Module redaction 

Structs

ContextManager

Manages context window by summarizing/compacting when approaching limits. §3.7: “The Context Manager enforces the model’s window via summarization/compaction and a repo-map instead of dumping files.”

RedactionFilter

Filters secrets from events, transcripts, logs, and model context. §5: “Secrets never enter transcripts, logs, or model context unless explicitly a tool argument.”