Claude Code mod

anvil

Keeps the prompt cache warm while you are away and stops an accidental cold send, draws a line above the prompt with the folder, git status, 5h and 7d usage and session cost, adds each reply's output speed to its closing line, and sets up a matching status line with /anvil:statusline

Context & usage mods Plugin marketplaceValidates on Claude Code 2.1.319 Source

Install

Inside Claude Code
/plugin marketplace add Mistakey/anvil
/plugin install anvil@anvil

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

What it can access

Reach
L2Writes or runs: runs processes, writes files, drives Claude, writes the prompt box, reads files, reads env vars, reads the prompt box, reads mod state, persists state, draws
Sees
classic hooks, subagent spawns, every tool call, compaction, every prompt
Draws in
TurnDurationAbovePrompt
Hooks
session.startclassic.SessionStartturn.stepturn.completeagent.spawntool.callsession.appendsession.measuresession.compactprompt.submitui.rendercommand.run

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
Mistakey/anvil
Folder
.
Marketplace
anvil
Author
kelch
Type
Context & usage mods
License
MIT
Last updated
6 November 2026
Listed in
awesome-claude-code-mods

FAQ

What is anvil?

Keeps the prompt cache warm while you are away and stops an accidental cold send, draws a line above the prompt with the folder, git status, 5h and 7d usage and session cost, adds each reply's output speed to its closing line, and sets up a matching status line with /anvil:statusline It is a mod for Claude Code, from Mistakey/anvil on GitHub.

What can the anvil mod access?

Its widest reach is "writes or runs" (runs processes, writes files, drives Claude, writes the prompt box, reads files, reads env vars, reads the prompt box, reads mod state, persists state, draws). It sees classic hooks, subagent spawns, every tool call, compaction, every prompt. It draws in TurnDuration, AbovePrompt. Like any mod, it runs with your permissions.

How do I install anvil?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add Mistakey/anvil and then /plugin install anvil@anvil.

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