What is day-ai-sdk CLAUDE.md?

Project instructions for Claude Code that describe the Day AI software development kit, its goals, architecture, and main components.

Use them when modifying or explaining the day-ai/day-ai-sdk project.

They give the coding agent project-specific context so it can work with the repository’s structure and terminology.

How day-ai/day-ai-sdk configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to day-ai/day-ai-sdk. 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/day-ai/day-ai-sdk/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/day-ai/day-ai-sdk

Made for: Claude Code.

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README.md

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Per session 1,883 This file is loaded in full into every session.

When invoked 1,883 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.

Model	Per session	Once invoked
Fable 5.1	$0.01883	$0.01883
Opus 5.5	$0.00753	$0.00753
Sonnet 5.5	$0.00377	$0.00377
Haiku 4.5	$0.00188	$0.00188

Measured yesterday against content hash 206b505bc959, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

day-ai-sdk 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 yesterday.

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 · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Day AI SDK - Claude Context

What This Is

Day AI SDK is a TypeScript/Node.js SDK for building AI-native applications that integrate with Day AI's CRM platform. This repo provides:

Core SDK (src/) - OAuth 2.0 + MCP client for Day AI platform
Example Apps (examples/) - Reusable templates for building AI-powered tools

The Vision

Day AI is an AI-native CRM with rich contextual business data (contacts, opportunities, meetings). This SDK enables developers to build specialized object-of-work interfaces that are deeply integrated with the CRM from day one.

Instead of standalone apps, developers clone example templates and build tools that can instantly query Day AI for context across contacts, opportunities, meetings, and more - all in natural language optimized for LLM agents.

Architecture

User's App (Electron/CLI/Web)
    ↓
Day AI SDK (OAuth + MCP Client)
    ↓
Day AI Platform (AI-native CRM)
    ↓ (MCP Tools)
Contacts, Opportunities, Meetings, Pages, etc.

The platform is a remote MCP server at https://day.ai/api/mcp. Claude (web, desktop, Claude Code) can also connect to it directly as a connector, with no SDK in between.

The Object-of-Work Pattern

Notes app stores freeform text ("Urgent Bugs", "Q1 Opportunities")
AI agent can read notes AND query Day AI CRM
User gets answers combining their notes + full CRM context
Natural language everywhere (no rigid forms)

Every example app is built this way: one object the user works on, an agent that can read and change it, and Day AI for everything around it.

Example Apps

These are templates: clone one and make it yours.

Desktop (examples/desktop/) - Electron notes app. Notes list on the left, editor in the center, Claude chat with Day AI tools on the right. The agent loop is hand-written with the Anthropic SDK.
Desktop, Agent SDK (examples/desktop-claude-agent-sdk/) - The same app with the Claude Agent SDK running the loop. Note tools run as an in-process MCP server next to Day AI.
Vercel Cron (examples/vercel-weather-cron/) - Scheduled workflow that emails you daily through Day AI (send_notification_mcp, on plans that include it). The template for digests, reports and alerts.
Community Builder (examples/community-builder/) - Vite + Express agent that researches and builds a community list in Day AI.
Mobile (examples/mobile/) - React Native / Expo chat with Day AI tools.

Read the full file on GitHub · 122 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.

yesterday Changed · +4 lines · +102 tokens per session 206b505bc959
29d ago Changed · -142 lines · -898 tokens per session 7b048d888f32
2mo ago First seen · 260 lines · 2,679 tokens per session scan A ecdc00c1dd88

Subscribe to this mod's changes

day-ai-sdk CLAUDE.md is an instructions file published in the GitHub repository day-ai/day-ai-sdk (24 stars, last pushed yesterday), licensed MIT. It adds 1,883 tokens to every session, about $0.0075 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.

day-ai-sdk CLAUDE.md next to 6 instructions from other repositories
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day-ai-sdk: Instructions file for Claude Code