lean-ctx (yvgude/lean-ctx) is an MCP server listed on the M8ven Trust Index. It scores 98 out of 100, grade A. It declares 7 tools. No publisher has claimed this listing.

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A
Trusted
98/100
20 days ago

lean-ctx

Control what your AI can see. LeanCTX (Lean Context) is the context intelligence layer for AI agents — one local Rust binary that decides what they read, remembers what they learn, guards what they touch, and proves what they save. 60–90% fewer tokens as the receipt. 76 MCP tools, 30+ agents, local-first.

→ yvgude/lean-ctx· listed on github_topic

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Who stands behind it

yvgude

Source: github_topic

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// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configLEAN_CTX_BINtoolProfile → LEAN_CTX_PI_TOOL_PROFILE, binary → ,
configLEAN_CTX_COMPRESSThese tools invoke the lean-ctx binary via CLI with =1.
configLEAN_CTX_PI_DISABLE_TOOLSdisableTools → ,
configLEAN_CTX_PI_MODEOptional: replace mode (=replace) disables Pi builtins
configLEAN_CTX_PI_TOOL_PREFIXtoolPrefix → (see
configLEAN_CTX_PI_TOOL_PROFILEexport =power # or "standard" for the balanced 15-tool set
configLEAN_CTX_SAVINGS_FOOTER
configPI_CODING_AGENT_DIR
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

7/7 tools missing one or more hints — ctx_shell (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); ctx_read (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); ctx_ls (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +4 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

License file

No license file

Add a LICENSE file (MIT, Apache-2.0, etc.).

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// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/yvgude/lean-ctx)](https://m8ven.ai/mcp/yvgude/lean-ctx)
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commit: da0ed5540d7b0bca9df3e4c53179c184e938efec
code hash: 805d10894116e8de47d640a0e6b5868f422dca99fbd5dcfde8ac24a864bd6e04
verified: 8/22/2026, 3:01:16 AM
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