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lean-ctx v3.9.13 Is a 20-Bug Field Guide to What Breaks in Production MCP Servers
The context-layer MCP server lean-ctx (3,480 stars, 76 MCP tools) shipped a release that is almost entirely correctness fixes, and the list doubles as a checklist for anyone shipping an MCP server. Highlights: call_tool now checks the rmcp CancellationToken after execution so a cancelled request does not reply to a stale JSON-RPC message ID; secret redaction no longer corrupts `[redacted] ""` in Go source into `[redacted]; ctx_patch finally honors dry_run=true for replace_unique; and ctx_search enforces max_results globally instead of per-file, which previously produced unbounded output that could crash clients.
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