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GitHub Agentic Workflows v0.68.6: OpenCode Joins Copilot, Claude, and Codex as Fourth First-Class Engine
Five releases (v0.68.3–v0.68.7) shipped April 14–17, headlined by OpenCode becoming the fourth first-class agentic engine option alongside Copilot, Claude, and Codex. New engine.bare mode skips AGENTS.md loading for triage/ops workflows, pre-agent-steps run custom GitHub Actions before the AI agent starts, and a security hardening pass now sanitizes the working tree of planted executables before each run. MCP config also moved from .mcp.json to .github/mcp.json and a new TBT (Time Between Turns) metric tracks prompt caching effectiveness.
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