project-harness-bootstrap

project-harness-bootstrap is a skill for Claude Code, Codex from KirillSachkov/sachkov-stack. It costs 93 tokens per session (1,880 once invoked), scanned A, original, MIT.

A setup guide for adding an agent harness to a software project. An agent harness is the project-specific rules, checks, and workflow that help coding agents work consistently.

In plain words
What is it for?
Use it when starting agent-driven work in a repository with no AGENTS.md, .harness directory, checks, or harness lock file. It also checks whether an existing harness is missing or outdated.
Why use it?
It gives projects without a complete harness a defined foundation before development work begins, including tests, review, verification, and owner approval.

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/kirillsachkov/sachkov-stack/project-harness-bootstrap
Any agent
npx skills add KirillSachkov/sachkov-stack --skill project-harness-bootstrap
Clone the repo
git clone --depth 1 https://github.com/KirillSachkov/sachkov-stack

Made for: Claude Code, Codex.

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 project-harness-bootstrap

README.md
[![agentmods](https://agentmods.dev/badge/skills/kirillsachkov/sachkov-stack/project-harness-bootstrap.svg)](https://agentmods.dev/skills/kirillsachkov/sachkov-stack/project-harness-bootstrap)
Your own site
<a href="https://agentmods.dev/skills/kirillsachkov/sachkov-stack/project-harness-bootstrap"><img src="https://agentmods.dev/badge/skills/kirillsachkov/sachkov-stack/project-harness-bootstrap.svg" alt="Measured on agentmods" height="20"></a>
Per session 93 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,880 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 $0.00093 $0.01880
Opus 5 $0.00046 $0.00940
Sonnet 5 $0.00019 $0.00376
Haiku 4.5 $0.00009 $0.00188

Measured 4d ago against content hash 31b9d3bdb52b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

project-harness-bootstrap 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 4d 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/project-harness-bootstrap/SKILL.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Project Harness Bootstrap

Правило владельца (2026-07-19): у каждого проекта свой полноценный харнес поверх общего глобального. Агент, начавший работу в репозитории без харнеса, сначала строит харнес вместе с владельцем и только потом ведёт задачу через него. Молча работать без харнеса нельзя.

Харнес больше не копипастится с эталонного проекта. Он разворачивается из версионируемого пакета harness/ в мозге, и расхождение проекта с пакетом считается механически. Это и есть разница с прошлой версией скилла.

Глобальный контракт остаётся каноном: проектный адаптер переопределяет маршруты (трекер, базовая ветка, команды, CI), но не ослабляет ядро coding-task-pipeline (изоляция, TDD, независимое ревью, свежая верификация, отчёт владельцу, мерж по его команде).

Шаг 0. Посмотреть, что уже есть

Проверяй, не предполагай. Расположение пакета получай через harness/bin/brain-root, не хардкодом пути.

BRAIN=$("$HOME/.claude/hooks/harness-detect.sh" >/dev/null 2>&1; \
        for c in "$AGENT_BRAIN" "$HOME/dev/brain" "$HOME/brain"; do \
          [ -n "$c" ] && [ -f "$c/AGENTS.md" ] && echo "$c" && break; done)
python3 "$BRAIN/harness/bin/harness" diff <repo>

Три исхода:

  • харнеса нет — идём дальше по этому скиллу;
  • дрейф — харнес есть, но отстал: покажи владельцу вывод diff и предложи harness update, полный bootstrap не нужен;
  • совпадает с пакетом — ничего не строим, идём работать.

Никогда не пересобирай молча то, что уже стоит.

Шаг 1. Интервью с владельцем

Спроси один раз, одним компактным списком, и только то, чего нельзя вычитать из репозитория. Выведенные факты подтверждай, а не переспрашивай открытым вопросом.

  • что за проект и стадия (активная разработка, поддержка, эксперимент);
  • стек и версии (предзаполни из манифестов и лок-файлов);
  • точные команды: setup, run, test, lint, build;
  • базовая ветка и политика мержа (по умолчанию: агент доводит до merge-ready, мерж командует владелец);
  • трекер: свой трекер проекта, задачи мозга, или пока никакого;
  • границы: что можно всегда, что спросить сначала, что не трогать;
  • маршрут деплоя или релиза и доступ к проду, если он есть;
  • Definition of Done для типичной задачи.

Read the full file on GitHub · 135 lines

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. 4d ago First seen · 135 lines · 93 tokens per session scan A 31b9d3bdb52b

Subscribe to this mod's changes

project-harness-bootstrap is a skill published in the GitHub repository KirillSachkov/sachkov-stack (2 stars, last pushed 1mo ago), licensed MIT. It adds 93 tokens to every session and 1,880 once invoked, about $0.0005 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.

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