Best AI agent for knowledge and memory
Which agents people actually use for knowledge and memory, counted from 14 real use cases, with the top examples for each.
Going by documented use cases, not a lab test: of the 14 knowledge & memory use cases on agentsetups, Claude appears in 8, Hermes Agent appears in 3, Codex appears in 3.
Most-discussed: Give agents documentation instead of memory plugins by liao.gg (Claude).
Quick start (from Give agents documentation instead of memory plugins by liao.gg):
- Create an internal/ folder; ask the agent to write down specs, plans and indexes there.
- Task it to always read the relevant docs and index before working, and update them afterwards.
- Documentation is written by the working agent while the work is fresh.
Counts reflect what people post about, not quality or market share.
Last updated · based on 336 use cases on agentsetups, each credited to its author.
Agents by use cases
Claude for knowledge & memory 8
- Give agents documentation instead of memory plugins
Have the agent keep specs, plans and indexes in an internal/ folder, read before work and update after.
Claude · Knowledge & memory · by liao.gg (blog, 3 Oct 2026) · source
- Pick an agent memory system with your own benchmark
1,800 tasks across 12 memory systems with Claude Code: a plain Markdown wiki tied for first (97.1/100).
Claude · Knowledge & memory · by /u/Major-Shirt-8227 (Reddit, 18 Sep 2026) · source
- Give agents a crawler that saves docs as Markdown
pulpie-mcp saved 60 doc pages as clean Markdown in ~49s with a local 210M model, writing files instead of flooding context.
Claude, Codex · Knowledge & memory · by Jessica Doering (DEV post, 5 Oct 2026) · source
Hermes Agent for knowledge & memory 3
- Mine hundreds of agent sessions for consequential moments
A Hermes plugin developer had the agent review 491 sessions for “consequential moments”.
Hermes Agent · Knowledge & memory · by mr_r0b0t (X post, 11 Oct 2026) · source
- Give Hermes a long-term memory graph
Seeding the Hindsight memory plugin cost $0.85 on DeepSeek Flash; day-to-day extraction then ran on local models with a fallback.
Hermes Agent · Knowledge & memory · by /u/PoppaBear1950 (Reddit, 26 Sep 2026) · source
- Run an AI OS on Hermes with an Obsidian graph
Hermes runs 24/7 across 8 domains via Telegram; a desktop AI builds; every rule and SOP is saved as a note in Obsidian.
Hermes Agent · Knowledge & memory · by MGDigital (X post, 13 Sep 2026) · source
Codex for knowledge & memory 3
- Give agents a crawler that saves docs as Markdown
pulpie-mcp saved 60 doc pages as clean Markdown in ~49s with a local 210M model, writing files instead of flooding context.
Claude, Codex · Knowledge & memory · by Jessica Doering (DEV post, 5 Oct 2026) · source
- Turn Instagram bookmarks into a searchable diary
Built with Codex + Muse Spark: an agent goes through all your saved Instagram posts and turns them into a searchable diary.
Codex, Meta Muse · Knowledge & memory · by Priyaa (X post, 8 Sep 2026) · source
- Extract your memories from thousands of chats
Instead of an agent run, a builder had Opus 5.5 extract memories across Claude, Cursor and Codex chats to stay portable.
Claude, Codex, Cursor · Knowledge & memory · by shawn (X post, 6 Oct 2026) · source
Meta Muse for knowledge & memory 2
- Turn Instagram bookmarks into a searchable diary
Built with Codex + Muse Spark: an agent goes through all your saved Instagram posts and turns them into a searchable diary.
Codex, Meta Muse · Knowledge & memory · by Priyaa (X post, 8 Sep 2026) · source
- Give Instinct, Muse and Grok Bot one shared memory
@trevin deployed his own Energon instance, installed its skill in each agent and minted each its own API key.
Grok Bot, Meta Muse, Instinct · Knowledge & memory · by Trevin Chow (X post, 18 Sep 2026) · source
Grok Bot for knowledge & memory 2
- Give your trading bot an Obsidian second brain
Grok Bot and Claude Code built a 28,728-file vault from scattered charts, screenshots and notes; it then refused a trade.
Claude, Grok Bot · Knowledge & memory · by Spike 1% (X post, 4 Sep 2026) · source
- Give Instinct, Muse and Grok Bot one shared memory
@trevin deployed his own Energon instance, installed its skill in each agent and minted each its own API key.
Grok Bot, Meta Muse, Instinct · Knowledge & memory · by Trevin Chow (X post, 18 Sep 2026) · source
Questions people ask
What is the best AI agent for knowledge and memory?
There is no single winner in the data. Of 14 knowledge & memory use cases on agentsetups, Claude (8), Hermes Agent (3), Codex (3), Meta Muse (2). Pick the one whose examples look most like your task.
Which AI agents do people use for knowledge and memory?
From the sources: Claude (8), Hermes Agent (3), Codex (3), Meta Muse (2), Grok Bot (2), Cursor (1), Instinct (1), OpenCode (1).
How do I set up an AI agent for knowledge and memory?
Copy a setup that already worked. Give agents documentation instead of memory plugins by liao.gg (Claude): 1) Create an internal/ folder; ask the agent to write down specs, plans and indexes there. 2) Task it to always read the relevant docs and index before working, and update them afterwards. 3) Documentation is written by the working agent while the work is fresh. The use-case page has the full prompt.
Claude vs Codex for knowledge and memory?
Claude has 8 and Codex has 3 knowledge & memory use cases here. Compare them side by side.