The AI era doesn’t replace the IT practitioner.
It makes you more essential.
If you know how to lead it — not just use it.
AI can now write the Terraform, draft the policy, and generate the architecture diagram in seconds. It cannot decide which of those to trust. That decision is the job — and it is the one thing AI makes more valuable, not less. Delfen.ai works through those decisions with 30+ years of practice behind it — infrastructure engineer to IT Director and Chief Enterprise Architect, much of it in DNB-regulated financial services. Named tools. The failure modes. A verdict you can act on.
Featured: open source
Every AI agent needs a logbook. Yours should stay in Europe.
The first question after an agent goes wrong is what it did and who approved it. This logbook answers that from your own server: each action, tool call and human approval the agent logs, kept in a tamper-evident file. Works with any model. One Docker container, no outbound network, Apache 2.0.
- Tamper-evident: change, insert, remove or reorder a line and the verify command tells you exactly where
- Any model, any cloud, or no cloud: built on MCP, the open standard for connecting agents to tools
- Audit-ready: who, what, why, approved by whom, with what outcome, exported to JSON or CSV
v0.1: early, working, tests passing. Hosted version on EU servers, reserve now, not yet live: €29/month, 30-day free trial.
Illustrative output, abbreviated
$ logbook verify
OK — 212 events, chain intact
$ logbook tail --limit 1
{
"seq": 212,
"agent_id": "invoice-bot",
"model": "mistral-small-4",
"action": "pay_invoice",
"arguments": { "amount": 1250, "iban": "***masked***" },
"approval": "auto",
"approval_rule": "pay-under-2000-matched-po",
"outcome": "success",
"prev_hash": "9f2c…", "hash": "3a1b…"
}
Why this platform exists
Most AI strategy content is written for boards.
The frameworks are abstract. The tools are unnamed. The failure modes are never mentioned. And the people doing the actual work, the engineers, architects, and technology leaders making decisions every day, get a summary PDF and a keynote slide.
Delfen.ai is for the people doing the work.
Real HOW, not fake HOW.
Named tools. Specific configurations. Verdicts you can act on. Not "consider implementing an AI strategy."
From practice, not from research.
30 years making architecture decisions that shipped — at Fugro, NIBC, and Van Oord, not in a research paper. The judgment is earned, not synthesized.
Independent, and open about it.
Where an affiliate relationship exists, the article discloses it. The verdict is written first, and the disclosure never changes it.
What’s on the platform
Four ways to build judgment.
Practitioner deep-dives
AI-era technology decisions worked through to a verdict. Named tools. Specific configurations. No abstraction.
Browse the articlesAgent LogbookEvery AI agent needs a logbook
An open-source, tamper-evident logbook for AI agents. Records the actions, tool calls and human approvals your agent logs, on your own server, with any model. Apache 2.0, built in the Netherlands.
See the logbookNewsletterDelfen CTO update
Every Tuesday. Three to five developments for CTOs, CIOs and boards in financial and industrial organisations. Each is tied to a decision, with a question for your team. Free.
SubscribeBooksThe 10x Enterprise Architect with AI
The practitioner book series for the AI era. The 10x Enterprise Architect with AI — writing in progress.
The booksThe book series
The 10x Enterprise Architect with AI
The 10x Enterprise Architect with AI
AI creates. The architect leads.
Jacques Domenie · Delfen.ai
The 10x Enterprise Architect with AI
If you can’t beat them, lead them.
AI creates. The architect leads. The first book in the 10x Enterprise Architect with AI series — spanning all four architecture domains, for architects navigating the AI era without losing what makes them essential.
Not a beginner’s guide to AI. Not an executive summary. A practitioner’s playbook for the enterprise architect already deep in the work. It covers what changes, what stays the same, and how to lead a team through both.
Delfen CTO update
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