agent-skillsai-note-takingai-second-brainclaude-codeclaude-code-skillclaude-memoryclaude-pluginkarpathy-llm-wikiknowledge-graphknowledge-managementnote-takingnotion-alternativeobsidianobsidian-aiobsidian-pluginobsidian-second-brainopen-sourcepersonal-knowledge-managementpkmsecond-brain
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