Borrowing it
Nothing to install: this file belongs to zachgoldfine44/mechinterp-replication. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/zachgoldfine44/mechinterp-replication/main/CLAUDE.mdgit clone --depth 1 https://github.com/zachgoldfine44/mechinterp-replicationWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/zachgoldfine44/mechinterp-replication/claude-md)<a href="https://agentmods.dev/instructions/zachgoldfine44/mechinterp-replication/claude-md"><img src="https://agentmods.dev/badge/instructions/zachgoldfine44/mechinterp-replication/claude-md.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.09216 | $0.09216 |
| Opus 5 | $0.04608 | $0.04608 |
| Sonnet 5 | $0.01843 | $0.01843 |
| Haiku 4.5 | $0.00922 | $0.00922 |
Grade A, and why
mechinterp-replication CLAUDE.md scanned grade A with 1 finding 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 8d 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
subprocess.run(["git", "clone", How it starts
The opening of the file, as written. The whole thing — 769 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mechinterp Replication Engine — Operational Guide
For humans: If you're looking for an overview of what this project is and how to use it, see README.md. If you want to contribute a replication or improve the harness, see CONTRIBUTING.md.
This file is the operational guide for Claude Code agents (and power-users who want to understand the internal conventions). It documents session workflow, commit cadence, storage layout, and coding standards that the autonomous development pipeline relies on.
What is this?
A general-purpose framework for replicating mechanistic interpretability papers across multiple open-source model families (Llama, Qwen, Gemma) at various scales, then writing up the results.
Think of it like a replication study in psychology: same experimental protocol, different populations (models), measuring what transfers and what doesn't. But instead of one paper hardwired in, this is a replication engine — you feed it a paper config, and it designs experiments, runs them, and writes up whether the findings generalize.
Quick reference
- Design document:
DESIGN.md(framework architecture, replication protocol) - Mech-interp guardrails:
GOTCHAS.md(preflight + post-result checklists — read before designing experiments and after every positive result) - Harness changelog:
CHANGELOG.md(framework-level changes only —src/,tests/,scripts/, repo-level docs) - Per-replication milestone log:
writeup/{paper_id}/{replication_id}/PROGRESS.md(big-picture state of THIS specific replication — read first every session, after you know which replication you're on) - Per-replication changelog:
writeup/{paper_id}/{replication_id}/CHANGELOG.md(append-only work-unit log for this replication — your incremental memory) - Active paper:
config/papers/{paper_id}/— paper text + stimuli, with one subfolder per replication underreplications/ - Active paper config:
config/papers/{paper_id}/replications/{replication_id}/paper_config.yaml(per-replication; paper-levelpaper_config.yamlexists in legacy layouts) - Paper as ground truth:
config/papers/{paper_id}/paper.md(full paper text — see "Paper as oracle" below) - Model matrix:
config/models.yaml
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.
- 8d ago First seen · 769 lines · 9,216 tokens per session scan A 04137e6b1fa1
mechinterp-replication CLAUDE.md is an instructions file published in the GitHub repository zachgoldfine44/mechinterp-replication (11 stars, last pushed 4mo ago), licensed MIT. It adds 9,216 tokens to every session, about $0.0461 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.