For Claude Code users·30-second install

Your Claude Code agent, with a memory that survives.

One line in .mcp.json and Claude Code can recall decisions, mistakes, and context across every session, every project, forever. Sub-100ms. Free tier, no card.

Get a free API key Jump to install

Cross-project

Remembers across repos

Decisions you made in repo A are recallable from repo B. No copy-pasting CLAUDE.md across projects.

Auto-recorded

Zero-boilerplate capture

neruva-record installs as a Claude Code hook. Every session, every tool call, every decision — captured.

Secrets-safe

Redacted client-side

14-pattern leak guard before bytes leave your machine. Keys, tokens, secrets — never recorded.

30-second install

Two ways to wire it in.

Option A · MCP server

52 tools, hand-callable

Add to ~/.config/claude-code/.mcp.json (or your project's). Restart Claude Code. Tools show up under the neruva namespace.

{
  "mcpServers": {
    "neruva": {
      "command": "npx",
      "args": ["-y", "@neruva/mcp@latest"],
      "env": { "NERUVA_API_KEY": "<your-key>" }
    }
  }
}

Option B · auto-record hook

Zero-touch session capture

Adds a Claude Code hook that records every session as typed events. Recall surfaces in your next conversation automatically.

# pip install neruva-record
# adds a Claude Code hook that auto-records every session
python -m neruva_record.install_hook --api-key <your-key>

First queries to try

# In Claude Code:
> Use neruva to recall what we decided about auth last week

> Use neruva to save a decision: "switched to JWT refresh tokens"

> Use neruva to find every bug we've fixed in src/billing

What you actually get

More than “another vector DB.”

Typed records substrate

kind + tags + ts + meta + auto-embed. records_compact deterministically summarizes old runs into one row + tombstones the originals. Replayable from seed.

5 knowledge-graph engines

Hadamard / OPB / multishard / 3-shard quorum / feature_bundle — selectable per query. Scales from a handful of facts to hundreds of thousands per matrix. N-hop derive in a single matmul.

Pearl do-operator

Causal queries on agent memory. “What if X had happened” returns a different answer than “X happened” — arithmetically distinct, not a paraphrase.

HD analogy parallelogram

Cross-domain analogy retrieval. Find the auth bug in repo B that's the same shape as the one you fixed in repo A six months ago.

CBR episode store

Factored episode storage with top-K majority-vote retrieval. Sub-ms recall over thousands of cases.

Deterministic replay

Bit-identical reruns from the same seed. Auditable, exportable as one .neruva file. The compliance story no other agent-memory vendor ships.

Why Neruva for Claude Code

CLAUDE.md doesn't scale. We do.

vs CLAUDE.md / NERUVA.md files

Markdown files don't search. They go stale. They don't carry decision context between repos. Neruva is queryable, time-stamped, semantic, and cross-project.

vs context-stuffing your transcripts

Pasting yesterday's chat into today's prompt is $0.00625/turn at Opus 4.7 list. Neruva recall is ~3,000× cheaper and sub-100ms.

vs Anthropic Memory tool

Key-value persistence inside one vendor's SDK. Neruva is vendor-neutral substrate with 5 KG engines, causal, analogy, CBR — works across Claude / GPT / open-weights.

vs roll-your-own with Pinecone

You'd build records-with-types, KG with 5 engines, causal do-operator, HD analogy, episode store, secrets redaction, injection guard, portable export. Or install Neruva.

Your next Claude Code session
starts with everything you've done before.

Free tier: 10k records, 1k recalls/mo, no card. Indie $20/mo unlocks 1M records + all KG engines + unlimited recalls.

Get a free API key See pricing