SDevLabs
STRATEGIC DEVELOPMENT LABS
Exploring technology through independent development, experimentation, and open-source innovation. Built as a hobby, developed with the assistance of AI, and shared with the community.
Writing
Insights from independent research, technical development, and experimentation. Documenting discoveries, lessons learned, practical implementations, and findings worth sharing with the community.
Nothing published yet.
Repositories
Five Python libraries, all MIT licensed, all usable independently. Install from source; nothing here asks for an account or a key.
Give AI agents a verifiable on-chain identity. W3C DID
(did:xrpl) plus XLS-70 Verifiable Credentials on the
XRP Ledger — issue, accept, and verify. ERC-8004-style, without
the EVM.
pip install "xrpl-agent-id @ git+https://github.com/DuNorth595/xrpl_agent_id.git@v0.5.4"Tamper-evident append-only history log for AI agents on the XRP Ledger. Hash-chained, mutually signed, replayable from public data alone.
pip install "xrpl_agent_log @ git+https://github.com/DuNorth595/xrpl_agent_log.git@v0.4.0"
MCP server for did:xrpl — W3C-compatible agent identity
on the XRP Ledger, exposed to any Model Context Protocol client.
pip install "xrpl-did-mcp @ git+https://github.com/DuNorth595/xrpl_did_mcp.git@v0.6.0"Full-duplex voice assistant you can talk over. Talk while it is speaking and it keeps going, catches what you said, and answers once it finishes. Push-to-talk over your phone. Local Whisper STT and Piper/Kokoro TTS.
git clone https://github.com/DuNorth595/ai_agent_chat.gitLong-term memory for AI agents that survives between sessions. One index file, one pointer per topic, everything else plain Markdown.
git clone https://github.com/DuNorth595/ai_agent_memory.gitOpen
Three threads running at once — verifiable identity on a public ledger, AI that lives on your own devices, and agent capabilities that can be reviewed and shared. Plus an open door for anything else.
Identity, credentials, and tamper-evident audit on a chain that settles in seconds. The libraries are released; the next layer is making them compose — agents that hold verifiable identity and can prove what they did, without asking anyone to trust them.
Phones that talk to the network on your behalf — push-to-talk agents you can interrupt, radio and dispatch tools that live in your pocket, and assistants that run on-device instead of in someone else's cloud. Everything still yours when the connection drops.
Skills as portable, reviewable, shareable units — a directory an agent can read and another can trust. The same discipline that made a library worth installing: clear scope, a way to verify it, a way to take it apart.
A ledger nobody has built yet, a tool that should exist, a problem you keep working around, a dataset worth sharing, or a collaboration that would be better with two people on it. No pitch required — a sentence is enough to start.
Submit an idea Ideas, projects, collaborations, or something you want built — all welcome.
Get in touch
Bug reports, ideas, questions, or a correction to something I've written — all welcome.
Support
Everything here is open source and free to use — no accounts, no keys, no usage fees. If something saved you time, you can chip in to keep it maintained.
Scan with Xaman
Send XRP directly. The address is fixed, the amount is yours to choose, and it goes straight to the wallet — no platform taking a cut in the middle.
rJJbLMx9TTp1Yi9LzrrafXKcKT9WkaGMUd
Prefer code? The projects are on GitHub — issues, patches, and PRs are all welcome too.
S_DevLabs (sdevlabs.dev) and the projects published through this website are independently owned, managed, and maintained by Justin Douglas, with development assistance from artificial intelligence (AI) agents.
All projects, software, and tools are provided for research, experimentation, education, and independent development purposes.
These projects are not represented as enterprise-grade, institutional-grade, or production-ready solutions. Unless explicitly stated otherwise, they have not undergone independent security audits, penetration testing, formal certification, or production-level validation.
The tools are provided as development resources and are not intended to serve as turnkey production systems.
Individuals and organizations choosing to use, modify, integrate, or deploy these projects assume full responsibility for their implementation and operating environments.
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Use of any published software, tools, or resources is entirely at your own risk.