| FMRS | 64 / 100 · C | 79 / 100 · B |
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| Reliability | 12 / 20 | 12 / 20 |
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| Security and permissions | 9 / 20 | 16 / 20 |
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| Maintenance | 14 / 20 | 18 / 20 |
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| Documentation | 16 / 20 | 18 / 20 |
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| Setup experience | 13 / 20 | 15 / 20 |
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| Best for | - Long, multi-turn coding agent sessions
- Developers using several CLI clients at once
- Teams that need local-only operation, no telemetry, and a commercially usable license
- Teams that want to verify compression claims with a reproducible benchmark rather than vendor assertions
| - Developers auditing NPM dependencies within AI workflows
- Teams performing supply chain security assessments
- Users of Claude Desktop, Cursor, or VS Code
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| Not for | - Anyone who wants a bare MCP server without installing client hooks or plugins (the README states adding the server alone does not enforce anything)
- Scenarios where no request content may ever be written to local disk (the proxy writes elided payloads to spill files in the OS temp directory)
- Users who need a hosted service or cloud account
- Environments that cannot run Node.js 22+
| - Projects outside the NPM ecosystem (e.g., pure Python/Go)
- Environments without network access to deps.dev, OSV.dev, and the npm registry
- Scenarios requiring maintenance by an official upstream vendor
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| Required permissions | - Read and write project files for smart reads, diffs and edits
- Install and run client lifecycle hooks that intercept or re-route tool calls before execution
- Write cache, knowledge graph, logs and elided-content spill files to local disk
- Optionally start a compression proxy process bound to the local loopback address
- Read native CLI usage receipts for token accounting and pricing
| - Network access to the NPM registry and external services (deps.dev, OSV.dev, OpenSSF, npms.io, GitHub)
- Read access to workspace lockfiles (pnpm-lock.yaml, package-lock., yarn.lock) for cache invalidation
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| Risks and side effects | - The server refuses or rewrites built-in tool calls (Read, Grep, Glob, Edit, Write, and shell cat/head/grep -r), which in enforce mode can interrupt existing workflows
- Recoverable elided content is written with 0600 permissions under token-optimizer-spill/ in the OS temp directory and is not deleted while the proxy runs; a kill signal or power loss leaves the directory behind to be cleaned up by hand
- The proxy does not inspect written content for secrets, so a secret in your conversation can reach a spill file like any other text
- The local knowledge graph and cache hold project structure, content hashes and derived findings
- Several comparisons in the README are development-stage or incomplete studies; the project itself states that superiority was not established and that aggregate intervals still span 1.0
| - Third-party READMEs and changelogs are untrusted external content; they are wrapped in tags with _meta flags but should still be handled cautiously
- Depends on availability and accuracy of external services
- Batch requests are capped at 25 packages to prevent registry enumeration; larger sets require batching
- Third-party open source project, not officially maintained by NPM or Anthropic
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| Supported clients | Claude Code, Codex, GitHub Copilot CLI, Gemini CLI, Qwen Code, Cursor, Cline, OpenCode, Kilo, Windsurf, Roo Code, Zed, Amp, Continue, Crush, Droid | Claude Desktop, VS Code, Cursor |
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| Tools | 11 | 19 |
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