Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add langcare/langcare-mcp-fhir --skill immunization-status-checkergit clone --depth 1 https://github.com/langcare/langcare-mcp-fhirWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/langcare/langcare-mcp-fhir/immunization-status-checker)<a href="https://agentmods.dev/skills/langcare/langcare-mcp-fhir/immunization-status-checker"><img src="https://agentmods.dev/badge/skills/langcare/langcare-mcp-fhir/immunization-status-checker/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/langcare/langcare-mcp-fhir/immunization-status-checker"><img src="https://agentmods.dev/badge/skills/langcare/langcare-mcp-fhir/immunization-status-checker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00122 | $0.03444 |
| Opus 5 | $0.00061 | $0.01722 |
| Sonnet 5 | $0.00024 | $0.00689 |
| Haiku 4.5 | $0.00012 | $0.00344 |
Grade A, and why
immunization-status-checker 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 9d ago.
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.
How it starts
The opening of the file, as written. The whole thing — 307 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Immunization Status Checker
Overview
Retrieve a patient's Immunization history from FHIR, compare against CDC-recommended immunization schedules (adult and pediatric), identify overdue and upcoming vaccinations, evaluate contraindications based on documented conditions and allergies, and optionally generate an ImmunizationRecommendation FHIR resource. See references/adult-immunization-schedule.md and references/pediatric-immunization-schedule.md for full schedule details, CVX codes, and contraindication criteria.
FHIR Resources Used
| Resource | Purpose | Key Fields |
|---|---|---|
| Immunization | Vaccination history | vaccineCode, occurrenceDateTime, status, patient, protocolApplied |
| ImmunizationRecommendation | Generated vaccine recommendations | recommendation[].vaccineCode, dateCriterion, forecastStatus |
| Patient | Age, sex for schedule determination | birthDate, gender |
| Condition | Contraindications, risk group identification | code, clinicalStatus |
| AllergyIntolerance | Vaccine component allergies | code, reaction, clinicalStatus |
| Observation | Pregnancy status, immune status labs | code, valueQuantity, effectiveDateTime |
Instructions
Step 1: Retrieve Patient Demographics
Tool: fhir_read
resourceType: "Patient"
id: "[patient-id]"
Extract birthDate (calculate age in years, months, days for pediatric precision), gender. Determine schedule type: pediatric (age < 19) or adult (age >= 19).
Step 2: Pull Immunization History
Tool: fhir_search
resourceType: "Immunization"
queryParams: "patient=[patient-id]&status=completed&_sort=-date&_count=100"
For each Immunization resource, extract:
vaccineCode.coding-- match CVX code (systemhttp://hl7.org/fhir/sid/cvx)occurrenceDateTime-- administration dateprotocolApplied[].doseNumberPositiveInt-- dose number in seriesprotocolApplied[].seriesStringorseriesDosesPositiveInt-- series name and total doses
Build a vaccine history table: Vaccine Name | CVX Code | Date Given | Dose # | Series.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 307 lines · 122 tokens per session scan A b6ef35914d9d
immunization-status-checker is a skill published in the GitHub repository langcare/langcare-mcp-fhir (55 stars, last pushed 5mo ago), licensed MIT. It adds 122 tokens to every session and 3,444 once invoked, about $0.0006 per session on Opus 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 2026-09-03.
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