ddz.dev valid

ddz.dev

Legacy modernization and software consulting by Dušan Dželebdžić. I connect decades-old systems to modern infrastructure, migrate what's ready, and keep the rest running. I also fix broken systems and build custom software for industrial settings. 30 years of experience. For larger projects I bring in a network of trusted specialists (full-stack architects, pentesters, frontend developers) while staying the single point of contact and responsibility.

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-25T00:01:33.295Z. Cached copy · Source on ddz.dev

# ddz.dev

> Legacy modernization and software consulting by Dušan Dželebdžić. I connect decades-old systems to modern infrastructure, migrate what's ready, and keep the rest running. I also fix broken systems and build custom software for industrial settings. 30 years of experience. For larger projects I bring in a network of trusted specialists (full-stack architects, pentesters, frontend developers) while staying the single point of contact and responsibility.

## Services

- [Legacy Modernization](https://ddz.dev/): the strongest offer. Keeping critical old systems alive and connected while the business moves forward: integrations with modern infrastructure, data extraction and migration off legacy platforms, and staged retirement. Covers everything from OpenVMS to aging PHP monoliths.
- [Custom Development](https://ddz.dev/): custom web apps, mobile apps, and integrations, mostly for industrial settings. Design, build, and ship, backed by 30 years of experience.
- [Software Consulting](https://ddz.dev/): emergency fixes, system audits, and ongoing support for production systems, infrastructure, and integrations between systems that don't talk to each other.
- [OpenVMS Consulting](https://ddz.dev/openvms/): the deepest legacy end covered. Maintenance, debugging, and modernization of OpenVMS systems. COBOL, RMS, Rdb, DCL, and integration with modern infrastructure. Remote-first, worldwide.

## About

- [Homepage](https://ddz.dev/)
- [About](https://ddz.dev/about/)

## Blog

- [Guideline 5.1.1(iv): App Review rejected my first app over one word](https://ddz.dev/blog/app-store-guideline-5-1-1-iv-enable-button/)

- [Executable doesn't exist at webkit-2336: the iPhone in your Playwright config](https://ddz.dev/blog/playwright-iphone-device-needs-webkit/)

- [Next.js wrote AGENTS.md into my repository](https://ddz.dev/blog/nextjs-wrote-agents-md/)

- [The official IANA RDAP bootstrap file failed my validator](https://ddz.dev/blog/iana-rdap-bootstrap-validator/)

- [OpenVMS DCL: SET NOON doesn't apply inside CALL subroutines](https://ddz.dev/blog/openvms-dcl-set-noon-call-subroutine/)

- [504 Gateway Timeout: the N+1 was on the filesystem](https://ddz.dev/blog/504-gateway-timeout-filesystem-n-plus-one/)

- [Apache kept timing out while the server sat idle](https://ddz.dev/blog/apache-timing-out-cpu-memory-idle/)

- [Detecting the environment by subnet doesn't survive a DR failover](https://ddz.dev/blog/dr-failover-breaks-subnet-environment-detection/)

- [Restate: the awakeable resolves fine, but the workflow never resumes](https://ddz.dev/blog/restate-awakeable-resolves-but-workflow-never-resumes/)

- [git push: "[remote rejected] master -> master (Internal Server Error)" is GitHub's problem, not your commits](https://ddz.dev/blog/git-push-remote-rejected-internal-server-error/)

- [You can't remove the last tag from a Tailscale machine, but you can swap it](https://ddz.dev/blog/tailscale-remove-last-tag-from-machin
…

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Claim my listing on Agent Web Map for ddz.dev:
1. POST https://agentwebmap.com/v1/sites/ddz.dev/claims and keep claim_id and claim_secret private.
2. Publish the verification line "AgentWebMap verification: <token>" (token from step 1) in https://ddz.dev/llms.txt, or use the DNS, meta-tag or well-known method the response describes. This only verifies the listing; your website and domain remain yours.
3. POST https://agentwebmap.com/v1/sites/ddz.dev/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/ddz.dev).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

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