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Mahesh Murag (builder of MCP and Skills) says “vibe coders are running 15 Claude…

2026-08-07 · 19:18 UTC ·@phosphenq ·1 min read

Brief

Mahesh Murag demos Anthropic’s fix for agent memory: instead of a vector DB, they use Markdown files plus Bash/grep and a single batch pass over prior transcripts to share learnings. Rakuten deployed it and cut first-pass agent mistakes by 90%. The author also ran 105 Claude Code agents (5,044,822 tokens, 36 minutes) to illustrate scale.

Why it matters

Mahesh Murag (builder of MCP and Skills) says “vibe coders are running 15 Claude Code sessions at once, and not one of them shares what it learned.” Anthropic’s 23-minute demo shows the fix is NOT a database but Markdown files + Bash + grep + one batch pass over yesterday’s transcripts (published 2026-08-07).

Key details

  • Rakuten put this simple file-based memory system into production and reported a 90% drop in first-pass agent mistakes.
  • Claude Code can spawn massive agent runs: the author ran 105 agents on one question (5,044,822 tokens, 36 minutes). Video timestamps: 00:00 (primitives since MCP + one missing), 04:25 (why CLAUDE.md isn’t real memory), 07:45 (preventing file-overwrite by many agents), 21:24 (cross-agent pattern and Dreaming).
Cleaned source text

Mahesh Murag, who built MCP and Skills:

"vibe coders are running 15 Claude Code sessions at once, and not one of them shares what it learned."

in 23 minutes he shows what Anthropic shipped to fix exactly that, and it is not a database.

Markdown files + Bash and Grep + one batch pass over yesterday's transcripts - that is the entire memory system.

Rakuten put it in production and first-pass mistakes in their agents dropped 90%

→ 00:00 - every primitive Anthropic shipped since MCP, and the one they admit is still missing

→ 04:25 - why CLAUDE.md was never really memory, said by the team that shipped CLAUDE.md

→ 07:45 - what stops a thousand agents from overwriting the same memory file, and almost nobody builds it

→ 21:24 - the pattern no single agent could see, and what Dreaming did with it overnight

worth more than the vector database bill you are paying to solve this exact problem

watch it, then read the Graph Engineering guide i wrote after pointing 105 agents at one question below.

Video

Phosphen (@phosphenq)

Article

How to Graph Engineering: The Complete Guide

Claude Code ships a feature that spawns 105 agents on a single question. I ran it this week. It cost 5,044,822 tokens and took 36 minutes.

Most people who use Claude Code every day have never run one.

— https://nitter.net/phosphenq/status/2083991226827567419#m