Claude Code mod

cost-ledger

Cost ledger across all chats: after every answer it records the chat cost (as /cost), tokens per model and model calls made by other mods. /ledger shows today, 7 and 30 days, total, history by model (days or weeks), projects and the most expensive chats; /ledger limits shows the API value in the current 5-hour and weekly window and in your subscription month, plus an estimate of the usage outside the ledger (claude.ai, phone); /ledger sync <folder> merges your devices through a shared folder (amounts only: no paths, projects or chat titles); /ledger help lists all commands, the current state and your settings. Observer only, no model calls.

4 starsContext & usage mods Plugin marketplaceValidates on Claude Code 2.1.316 Source

Install

Inside Claude Code
/plugin marketplace add FynnXland/fynn-mods
/plugin install cost-ledger@fynn-mods

Mods install like plugins. Run /reload-plugins or start a new session to load it.

What it can access

Reach
L2Writes or runs: writes files, reads files, persists state, draws
Sees
classic hooks
Draws in
CommandOutput
Hooks
session.startclassic.SessionStartclassic.UserPromptSubmitturn.completemodel.completemodel.forkmodel.classifysession.endcommand.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.
Claude Code docs

Details

Repository
FynnXland/fynn-mods
Folder
mods/cost-ledger
Marketplace
fynn-mods
Author
Fynn Hansen
Type
Context & usage mods
License
MIT
Last updated
19 October 2026
Listed in
awesome-claude-code-mods

FAQ

What is cost-ledger?

Cost ledger across all chats: after every answer it records the chat cost (as /cost), tokens per model and model calls made by other mods. /ledger shows today, 7 and 30 days, total, history by model (days or weeks), projects and the most expensive chats; /ledger limits shows the API value in the current 5-hour and weekly window and in your subscription month, plus an estimate of the usage outside the ledger (claude.ai, phone); /ledger sync <folder> merges your devices through a shared folder (amounts only: no paths, projects or chat titles); /ledger help lists all commands, the current state and your settings. Observer only, no model calls. It is a mod for Claude Code, from FynnXland/fynn-mods on GitHub.

What can the cost-ledger mod access?

Its widest reach is "writes or runs" (writes files, reads files, persists state, draws). It sees classic hooks. It draws in CommandOutput. Like any mod, it runs with your permissions.

How do I install cost-ledger?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add FynnXland/fynn-mods and then /plugin install cost-ledger@fynn-mods.

Is cost-ledger popular?

FynnXland/fynn-mods has 4 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 19 October 2026.

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