baerly-storage: Instructions file for Claude Code

CLAUDE.md

baerly-storage CLAUDE.md is an instructions file for Claude Code from Gusto/baerly-storage. It costs 6,922 tokens per session, scanned A, original, Apache-2.0.

A project instruction file for baerly-storage, a document database that stores data through S3-compatible object storage services such as Amazon S3.

In plain words
What is it for?
Use it when changing the database, HTTP server, deployment templates, publishing process, or tests for the baerly-storage project.
Why use it?
It gives coding agents the repository's tool choices, architecture, verification rules, and conventions in one place.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

This is Gusto/baerly-storage's own configuration. It tells Claude Code how to work on baerly-storage 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 baerly-storage configures →

Reuse

Borrowing it

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

Made for: Claude Code.

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Per session 6,922 This file is loaded in full into every session.
When invoked 6,922 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 $0.06922 $0.06922
Opus 5.5 $0.02769 $0.02769
Sonnet 5.5 $0.01384 $0.01384
Haiku 4.5 $0.00692 $0.00692

Measured 7d ago against content hash b5dc750fadd2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

baerly-storage 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 7d 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 · 382 lines

How it starts

The opening of the file, as written. The whole thing — 382 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Guidance for AI coding agents working in this repo. Keep this file lean — only content that cannot be inferred from the code belongs here.

What this is

baerly-storage is a vendorless document database that runs over any S3-compatible storage API. The data lives in your bucket; the protocol kernel is small enough that an LLM can use the public API zero-shot from the .d.ts files alone. Theoretical foundations live in docs/.

Current state: Open source under Apache-2.0, published publicly as @gusto/baerly-storage (and the @gusto/create-baerly-storage scaffolder) on npm (npmjs.com) with publishConfig.access: "public". See docs/contributing/publishing.md for the publish workflow.

The protocol kernel and HTTP server are landed. Day-1 templates ship for Cloudflare Workers and self-hosted Node; both are first-class. AWS Lambda / Bun / Deno / Fly are an adapter package away.

Toolchain

Read packageManager + devDependencies in package.json. Don't introduce alternate tooling without justification.

Verification

Under Claude Code, vitest runs use the compact minimal reporter — vitest 4.1 auto-detects AI-agent environments, and the repo config (vitest.config.ts) additionally pins this behavior when CLAUDECODE=1 is set so it isn't silently broken by detection changes. Failures still print in full. Override with --reporter=dot for long suites (test:randomize, test:fuzz-maintenance) when progress signal matters more than compactness, or --reporter=default to force the full reporter. pnpm verify / pnpm test is what humans run before pushing. pnpm verify is split into verify:code (the whole chain minus markdown) and verify:docs (markdown/mermaid validation); verify runs both. The lefthook pre-commit hook runs them by glob — verify:code when a .ts/.tsx file is staged, verify:docs when a .md file is staged (so a docs-only commit is now validated locally too, and a code-only commit skips the markdown checks it can't affect) — plus a scoped pnpm bundle-sizes (see below), but NOT the full pnpm test suite. pnpm verify:agent / pnpm test:agent are explicit compact-output variants for environments where the env var isn't propagated.

Read the full file on GitHub · 382 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. 7d ago Changed · -2 tokens per session b5dc750fadd2
  2. 2mo ago First seen · 382 lines · 6,924 tokens per session scan A 07421d5d2020

Subscribe to this mod's changes

baerly-storage CLAUDE.md is an instructions file published in the GitHub repository Gusto/baerly-storage (25 stars, last pushed today), licensed Apache-2.0. It adds 6,922 tokens to every session, about $0.0277 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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