Building AI Coding Agents for the Terminal: Scaffolding, Harness, Context Engineering, and Lessons Learned

Researchers have developed OPENDEV, an open-source command-line AI coding agent that operates directly in terminal environments where developers manage source control and deployments. The system uses a compound AI architecture with dual-agent design, specialized model routing, and adaptive context management to provide autonomous coding assistance while maintaining safety controls.

• →AI coding assistance is shifting from IDE plugins to terminal-native agents that offer greater autonomy for long-horizon development tasks.
• →OPENDEV employs a dual-agent architecture separating planning from execution with workload-specialized model routing.
• →The system uses adaptive context compaction and lazy tool discovery to prevent context bloat and reasoning degradation.
• →An automated memory system accumulates project-specific knowledge across sessions while event-driven reminders counteract instruction fade-out.
• →The open-source framework provides a blueprint for secure, extensible terminal-first AI assistance in software engineering.