Comment by docjay

``` §CONV_DIGEST§ T1:usr_query@llm-ctx-compression→math-analog(sparse-matrix|zip)?token-seq→nonsense-input→semantic-equiv-output? T2:rsp@asymmetry_problem:compress≠decompress|llm=predict¬decode→no-bijective-map|soft-prompts∈embedding-space¬token-space+require-training|gisting(ICAE)=aux-model-compress→memory-tokens|token-compress-fails:nonlinear-distributed-mapping+syntax-semantic-entanglement|works≈lossy-semantic-distill@task-specific+finetune=collapse-instruction→weights §T3:usr→design-full-python-impl§ T4:arch_blueprint→ DIR:src/context_compressor/{core/(base|result|pipeline)|compressors/(extractive|abstractive|semantic|entity_graph|soft_prompt|gisting|hybrid)|embeddings/(providers|clustering)|evaluation/(metrics|task_performance|benchmark)|models/(base|openai|anthropic|local)|utils/(tokenization|text_processing|config)} CLASSES:CompressionMethod=Enum(EXTRACTIVE|ABSTRACTIVE|SEMANTIC_CLUSTERING|ENTITY_GRAPH|SOFT_PROMPT|GISTING|HYBRID)|CompressionResult@(original_text+compressed_text+original_tokens+compressed_tokens+method+compression_ratio+metadata+soft_vectors?)|TokenCounter=Protocol(count|truncate_to_limit)|EmbeddingProvider=Protocol(embed|embed_single)|LLMBackend=Protocol(generate|get_token_limit)|ContextCompressor=ABC(token_counter+target_ratio=0.25+min_tokens=50+max_tokens?→compress:abstract)|TrainableCompressor(ContextCompressor)+(train+save+load) COMPRESSORS:extractive→(TextRank|MMR|LeadSentence)|abstractive→(LLMSummary|ChainOfDensity|HierarchicalSummary)|semantic→(ClusterCentroid|SemanticChunk|DiversityMaximizer)|entity→(EntityRelation|FactList)|soft→(SoftPrompt|PromptTuning)|gist→(GistToken|Autoencoder)|hybrid→(Cascade|Ensemble|Adaptive) EVAL:EvaluationResult@(compression_ratio+token_reduction+embedding_similarity+entailment_score+entity_recall+fact_recall+keyword_overlap+qa_accuracy?+reconstruction_bleu?)→composite_score(weights)|CompressionEvaluator(embedding_provider+llm?+nli?)→evaluate|compare_methods PIPELINE:CompressionPipeline(steps:list[Compressor])→sequential-apply|AdaptiveRouter(compressors:dict+classifier?)→content-based-routing DEPS:numpy|torch|transformers|sentence-transformers|tiktoken|networkx|sklearn|spacy|openai|anthropic|pandas|pydantic+optional(accelerate|peft|datasets|sacrebleu|rouge-score) ```