janwilmake/agent-codemode

Let the scripts your coding agent writes call your connected MCP servers (no extra auth)

About agent-codemode

Code mode for the coding agent you already run — 40 tool calls in, 1 script out.

Your coding agent has already logged into every MCP server you use. This lets it stop calling them one tool at a time and write a script instead.

One real prompt — fetch every In Progress Linear ticket with its full body and count how many times "mcp" appears — measured both ways against a live workspace of 39 tickets:

into the model round trips --- --- --- as tool calls 262,159 chars (~65,500 tokens) 40, in sequence as one script 903 chars (~226 tokens) 1

290× less into context, 99.66% saved — and that is the floor, because in a tool-call loop those 262,159 characters are re-read on every subsequent turn, while the script pays once.

The round-trip column is the one you feel. Forty sequential calls each wait for a model to decide what to ask next; the script makes the same forty requests without stopping to think between them, so it finishes in the time the tool-call version spends on its first few.

And the answer is exact. Counting occurrences across 262,159 characters by reading them is something a model does approximately — the tool-call path would spend the 65,500 tokens and still be liable to return a wrong number.

Character counts are exact; token figures use the rough four-characters-per-token heuristic. Your own numbers will differ with your data — the ratio is the durable part.

The first user is the coding agent itself. Ask it to reconcile two trackers today and it does twenty tool calls, paying for every intermediate result twice — once into the model, once back out — and burn

From the project README.

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