Vantage is a free, open-source cost and usage monitor, guardrail and session log for coding agents. Start your agent with vantage run <agent> and work as usual: Vantage shows what the session costs and how much of your limit is left, asks before the agent touches the files and commands you care about, warns you when a secret is sent to the API, and records everything so you can look back. Everything stays on your machine. Vantage sends no telemetry and changes nothing in your agent's setup.

Why?

Limits arrive without warning. On a subscription, you find out you hit the 5-hour limit when the agent stops mid-task. Vantage shows your quota live, forecasts whether your pace lasts until the reset, and warns you before you hit it.
"Allow everything" or "ask every time". Vantage lets you allow npm test, ask before git push --force, and ask before anything reads .env.
Secrets leave your machine silently. When the agent reads a .env file, the password goes to the API with the next request. Vantage tells you right away what it was and where it came from, so you can rotate it.
What did it actually do? After a long session it is hard to tell what changed. Vantage ends every session with the files it changed and keeps a searchable timeline of prompts, replies and tool calls.

Features

Cost and limits, live. Tokens, estimated cost at the official list prices of Anthropic, OpenAI and Google, and on a subscription the 5-hour and weekly quota with a forecast.
Budgets. Past a cost or quota limit you set, every action needs your approval.
Approvals by action type, file and command. Allow, warn, ask or deny file reads, writes, shell commands and network access, or specific files and commands.
Alerts in the chat. Secret warnings, low quota and budgets appear in the agent's chat, right after the reply.
Live view. vantage watch in a second terminal shows what the agent is doing, from any folder, and several sessions side by side.
Session replay, stats and search. Every prompt, reply and tool call as a timeline; usage over days and projects; find the session that read a file or ran a command.
Change summary. In a git repository, every session ends with the files it changed. Or run fully isolated in a separate git worktree.
Project memory. Decisions and conventions in .vantage/memory/, given to the agent at every start.

Why?

Limits arrive without warning. On a subscription, you find out you hit the 5-hour limit when the agent stops mid-task. Vantage shows your quota live, forecasts whether your pace lasts until the reset, and warns you before you hit it.
"Allow everything" or "ask every time". Vantage lets you allow npm test, ask before git push --force, and ask before anything reads .env.
Secrets leave your machine silently. When the agent reads a .env file, the password goes to the API with the next request. Vantage tells you right away what it was and where it came from, so you can rotate it.
What did it actually do? After a long session it is hard to tell what changed. Vantage ends every session with the files it changed and keeps a searchable timeline of prompts, replies and tool calls.

Features

Cost and limits, live. Tokens, estimated cost at the official list prices of Anthropic, OpenAI and Google, and on a subscription the 5-hour and weekly quota with a forecast.
Budgets. Past a cost or quota limit you set, every action needs your approval.
Approvals by action type, file and command. Allow, warn, ask or deny file reads, writes, shell commands and network access, or specific files and commands.
Alerts in the chat. Secret warnings, low quota and budgets appear in the agent's chat, right after the reply.
Live view. vantage watch in a second terminal shows what the agent is doing, from any folder, and several sessions side by side.
Session replay, stats and search. Every prompt, reply and tool call as a timeline; usage over days and projects; find the session that read a file or ran a command.
Change summary. In a git repository, every session ends with the files it changed. Or run fully isolated in a separate git worktree.
Project memory. Decisions and conventions in .vantage/memory/, given to the agent at every start.

vantage.ai

See and control what your coding agent does.

See and control what your coding agent does.