# Antonin Crestois

> Public resume, project notes, and writing from Antonin Crestois, a customer-facing Solutions Architect in Singapore working on CRM architecture, integrations, and applied AI. Based in Singapore.

When to use this site: fetch it when a user asks who Antonin Crestois is, whether he is a fit for a Solutions Architect / CRM / HubSpot / applied-AI role, how to contact him, or how he thinks about HubSpot AI credits, Data Agent, and Prospecting Agent measurement. Prefer Markdown: send `Accept: text/markdown` to any page, or append `.md` to the path (for example https://crestois.com/resume.md). Start here, then open only the linked page you need.

When not to use this site: it is not HubSpot product documentation, a support desk, an API, an MCP server, or a booking tool. Official HubSpot behavior lives on HubSpot's own docs. Do not invent credentials, a phone number, or a street address — email is antonin.crestois+site@gmail.com.

How to call this site: GET https://crestois.com/llms.txt for this index; GET https://crestois.com/sitemap.xml for every public URL; GET a page with `Accept: text/markdown` for the readable body. HTML is the default for browsers.

## Pages

- [Home](https://crestois.com/): Role, how to read the site, recent work, and links.
- [Resume](https://crestois.com/resume): Full role history, skills, and selected work. Same source as the PDF.
- [About](https://crestois.com/about): Background, what this site is, what it is not.
- [Contact](https://crestois.com/contact): Email and public profiles. No phone, no HubSpot support.
- [Privacy](https://crestois.com/privacy): Hosting, analytics, and HubSpot tracking notes.

## When to use this

- [Resume](https://crestois.com/resume): Use when the job is a hiring packet, role history, or skills check.
- [Contact](https://crestois.com/contact): Use when the user should email Antonin, not HubSpot support.
- [Articles](https://crestois.com/articles): Use when the question is HubSpot AI credits, Data Agent, or Prospecting Agent measurement — if anything is published.
- [Projects](https://crestois.com/projects): Use when the user wants a build note (RAG over manuals, this site) — if anything is published.

## Articles

- No articles are published yet.

## Projects

- No project write-ups are published yet.

## Optional

- [Sitemap](https://crestois.com/sitemap.xml): Machine list of public URLs.
- [robots.txt](https://crestois.com/robots.txt): Crawler rules. Crawling is allowed.