Architecture, safety, and the work in front of us.
Working notes from Widal, long enough to make the argument, short enough that an engineer can finish them between commits. Some are summaries of papers, some are field reports, some are arguments we want to settle in writing.
The fractional, forward deployed CTO One person, two jobs, done in the codebase.
Why healthcare operators need a senior who can run the standup, write the merge commit, and sit across from the board, all in the same week. The Widal fractional CTO model.
The safe intake agent Typed evidence before the clinical workflow.
Identity, consent, eligibility, OCR-borne attacks. The same architecture as the triage paper, applied one step upstream, proposed by the model, authorized by policy.
The model is not the rule engine Building a safe medical triage agent.
A short read of the Widal failsafe triage architecture: bounded inference, deterministic control, trusted policy, abstention under uncertainty, and continuous team-visible evaluation.
RePPIT Health: a compliance-aware coding agent workflow
Research, propose, plan, implement, test, secure. A Claude Code plugin that gates HIPAA, SOC 2, and HITRUST at every phase of the workflow. Open source, Apache 2.0.
Open source · Agentic tooling8 min readWhich frontier model for which clinical job
Claude, GPT, and Gemini selected against five healthcare job classes: extraction, summarization, structured tool-use, safety-constrained dialogue, long-context retrieval. A working rubric.
Model selection · Architecture9 min readCompliance is a code property
HIPAA, SOC 2, and HITRUST as artifacts that ship in the diff. PHI boundaries in the schema, audit rows by actor, encryption key custody, BAA-scoped vendor lists. Not slides.
Compliance · Architecture8 min readBrownfield wedges, not replatforms
Lifting a twenty-year monolith into agent-native rails without a rebuild. Parity tests, shadow runs, canary cohorts, fail-closed reverts. The wedge as runway, not endpoint.
Architecture · Brownfield8 min readWhy we ship CLAUDE.md on day one
The agent-native scaffolding that goes into every Widal repo: a versioned context file, skills, slash commands, tool registry, eval gates. The model reads the repo, not just the prompt.
Engagement · Tooling7 min readHow to integrate AI in telehealth platforms
Transforming virtual care through intelligent automation, enhanced diagnostics, and personalized patient experiences.
AI · Healthcare8 min readCash-pay primary care: a sustainable model for independent practices
How cash-pay models help primary care physicians build sustainable, patient-focused practices.
Business models12 min readThe AI revolution in direct-to-patient care: what's next?
How artificial intelligence is transforming direct-to-patient care models and creating new opportunities for healthcare providers.
AI · Healthcare6 min readBuilding scalable telemedicine platforms: lessons learned
Key insights from developing telemedicine platforms that handle millions of patient consultations.
Platform development5 min readNew revenue models transforming local healthcare
How innovative revenue models help local healthcare providers thrive in a changing landscape.
Healthcare innovation7 min readAI-powered clinical decision support: real-world applications
How AI is enhancing clinical decision-making and improving patient outcomes in real healthcare settings.
AI · Healthcare8 min readHIPAA compliance for HealthTech startups: a complete guide
Essential HIPAA compliance strategies for healthcare technology startups building patient-facing applications.
Compliance8 min readHealthcare data interoperability: breaking down silos
Strategies for achieving true healthcare data interoperability and improving patient care coordination.
Data · Interoperability7 min read