jidonglab

1 project a week. Building and sharing the entire process — from idea to shipped product in 7 days. Currently: AI news automation.

korea Joined on Feb 25, 2026 jee599@naver.com https://jidonglab.com/

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jidonglab

Mar 19

Claude Code Agent Teams Can Spawn Agents. It Just Doesn't Know Which Ones to Use.

#ai #claude #productivity #opensource

4 min read

jidonglab

Mar 6

What 100 Trending GitHub Projects Tell Us About Where AI Is Actually Going

#ai #opensource #productivity #webdev

4 min read

jidonglab

Mar 3

Anthropic Dropped 13 Free Courses — I Broke Down Every Single One

#ai #productivity #claude #beginners

3 min read

jidonglab

Aug 14

LLM-as-Judge Position Bias: Why Swapping A and B Flips Wins

7 min read

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jidonglab

Aug 13

GQA KV Cache Replication: Why TP=16 Doubles Your Memory

7 min read

jidonglab

Aug 12

MoE Expert Load Imbalance: Why Decode Stalls on One GPU

8 min read

jidonglab

Aug 12

Chunked Prefill: Why max_num_batched_tokens=512 Kills Throughput

7 min read

jidonglab

Aug 11

rsLoRA: Why LoRA alpha/r Scaling Kills High-Rank Fine-Tunes

7 min read

jidonglab

Aug 10

Sequence Packing: Why Cross-Document Attention Ruins Your SFT

7 min read

jidonglab

Aug 10

BM25 Length Normalization: Why Long RAG Chunks Never Rank

#algorithms #performance #rag #search

7 min read

jidonglab

Aug 9

Matryoshka Embedding Truncation: Why 256 Dims Breaks Thresholds

7 min read

jidonglab

Aug 9

Attention Entropy: Why Softmax Blurs Retrieval at 128k Context

7 min read

jidonglab

Aug 8

Digit Tokenization: Why a Comma Changes Your LLM's Math Answer

6 min read

jidonglab

Aug 8

Token Healing: Why a Trailing Space Breaks Your LLM Output

7 min read

jidonglab

Aug 7

Grammar-Constrained Decoding: Why Valid JSON Gets Wrong Answers

7 min read

jidonglab

Aug 7

KV Cache Preemption: Why vLLM Throughput Collapses Under Load

7 min read

jidonglab

Aug 7

Filtered Vector Search: Why Metadata Filters Break HNSW Recall

7 min read

jidonglab

Aug 4

Why Repetition Penalty Breaks JSON and Code Generation

7 min read

jidonglab

Aug 3

RoPE Scaling: Why Raising rope_theta Breaks Short Context

7 min read

jidonglab

Aug 3

Claude Prompt Caching: Why cache_read_input_tokens Stays 0

7 min read

jidonglab

Aug 2

Attention Sinks: Why Evicting Token 0 Wrecks Sliding-Window KV

7 min read

jidonglab

Aug 2

Why temperature=0 Still Gives Different Answers: Batch Invariance

7 min read

jidonglab

Aug 1

Speculative Decoding: Why 80% Acceptance Still Loses at Batch 64

8 min read

jidonglab

Aug 1

Why JSON Schema Field Order Breaks Structured Output Accuracy

#ai #llm #machinelearning #python

7 min read

jidonglab

Jul 31

Why INT4 Weight-Only Quantization Doesn't Speed Up Prefill

#llm #machinelearning #performance

7 min read

jidonglab

Jul 31

DPO Likelihood Displacement: Why Chosen Responses Get Rarer

7 min read

jidonglab

Jul 30

ColBERT Late Interaction: Why MaxSim Beats One Vector Per Chunk

7 min read

jidonglab

Jul 30

Surface Form Competition: Why Log-Prob Answer Scoring Fails

7 min read

jidonglab

Jul 29

Activation Outliers: Why W8A8 INT8 Quantization Needs SmoothQuant

8 min read

jidonglab

Jul 29

Cross-Encoder Reranker Score Calibration: Why 0.5 Cutoffs Fail

8 min read

jidonglab

Jul 28

MCP Tool Sprawl: Why 40 Tools Wreck Tool Selection Accuracy

7 min read

jidonglab

Jul 28

Why I measure interview silence with WebAudio, not the Speech API

#webaudio #javascript #webdev #ai

5 min read

jidonglab

Jul 28

Best-of-N Sampling: Why N=64 Scores Higher and Answers Worse

7 min read

jidonglab

Jul 28

Building an AI mock interviewer that tells you why you'd fail: what the turn engine taught me

#ai #webdev #javascript #career

5 min read

jidonglab

Jul 27

Reciprocal Rank Fusion: Why k=60 Buries Your Best Hit

7 min read

jidonglab

Jul 27

Hard Negative Mining Breaks Embedding Fine-Tunes Without Denoising

7 min read

jidonglab

Jul 26

LLM Eval Noise: Why Your 2-Point Accuracy Win Isn't Real

7 min read

jidonglab

Jul 26

Grouped Query Attention: Why 8 KV Heads Decide Your Batch Size

7 min read

jidonglab

Jul 25

Binary Quantized Embeddings: 32x Smaller, If You Center First

8 min read

jidonglab

Jul 25

MoE Capacity Factor: Why Mixture-of-Experts Drops Your Tokens

#deeplearning #llm #machinelearning #performance

8 min read

jidonglab

Jul 24

Hubness in Vector Search: Why One Chunk Tops Every RAG Query

7 min read

jidonglab

Jul 24

Min-p Sampling: Why top_p Truncates the Wrong Tail

6 min read

jidonglab

Jul 23

Chunked Prefill: Why One Long Prompt Stalls Every Decode

8 min read

jidonglab

Jul 22

Sequence Packing Leaks Across Documents Unless You Mask It

6 min read

jidonglab

Jul 21

KV Cache Quantization: Why Keys and Values Need Different Axes

6 min read

jidonglab

Jul 21

Multi-LoRA Serving: Why 100 Adapters Fit on One GPU

7 min read

jidonglab

Jul 20

Token Healing: Why a Trailing Space Wrecks LLM Completions

7 min read

jidonglab

Jul 20

Digit Tokenization: Why Commas Fix LLM Arithmetic

#ai #algorithms #llm #nlp

8 min read

jidonglab

Jul 19

Matryoshka Embeddings: Truncate Vector Dimensions, Keep Recall

7 min read

jidonglab

Jul 19

Why Filtered Vector Search Quietly Destroys HNSW Recall

7 min read

jidonglab

Jul 18

LLM-as-Judge Position Bias: Measure It Before You Ship

8 min read

jidonglab

Jul 18

YaRN vs NTK-Aware RoPE Scaling: Why Long Context Breaks

7 min read

jidonglab

Jul 17

Prompt Caching: How One Dynamic Token Kills the 90% Discount

7 min read

jidonglab

Jul 17

Attention Sinks: Why Streaming LLMs Break When You Evict Token 0

#deeplearning #llm #machinelearning #nlp

6 min read

jidonglab

Jul 16

Why Temperature 0 Doesn't Make Your LLM Deterministic

6 min read

jidonglab

Jul 16

Speculative Decoding: Why a Great Draft Model Still Caps Speedup

6 min read

jidonglab

Jul 15

Constrained Decoding: Force Valid JSON Without Wrecking Accuracy

6 min read

jidonglab

Jul 13

GRPO Explained: Why DeepSeek Dropped the Critic in RLHF

6 min read

jidonglab

Jul 12

Online Softmax: How FlashAttention Skips the N N Matrix

7 min read

jidonglab

Jul 12

Late Interaction Retrieval: Why ColBERT Beats Single-Vector RAG

7 min read

jidonglab

Jul 11

Why repetition_penalty Quietly Corrupts Your Code Generation

6 min read

jidonglab

Jul 11

DPO Likelihood Displacement: When Preferred Answers Get Rarer

6 min read

jidonglab

Jul 10

Why Token Logprobs Beat Asking Your LLM How Confident It Is

7 min read

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