# nLight.fit

> An AI fitness and life coach built on a daily commitment ledger. Users log habits, workouts, nutrition and body metrics; a coach with full-resolution memory of that history provides analysis, correlations and voice conversation. WHOOP, bloodwork and methylation genetics feed the same record. A read-only MCP server exposes it all to external AI clients.

Full corpus as a single document: https://nlight.fit/llms-full.txt

## Start

- [Overview](https://nlight.fit/docs/overview.md): What nLight.fit is - a daily commitment ledger with an AI coach that has full-resolution memory of your history, plus WHOOP, bloodwork and genetics.
- [Quickstart](https://nlight.fit/docs/quickstart.md): From a new nLight.fit account to a coached conversation grounded in your own data, in about ten minutes.
- [Concepts](https://nlight.fit/docs/concepts.md): The vocabulary nLight.fit uses - ledger, metric registry, learnings, Mission Statement, correlation tiers, feature store and more.

## Platform

- [The ledger](https://nlight.fit/docs/ledger.md): How daily tracking works in nLight.fit - columns, custom metrics, check-in frequency, immediate persistence and CSV import/export.
- [Metric reference](https://nlight.fit/docs/metrics.md): Every metric nLight.fit tracks: 59 canonical fields with types, units and analytical roles.
- [AI coach](https://nlight.fit/docs/ai-coach.md): How the nLight.fit coach decides what to read, how hard to think, and how it grounds answers in your actual record.
- [Voice agent](https://nlight.fit/docs/voice.md): Real-time spoken conversation with the nLight.fit coach, with modes for open chat, hands-free data entry and guided onboarding.
- [Mission Statement](https://nlight.fit/docs/mission-statement.md): One goal, three commitments - a structured declaration of intent that nLight.fit measures progress and causality against.
- [Analytics](https://nlight.fit/docs/analytics.md): What nLight.fit computes in the background - correlations with statistical controls, personal records, readiness, goal ETA, changepoints and narrative summaries.
- [Progress pictures](https://nlight.fit/docs/progress-pictures.md): Photo tracking in nLight.fit, stored against your record alongside the numbers.

## Integrations

- [WHOOP](https://nlight.fit/docs/whoop.md): Connect WHOOP to nLight.fit - OAuth, sync schedule, webhooks, and which recovery, sleep and strain metrics become columns.
- [Bloodwork](https://nlight.fit/docs/labs.md): Upload lab report PDFs to nLight.fit - biomarkers are extracted into a structured record with trends, reference ranges and behaviour correlations.
- [Methylation genetics](https://nlight.fit/docs/methylation.md): Upload a methylation genetic test to nLight.fit - a one-time profile that explains mechanisms and predicts which biomarkers to watch.

## Developers & Agents

- [MCP server](https://nlight.fit/docs/mcp.md): nLight.fit exposes your health record to external AI clients over the Model Context Protocol, as a stateless HTTP JSON-RPC endpoint with read-only tools.
- [MCP tool reference](https://nlight.fit/docs/mcp-tools.md): Every tool exposed by the nLight.fit MCP server: 16 read-only tools with full input schemas.
- [Authentication](https://nlight.fit/docs/authentication.md): How nLight.fit API tokens work - format, scopes, storage, revocation, and why they are not session tokens.
- [Client setup](https://nlight.fit/docs/clients.md): Connect Claude Code, Claude Desktop, Cursor or a custom client to the nLight.fit MCP server.
- [Token management](https://nlight.fit/docs/token-scripts.md): Minting, listing and revoking nLight.fit API tokens with the repo-local management scripts.
- [Errors and limits](https://nlight.fit/docs/errors.md): Status codes, JSON-RPC error codes, rate limits and protocol versions for the nLight.fit MCP endpoint.

## Trust

- [Security and privacy](https://nlight.fit/docs/security.md): How nLight.fit protects your data - encryption, authentication, AI safety, third-party handling, and an honest account of what is not protected.
- [Data model](https://nlight.fit/docs/data-model.md): What nLight.fit stores - collections, the shape of a tracked day, derived artifacts, and how the pieces relate.
- [Changelog](https://nlight.fit/docs/changelog.md): User-visible changes to the nLight.fit platform, newest first.