Make Claude remember project decisions with an Obsidian vault
A builder pairs Claude Opus 5 with an Obsidian vault and Jev so notes live in a folder you own, Claude turns them into project pages, and decisions from last week do not need repeating.
Source
@thegreatest_sv on X · 2026-10-15
Written in our own words. Credit to the original author. Link checked 2026-10-22.
What they did
A builder pairs Claude Opus 5 with an Obsidian vault and Jev so notes live in a folder you own, Claude turns them into project pages, and decisions from last week do not need repeating.
Result (as claimed)
Claude keeps context on decisions across sessions (122 likes).
Tools they used
Cost: Claude Opus 5.5: from $4 in / $20 out per 1M tokens.
Set it up
Define the job
Say exactly what you want done and what the agent may and may not do on your behalf.
Share only what is needed
Give Claude Opus 5.5 the minimum files or access required. Avoid sharing passwords in chat when a safer login flow exists.
Review the plan
Ask the agent to show its plan or draft before it acts, and approve each step that has real consequences.
Check the result
Confirm the outcome yourself (order placed, request sent, document understood) and keep a record.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Make Claude remember project decisions with an Obsidian vault What the original author did: A builder pairs Claude Opus 5 with an Obsidian vault and Jev so notes live in a folder you own, Claude turns them into project pages, and decisions from last week do not need repeating. Reported result (as claimed by the author): Claude keeps context on decisions across sessions (122 likes). Source: https://x.com/thegreatest_sv/status/2110700212960309417 Tools they used: Claude Opus 5.5, Obsidian, Jev Category: Personal & life Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Make Claude remember project decisions with an Obsidian vault What the original author did: A builder pairs Claude Opus 5 with an Obsidian vault and Jev so notes live in a folder you own, Claude turns them into project pages, and decisions from last week do not need repeating. Reported result (as claimed by the author): Claude keeps context on decisions across sessions (122 likes). Source: https://x.com/thegreatest_sv/status/2110700212960309417 Tools they used: Claude Opus 5.5, Obsidian, Jev Category: Personal & life Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Make Claude remember project decisions with an Obsidian vault What the original author did: A builder pairs Claude Opus 5 with an Obsidian vault and Jev so notes live in a folder you own, Claude turns them into project pages, and decisions from last week do not need repeating. Reported result (as claimed by the author): Claude keeps context on decisions across sessions (122 likes). Source: https://x.com/thegreatest_sv/status/2110700212960309417 Tools they used: Claude Opus 5.5, Obsidian, Jev Category: Personal & life Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to build an AI second brain and personal wiki · How to use AI agents with Obsidian and your notes · How to secure vibe-coded apps and agents · How to automate work with n8n and AI
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