{
  "cards": 153,
  "topic_sets": 16,
  "tutorial_episodes": 17,
  "orientation_episode": 1,
  "code_examples_executed": 12,
  "coverage_limit": "Conceptual companion to all 17 retrieved transcript episodes. Episode 1 is orientation. Original operating extensions are labeled. Not a claim of complete on-screen code reproduction, exhaustive RAG mastery or validated current library integrations.",
  "corrections": [
    "Indexing external sources does not itself retrain model weights. Selected evidence enters the current request context; the complete source collection need not fit there.",
    "Grounding instructions are not a guarantee. Supply image evidence through a supported image input; encoding its bytes as text does not make a text-only model see the image.",
    "MMR is a measured relevance/diversity tradeoff, not an unconditional improvement or prohibition for any query category.",
    "A token is not generally one word. Context budgets and tokenization depend on the model and request.",
    "Embedding coordinates do not have guaranteed named meanings; dimensionality alone does not establish compatibility or quality.",
    "Retrieval, permission filtering, versioning and answer support need separate checks. Similarity is not a truth score.",
    "Signed cosine lies between minus one and one and is undefined for a zero vector. Examples handle or reject that case explicitly.",
    "The semantic-chunking percentile example uses a stated interpolation rule. Distance-above and similarity-below rules have opposite threshold directions.",
    "Retrieval fusion does not enforce a context budget. RRF uses ranks, deduplicates stable document IDs and requires explicit tie handling.",
    "RRF ranks one and three with constant sixty yield 0.03227 rounded to five decimal places; intermediate rounding caused the draft error.",
    "Lexical search can include normalization and synonyms. BM25 includes frequency saturation and document-length normalization.",
    "Cross-encoders are one reranking approach, not the only one. A reranker cannot recover candidates never retrieved.",
    "Tutorial API parameters and vendor choices are examples, not universal production defaults. Check the installed version and evaluate on representative questions."
  ],
  "editorial_decisions": {
    "patches": [
      {
        "episode": 2,
        "id": "context-window-bounded",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "token-not-word",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "why-rag-not-dump",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "chunking-purpose",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "embedding-dimensions",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "semantic-similarity-embeddings",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "embedding-dimensions-tradeoff",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "embedding-model-consistency",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "retrieval-pipeline-steps",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 2,
        "id": "retrieval-uses-original-text",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 4,
        "id": "retriever-top-k",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 4,
        "id": "retrieval-no-llm",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 4,
        "id": "retrieval-quality-check",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 4,
        "id": "retrieval-evaluation",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 4,
        "id": "retrieval-freshness",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 4,
        "id": "retrieval-support",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 6,
        "id": "combine-query-chunks",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 6,
        "id": "system-message-role",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 7,
        "id": "why-follow-ups-fail",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 7,
        "id": "chat-history-storage",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 8,
        "id": "chunking-pipeline-position",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 8,
        "id": "recursive-character-splitting",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 8,
        "id": "chunking-strategy-selection",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 9,
        "id": "char-splitter-split-merge",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 10,
        "id": "percentile-definition",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 10,
        "id": "percentile-calculation",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 10,
        "id": "percentile-threshold-semantic",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 10,
        "id": "percentile-choice-tradeoff",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 10,
        "id": "why-percentile-not-fixed",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 11,
        "id": "agentic-chunking-advantages",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 11,
        "id": "agentic-chunking-drawbacks",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 11,
        "id": "etl-unstructured-data",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 12,
        "id": "mixed-chunk",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 12,
        "id": "why-summarize-mixed-chunks",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 12,
        "id": "partitioning-parameters",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 12,
        "id": "base64-image-transfer",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 12,
        "id": "system-dependencies-unstructured",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 13,
        "id": "retrieval-methods-overview",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 13,
        "id": "similarity-search-no-threshold",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 13,
        "id": "mmr-two-step-process",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 16,
        "id": "hybrid-why",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 16,
        "id": "bm25-tf-idf",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 16,
        "id": "keyword-limitation",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 16,
        "id": "hybrid-scale",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 17,
        "id": "reranking-definition",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 17,
        "id": "embedding-limitation",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 17,
        "id": "reranker-vs-embedding",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 17,
        "id": "reranker-vs-llm",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 17,
        "id": "reranker-before-after",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      },
      {
        "episode": 17,
        "id": "reranker-model-choice",
        "reason": "Independent correction of factual scope, original example or spoken explanation"
      }
    ],
    "removed": [
      {
        "episode": 2,
        "id": "rrf-formula",
        "reason": "Covered in the appropriate later topic set; remove repeated correction boilerplate."
      },
      {
        "episode": 2,
        "id": "reranking-limitation",
        "reason": "Covered in the appropriate later topic set; remove repeated correction boilerplate."
      },
      {
        "episode": 2,
        "id": "cross-encoder-reranker",
        "reason": "Covered in the appropriate later topic set; remove repeated correction boilerplate."
      },
      {
        "episode": 2,
        "id": "query-rewriting-caution",
        "reason": "Covered in the appropriate later topic set; remove repeated correction boilerplate."
      },
      {
        "episode": 2,
        "id": "multimodal-extraction-provenance",
        "reason": "Covered in the appropriate later topic set; remove repeated correction boilerplate."
      },
      {
        "episode": 2,
        "id": "semantic-chunking-tradeoff",
        "reason": "Covered in the appropriate later topic set; remove repeated correction boilerplate."
      },
      {
        "episode": 2,
        "id": "embedding-dimensions-compatibility",
        "reason": "Covered in the appropriate later topic set; remove repeated correction boilerplate."
      },
      {
        "episode": 3,
        "id": "implementation-later",
        "reason": "Prerequisite instruction belongs in the guide, not a memorization card."
      },
      {
        "episode": 6,
        "id": "conversation-next-step",
        "reason": "Course navigation belongs in the guide."
      },
      {
        "episode": 7,
        "id": "reformulated-query-example",
        "reason": "Same skill already covered by history-aware-extra-step or chat-history-storage."
      },
      {
        "episode": 7,
        "id": "append-to-history",
        "reason": "Same skill already covered by history-aware-extra-step or chat-history-storage."
      },
      {
        "episode": 8,
        "id": "semantic-splitting",
        "reason": "Distinct methods taught in their own later sets."
      },
      {
        "episode": 8,
        "id": "agentic-splitting",
        "reason": "Distinct methods taught in their own later sets."
      },
      {
        "episode": 10,
        "id": "semantic-chunking-three-steps",
        "reason": "Already covered by the retained procedure, threshold, adaptation and tradeoff cards."
      },
      {
        "episode": 10,
        "id": "semantic-chunking-adjacent-similarity",
        "reason": "Already covered by the retained procedure, threshold, adaptation and tradeoff cards."
      },
      {
        "episode": 10,
        "id": "semantic-chunking-breakpoint",
        "reason": "Already covered by the retained procedure, threshold, adaptation and tradeoff cards."
      },
      {
        "episode": 10,
        "id": "semantic-chunking-not-always-best",
        "reason": "Already covered by the retained procedure, threshold, adaptation and tradeoff cards."
      },
      {
        "episode": 12,
        "id": "implementation-later-prerequisites",
        "reason": "Prerequisites belong in the guide; earlier canonical cards cover these general mechanisms."
      },
      {
        "episode": 12,
        "id": "character-limit-not-token-limit",
        "reason": "Prerequisites belong in the guide; earlier canonical cards cover these general mechanisms."
      },
      {
        "episode": 12,
        "id": "vector-store-persistence-local",
        "reason": "Prerequisites belong in the guide; earlier canonical cards cover these general mechanisms."
      },
      {
        "episode": 12,
        "id": "synthetic-questions-retrieval-test",
        "reason": "Prerequisites belong in the guide; earlier canonical cards cover these general mechanisms."
      },
      {
        "episode": 13,
        "id": "score-threshold-tradeoff",
        "reason": "Covered by the score-threshold card in set 4."
      },
      {
        "episode": 14,
        "id": "rrf-definition",
        "reason": "RRF is taught with worked arithmetic in set 15; preserve a guide reference instead of duplicate cards."
      },
      {
        "episode": 14,
        "id": "rrf-deduplication",
        "reason": "RRF is taught with worked arithmetic in set 15; preserve a guide reference instead of duplicate cards."
      },
      {
        "episode": 14,
        "id": "rrf-missing-docs",
        "reason": "RRF is taught with worked arithmetic in set 15; preserve a guide reference instead of duplicate cards."
      },
      {
        "episode": 14,
        "id": "rrf-k-constant",
        "reason": "RRF is taught with worked arithmetic in set 15; preserve a guide reference instead of duplicate cards."
      },
      {
        "episode": 14,
        "id": "rrf-limitations",
        "reason": "RRF is taught with worked arithmetic in set 15; preserve a guide reference instead of duplicate cards."
      },
      {
        "episode": 15,
        "id": "rrf-definition",
        "reason": "Formula/consensus/limitations cards or the multi-query and reranking sets already cover this objective."
      },
      {
        "episode": 15,
        "id": "rrf-missing-items",
        "reason": "Formula/consensus/limitations cards or the multi-query and reranking sets already cover this objective."
      },
      {
        "episode": 15,
        "id": "rrf-query-variations",
        "reason": "Formula/consensus/limitations cards or the multi-query and reranking sets already cover this objective."
      },
      {
        "episode": 15,
        "id": "rrf-not-guarantee",
        "reason": "Formula/consensus/limitations cards or the multi-query and reranking sets already cover this objective."
      },
      {
        "episode": 15,
        "id": "rrf-reranking",
        "reason": "Formula/consensus/limitations cards or the multi-query and reranking sets already cover this objective."
      },
      {
        "episode": 15,
        "id": "rrf-cross-encoder",
        "reason": "Formula/consensus/limitations cards or the multi-query and reranking sets already cover this objective."
      },
      {
        "episode": 16,
        "id": "rrf-formula",
        "reason": "Use canonical RRF and reranking cards, preserving their original IDs."
      },
      {
        "episode": 16,
        "id": "reranking-purpose",
        "reason": "Use canonical RRF and reranking cards, preserving their original IDs."
      },
      {
        "episode": 16,
        "id": "cross-encoder",
        "reason": "Use canonical RRF and reranking cards, preserving their original IDs."
      },
      {
        "episode": 16,
        "id": "rrf-dedup",
        "reason": "Use canonical RRF and reranking cards, preserving their original IDs."
      },
      {
        "episode": 16,
        "id": "rrf-missing",
        "reason": "Use canonical RRF and reranking cards, preserving their original IDs."
      },
      {
        "episode": 16,
        "id": "reranker-limits",
        "reason": "Use canonical RRF and reranking cards, preserving their original IDs."
      },
      {
        "episode": 2,
        "id": "cosine-similarity-definition",
        "reason": "Cosine is taught fully in set 5; keep the foundational guide reference."
      },
      {
        "episode": 17,
        "id": "rrf-fusion",
        "reason": "Covered by RRF, hybrid weighting, prerequisites or measured reranker tradeoffs; remove repeated and unsupported rankings."
      },
      {
        "episode": 17,
        "id": "rrf-not-correctness",
        "reason": "Covered by RRF, hybrid weighting, prerequisites or measured reranker tradeoffs; remove repeated and unsupported rankings."
      },
      {
        "episode": 17,
        "id": "hybrid-search-weights",
        "reason": "Covered by RRF, hybrid weighting, prerequisites or measured reranker tradeoffs; remove repeated and unsupported rankings."
      },
      {
        "episode": 17,
        "id": "reranker-implementation-later",
        "reason": "Covered by RRF, hybrid weighting, prerequisites or measured reranker tradeoffs; remove repeated and unsupported rankings."
      },
      {
        "episode": 17,
        "id": "reranker-vs-llm-cost",
        "reason": "Covered by RRF, hybrid weighting, prerequisites or measured reranker tradeoffs; remove repeated and unsupported rankings."
      },
      {
        "episode": 17,
        "id": "reranker-accuracy-motivation",
        "reason": "Covered by RRF, hybrid weighting, prerequisites or measured reranker tradeoffs; remove repeated and unsupported rankings."
      },
      {
        "episode": 17,
        "id": "reranker-small-corpus",
        "reason": "Covered by RRF, hybrid weighting, prerequisites or measured reranker tradeoffs; remove repeated and unsupported rankings."
      },
      {
        "episode": 10,
        "id": "semantic-chunking-percentile-adaptation",
        "reason": "The retained adaptive-threshold card already teaches this mechanism."
      }
    ],
    "limits": "Original conceptual study sets derived from auto captions, with primary-source corrections. On-screen source code has not been independently transcribed; illustrative code is original and separately checked. Source mapping is not a guarantee of exhaustive coverage."
  }
}