Dual-terminal setup: Argon 4 builds, Carbon 4 advises

marfin @marfinxxOriginally posted 2026.10.29

Open original on X

THIS IS ACTUAL F*CKING GOLD Google just dropped Gemini 4 Carbon and it completely wipes the floor with Claude Opus 5.5 across the board The dual-terminal setup splits the cognitive stack so you get frontier reasoning on big calls without burning flagship rates on routine turns: here is how you run both terminals side by side Anthropic Claude Code terminal: claude --model sonnet --advisor opus Google Antigravity CLI terminal: agy --model argon-4 --agent carbon-advisor here is how both ecosystems split labor: > Sonnet and Argon run the main sessions, edit code, and execute tests > Haiku and Flash Cyber explore repos, scan security, and pull docs in parallel > Opus and Carbon stay on call as frontier advisors for high-leverage architectural calls > you stop burning flagship tokens on routine linter checks and file reads Advisors only step in at three critical choke points: > before a plan locks > when the same error shows up twice > before calling a PR done Sonnet and Argon build. Haiku and Flash explore. Opus and Carbon review JEV engineering is the same move one layer down: deterministic micro-forks (which file, which tool, retry or stop) resolve in 14ms at zero token waste, while frontier models handle architecture the full dual-terminal tree > Claude Code: Sonnet main build, Haiku search/grep/docs swarm, Opus on-call advisor > Antigravity CLI: Argon 4 main build, 3.8 Flash Cyber security swarm, Carbon 4 on-call advisor > JEV fork layer: sub-second routing across both terminal runtimes paste this setup and prompt into your agent workspace: "Configure my dual-terminal coding environment across Anthropic and Google runtimes: 1. In Claude Code, run the main session on Sonnet with Opus pinned as advisor > Spawn three Haiku subagents: search (repo map), grep (call sites), docs (api ref) > Add a rule to CLAUDE.md: consult Opus before plan locks, on repeated errors, and before PR merge 2. In Google Antigravity CLI, run the main session on Argon 4 with Carbon 4 pinned as advisor subagent > Deploy Gemini 3.8 Flash Cyber subagents for real-time security auditing and AST diff checks > Enforce Carbon 4 deep reasoning sign-off on long-horizon architectural migrations 3. Route deterministic micro-forks (path selection, tool gates, retries) through JEV Show every configuration diff first. Do not apply edits until confirmed" save this, you will use it every single day

This post quotes another post: x.com/marfinxx/status/2081687570488954915