines or concepts; moving them between files is a refactor, not a cut. Fewer, bigger cuts beat a long list: a shrink: that saves two lines earns a slot only when it also removes a concept.

Output

Use AskUserQuestion in Claude Code or request_user_input in Codex when available. Use plain text when neither tool is available.

One line per finding, numbered, ranked biggest cut first:

N. <tag> <what to cut>. <replacement>. <evidence>. [path:line]

delete: omits the replacement sentence. End with net: -<N> lines, -<M> deps possible. Nothing to cut: Lean already. Ship.

Read the full file on GitHub · 45 lines

Files

What ships with it

1 file 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.

  1. 3d ago Changed · -3 lines 5cdb08597c1d
  2. 7d ago Changed · -1 lines 4253d4621622
  3. 23d ago Changed 0b59c2bcb049
  4. 24d ago Changed 9b3dc3a90e04
  5. 1mo ago Changed · -1 lines b5277fc3ee5f
  6. 1mo ago Changed · +2 lines 6d17be66395b
  7. 1mo ago Changed 7d4154cdc26e
  8. 2mo ago Changed 67a83ccf4bad
  9. 2mo ago Changed · -7 tokens per session 7abf1e7d3058
  10. 2mo ago First seen · 48 lines · 92 tokens per session scan A 5dbf05976d4b

Subscribe to this mod's changes

fuck-over-engineering is a skill published in the GitHub repository vinta/hal-9000 (143 stars, last pushed yesterday), licensed MIT. It adds 85 tokens to every session and 810 once invoked, about $0.0003 per session on Opus 5.5. 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.

Related

fuck-over-engineering compared with skills from other repositories

fuck-over-engineering next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
fuck-over-engineeringvinta/hal-9000Skill143yesterdayMITA85Claude Code, Codex
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code-reviewagno-agi/agnoSkill43ktodayApache-2.0A16Claude Code, Codex
swift-concurrency-projacklandrin/OnlySwitchSkill6.1kyesterdayMITA35Codex
splitting-oversized-modulesPostHog/posthog-fossSkill731todayMITA197Claude Code, Codex
red-team-reviewwinstonkoh87/Athena-PublicSkill623todayMITA103Claude Code
pr-watchsonichi/sutandoSkill409todayMITA125Claude Code