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+---
+date: 2026-03-09T14:38:59.721Z
+title: "Memex Chat: Obsidian Plugin I built for myself"
+summary: I've been using Obsidian for years as my primary thinking environment. At some point I got tired of switching between my notes and AI tools, copy-pasting context back and forth. So I built something that works the way I actually think.
+category:
+  - dev
+  - AI
+mpSyndicateTo:
+  - https://blog.giersig.eu/
+visibility: public
+updated: 2026-03-09T14:39:09.710Z
+permalink: https://blog.giersig.eu/articles/memex-chat-obsidian-plugin/
+ai:
+  textLevel: "1"
+  codeLevel: "3"
+  aiTools: "Claude, Copilot"
+  # aiDescription: "Optional disclosure about how AI was used"
+---
+
+Memex Chat is an Obsidian plugin that lets you chat with your vault using Claude AI with proper context retrieval, not just keyword search.
+
+What it does:
+
+- Semantic vault search — a TF-IDF index over all your notes, no external API needed for retrieval
+- Local embeddings — optional on-device semantic search using BGE Micro v2, fully offline after one model download (~22 MB)
+- Auto context — relevant notes are automatically found and attached to your query before it even reaches Claude
+- @ mentions — reference specific notes directly in your message with autocomplete
+- Context preview — see and edit which notes are included before sending
+- Related notes sidebar — always-on panel showing the most similar notes to whatever you have open, ranked by semantic similarity, frontmatter links, and shared tags
+- Thread history — chats saved as Markdown in your vault, so nothing disappears
+- Source links — every answer shows which notes were used as context
+- Prompt buttons — configurable header buttons that extend Claude's system prompt (e.g. draft check, monthly review)
+
+Installation is manual for now — download main.js, manifest.json, and styles.css from the latest release, drop them into .obsidian/plugins/memex-chat/, enable in Community Plugins, and add your Anthropic API key.
+
+→ https://github.com/svemagie/memex-chat