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Trustworthy artificial intelligence cannot be established permanently before deployment because deployed and adaptive systems operate within environments that continue to change. Data distributions, relationships between inputs and outcomes, user behaviour, organizational workflows, system dependencies, and decision consequences may diverge from the conditions represented during development. This article proposes a continuous trustworthiness lifecycle for organizing the evidence and governance activities needed after deployment. The approach begins with a versioned deployment context and risk baseline, followed by monitoring of data, concept, behavioural, performance, calibration, uncertainty, and explanation changes. It integrates technical monitoring with human interpretation, user and affected-person feedback, incident identification, corrective action, accountability review, model restriction, temporary suspension, retirement, and assurance updating. The framework distinguishes drift signals from confirmed degradation and treats explanation stability as a separate assurance concern rather than assuming that stable predictive performance preserves explanation quality. Incidents and complaints are positioned as lifecycle evidence that may trigger investigation, remediation, updating, rollback, restriction, suspension, or retirement review. These responses remain human-governed because monitoring indicators cannot independently determine safety, ethical acceptability, legal compliance, or appropriate end-of-life decisions. The main contribution is a conceptual lifecycle that connects post-deployment monitoring with decision records, responsibility allocation, residual-risk communication, and organizational learning. It supports structured reasoning about whether an adaptive AI system should continue operating unchanged, undergo correction, operate within a narrower scope, be suspended, or enter retirement review. The framework requires domain-specific evaluation and institutional governance and should not be interpreted as an implemented assurance process, certification model, or deployment-readiness determination.