deepfork: Instructions file for Claude Code

CLAUDE.md

deepfork CLAUDE.md is an instructions file for Claude Code from GerardoRdz96/deepfork. It costs 1,083 tokens per session, scanned A, original, MIT.

Project instructions for DeepFork, a Claude Code skill that studies an open-source repository and creates an explanation, a rebuildable description of its behavior, and a clean-room reimplementation.

In plain words
What is it for?
Use them when working on the DeepFork skill or applying it to understand and recreate another open-source project. A clean-room reimplementation is rebuilt from observed behavior without copying the original code.
Why use it?
They give the coding agent the project context and require it to verify claims against the repository instead of guessing how the code works.

Instructions file for Claude Code

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

This is GerardoRdz96/deepfork's own configuration. It tells Claude Code how to work on deepfork 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 deepfork configures →

Reuse

Borrowing it

Nothing to install: this file belongs to GerardoRdz96/deepfork. 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/GerardoRdz96/deepfork/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/GerardoRdz96/deepfork

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Per session 1,083 This file is loaded in full into every session.
When invoked 1,083 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 $0.01083 $0.01083
Opus 5.5 $0.00433 $0.00433
Sonnet 5.5 $0.00217 $0.00217
Haiku 4.5 $0.00108 $0.00108

Measured 2mo ago against content hash 98e9445ca1aa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

deepfork 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 2mo 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 · 45 lines

How it starts

The opening of the file, as written. The whole thing — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.

DeepFork — project context for Claude Code

DeepFork is an agent skill with one idea: don't fork the code, fork the design. Point it at any open-source repo and it produces a clean explanation of how the repo actually works, a rebuildable behavioral blueprint, and a clean-room reimplementation in your stack with your changes. Public OSS, MIT, repo GerardoRdz96/deepfork. Powered by graphify.

This file is authoritative project context. Verify claims against the code before acting; do not improvise facts about this repo.


What this repo is

DeepFork is not an application — it is a Claude Code skill distributed as a repo (works with any agent that reads skills). The whole product is the skill prompt plus its examples. There is no build, no package, no test suite to run here — the "execution" is an agent following skills/deepfork/SKILL.md against a target repo.

Repo layout (small by design — 7 tracked files):

  • skills/deepfork/SKILL.md — the skill. The entire pipeline lives here. This is the file you edit to change DeepFork's behavior.
  • examples/ — a worked run (micrograd).
  • assets/ — the banner. README.md — the public pitch. LICENSE — MIT.
  • deepfork-out/ — sample output artifact (the skill writes here at runtime; keep it out of any rebuilt repo).

The pipeline (what SKILL.md encodes — keep these invariants)

A license-gated reverse-engineering pipeline. Every phase's product is a file the user keeps; all outputs go to deepfork-out/<target-name>/.

  • Phase 0 — License gate (non-negotiable, never skip). Check the target's license (gh api repos/<owner>/<repo> --jq .license.spdx_id or the LICENSE file). Proceed only for OSI-approved licenses. No license = all-rights-reserved → stop (an understanding report from public code is still OK; no rebuild). Copyleft (GPL/AGPL) → warn that a closely-derived rebuild may carry obligations; recommend the rebuild also be open source. Record the verdict in LICENSE-GATE.md.
  • Phase 1 — Acquire. git clone --depth 1 <target-url> deepfork-out/<target>/source.
  • Phase 2 — Comprehend (the graph pass). Prefer graphify (graphify . is free/local tree-sitter AST; graphify cluster-only, graphify . --wiki). Fallback if absent: map entry points, manifest, dir tree, top-5 most-imported modules by hand. Then write UNDERSTANDING.md — load-bearing pieces (graphify's "god nodes"), data flow, the core trick, surprising couplings.
  • Phase 3 — Interrogate. Answer a rebuilder's questions via graphify query / path / explain (or direct reading); append to UNDERSTANDING.md § Interrogation. Read real code for anything still [INFERRED] the rebuild depends on.
  • Phase 4 — Blueprint. Write BLUEPRINT.md — a spec someone could build from without ever seeing the original source.
  • Phase 5 — Rebuild (clean-room). Build from the blueprint, tests first for the core mechanisms, milestone by milestone. Ship with ATTRIBUTION.md ("Design informed by reverse-engineering <original> (<license>). Implementation is original, built clean-room from a behavioral blueprint.").

Read the full file on GitHub · 45 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. 2mo ago First seen · 45 lines · 1,083 tokens per session scan A 98e9445ca1aa

Subscribe to this mod's changes

deepfork CLAUDE.md is an instructions file published in the GitHub repository GerardoRdz96/deepfork (11 stars, last pushed 3mo ago), licensed MIT. It adds 1,083 tokens to every session, about $0.0043 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 2026-08-31.

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