build

A guided command for starting a new project, feature, or large coding task. It passes your request to a build-planning skill that gathers the requirements before work begins.

In plain words
What is it for?
Use /build followed by a request, such as /build a CLI tool in Rust, when you need to plan and begin substantial development work.
Why use it?
It helps turn a broad request into clear requirements and a structured build process. This reduces the chance of starting implementation with important details missing.

Command

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 commands/hknc/claude-evolve/build
Clone the repo
git clone --depth 1 https://github.com/hknc/claude-evolve
Per session 34 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 128 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 $0.00034 $0.00128
Opus 5 $0.00017 $0.00064
Sonnet 5 $0.00007 $0.00026
Haiku 4.5 $0.00003 $0.00013

Measured 2d ago against content hash 11fd2322e0f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

build 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.

plugins/claude-evolve/commands/build.md · 21 lines

What it actually says

/build Command

Invoke the build-project skill using the Skill tool:

Skill(skill: "build-project")

Pass any arguments the user provided after /build as context. For example, if the user typed /build a CLI tool in Rust, pass "a CLI tool in Rust" as the args parameter.

Do not handle the build request directly. Always delegate to the skill.

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 · 21 lines · 34 tokens per session scan A 11fd2322e0f8

Subscribe to this mod's changes

build is a command published in the GitHub repository hknc/claude-evolve (8 stars, last pushed 7mo ago), licensed MIT. It adds 34 tokens to every session and 128 once invoked, about $0.0002 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 2026-08-31.