prompt-coach

🧩 claude-mods

Panels, guardrails and quality-of-life mods for Claude Code: see what fills your context, how fast you burn your plan, and what the agent is running right now, and block the commands you never want run.

<img src="docs/demo-guardrails.gif" alt="guardrails blocking an agent's oc delete all --all before it runs" width="900">

_{If a mod saves you from one bad approve, a ⭐ on this repo helps other people find it.}

What is this?

Claude Code is a black box while it works. You can't see the context window filling up until it compacts away the decision you made an hour ago. You find out you've burned your 5-hour limit when it stops answering. You approve a command, tab away, and come back ten minutes later to find it has been waiting on a second approval the whole time. And most people discover /rewind only after the edit they wanted to undo.

claude-mods is a set of small plugins that open that box. Each mod is a standalone Claude Code plugin built on function hooks, the in-process plugin API: it sees every prompt, tool call and turn as it happens, and it can draw panels, toasts and status lines inside Claude Code itself. Install all eleven or only the ones you want.

They are deliberately boring about tokens. Nine of the eleven never call a model. The two that do (prompt-coach's review and context-keeper's handoff note) say so and are easy to turn off.

✨ Features

🎬 See it in action

activity: what Claude is running right now, and the moment it's waiting on you

<img src="docs/demo-activity.gif" alt="activity panel showing thinking, waiting for approval, then completed tool calls" width="900">

context-keeper + usage-meter: what fills the window, a checkpoint saved to disk, plan limits

<img src="docs/demo-context.gif" alt="context panel, writing a checkpoint, then the usage meter" width="900">

prompt-coach: a vague prompt, a suggested rewrite, you choose

<img src="docs/demo-coach.gif" alt="prompt coach suggesting a sharper prompt and sending it" width="900">

command-hub: the built-in commands worth knowing, explained

<img src="docs/demo-commands.gif" alt="command hub listing essential slash commands" width="900">

🏗️ How it works

              You ──prompt──▶ ┌──────────────────────────────┐
                              │        Claude Code engine     │
                              │                               │
                              │  prompt.submit   tool.call    │
                              │  turn.start      turn.complete│
                              │  session.compact ui.render    │
                              └──────┬─────────────────▲──────┘
                       events, in    │                 │  allow · deny · rewrite
                       order, live   ▼                 │  panes · toasts · status
                              ┌──────────────────────────────┐
                              │  claude-mods (one plugin each)│
                              │                               │
                              │  guardrails ── may deny ──────┤
                              │  prompt-coach ─ may ask you ──┤
                              │  activity · changes · notify  │
                              │  usage-meter · context-keeper │──▶ .claude/checkpoints/
                              │  toolbox · command-hub ...    │──▶ OS notifications
                              └──────────────────────────────┘

What a mod sees. Each mod registers hooks on engine events. A tool.call hook sits in front of every tool the agent runs (Bash, Edit, MCP tools, subagents) and sees its real arguments before anything executes. That is how activity can show the exact command and guardrails can refuse it.

What it can change. A hook either passes the event on, rewrites it, or answers it itself. Guardrails answers with a denial the model reads ("blocked by the user's guardrails, don't work around it"). Prompt-coach never rewrites on its own: it asks you first, in Claude Code's own question dialog.

What it draws. Panels are ui.render hooks returning a small element tree (Box, Text, Button, Input) that Claude Code draws natively in the terminal and the desktop app. State lives in the engine ($.state), so panels survive a hot reload and redraw only when their data changes.

What it costs. Nothing, for nine of the mods. They read numbers the engine already has ($.session.usage(), $.tool.list(), $.command.list()). The two model calls are opt-out and listed under Honest limits.

🚀 Quick Start

Prerequisites: Claude Code 2.1.286 or newer (claude update). Panels dock beside the chat in the desktop app or a terminal ≥ 144 columns wide, and open inline in narrower terminals.

1. Add the marketplace and the manager

From any terminal:

claude plugin marketplace add mishgoldenberg/claude-mods
claude plugin install mod-manager@claude-mods

(In the Claude Code CLI you can also use /plugin marketplace add mishgoldenberg/claude-mods and the /plugin menu.)

2. Pick your mods

Restart Claude Code. The first session says hello once ("claude-mods ready: /mods to pick your set"). Type /mods: the manager lists every mod with what it does, whether it uses tokens, and whether an update is available. Install, turn on or off, update, or remove each one with a click, or apply a preset:

Presets turn off what they don't list and never remove anything. Changes apply in your next session.

3. Use the quickbar

With quickbar installed, a one-line bar sits above the prompt: live context % and a button for every installed panel. /quickbar (or its ×) hides it; /quickbar again brings it back.

Or just ask Claude: "Install the claude-mods plugins from github.com/mishgoldenberg/claude-mods. Follow its INSTALL-FOR-CLAUDE.md."

VS Code

The VS Code extension has no /plugin menu, so install from a terminal with the two commands in step 1, then use /mods inside VS Code. Mods need the extension to run Claude Code 2.1.286 or newer.

for m in quickbar context-keeper usage-meter notify activity guardrails          prompt-coach toolbox command-hub changes loop-breaker; do
  claude plugin install "$m@claude-mods"
done

Try one without installing

git clone https://github.com/mishgoldenberg/claude-mods.git
claude --plugin-dir claude-mods/plugins/activity --plugin-dir claude-mods/plugins/guardrails

💬 Commands

⚙️ Configuration Reference

Options appear in /config once a mod is installed, or go in ~/.claude/settings.json under pluginConfigs.<mod>.

context-keeper

usage-meter

notify

activity · prompt-coach · loop-breaker

guardrails rules

Guardrails turns on Safe defaults the first time it loads. /guard-preset off turns everything off.

Whatever the preset, while any rule is on:

• Scripts are checked before they run. A file the agent creates with Write in this session (and edits after that) is remembered, and when a shell command runs it (bash cleanup.sh, python tools/x.py, ./run, node a.mjs), its code is checked against your enabled rules and patterns first. os.system("rm -rf …") inside a Python file counts.
• The agent can't edit guardrails' own settings. Write/Edit on them, and the obvious shell writes (sed -i, >, tee, cp, mv, rm), are denied with the same "ask the user" message.
• Blocks are logged. Every block is kept for 30 days on this machine. The panel shows the last 7 days by rule, /guard-log prints a summary (/guard-log json for the raw list), and clear wipes it. Commands are cut to 200 characters.

🔒 Is it safe to install?

Mods run inside Claude Code with your permissions and no sandbox, so this is the right question to ask about any mod, including these. What these ones do:

• No network. No mod makes a web request, and there is no telemetry. Nothing leaves your machine except the two opt-in model calls below, which go through your own Claude Code session like any prompt.
• Processes they start, all of them: git diff --numstat (changes), the claude plugin CLI when you open /mods or click in it (mod-manager; only Install, Update and Check for updates go online, through Claude Code's own plugin installer), your OS notification tool (notify), and gh --version to see whether the GitHub CLI exists (toolbox).
• Files they write: checkpoints and pre-compaction archives under .claude/checkpoints/ (context-keeper), and a new slash command file when you use the form (command-hub). Settings, and guardrails' 30-day block log, live in Claude Code's own plugin store under ~/.claude. Nothing else.
• Model calls: prompt-coach and context-keeper's handoff note, both listed below and both easy to turn off.

Every mod is a few hundred lines of TypeScript in plugins/<mod>/hooks/register.tsx. Read the ones you install.

⚠️ Honest limits

• Guardrails is a seatbelt, not a sandbox. Rules are pattern checks on the commands and paths the agent passes to tools. Scripts the agent wrote this session are checked before they run, but a script that arrives another way (downloaded, generated by a shell command, already in the repo) or an obfuscated command gets through, and so can a shell trick that rewrites guardrails' settings. Quoted prose (commit messages, text written to files) is ignored so that mentioning rm -rf doesn't block you, except when the text is handed to a shell (bash -c, | sh, powershell -Command), which is checked. For hard guarantees use Claude Code's permission rules and sandboxing; use guardrails to catch the honest mistakes.
• prompt-coach costs a little. A reviewed prompt waits about a second for a small model, and uses a few hundred tokens. When you send the improved version, the chat still shows what you typed; a dim "prompt-coach sent the improved version" line below it shows what was actually sent. Short replies are never reviewed. /coach off turns it off.
• context-keeper's handoff note costs a little. It asks the model for a summary over the already-cached conversation, so it is mostly cache reads. The pre-compaction archive costs nothing.
• Function hooks are early access. A Claude Code update can break a mod. CI validates every mod against the engine's own validator, and issues are welcome.

🗂️ Project Structure

claude-mods/
├── .claude-plugin/
│   └── marketplace.json        The marketplace: one entry per mod
├── plugins/
│   ├── activity/
│   │   ├── .claude-plugin/
│   │   │   └── plugin.json     Name, description, userConfig options
│   │   ├── hooks/
│   │   │   ├── hooks.json      Points at the hooks module
│   │   │   └── register.tsx    The mod: hooks, commands, panel
│   │   ├── tests/
│   │   │   └── surfaces.test.tsx   The panel draws on every surface (claude plugin test)
│   │   └── types/
│   │       └── index.d.ts      Its $.state contract
│   ├── guardrails/             …same shape for every mod
│   └── …
├── docs/
│   └── design.md               The shared design spec and kit every mod copies
├── tests/
│   ├── guardrails-rules.test.mjs   Every rule against real commands
│   └── design-kit.test.mjs     Every mod's kit matches docs/design.md
├── INSTALL-FOR-CLAUDE.md       Steps Claude follows when asked to install
└── tsconfig.json               Type-checks all mods against the engine API

🔧 Extending it

Add a guardrail rule. Append an entry to RULES in plugins/guardrails/hooks/register.tsx (an id, a title, and a test that returns the offending text) and add cases to tests/guardrails-rules.test.mjs. The panel and presets pick it up automatically.

Add an essential command. One line in ESSENTIALS in plugins/command-hub/hooks/register.tsx. It only shows when that command exists in the user's Claude Code.

Write a new mod. Copy plugins/changes (a small mod with a panel) or plugins/loop-breaker (no UI), rename it everywhere, and add it to marketplace.json. Or ask Claude Code to "make a mod that …": it has a built-in skill for exactly this, with hot reload.

🤝 Contributing

Issues and pull requests are welcome. Start with CONTRIBUTING.md, which has the mod checklist.

npm install
npm run typecheck
npm test
claude plugin validate plugins/<mod>
claude plugin test plugins/<mod>

Every mod follows one design spec, docs/design.md: theme colors only (Claude orange as the single accent), the same pane header, glyphs, hotkeys and empty states, so the set feels like one product in any theme.

Two house rules worth knowing before you write anything, because the validator enforces both:

• Helpers that take $ must be top-level function declarations. A closure inside register that receives $ is rejected.
• Every $.state key is declared in the mod's types/index.d.ts, under the mod's name.

Found a way around guardrails, or another security problem? Please report it privately; see SECURITY.md.

📄 License

MIT © 2026 Michael Goldenberg