░▓█∆λ∂π

I'm Li Yang. Some history:

GPT-3.5/4

Search, classifiers & RAG at GIC

2024

Graduated from NUS

Sonnet 3.5

Engineer #0 at brightriver.ai ; infra, agents, UI, ops, r&d

I like building tools that make my life (and the lives of people around me) easier. These days, that means agents.

From Kuala Lumpur, based in Singapore

Get in touch

[email protected] hewliyang @hewliyang

Recent GitHub Contributions

Pull Requests

open chore(ci): add cargo fmt check & fix existing violations vercel-labs/agent-browser open fix(native): use reqwest for CDP port discovery instead of broken hand-rolled HTTP client vercel-labs/agent-browser merged fix: suppress spurious --native warning when set via env var vercel-labs/agent-browser open Remove hidden Bloomberg shadow sheets daaa1m/ib-bench merged chore(cli): save screenshots to tmp dir when no path provided vercel-labs/agent-browser merged Add active path highlighting in html exports badlogic/pi-mono open feat(litellm): capture tool calls in streaming responses Arize-ai/openinference open feat(litellm): extract cost from litellm responses Arize-ai/openinference merged fix(unix): detect stale unix socket by attempting connection vercel-labs/agent-browser closed Add /resume slash command badlogic/pi-mono closed fix: add `traffic_access_token` to request headers e2b-dev/code-interpreter merged Fix reference to Python tool in README openai/gpt-oss closed ci(lint): black not running with check BerriAI/litellm closed fix(bedrock-converse): cache control not applied to messages with assistant or tool role BerriAI/litellm merged Add `model_request_stream_sync` to direct API pydantic/pydantic-ai merged fix(bedrock): wrong system prompt transformation BerriAI/litellm merged fix: claude haiku cache read pricing per token BerriAI/litellm open chore: xlsx improvements microsoft/markitdown merged fix: destructure oauth login url OllieJT/create-sva open fix typo in integer vocab analogy jaymody/blogposts

chore(ci): add cargo fmt check & fix existing violations

open vercel-labs/agent-browser

fix(native): use reqwest for CDP port discovery instead of broken hand-rolled HTTP client

open vercel-labs/agent-browser

fix: suppress spurious --native warning when set via env var

merged vercel-labs/agent-browser

Remove hidden Bloomberg shadow sheets

open daaa1m/ib-bench

chore(cli): save screenshots to tmp dir when no path provided

merged vercel-labs/agent-browser

Add active path highlighting in html exports

merged badlogic/pi-mono

feat(litellm): capture tool calls in streaming responses

open Arize-ai/openinference

feat(litellm): extract cost from litellm responses

open Arize-ai/openinference

fix(unix): detect stale unix socket by attempting connection

merged vercel-labs/agent-browser

Add /resume slash command

closed badlogic/pi-mono

fix: add `traffic_access_token` to request headers

closed e2b-dev/code-interpreter

Fix reference to Python tool in README

merged openai/gpt-oss

ci(lint): black not running with check

closed BerriAI/litellm

fix(bedrock-converse): cache control not applied to messages with assistant or tool role

closed BerriAI/litellm

Add `model_request_stream_sync` to direct API

merged pydantic/pydantic-ai

fix(bedrock): wrong system prompt transformation

merged BerriAI/litellm

fix: claude haiku cache read pricing per token

merged BerriAI/litellm

chore: xlsx improvements

open microsoft/markitdown

fix: destructure oauth login url

merged OllieJT/create-sva

fix typo in integer vocab analogy

open jaymody/blogposts

Issues

open Credential/Secret Brokering for HTTP(S) Requests e2b-dev/E2B open Pyodide support in browser vercel-labs/just-bash closed Daemon crash causes orphaned processes and connection failures vercel-labs/agent-browser closed HTML share sidebar entry onclick behavior badlogic/pi-mono closed Misleading bulk file uploads documentation e2b-dev/docs closed .run_code breaks when Sandbox.allow_public_traffic is False e2b-dev/code-interpreter closed Egress whitelist e2b-dev/E2B closed Migrating from 0.1.89 sheetxl/sheetxl closed Manual Caching (Anthropic) posit-dev/chatlas closed [Bug: Anthropic Bedrock Converse]: assistant & tool messages dropping cache points BerriAI/litellm closed sync method for direct api `model_request_stream` pydantic/pydantic-ai open `escape_special_characters` is not exhaustive character-ai/prompt-poet open difference in caching behavior between `Anthropic` and `AnthropicBedrock` anthropics/anthropic-sdk-python closed [Bug]: wrong price per token for haiku cache read BerriAI/litellm closed minimum area for images & vector graphics pymupdf/pymupdf4llm open mermaid temp files in subfolders not cleaned up quarto-dev/quarto-cli open [suggestion] waze backend Thevesh/traffic-monitor

Credential/Secret Brokering for HTTP(S) Requests

open e2b-dev/E2B

Pyodide support in browser

open vercel-labs/just-bash

Daemon crash causes orphaned processes and connection failures

closed vercel-labs/agent-browser

HTML share sidebar entry onclick behavior

closed badlogic/pi-mono

Misleading bulk file uploads documentation

closed e2b-dev/docs

.run_code breaks when Sandbox.allow_public_traffic is False

closed e2b-dev/code-interpreter

Egress whitelist

closed e2b-dev/E2B

Migrating from 0.1.89

closed sheetxl/sheetxl

Manual Caching (Anthropic)

closed posit-dev/chatlas

[Bug: Anthropic Bedrock Converse]: assistant & tool messages dropping cache points

closed BerriAI/litellm

sync method for direct api `model_request_stream`

closed pydantic/pydantic-ai

`escape_special_characters` is not exhaustive

open character-ai/prompt-poet

difference in caching behavior between `Anthropic` and `AnthropicBedrock`

open anthropics/anthropic-sdk-python

[Bug]: wrong price per token for haiku cache read

closed BerriAI/litellm

minimum area for images & vector graphics

closed pymupdf/pymupdf4llm

mermaid temp files in subfolders not cleaned up

open quarto-dev/quarto-cli

[suggestion] waze backend

open Thevesh/traffic-monitor