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Anthropic Compact API (compact-2026-01-12): Production-Ready Automatic Context Compaction Across Claude API, AWS Bedrock, Vertex AI, and Microsoft Foundry with ZDR Support
Anthropic's compaction API endpoint (compact-2026-01-12) provides automatic context compression that works natively across Claude API, AWS Bedrock, Google Vertex AI, and Microsoft Foundry with Zero Data Retention support. Unlike third-party compression, this is provider-native — no intermediate proxy, no data leaving the provider boundary. Enables long-running agent sessions without manual context management. Combined with ACON's failure-driven guideline optimization for the compression step, developers can build agents that maintain coherent multi-hour sessions without context degradation.
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