workflowstacks
mcp-server

deja-vu: Recall Solutions

Find previously solved problems with deja-vu, a tool for startup founders using coding agents. Boost productivity with retroactive search.
796 stars68 forksGoGuide quality 8/10Updated 9/9/2026100% free · open source
What it does

Deja-vu helps startup founders find previously solved problems by their coding agents using retroactive search, boosting productivity

When to use it
  • •When you have multiple coding agents working on similar problems and want to avoid duplicated effort
  • •When you need to recall a previously solved problem but can't remember the exact solution
  • •When you want to measure the impact of your coding agents' work and identify areas for improvement
Ready-to-paste prompt
./deja-vu -query 'error handling in Go' -agents myagent1,myagent2
Heads up: Make sure you have the correct runtime version of Go installed, as deja-vu is built with Go and may not be compatible with older versions
Saves to your device
Use with Claude
New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install
Claude Code
mkdir -p ~/.claude/skills/deja-vu && curl -fsSL https://workflowstacks.com/api/skills/deja-vu/claude-skill -o ~/.claude/skills/deja-vu/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How deja-vu: Recall Solutions works
Codeflow
Free to inspect

Deja-vu: Recall Solutions is a very large project (~264k lines across 2097 code files, plus 14 test files). You install it into your AI tool with one command; there is nothing to run yourself. Last commit this month, MIT license, has a test suite.

Size
Very large codebase
~264k lines · 2097 code files · days to read — use, don't read
Setup
Install as a skill / plugin
Add it to Claude Code (or your AI tool) with one command — 5 skills inside. Nothing to run yourself.
Runs on
Inside your AI tool
Helper scripts use Node.js · Go · Docker
Where to start reading
  1. 1
    README.md
    Start here — what it does and how to install it
  2. 2
    cmd/deja/main.go
    Where the program starts running
  3. 3
    internal/index/index.go
    Inside internal/ — the main logic begins here
What's in each folder
internal/Core code — the actual logic851 files
skills/Prompts, skills & agent definitions1 files
cmd/Command-line entry points1168 files
extensions/Sub-packages / plugins56 files
docs/Documentation127 files
scripts/Helper scripts59 files
fixtures/Data files42 files
codex-plugin/Folder11 files
READMEHas testsDocumentedCI checksDocker readyMIT licenseUpdated this month
Quick Actions
Details
Creator
vshulcz
Language
Go
Category
mcp-server
Published
7/14/2026

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