Sync harbor-cli skill with upstream changes (2026-05-07)

[benediktstroebl]

Updates skills/harbor-cli/SKILL.md based on upstream commits from the past 48 hours.

What changed upstream

• 8d40b8a — DaytonaEnvironment now accepts a connection_pool_maxsize env kwarg forwarded to DaytonaConfig (--ek connection_pool_maxsize=N, or =null for unlimited)
• 352389a — OpenCode run() now supports any model provider via provider/model_id format, including openrouter
• 6a8bb1b — Cursor CLI now enforces CURSOR_API_KEY and requires model in provider/model-id format (provider prefix stripped before passing to cursor-agent)
• 5906c4c / 25b0c3d — Tensorlake confirmed as a supported environment backend (tensorlake.py already existed; now officially listed in docs)

Skill updates (harbor-cli/SKILL.md)

• Environment Backends table: added tensorlake row
• After environments table: added note documenting --ek connection_pool_maxsize=N for Daytona
• Supported Agents table: updated cursor-cli (requires CURSOR_API_KEY, model format provider/model-id) and opencode (any provider supported)
• Common Gotchas: added cursor-cli to API keys note; added cursor-cli and opencode to model format note

Skills not affected

• harbor-adapter-creator — the Daytona/Tensorlake changes are environment-backend internals, not adapter-creation patterns
• harbor-task-creator — no relevant upstream changes

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