Changelog

What has shipped

Updates to the live site. Each line is a change that already shipped.

1. 2026-10-18

   Tool design, context, ranking, and evals

   Tool design/MCP, Context engineering, Hybrid search, Reranking, and Evaluation basics are live cards. Hybrid search and Reranking stay separate, matching the registry. Tool design includes the Model Context Protocol. Prompt injection cites OpenAI's computer use guide instead of the Agent Builder safety page. Temperature notes top-p. Agent loop says AI agent. RAG says retrieval-augmented generation. No rate or usage count was added.

   Tool design/MCP, Context engineering, Hybrid search, Reranking, Evaluation basics

2. 2026-10-18

   Homepage shows concepts working

   The home page opens on what the site is, four browser demos, the tracks, and the pricing tiers. The token split in the demo is an illustration, not a model tokenizer. Example prices are labelled and match the Foundations pack. No model is called.

3. 2026-10-18

   Agents track starter cards

   Agent loop, Tool calling, and Prompt injection are live cards. They cite OpenAI, Anthropic, and Gemini docs. Prompt injection also cites the OWASP Top 10 for LLM Applications. No rate or usage count was added.

   Agent loop, Tool calling, Prompt injection

4. 2026-10-17

   Retrieval & Grounding starter cards

   RAG, Chunking, and Embeddings for retrieval are live cards. Foundations Embeddings stays without a card. The retrieval card links to that entry.

   RAG, Chunking, Embeddings for retrieval

5. 2026-10-17

   Temperature and the Foundations pack

   Temperature is a live card. The Foundations pack page has a token-budget example and a pre-launch cost checklist. The example prices are labelled and cited. The traffic numbers on that page are labelled assumptions.

   Temperature

6. 2026-10-17

   Four Foundations cards

   Prompt Caching, Model Selection & Routing, Structured Outputs, and Hallucination are live cards. Those four cite vendor API docs. The earlier cards still have no sources.

   Prompt Caching, Model Selection & Routing, Structured Outputs, Hallucination

7. 2026-10-16

   Tokens and Context Window cost notes

   Cost on Tokens covers output versus input, cached input, and a higher rate past a size threshold. Cost on Context Window notes that resending the same history or documents adds up, and that prompt caching can make the repeated part cheaper.

   Tokens, Context Window

8. 2026-10-16

   Card template v2

   Live cards use the v2 layout. Prerequisites and related concepts come from the registry.

   Tokens, Context Window, Prompting

9. 2026-10-16

   Concepts site at the root

   The concepts product is the site root.