The Problem With Choosing One Coding Agent
Switching agents meant rewriting project details from scratch. I started with Claude Code only. Later, ChatGPT and Gemini crept into my workflow. They cover the exact gaps where Claude Code falls short. Now I pay for three distinct AI tools. Every comparison ends the same way. One agent hits a usage limit or errors out. I move the project to another app. The most expensive part is re-explaining the project. All context lives in one app's chat history, which the next agent cannot see. Even if I point the second agent at the same folder, I must rewrite the context and provide a summary of my current status.
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MacBook Pro Battery Evolution: Comparing 2011 to 2026The project keeps its memory in the folder, not in any single app's chat history. Coding agents already look for instruction files when opening a folder. I exploit this mechanism. Claude Code looks for its own CLAUDE.md file. That file can import another file with a single line. Mine points to AGENTS.md. This is an instruction file that many coding agents, including Codex and Antigravity, have agreed to read. Practically, all three start with the same rules. AGENTS.md is the rulebook for all three. It is the only file I edit and update. CLAUDE.md never needs intervention. I used Claude to help create the skeleton for these files. The general pipeline resulted from my own inputs about how I move between these three applications.
How I Set Up One Folder for All Three
The rulebook orders every agent to read HANDOFF.md before touching any file. This is a continuous register. The newest note sits at the top. Each agent signs a note there before leaving. It specifies what was finished, what remains, and where the next agent should start. DECISIONS.md is another essential piece. Once a decision is made, it is recorded on that list. No agent can overturn it. If an agent disagrees, it flags the issue in the handoff note for me, instead of changing it alone. Without this rule, an agent could easily overturn a choice made by another agent in a prior session. I have not tested that scenario, and I do not want to, because it could break my projects.
What a Shared Folder Actually Changes
The rulebook also assigns each agent a domain based on its strengths. Antigravity handles visual verification in a browser. The other two share planning and repair tasks. Another component is that I let only one agent work in a folder at a time. This keeps the pipeline smoother in my experience. Handoffs in Claude Code and Codex go through a handoff skill. This is a saved set of instructions the agent follows when invoked by name. Since it is pure Markdown, I can open any of these files in Notepad anytime.
The first sign it worked was how each session opened. I gave no briefing. Codex read the folder and mentioned it was picking up from the last note. When Antigravity took over next, its first line named Codex as the agent it was continuing from. Claude Code did the same with Antigravity's handoff later. Part of my workflow now revolves around this shared directory. It eliminated the copy-paste marathon. Every agent starts with full context. No more re-explaining. No more lost decisions. The folder is the single source of truth.
