Home · Claude Code mods · keep1st.com/
A curated list of Claude Code mods — plugins whose behavior is a JS/TS hooks module exporting register(on). Not Agent Skills. Not MCP. Requires Claude Code 2.1.287+.
Definition: A Claude Code mod is a plugin whose behavior lives in a JS/TS hooks module exporting register(on, options), with hooks/hooks.json listing modules. Not generic Agent Skills.
Official blog: Getting started with Claude Code mods · Addy Osmani · 2026-10-01 · 2.1.287+
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Anthropic
Built-in: load AGENTS.md as project instructions (options for CLAUDE.md coexistence / managed-only).
Why it is here: First user-facing built-in mod; proves mods can change prompt.context and instruction loading without spending tokens.
Ships with Claude Code (builtin marketplace). Configure via /config 'Project instructions' or pluginConfigs agents-md@builtin. Live since ~2.1.277.
Firstmate (kunchenguid)
Hides tool rows / mid-turn working notes; replaces spinner with animated sailboat. Toggle /calm. Zero tokens.
Why it is here: Highest-signal community UX mod; pure presentation rewrite via ui.render — nothing deleted from transcript/model context.
git clone https://github.com/kunchenguid/firstmate && claude --plugin-dir ./firstmate/.claude/mods/firstmate-calm # No marketplace; stars count is for Firstmate distro as a whole.
zenbu-labs
Real Chromium in a Claude Code pane (kitty graphics). /browser [url]; optional agent tools; $.browser API for other mods.
Why it is here: Best-in-class pane + host-process bridge; previews localhost apps Claude is editing; requires ghostty/kitty/libghostty.
brew install terminal-browser claude plugin marketplace add zenbu-labs/terminal-browser claude plugin install terminal-browser@terminal-browser
Ray Amjad
Reversible redaction of secrets, emails, IPs before the model sees them; restores real values into tool calls.
Why it is here: Must-have privacy mod; classic rewrite-on-the-way-up pattern on prompt.submit / tool.call / prompt.context.
claude plugin marketplace add ray-amjad/awesome-claude-code-function-hooks claude plugin install secret-redactor@awesome-claude-code-function-hooks
Addy Osmani / Anthropic tutorial (DIY)
Live context-window forecast above the prompt: weather icon/word by fill %, tokens used/window, sparkline of last 12 turns, delta from last turn.
Why it is here: Canonical first mod from the official 2026-10-01 guide; teaches ui.render AbovePrompt, $.session.usage, $.state, and hot reload.
Build from the official blog (~80 lines) or ask Claude: 'Make me a Claude Code mod called token-weather…'. Then: claude --plugin-dir ./token-weather OR package into a marketplace and /plugin install token-weather@<marketplace>
Karan Bansal
Blocks one cold prompt-cache send with price estimate; /keepwarm pings to keep 1h cache alive; scores cold-write cost.
Why it is here: Direct money saver for API-key users; also teaches prompt.submit guards + $.model.fork keepwarm.
claude plugin marketplace add karanb192/claude-code-mods claude plugin install cache-tax@claude-code-mods
Addy Osmani / Anthropic tutorial (DIY)
Before a risky Bash command runs, show what it would change (answer-move intercept). Hooks tool.call{Bash} plus ui.render for Pane and AbovePrompt.
Why it is here: Shows the 'answer' middleware pattern: deny/replace without calling next — the key difference from observe-only overlays.
No standalone public marketplace repo found under this exact name for the tutorial mod; reconstruct from blog.
Follow the Blast Radius section of the official mods blog (not a published marketplace package as of 2026-10-02). Ask Claude to build it from the blog description, then claude --plugin-dir ./blast-radius
Addy Osmani / Anthropic tutorial (DIY)
Records Edit/Write old→new text during a turn; after turn.complete, hint above prompt; /replay or 'r' opens a pane that steps through diffs with Prev/Next/Close.
Why it is here: Teaches pairing turn.start/turn.complete, reading files with $.fs.read for real diffs, slash-command registration, and adaptive pane placement.
No standalone marketplace package found; reconstruct from blog.
Build from the Replay Theater section of the official mods blog. Register /replay via $.command.register; load with claude --plugin-dir ./replay-theater
Thomas Stagl
btop-style live pane: context fill, cost, cache hit, rate limits, tool latency, subagents; /cctop.
Why it is here: Most complete session observability pane; pairs with companion binary for deep stats.
brew install tomstagl/tap/cctop claude plugin marketplace add tomstagl/cctop claude plugin install cctop@cctop
Amir Shayegh / Storybloq
Project memory board of tickets/issues in .story/ in a pane beside the transcript; resume across sessions.
Why it is here: Top context/memory mod by directory stars; durable project state beyond the chat window.
See https://claude-mods.com/storybloq/ and Storybloq README (plugin-archive /configure flow). Repo: Storybloq/storybloq
Anthropic
Built-in: /diff pane of uncommitted changes beside the transcript, refreshed as Claude edits and runs commands.
Why it is here: Reference implementation for panes, PaneModel, and test kit (claude plugin test).
Built into Claude Code. Source loadable for study: claude --plugin-dir mods/diff (from anthropics/claude-code checkout).
Anthropic
Built-in org guard: keeps managed hooks, CLAUDE.md, settings, MCP allowlist out of reach of user-installed plugins. Seated outermost on managed/Team/Enterprise.
Why it is here: Ordered authority pattern for enterprises; outermost seat in the hook chain.
Automatic on managed / Team / Enterprise machines.
Seza Akgün
Nine games + pet above the prompt while Claude works (Snake, Tetris, Doom clone, etc.). Zero tokens. /arcade
Why it is here: Boris Cherny amplified; best-known 'while you wait' L0 mod; proves AbovePrompt games + tool.call pet feeding.
claude plugin marketplace add sezaakgun/cc-arcade claude plugin install cc-arcade@cc-arcade
Anthropic
Built-in: provides $.telemetry for first-party plugins; refuses installed plugins; silent under DO_NOT_TRACK / Bedrock / Vertex / Foundry.
Why it is here: Shows noun contracts / engine.create folds — how mods extend $ itself.
Built-in (not for third-party use of $.telemetry).
halluton
Guided breathing band above the prompt while Claude works (coherent, box, 4-7-8, sigh). Zero tokens.
Why it is here: Early high-star L0 demo of AbovePrompt + turn boundaries without seeing prompts.
claude plugin marketplace add halluton/Mindful-Claude claude plugin install mindful-claude@mindful-claude
Karan Bansal
Rewrites every subagent spawn to the Fable model; /fable-pin on|off|status.
Why it is here: Clean agent.spawn rewrite example; ships with mod-builder skill in same marketplace.
claude plugin marketplace add karanb192/claude-code-mods claude plugin install fable-pin@claude-code-mods
Pedro Almeida / lossless-claude
Lossless context management: DAG summarization in SQLite so every message stays reachable/expandable.
Why it is here: Serious context engineering as a mod (L3 network reach per scanner — review footprint before install).
Install marketplace shorthand not double-checked from live install page; confirm on claude-mods.com/lcm/ before production use.
claude plugin marketplace add lossless-claude/lcm # verify marketplace.json name on install page # See https://claude-mods.com/lcm/ and awesome list
Karan Bansal
Skill+mod toolkit that plans capability budget, validates with claude plugin validate, and writes threat models before code.
Why it is here: Best way to author mods safely given in-process privilege model; ties into awesome footprint scanner.
claude plugin marketplace add karanb192/claude-code-mods claude plugin install mod-builder@claude-code-mods
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