ArgosBrain gives any MCP-compatible coding agent persistent structural memory of your codebase. Sub-millisecond lookups. No LLM in the retrieval loop. Runs local.
sections/*.liquid on every turn.Every session starts from scratch. Every query re-embeds files you've already seen. Every run rebuilds the repo map and throws it away.
The community has a name for this: context rot. Chroma's 2025 study measured it across 18 frontier models — every one degrades as input grows. Anthropic shipped a Memory Tool in September 2025, but it's a file primitive, not a brain.
Meanwhile, you're paying for the same file to be read 40 times a week. Cursor Ultra is $200/mo. Claude Max is $200/mo. Token bills don't lie.
Compiled Rust binary runs locally. Tree-sitter + SCIP parse your codebase into a unified graph. 28 languages. Updates instantly on file save.
Any agent asks structural questions via standard MCP tools — symbol_exists, resolve_member, list_symbols, search. Sub-ms answers. Integrate it into your custom internal tools effortlessly.
$0 per query, forever. No LLM in the retrieval loop. Local-first. Zero data egress. Toggle on/off, see the diff.
Same repo. Same prompt. Same model (Claude Opus 4.7, temperature=0).
Left window: agent alone. Right window: agent + ArgosBrain.
"ArgosBrain cut our Claude API token burn by 60% and halved the 'thinking' wait times on our backend repo. It's the first local memory tool that actually understands implicit Go interfaces."
LLM summarization destroys ASTs. We parse them.
$52M raised in the category — zero products built for code.
100M tokens still hallucinate symbols. And cost real money per call.
Our answers are ground truth, in 0.8 milliseconds.
They ship your code to their servers and bill LLM cost per query.
We run local. $0 per query. Zero data egress.
Locked to one editor. We work in every MCP agent — including the ones above.
One brain, every tool.
One giant table is unreadable. Here's the same information split into seven categories — ArgosBrain first, everyone else ranked against us. Click any competitor for the full page with citations.
| ArgosBrain | $0 — no LLM on read path |
| Zep / Graphiti | Free retrieval (graph + semantic) |
| Mem0 | Embedding + vector search |
| MCP memory server | Substring + full body |
| Aider | ~1 000 tokens / request |
| Continue | Prompt tokens (chunks injected) |
| Cursor · Windsurf · Copilot | Prompt tokens every relevant query |
| CLAUDE.md | Full file in system prompt, every turn |
| Cline Memory Bank | Full MD bank at every session start |
| Letta | LLM tool-call on every read |
| ArgosBrain | SCIP + live LSP + tree-sitter, tiered per language |
| Aider | Tree-sitter surface names + PageRank |
| Continue | Tree-sitter text chunks for embedding |
| Copilot | Semantic repo indexing (opaque) |
| Cursor · Windsurf | Undocumented |
| Cline · Mem0 · Zep · Letta · CLAUDE.md · MCP memory | No code indexing — prose / text / JSON |
| ArgosBrain | File-hash invalidation, automatic |
| Copilot | 28-day auto-expire + citation validation |
| Aider | Recomputed per request (always fresh) |
| Zep / Graphiti | Bi-temporal edges (not code-aware) |
| Continue | On re-index |
| Cursor · Windsurf | Unknown |
| Cline · CLAUDE.md | Manual edit only |
| Mem0 · Letta · MCP memory | None |
| ArgosBrain | Yes, default — runs in-process |
| Windsurf · Zed · Cline · Aider · Continue · CLAUDE.md · MCP memory | Yes |
| Mem0 · Letta | OSS self-host yes; Cloud no |
| Zep | CE deprecated Apr 2025 — Graphiti OSS only |
| Cursor · Copilot | Cloud-only |
| ArgosBrain | LongMemCode 99.2–100% across 16 corpora, P99 ≤ 0.82 ms |
| Zep | DMR 94.8%, LongMemEval +18.5% / −90% latency |
| Mem0 | LoCoMo 91.6%, LongMemEval 93.4% |
| Letta | Terminal-Bench #1 OSS (Letta Code) |
| All others | None published |
| ArgosBrain | Is an MCP server — runs under every MCP client |
| MCP memory server | Yes (reference implementation) |
| Continue · Cline · Mem0 · Zep · Letta | MCP client only — can consume, not serve |
| CLAUDE.md | Convention, not a protocol |
| Cursor · Windsurf · Copilot · Aider | No — memory locked inside their tool |
"State integrity degrades at 500K to 2M tokens. Roughly one-fifth to one-tenth the scale where retrieval architecture becomes critical." — Mark Hendrickson · Apr 2026
Long-context models don't solve memory. BEAM scores showed RAG degrading from 30.7% at 1M tokens to 24.9% at 10M, and contradiction resolution near zero at every tier. ArgosBrain's verify / dispute / zone transitions are exactly the write-integrity layer those numbers say is missing.
"Every practitioner has felt it. Your GraphRAG system is useless for weeks — hallucinating, missing obvious connections. Then suddenly, it works." — Alexander Shereshevsky · Graph Praxis
Flat vector RAG breaks on codebases because codebases are high-connectivity graphs (call sites, inheritance, imports). ArgosBrain is graph-first by design — petgraph + HNSW + keyword hybrid — which is why every cell in the "code-native" row above is red except ours.
"We win at everything" is a lie and engineers smell it instantly. Here's what we don't ship today.
Cursor and Copilot ship memory inside the editor with zero install. ArgosBrain runs as an MCP server you configure.
Mem0 Cloud and Zep Cloud offer multi-user team memory out of the box. ArgosBrain is local-first; team sync is roadmap, not shipped.
Mem0 holds 91.6% on LoCoMo. ArgosBrain targets ≥91.6% on LongMemEval — match, not beat. Our moat is code, not chat.
LongMemCode is an open-source benchmark we authored and published under MIT license. Every system below runs the same 150-question hard subset. Results are public, reproducible, and neutral-hosted at longmemcode.com.
argosbrain audit in your terminal to inspect the exact JSON payload before it's sent.