detect-build-info

detect-build-info is a command for Claude Code from sherpa-sh/Sherpa-Action. It costs 6 tokens per session (275 once invoked), scanned A, original, Apache-2.0.

A project-inspection command that identifies the programming language, framework, package manager, build commands, and build folder needed for a project. It records these details in a repository file for later use.

In plain words
What is it for?
Use it to inspect a codebase and create build instructions in .sherpa.sh/build-info.md. It can then explain how the project will be built with the Sherpa build command.
Why use it?
It removes guesswork when setting up a build or continuous integration pipeline, which automatically checks and builds code. It also helps avoid using the wrong package manager or build command.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Part of the Sherpa plugin — 5 commands, 5 MCP servers shipped together

Good fit Use it to inspect a codebase and create build instructions in .sherpa.sh/build-info.md. It can then explain how the project will be built with the Sherpa build command.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/sherpa-sh/sherpa-action/detect-build-info
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.

Clone the repo
git clone --depth 1 https://github.com/sherpa-sh/Sherpa-Action

Made for: Claude Code.

Or install Sherpa, the plugin that ships this one along with the rest of its 5 commands, 5 MCP servers.

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 detect-build-info

README.md
[![agentmods](https://agentmods.dev/badge/commands/sherpa-sh/sherpa-action/detect-build-info/github.svg)](https://agentmods.dev/commands/sherpa-sh/sherpa-action/detect-build-info)
Your own site
<a href="https://agentmods.dev/commands/sherpa-sh/sherpa-action/detect-build-info"><img src="https://agentmods.dev/badge/commands/sherpa-sh/sherpa-action/detect-build-info/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 detect-build-info

Your own site · 80×15
<a href="https://agentmods.dev/commands/sherpa-sh/sherpa-action/detect-build-info"><img src="https://agentmods.dev/badge/commands/sherpa-sh/sherpa-action/detect-build-info.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 6 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 275 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.
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 $0.00006 $0.00275
Opus 5 $0.00003 $0.00138
Sonnet 5 $0.00001 $0.00055
Haiku 4.5 $0.00001 $0.00028

Measured 11d ago against content hash 422d0c17f364, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

detect-build-info 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 11d 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.

sherpa/commands/detect-build-info.md · 15 lines

What it actually says

Detect Build Info

Detect the language, build commands, framework, and other info necessary to build a CI/CD pipeline for the project.

  1. Install npm i -g @netlify/build-info if its not available.
  2. Then detect the json build info by running build-info path/to/site --rootDir /project/root/dir. Use these user provided paths: "$ARGUMENTS". If no paths are provided, assume you are in the correct path.
  3. If you cannot determine the language, build commands (npm i, npm run build, etc) with #2, read the codebase and make your best guess.
  4. ALWAYS read the code base to determine the appropriate package manager to use (npm, pnpm, yarn, bun, deno, etc)
  5. Write the output to the file .sherpa.sh/build-info.md. Ensure .sherpa.sh is in the root of the repo next to .git folder. Never write anything explicitly referencing netlify into the config. Always include the framework, build commands and the folder where the build command must be run from.
  6. Summarize to the user how this project will get build with the /Sherpa/build command.
  7. Continue with the original command, if there is one.
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. 11d ago First seen · 15 lines · 6 tokens per session scan A 422d0c17f364

Subscribe to this mod's changes

detect-build-info is a command published in the GitHub repository sherpa-sh/Sherpa-Action (22 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 6 tokens to every session and 275 once invoked, about $0.0000 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.