Claude Code mod
jr-next-cost
What the next prompt costs before you send it, on /jr-next-cost: the context it resends at the current model's price, read from a warm cache or written to a cold one, at API rates.
Install
/plugin marketplace add jrlprost/claude-code-mods
/plugin install jr-next-cost@claude-code-modsMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L1Reads: reads mod state, persists state, draws
- Draws in
AbovePrompt- Hooks
session.endsession.startturn.completecommand.runui.render
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- jrlprost/claude-code-mods
- Folder
plugins/jr-next-cost- Marketplace
claude-code-mods- Author
- jrlprost
- License
- MIT
- Last updated
- 25 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is jr-next-cost?
What the next prompt costs before you send it, on /jr-next-cost: the context it resends at the current model's price, read from a warm cache or written to a cold one, at API rates. It is a mod for Claude Code, from jrlprost/claude-code-mods on GitHub.
What can the jr-next-cost mod access?
Its widest reach is "reads" (reads mod state, persists state, draws). It draws in AbovePrompt. Like any mod, it runs with your permissions.
How do I install jr-next-cost?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add jrlprost/claude-code-mods and then /plugin install jr-next-cost@claude-code-mods.
Is jr-next-cost popular?
jrlprost/claude-code-mods has 4 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 25 October 2026.
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