Context Engine
for AI Coding Agents
Persistent memory that survives across sessions. 2-3x more context in the same token window. Free for all developers.
No credit card required · Set up in 2 minutes
Your AI Can Write Code.
But It Forgets Everything.
Every new session starts from zero. Your agent re-discovers decisions, repeats failed approaches, and wastes tokens re-reading context it already processed.
Without Erold
- Every session starts from zero context
- Agent repeats failed approaches it already tried
- Context windows fill up with redundant information
- Manual copy-paste to preserve decisions
- Memory decays as it gets re-summarized
With Erold
- Compressed memory loads instantly every session
- Failed approaches recorded, never repeated
- 2-3x more context fits in the same window
- Passive hooks capture work automatically
- Re-compression resistant -- no fact decay
Why Choose Erold?
The only context engine purpose-built for AI coding agents. Not a PM tool with AI bolted on.
| Feature | Erold | Notion | Linear |
|---|---|---|---|
| Compressed persistent memory | |||
| Passive context capture (hooks) | |||
| Re-compression resistant storage | |||
| 2-3x context window efficiency | |||
| Privacy anonymization layer |
Everything You Need for
Persistent AI Memory
A complete context engine that gives your AI coding agent memory, compression, and privacy.
3 MCP Tools, Not 38
Agents spend time coding, not bookkeeping. Three focused tools replace dozens of granular ones -- get_context, save_memory, log_work.
Smart Strip Compression
2-3x more context in the same token window. Lossless fact extraction that survives unlimited re-compression cycles without drift.
Passive Capture
Hooks observe your agent's work silently. No manual updates, no workflow interruptions. Memory builds itself as you code.
Privacy Layer (RPA)
Anonymize code, names, and proprietary details before sending to external LLMs. Keep sensitive context local.
158+ Coding Guidelines
Lean, AI-optimized coding guidelines as structured data. Sharp rules that agents apply instantly. Community-contributed and always growing.
Re-compression Resistant
Memory stays accurate through unlimited compression cycles. No fact loss, no hallucinated drift, no decay over time.
Works With Your Favorite
AI Tools & IDEs
3 MCP tools that work with any MCP-compatible agent. One config command, instant persistent memory.
claude mcp add-json erold '{
"command": "npx",
"args": ["-y", "@erold/mcp-server@latest"],
"env": {
"EROLD_API_KEY": "your_key",
"EROLD_TENANT": "your_tenant"
}
}' --scope user
Get Started in
Three Simple Steps
Give your AI agent persistent memory in under 2 minutes.
Connect Your Agent
Add Erold as an MCP server to Claude Code, Cursor, or any MCP-compatible tool. Three tools, zero configuration overhead.
claude mcp add-json erold '{
"command": "npx",
"args": ["-y", "@erold/mcp-server@latest"],
"env": {
"EROLD_API_KEY": "your_key",
"EROLD_TENANT": "your_tenant"
}
}' --scope userAgent Works, Erold Remembers
Hooks passively capture what your agent does. Decisions, failed approaches, file changes -- all compressed into persistent memory.
> Claude builds OAuth implementation...
hook: session_end → compressing transcript
Smart Strip: 4,200 tokens → 1,680 tokens (2.5x)
✓ Saved: auth approach, failed attempts, final solution
✓ Memory survives across sessionsNext Session Starts Smart
Your agent loads compressed context automatically. It knows what was tried, what failed, and what worked -- no re-explanation needed.
> "Claude, continue the OAuth work"
Loading context via get_context...
✓ Previous session: OAuth with PKCE chosen
✓ Known: bcrypt rejected (too slow for edge)
✓ Known: /src/auth/provider.ts needs tests
Ready. Continuing from where you left off.
Watch Smart Strip
Compression In Action
See how Erold compresses session context, builds persistent memory, and loads it across sessions.
Quick Demo: Smart Strip Context Engine
See compression, memory, and context loading in action
Free Forever.
Full Context Engine.
Smart Strip compression, persistent memory, and 158+ guidelines. Free for every developer.
Free
Full context engine for solo developers
- Smart Strip compression (2-3x)
- 3 MCP tools + passive hooks
- Persistent memory across sessions
- All 158+ coding guidelines
- Unlimited projects
- Claude Code, Cursor, Windsurf
- Bring your own AI API key
Team
Shared memory across your team
- Everything in Free
- Shared compressed knowledge base
- Team memory deduplication
- Managed cloud infrastructure
- Priority support
- 99.9% uptime SLA
Enterprise
Privacy layer, compliance, on-premise
- Everything in Team
- RPA privacy anonymization
- EU data residency
- SOC 2 compliance
- SSO / SAML
- On-premise deployment
- Dedicated support + custom SLA
3 focused MCP tools. Smart Strip compression, passive hooks, and re-compression resistant memory. Learn more →
Frequently Asked
Questions
Everything you need to know about Erold and persistent AI memory.
Still have questions?
Contact our team
Ready to Give Your Agent
Persistent Memory?
Join developers using Erold to give Claude Code, Cursor, and other AI agents compressed, persistent context.
Free forever · No credit card required