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rioyu123/README.md

Hey, I'm Rio. 👋

Building for an agent-first world.

With a decade of hands-on engineering—from global enterprises to AI infrastructure—I now focus on AI agents and the systems behind them.

Curious by default. Grounded in engineering. Interested in what's next—and what it takes to make it work.

What I'm focused on

  • AI Agents: Making intelligent systems useful in practice.
  • Developer Infrastructure: Better foundations for building with AI.
  • Open Source: Contributing to the tools behind the ecosystem.

I'm also interested in fintech—and the underlying infrastructure that moves value.

Selected open-source contributions

Merged

Project Technical contribution & impact
Google MCP Security #287 Enabled end-to-end SecOps workflows by exposing alert IDs for detail/update calls and verdicts for first-pass triage without changing the response shape
NVIDIA SkillEvaluator #109 Expanded dead-link coverage to CommonMark reference links, HTML anchors, and images while suppressing code/comment false positives and containing per-link failures
Microsoft Agent Lightning #573 Prevented request loss when providers omit prompt token IDs or return malformed values, while preserving last-wins deduplication for valid retries and VERL image alignment
NVIDIA SkillEvaluator #84 Eliminated false agent-runtime failures caused by verifier and health-check exceptions matching ordinary transcript text, improving Tier 3 diagnostic accuracy
NVIDIA SkillEvaluator #106 Made required Gitleaks checks deterministic and fail-closed on shallow or invalid history while retaining repository-wide scheduled audits
Burn #5494 Ensured extensionless Burnpack paths survive direct and atomic saves, overwrite protection, exact loads, and store round trips without silently switching to sibling .bpk files
Technocore #135 Closed a side-effect vulnerability where HEAD could append messages, write notes, or spend signed nonces, while preserving HEAD on read-only routes

In review

Project Technical contribution & impact
NVIDIA SkillEvaluator #129 Turns parser, encoding, recursion, and I/O failures into concise path-specific CLI errors, preventing raw exceptions or silent fallback from obscuring invalid policy input
NVIDIA SkillSpector #467 Makes recursive JSON safe for shell pipelines: stdout stays parseable while progress and advisories move to stderr, including partial child-scan failures
NVIDIA SkillSpector #463 Restores CLI provider configurability by honoring SKILLSPECTOR_MODEL_REGISTRY for Claude, Codex, and Gemini while preserving safe fallbacks
NVIDIA SkillEvaluator #107 Closes a dependency-policy blind spot where PEP 508 marker operators could hide unpinned packages, without changing direct-reference behavior
OpenAI Agents SDK #4739 Ensures numeric and string constraints on *args and **kwargs are enforced in JSON schemas and at runtime, rejecting invalid tool inputs before invocation
Claude Agent SDK #1237 Prevents silent partial session migrations by surfacing subagent I/O failures and blocking symlink cycles, aliases, and external traversal while retaining relocated roots
Claude Agent SDK #1238 Guarantees one logical subagent ID per listing across duplicate disk paths, aligning filesystem/store behavior while preserving discovery order
NVIDIA NeMo Evaluator #1153 Prevents incorrect cache hits between requests that differ by response format, tools, streaming mode, path, or other output-affecting fields without requiring a schema migration
Stripe AI #509 Stops abandoned streams from being drained by background metering tasks, closing upstream requests promptly while preserving provider stream APIs and lazy consumption

Status checked on September 1, 2026. Browse all of my pull requests.

Python, Go, Rust, and TypeScript are the tools I reach for most. The interesting part is making the pieces work together.

Pinned Loading

  1. claude-agent-sdk-python claude-agent-sdk-python Public

    Forked from anthropics/claude-agent-sdk-python

    Python

  2. openai-agents-python openai-agents-python Public

    Forked from openai/openai-agents-python

    A lightweight, powerful framework for multi-agent workflows

    Python

  3. SkillEvaluator SkillEvaluator Public

    Forked from NVIDIA/SkillEvaluator

    Multi-tier framework for evaluating AI agent skills with quality gates, semantic overlap detection, synthetic evaluation dataset generation, and live agent evaluation that measures how skills affec…

    Python

  4. burn burn Public

    Forked from tracel-ai/burn

    Burn is a next generation tensor library and Deep Learning Framework that doesn't compromise on flexibility, efficiency and portability.

    Rust

  5. Huabu Huabu Public

    Forked from microsoft/Huabu

    Huabu, where you and your agents think together.

    TypeScript

  6. RAMPART RAMPART Public

    Forked from microsoft/RAMPART

    A pytest-native safety and security testing framework for agentic AI applications

    Python