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Warn when the CLI runs on an unsupported Node.js version - #89
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engines.node is >=22.12, but the CLI still runs on Node.js 20 (checked: --version and demo exit 0 on 20.19.0), and npm's EBADENGINE warning is easy to miss under npx. When the CLI is run directly on an older release, print one stderr line with the supported floor and the nodejs.org download link, then carry on. Library imports and stdout (including --json) are unchanged. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GDyUamKnmW15VzoFLkwnX5
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Before: running the CLI on Node.js older than 22.12 (for example 20.19) worked with no hint that the version is no longer supported.
After: on Node.js older than 22.12 the CLI prints one warning to stderr and then runs as usual:
It is a warning, not a hard stop, because the CLI still works on Node 20.
How:
src/system/node-support.tsholds the 22.12 minimum and builds the message;src/index.tswrites it only when the CLI is invoked directly, so library imports and tests stay quiet. Unit tests cover versions below, at and above the floor. CHANGELOG entry added under Changed.Replaces #88.
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https://claude.ai/code/session_01GDyUamKnmW15VzoFLkwnX5
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