Developer builds DeepSeek Harness plugin in a week at zero API cost using free promotion

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A developer who set out to review DeepSeek Harness (DSH), an open-source AI tool framework, ended up authoring and shipping a plugin called dsh-model-pricing within a week. The plugin surfaces per-token pricing for 7,178 models across 213 providers, overlays that data against the 788 models the harness can directly invoke, and flags discrepancies rather than averaging them. It also enables same-model, cross-provider cost comparisons and groups subscription plans separately to avoid skewing per-token rankings. The entire project was built using DeepSeek via B.AI's free API promotion, resulting in zero LLM costs across roughly 22 hours of development. The plugin is publicly available under the Apache-2.0 license and installs directly through the harness's own plugin manager without requiring a repository fork.

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