[CON-1534] Correct CLI guidance and add host support skill

[jjziets]

Summary

• add a focused vastai-host-support skill for paid self-test gating, dump-logs, redacted support bundles, bundle review, and cleanup auditing
• correct Vast CLI guidance for teams, network volumes, min-bid pricing, GPU trends, and self-test side effects
• update the host skills for vast-cli#458: configured-range capacity, four fixed mappings, TCP and UDP probes, --port-scan-timeout, and the paired self-test image
• replace independently maintained skill content with a generated snapshot of vast-ai/skills#1
• pin the canonical commit and every generated file digest in skills.lock.json; reject drift in validation
• add a scheduled/manual workflow that opens wrapper update PRs when canonical main advances
• keep Cursor-specific rules and manifests local, while making the installer copy complete canonical skill directories
• validate the wrapper and installer on Ubuntu, macOS, and Windows

Shared-source architecture

This repository remains the Cursor harness: its manifest, rules, and installation logic stay local. The three directories under skills/ are generated packaging snapshots, not independent sources.

The snapshot is pinned to canonical commit 44ec627a44453e9f4860ed7075123f538d84c6cb. Skill changes should be made in vast-ai/skills; the wrapper sync workflow then advances the pin through a normal PR.

Merge dependency: merge vast-ai/skills#1 before this PR so the pinned revision and reusable sync workflow exist on canonical main.

Sibling wrappers:

• vast-claude-plugin#2
• vast-codex-plugin#2

Validation

• python3 scripts/validate_plugin.py
• canonical materializer --check
• bash tests/install-smoke.sh
• shellcheck install.sh tests/install-smoke.sh
• actionlint
• git diff --check
• generated snapshots are byte-identical across Claude, Codex, and Cursor
• no paid or mutating Vast API calls were made

Final branch CI passed the wrapper validator and installer on ubuntu-latest, macos-latest, and windows-latest.

Tracking: CON-1534

[jjziets]

Cross-platform validation is green for exact head 191993c: fork Actions run 29733527413 passed manifest/skill validation and the isolated installer smoke test on Ubuntu, macOS, and Windows.

Synchronized PRs: Claude #2 and Codex #2.