reference-implementation
smol-kimi-k3 Tool
A runnable 49-million-parameter from-scratch trainer that deliberately keeps Kimi K3's unusual architectural ingredients rather than collapsing into a vanilla transformer, including the 3-to-1 KDA and gated MLA rhythm, ShortConv-based KDA, attention residuals, stable latent mixture of experts, and no positional encoding. Ships the recipe, a 10k-step checkpoint and verification checks, and is explicit that it is an architecture study rather than a capability claim.
Anthropic Commerce Agents Tool
A runnable shopping agent and merchant agent from Anthropic, built on a single model in one agent loop with no intent router and no sub-agents. Ships four vertical examples (retail, travel, telecom, entertainment) and runs through the Messages API, the Agent SDK or Managed Agents. Checkout handoff and staged merchant writes are enforced in code rather than in the prompt.