v0.1.81

Added

• Dynamic OpenRouter free model discovery -- fetches live free models from OpenRouter API at startup; replaces static list with fresh data so new free models appear automatically without code updates. Falls back to cached static list with a yellow warning on network failure.
• formatCtxWindow and labelFromId utility functions -- extracted to lib/utils.js for testability; used by dynamic OpenRouter discovery to convert API data to display format.
• 16 new unit tests -- covering formatCtxWindow, labelFromId, and MODELS array mutation logic (147 total tests across 23 suites).
• NVIDIA NIM auto-configuration -- selecting a NIM model in OpenCode now auto-creates the nvidia provider block in opencode.json if missing, eliminating the manual install prompt.

Fixed

• Auto-update infinite loop -- when running from source (dev mode with .git directory), auto-update is now skipped to prevent the restart loop where LOCAL_VERSION never changes.
• NVIDIA model double-prefix bug -- model IDs in sources.js already include nvidia/ prefix; getOpenCodeModelId() now strips it for nvidia provider (like it does for zai), preventing nvidia/nvidia/... in OpenCode config.

Removed

• checkNvidiaNimConfig() function -- replaced by auto-create pattern; dead code removed.

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