Architect
Sep 5, 2026 · Artificial Intelligence
Codex's Context Management Redesign: Four-State Architecture for Long-Running Agents
The article analyzes Codex CLI's experimental context management system (v0.153.0), which replaces monolithic compaction with four distinct state types—current working set, handoff notes, searchable history, and external facts—detailing the model-driven window-switching protocol, token budget exposure, harness fallback mechanisms, and recovery considerations for long-running coding agents.
AI AgentsCodex CLIContext Management
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