What is ai-engineering-leader-toolkit CLAUDE.md?

Project instructions for an engineering-leadership toolkit exposed as a remote, authentication-free MCP service. The service offers tools about salaries, team-lead readiness, mentoring, management, coaching, and related business cases.

Use them when developing or operating the toolkit, including its TypeScript code, Cloudflare Worker, MCP routes, tests, and deployment process.

They give coding agents the context and commands needed to run, test, build, and deploy the service correctly.

How marian-kamenistak/ai-engineering-leader-toolkit configures Claude

Reuse

Borrowing it

Nothing to install: this file belongs to marian-kamenistak/ai-engineering-leader-toolkit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/marian-kamenistak/ai-engineering-leader-toolkit/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/marian-kamenistak/ai-engineering-leader-toolkit

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/marian-kamenistak/ai-engineering-leader-toolkit/claude-md/github.svg)](https://agentmods.dev/instructions/marian-kamenistak/ai-engineering-leader-toolkit/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/marian-kamenistak/ai-engineering-leader-toolkit/claude-md"><img src="https://agentmods.dev/badge/instructions/marian-kamenistak/ai-engineering-leader-toolkit/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/marian-kamenistak/ai-engineering-leader-toolkit/claude-md"><img src="https://agentmods.dev/badge/instructions/marian-kamenistak/ai-engineering-leader-toolkit/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 721 This file is loaded in full into every session.

When invoked 721 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00721	$0.00721
Opus 5	$0.00360	$0.00360
Sonnet 5	$0.00144	$0.00144
Haiku 4.5	$0.00072	$0.00072

Measured 6d ago against content hash b9e6428e6aa3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

ai-engineering-leader-toolkit CLAUDE.md 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 6d 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.

CLAUDE.md · 44 lines

How it starts

The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.

eng-leadership-toolkit

What this is

Remote, authless MCP server for the mc stream at https://www.marian.coach/mcp (npm name ai-engineering-leader-toolkit). Ten tools grounded in Marian's mentoring data: get_started (routes a greeting/test/unclear message to the right tool below), salary calculators, team-lead readiness, benchmarks, mentor/coach chooser, 1:1 playbooks, first-time-manager guidance, mentoring business case, coaching cost. GET /mcp/business-case is the JSON surface for the marian.coach pricing wizard.

Stack

Cloudflare Worker + Durable Object EngLeadershipToolkit (MCP_OBJECT), McpAgent (agents ^0.17), streamable HTTP
TypeScript 6, zod 4, vitest, oxlint/oxfmt, @posthog/mcp + posthog-node
wrangler ^4.105, npm
Routes marian.coach/mcp* + www. — owns /mcp*; mentoring-inquiry-builder nests under /mcp/mentoring*
Cron */15 * * * * uptime probe

Run / build / deploy / test

# dev:    npm run dev
# build:  npm run type-check && npm run lint:fix && npm run format
# test:   npm test                    # vitest (test/business-case.test.ts)
# deploy: set -a && source ~/.env && set +a && npm run deploy

Sources of truth

Data	Lives in	Id / path
Calculators / readiness test	mirror the live marian.coach pages	`/developer-salary-calculator/`, `/engineering-manager-salary-calculator/`, `/team-lead-readiness-test/`
Benchmarks (CC BY 4.0)	marian.coach	`/engineering-leadership-statistics/`
Registry metadata	`server.json`, `mcp.json`, `LAUNCH-STATUS.md`, `REGISTRATION-MANUAL-2026-08-09.md`
Secrets	Worker-only, no `.op-secrets`: `MCP_USAGE_SLACK_CHANNEL`, `SLACK_BOT_TOKEN_ELC`, `SLACK_WEBHOOK_URL` (`wrangler secret list`, 2026-08-30)	PostHog key is not a secret — public `posthogKey: "phc_…"` literal in `src/index.ts`

Definition of done

npm test and npm run type-check exit 0
wrangler deploy exits 0
tools/list POST to https://www.marian.coach/mcp returns 10 tools; GET returns 200 HTML docs
GET https://www.marian.coach/mcp/business-case?lang=en returns 200 JSON
wrangler tail --format json for 60s: zero console.error, zero exceptions
/mcp/mentoring still routes to mentoring-inquiry-builder

Read the full file on GitHub · 44 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.

6d ago Changed · +1 lines · +21 tokens per session b9e6428e6aa3
11d ago First seen · 43 lines · 700 tokens per session scan A f8dacb76dc2f

Subscribe to this mod's changes

ai-engineering-leader-toolkit CLAUDE.md is an instructions file published in the GitHub repository marian-kamenistak/ai-engineering-leader-toolkit (1 stars, last pushed 6d ago), licensed MIT. It adds 721 tokens to every session, about $0.0036 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.

cloudflare-workers engineering-leadership engineering-management mcp mcp-server mentoring

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

ai-engineering-leader-toolkit: Instructions file for Claude Code