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ic-reactor: Instructions file for Claude Code

CLAUDE.md

ic-reactor CLAUDE.md is an instructions file for Claude Code from B3Pay/ic-reactor. It costs 1,477 tokens per session, scanned A, original, MIT.

Project-specific instructions for working on B3Pay’s ic-reactor codebase, including its purpose, packages, ownership, and available skills.

In plain words
What is it for?
Use it when asking an agent to modify, review, or document the ic-reactor project.
Why use it?
It gives a coding agent the project context and rules it needs before changing code.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

This is B3Pay/ic-reactor's own configuration. It tells Claude Code how to work on ic-reactor itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ic-reactor configures →

not rated 20repo changed 4d ago A scan 1,477 tokens original MIT
View source ↗ B3Pay/ic-reactor b3pay.net
Reuse

Borrowing it

Nothing to install: this file belongs to B3Pay/ic-reactor. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/B3Pay/ic-reactor/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/B3Pay/ic-reactor

Made for: Claude Code.

Wrote this? Show the measurements

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Per session 1,477 This file is loaded in full into every session.
When invoked 1,477 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.01477 $0.01477
Opus 5.5 $0.00591 $0.00591
Sonnet 5.5 $0.00295 $0.00295
Haiku 4.5 $0.00148 $0.00148

Measured 4d ago against content hash 587b0ed5af48, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ic-reactor CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — IC Reactor Project Context

This file gives Claude-based agents the context of this repository. Task routing and verification by change type are in AGENTS.md.

Branches

  • main (this branch) is the line of ic-reactor 4. Its release lane publishes a stable 4.x version under npm's latest dist-tag and a 4.x prerelease under beta (scripts/release-tag.mjs).
  • v3 is the 3.x line, cut from main at the 4.0 GA flip: security fixes only, until 90 days after the 4.0 release, released with its own workflows. v4, the branch 4 was developed on until GA, was retired on 2026-10-26.

Open pull requests for ic-reactor 4 against main, and 3.x security fixes against v3.

What ic-reactor 4 is

A thin layer over a module that meant gen generates from a .did file, plus one consumer guide. There are no typed handles. No package code on this branch is written against unpublished Meant shapes: core's peer @meantjs/schema and the Vite plugin's peer @meantjs/cli are pinned exactly to published stable releases.

Packages on this branch

Package Directory State on main
@ic-reactor/core packages/core 4.1.0; createClient, ReactorError, the units helpers and their types (13 names), and ./testing with createTestClient
@ic-reactor/react packages/react 4.1.0; ReactorProvider, useClient, useAuth and ReactorProviderProps, over a core client
@ic-reactor/vite-plugin packages/vite-plugin 4.1.0; generates the module with @meantjs/cli in a child process, and sets the ic_env cookie and /api proxy

Read the full file on GitHub · 93 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago Changed · -9 tokens per session 587b0ed5af48
  2. 6d ago Changed · +5 lines · +112 tokens per session 1b4647f57901
  3. 10d ago Changed · -156 lines · -3,429 tokens per session a17c7b4bc2ae
  4. 1mo ago Changed · +1 lines · +28 tokens per session 5dd7b9778311
  5. 1mo ago Changed · +65 lines · +1,906 tokens per session 766bb9726436
  6. 1mo ago Changed · +7 lines · +149 tokens per session 44f5135198a9
  7. 1mo ago Changed · +1 lines · +41 tokens per session cc5a2dc0f37c
  8. 1mo ago Changed 8198e4135913
  9. 2mo ago Changed · +16 lines · +276 tokens per session fd8f28b4ce21
  10. 2mo ago First seen · 154 lines · 2,403 tokens per session scan A adc3f62248d6

Subscribe to this mod's changes

ic-reactor CLAUDE.md is an instructions file published in the GitHub repository B3Pay/ic-reactor (20 stars, last pushed yesterday), licensed MIT. It adds 1,477 tokens to every session, about $0.0059 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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ic-reactor CLAUDE.md compared with instructions from other repositories

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