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# The Comprehensive List of Context Engineering Tools
> a curated, source-linked directory of open-source and commercial software for assembling, managing, compressing, and evaluating the context supplied to LLMs and AI agents. Includes a machine-readable catalog. CC0 licensed. Reviewed monthly; last reviewed 2026-07-16.
Every entry links to a primary source. Availability markers distinguish open source, open weights, open core, commercial products, and public standards/resources. There is no paid placement. This independent directory is maintained by aglio-lab, and every entry follows the same evidence rules.
## Main content
- [Full list](https://raw.githubusercontent.com/aglio-lab/context-engineering-tools/main/README.md): 162 source-linked entries across 15 catalog sections
- [JSON catalog](https://raw.githubusercontent.com/aglio-lab/context-engineering-tools/main/data/tools.json): structured entity records
- [CSV catalog](https://raw.githubusercontent.com/aglio-lab/context-engineering-tools/main/data/tools.csv): flat machine-readable index
- [Monthly maintenance policy](https://raw.githubusercontent.com/aglio-lab/context-engineering-tools/main/MAINTENANCE.md): review schedule and evidence rules
## Key categories
- Prompt Management and Versioning (10 entries)
- Context Assembly and Application Frameworks (14 entries)
- Context Compression and Summarization (9 entries)
- Long-Context Routing and Processing (8 entries)
- Agent Memory and State (12 entries)
- RAG and Retrieval Context (13 entries)
- Document Parsing, Chunking, and Ingestion (11 entries)
- Tool Context and Model Context Protocol (20 entries)
- Token Counting and Context Budgeting (7 entries)
- Prompt and Context Caching (8 entries)
- Structured Output and Schemas (10 entries)
- Context Observability and Debugging (12 entries)
- Context Quality Evaluation (10 entries)
- Context Security and Privacy (13 entries)
## Citation
- [CITATION.cff](https://raw.githubusercontent.com/aglio-lab/context-engineering-tools/main/CITATION.cff)
- Cite as: “The Comprehensive List of Context Engineering Tools” (2026). GitHub. https://github.com/aglio-lab/context-engineering-tools
- Cite an individual tool using its own repository, documentation, or paper.