The First Working Expression: ~Cortisol Checker~

A language research beta

~Cortisol Checker~ estimates stress-associated language patterns in submitted text. It does not measure biological cortisol, diagnose a medical or psychiatric condition, or establish a person's health state. Its scores are research signals produced from language under a declared handler contract.

The name should always travel with that limitation. A memorable expression cannot be allowed to make a stronger scientific claim than its method supports.

What is implemented

The working path demonstrates:

• a canonical registered-expression record and version;
• a protocol trace to ~WellbecomingProtocol → ~~Emotion → ~~~Cortisol;
• an associated nonfinancial Word Wallet;
• public list and detail resolution;
• invited-user authentication and explicit analysis consent;
• a versioned checker handler;
• transient raw input, HMAC receipts, and sanitized optional saves;
• deletion, revocation, and logout boundaries;
• a Foundation interface with precomputed public samples.

These are infrastructure claims, not evidence that a language score is a clinical measure.

Why begin here

Language stress is a useful first case because context matters and overclaiming is easy. It forces the architecture to address consent, interpretability, identity context, privacy, and revision. A technically successful request can still be socially inappropriate; a plausible score can still be poorly calibrated.

Evaluation

Evaluation should compare deterministic handler behavior, test-retest stability, known counterexamples, cultural and linguistic variation, user interpretation, and harms from false confidence. Any validation study must state its population, reference measure, uncertainty, and exclusion criteria.

No public sample proves scientific validity. Samples demonstrate interface behavior without calling the analysis engine.

References and grounding

• Public Cortisol Checker page
• Canonical expression record
• Word Wallet Web expression API