mcp model-context-protocol openai-codex pi-agent tool-schema agent-architecture extensibility agent-security

agent-state session-management context-compaction openai-codex pi-agent claude-code agent-architecture cache-coherence

system-prompt token-budget pi-agent openai-codex prompt-engineering cost-curve agent-architecture ai-cost

agent-security sandboxing seatbelt landlock openai-codex pi-agent prompt-injection trust-boundary coding-agents

agent-harness claude-code openai-codex pi-agent agent-architecture source-analysis ai-engineering coding-agents