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 skills add buildmoonshot/skillpacks --skill keep-it-simplegit clone --depth 1 https://github.com/buildmoonshot/skillpacksWrote 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/skills/buildmoonshot/skillpacks/keep-it-simple)<a href="https://agentmods.dev/skills/buildmoonshot/skillpacks/keep-it-simple"><img src="https://agentmods.dev/badge/skills/buildmoonshot/skillpacks/keep-it-simple/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.
<a href="https://agentmods.dev/skills/buildmoonshot/skillpacks/keep-it-simple"><img src="https://agentmods.dev/badge/skills/buildmoonshot/skillpacks/keep-it-simple.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00053 | $0.00383 |
| Opus 5.5 | $0.00021 | $0.00153 |
| Sonnet 5.5 | $0.00011 | $0.00077 |
| Haiku 4.5 | $0.00005 | $0.00038 |
Grade A, and why
keep-it-simple 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 1mo 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.
What it actually says
Keep It Simple
Write the minimum code that solves the actual problem. Speculative complexity is a cost you pay now for a future that usually never arrives.
Defaults
- Don't build for requirements you don't have. No config options, plugin systems, or "flexibility" nobody asked for. Solve today's problem; generalize later if a second case actually shows up.
- No abstraction for single use. Don't extract an interface, a base class, or a factory for something used once. Two concrete cases earn an abstraction; one does not.
- Don't handle impossible cases. Validate real inputs; don't write error handling for states that can't occur in this code path.
- Prefer the boring solution. A plain function beats a clever pattern when both work. Clever is a tax every future reader pays.
The test
Before adding a layer, ask:
Would a senior engineer look at this and say it's overcomplicated?
If yes, delete the cleverness and write the direct version.
When complexity IS warranted
Real, present requirements justify real structure — genuine duplication, a known second use case, an actual extensibility need someone asked for. The rule isn't "never abstract." It's "don't abstract speculatively." Earn each layer with a concrete reason.
Why this matters
Every speculative abstraction is code to read, test, debug, and maintain — in exchange for flexibility you may never use. The simplest version that works is almost always the right one, and it's far easier to add structure later than to remove it.
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.
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.
- 1mo ago First seen · 32 lines · 53 tokens per session scan A b7a00135122b
keep-it-simple is a skill published in the GitHub repository buildmoonshot/skillpacks (2 stars, last pushed 4mo ago), licensed MIT. It adds 53 tokens to every session and 383 once invoked, about $0.0002 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 2026-08-31.
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