KernelWiki CLAUDE.md

Instructions for navigating KernelWiki, a knowledge base about optimizing GPU kernels for NVIDIA Blackwell and Hopper hardware. It explains the knowledge base’s structure and recommends scripts and indexes for finding pages by architecture, problem, technique, hardware feature, kernel type, or language.

In plain words
What is it for?
Use it to query the knowledge base, open specific pages, follow source links, and locate guidance for a GPU architecture, optimization problem, technique, or programming language.
Why use it?
It gives an agent a consistent way to find relevant kernel-optimization information instead of searching the repository blindly.

Instructions file

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/mit-han-lab/kernelwiki/claude-md
Clone the repo
git clone --depth 1 https://github.com/mit-han-lab/KernelWiki
Per session 1,556 This file is loaded in full into every session.
When invoked 1,556 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.01556 $0.01556
Opus 5 $0.00778 $0.00778
Sonnet 5 $0.00311 $0.00311
Haiku 4.5 $0.00156 $0.00156

Measured 3d ago against content hash bb104cd6faa9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

KernelWiki CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blackwell Kernel Optimization Knowledge Base — Schema

A structured knowledge base of GPU kernel optimization for NVIDIA Blackwell (SM100) and Hopper (SM90), optimized for LLM agent retrieval.

Recommended: use the skill scripts

python3 scripts/query.py "<keywords>" [--tag X --type Y]
python3 scripts/get_page.py <id-or-path> [--follow-sources]
python3 scripts/grep_wiki.py "<pattern>" [--only wiki]

See SKILL.md (skill entry point) and references/examples.md for query patterns.

Direct navigation (when skill not available)

  1. Start: Read index.md for curated top-level navigation
  2. By architecture: Read queries/by-architecture.md → choose exact, family-only, or validated-unknown evidence
  3. By problem: Read queries/by-problem.md → find symptom → follow links to pattern pages
  4. By technique: Read queries/by-technique.md → find technique → follow to technique page
  5. By hardware: Read queries/by-hardware-feature.md → find feature → follow to hardware page
  6. By kernel type: Read queries/by-kernel-type.md → find type → follow to kernel pages
  7. By language: Read queries/by-language.md → find DSL → follow to language page
  8. By repo: Read queries/by-repo.md → find repository → see all PRs
  9. Deep dive: From any wiki page, follow sources: IDs to raw source data

Three-Layer Architecture

Layer 1: Sources (sources/)

Raw data. Each file has YAML frontmatter with a unique id.

  • sources/prs/{repo}/PR-{N}.md — One file per relevant PR
  • sources/contests/{contest}/*.md — Competition problem definitions, organizer speed-of-light data, and dated leaderboard/results snapshots (no per-submission solutions)
  • sources/docs/*.md — Official-document and research-paper summaries (source_category: official-doc or paper); sources/docs/images/ holds reproduced figure assets
  • sources/blogs/*.md — Community blog post summaries

Layer 2: Wiki (wiki/)

Synthesized knowledge pages. Cross-referenced by id.

  • wiki/hardware/ — Hardware feature pages (tcgen05, TMEM, CLC, TMA, etc.)
  • wiki/techniques/ — Optimization techniques (warp specialization, pipelining, etc.)
  • wiki/patterns/ — Problem → solution diagnosis (low SM util → CLC, etc.)
  • wiki/kernels/ — Kernel case studies (FlashAttention-4, DeepGEMM, etc.)
  • wiki/languages/ — DSL/language guides (CuTe DSL, Triton, CUDA C++, PTX)
  • wiki/migration/ — Hopper → Blackwell migration patterns

Read the full file on GitHub · 122 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 122 lines · 1,556 tokens per session scan A bb104cd6faa9

Subscribe to this mod's changes

KernelWiki CLAUDE.md is an instructions file published in the GitHub repository mit-han-lab/KernelWiki (419 stars, last pushed 7d ago), licensed MIT. It adds 1,556 tokens to every session, about $0.0078 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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