OpenCrab

LocalCrab builds. OpenCrab SaaS distributes.

OpenCrab is the public integration repository for the LocalCrab ontology factory and the OpenCrab hosted ecosystem at opencrab.sh.

This repository contains the local engine: MetaOntology OS grammar, MCP tools, CrabHarness evidence collection, local stores, promotion lifecycle, and pack export contracts. It does not contain the private implementation of the hosted opencrab.sh SaaS product.

Any sample app or API code in this repository is local/demo infrastructure for developer testing. It is not the production opencrab.sh SaaS code.

What This Repo Is For

The intended flow:

source material or crawl target
        |
        v
CrabHarness mission planning
        |
        v
evidence collection + OCR/CLIP indexing
        |
        v
MetaOntology grammar extraction
        |
        v
Neo4j/Cypher validation
        |
        v
OpenCrab Pack v1 ZIP
        |
        v
opencrab.sh ingest + marketplace + ecosystem distribution

LocalCrab and OpenCrab SaaS

LocalCrab is quality-first. It exists to produce ontology packs with strong evidence coverage, traceable parsing, OCR/CLIP context, graph validation, and promotion receipts.

OpenCrab SaaS is ecosystem-first. It exists to ingest packs, make them useful to users and agents, distribute them through marketplace/community surfaces, and expose hosted MCP access.

Read the full relationship model:

• LocalCrab and OpenCrab SaaS relationship

• LocalCrab factory workflow

• OpenCrab Pack v1 ZIP format

Quick Start

1. Install LocalCrab

pip install -e ".[dev]"

2. Run LocalCrab

opencrab serve

LocalCrab runs locally by default. It uses SQLite, JSON files, and a local Chroma persistent store under ./opencrab_data.

3. Verify the grammar and query path

opencrab status
opencrab manifest
opencrab query "system performance and error rates"

4. Add LocalCrab as an MCP server

claude mcp add opencrab -- opencrab serve

Or add it manually:

{
  "mcpServers": {
    "opencrab": {
      "command": "opencrab",
      "args": ["serve"]
    }
  }
}

CrabHarness

crabharness/ is the mission-first control plane for evidence collection. It plans what to crawl, delegates heavy work to plugin workers, validates the collected bundle, and emits OpenCrab-ready promotion packages.

Core responsibilities:

• Decide crawl target, scope, depth, volume, rate limits, and success criteria.

• Store every collected page, document, file, image, and log as evidence.

• Preserve hashes, source URLs or paths, crawl timestamps, parser status, and missing-context candidates.

• Promote only after completeness, semantic relevance, and autoresearch gates pass.

See the CrabHarness README.

MetaOntology OS

LocalCrab keeps the existing MetaOntology OS grammar and MCP surface as the canonical ontology contract.

9 Spaces

Core MCP Tools

• ontology_manifest: return the full grammar.

• ontology_add_node: add or update a grammar-validated node.

• ontology_add_edge: add a grammar-validated edge.

• ontology_query: hybrid vector + BM25 + graph query.

• ontology_impact: I1-I7 impact analysis.

• ontology_rebac_check: relationship-based access check.

• ontology_ingest: ingest text into the local ontology stores.

• harness_promotion_apply: apply a CrabHarness promotion package.

OpenCrab Pack v1

LocalCrab exports ontology deliveries as an OpenCrab Pack v1 ZIP. The pack is designed to be recognized by OpenCrab SaaS while remaining reproducible in a local Neo4j environment.

Required high-level layout:

manifest.json
graph/nodes.jsonl
graph/edges.jsonl
evidence/index.jsonl
quality/report.json
neo4j/import.cypher
neo4j/opencrab_ingest.jsonl
neo4j/export_status.json
README.md
sample_queries.json
community_reports.json

The packaging pipeline is:

validate -> Neo4j import/check -> Neo4j graph export -> normalized SaaS export -> ZIP package

See OpenCrab Pack v1 ZIP format.

Development

make dev-install
make seed
make test
make status

Run integration tests:

OPENCRAB_INTEGRATION=1 pytest tests/ -v

Project Structure

opencrab/
  grammar/        MetaOntology grammar, validator, glossary
  schemas/        YAML type schemas, schema packs, action schemas
  ontology/       builder, query, identity, canonicalization, promotion, ReBAC
  execution/      workflow and approval runtime
  billing/        local usage hooks
  stores/         Neo4j, Chroma, Mongo, SQL, and local adapters
  mcp/            MCP server and tool registry
crabharness/
  crabharness/    mission planner, runtime, validation, promotion package builder
  codex_workers/  plugin workers for crawlers and collectors
  missions/       example missions
docs/             public integration and pack delivery contracts

Korean Summary

이 리포지토리는 LocalCrab과 OpenCrab SaaS를 하나의 제품처럼 설명하는 공개 통합 리포지토리입니다. LocalCrab은 온톨로지 공장입니다. 크롤링, 파싱, OCR, CLIP 이미지 컨텍스트, evidence 풀 인덱싱, Neo4j 검증, ZIP 팩 생성을 담당합니다.

OpenCrab SaaS는 opencrab.sh의 생태계 허브입니다. 완성된 팩을 인제스트하고, 마켓플레이스와 커뮤니티에서 배포하며, hosted MCP 접근을 제공합니다. 단, opencrab.sh의 내부 SaaS 코드는 이 공개 리포지토리에 포함하지 않습니다.

License

MIT.