[m1s1q1]

The evaluator pins X6 3.1.7 while the skill and reference examples use container ID strings, causing TypeError: t.cloneNode is not a function at initialization. X6 3.1.8 supports DOM IDs (antvis/X6#5087), so upgrading the evaluator allows the existing examples to initialize.

This change pins the evaluator and introductory CDN example to X6 3.1.8 and documents both valid container forms: an existing DOM ID or an HTMLElement. It limits the variable-redeclaration warning to hosts that already provide the same binding. It also fixes the CDN filename, supplies a sized container in the HTML example, corrects the 80 0 typo, and synchronizes the skill catalog descriptions. All 136 reference records are retained byte-for-byte from upstream.

Validation:

• npm test: all 14 tests passed.
• npm run build: retrieval indexes rebuilt and TypeScript compilation passed.
• Real browser comparison with pinned X6 3.1.7 and 3.1.8: the ID-string example fails on 3.1.7 and renders two nodes and one edge on 3.1.8; HTMLElement containers work in both versions.
• Revised overview, graph-init and CDN examples initialize successfully on 3.1.8. Invalid IDs/CSS selectors are rejected; an unsized container still has zero height.
• X6 3.1.8 dist/x6.js returns HTTP 404; dist/x6.min.js returns HTTP 200.
• Original reference initialization checks: 130 of 136 initialize on 3.1.8. Six fail before Graph initialization on the pre-existing Graph.registerHTMLComponent error in both versions. This check covers initialization, not full rendering of every reference.
• git diff --check: passed.

Generated with AI assistance.

[lxfu1]

Update X6 to version 3.1.8. antvis/X6#5087