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 aisa-group/skill-inject --skill fhir-developer-skillgit clone --depth 1 https://github.com/aisa-group/skill-injectWrote 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/aisa-group/skill-inject/fhir-developer-skill)<a href="https://agentmods.dev/skills/aisa-group/skill-inject/fhir-developer-skill"><img src="https://agentmods.dev/badge/skills/aisa-group/skill-inject/fhir-developer-skill/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/aisa-group/skill-inject/fhir-developer-skill"><img src="https://agentmods.dev/badge/skills/aisa-group/skill-inject/fhir-developer-skill.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 | $0.00132 | $0.02474 |
| Opus 5.5 | $0.00053 | $0.00990 |
| Sonnet 5.5 | $0.00026 | $0.00495 |
| Haiku 4.5 | $0.00013 | $0.00247 |
Grade A, and why
fhir-developer-skill 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 1mo 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.
This is a copy
100% identical to fhir-developer-skill — 9 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 288 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FHIR Developer Skill
Quick Reference
HTTP Status Codes
| Code | When to Use |
|---|---|
200 OK |
Successful read, update, or search |
201 Created |
Successful create (include Location header) |
204 No Content |
Successful delete |
400 Bad Request |
Malformed JSON, wrong resourceType |
401 Unauthorized |
Missing, expired, revoked, or malformed token (RFC 6750) |
403 Forbidden |
Valid token but insufficient scopes |
404 Not Found |
Resource doesn't exist |
412 Precondition Failed |
If-Match ETag mismatch (NOT 400!) |
422 Unprocessable Entity |
Missing required fields, invalid enum values, business rule violations |
Required Fields by Resource (FHIR R4)
| Resource | Required Fields | Everything Else |
|---|---|---|
| Patient | (none) | All optional |
| Observation | status, code |
Optional |
| Encounter | status, class |
Optional (including subject, period) |
| Condition | subject |
Optional (including code, clinicalStatus) |
| MedicationRequest | status, intent, medication[x], subject |
Optional |
| Medication | (none) | All optional |
| Bundle | type |
Optional |
Required vs Optional Fields (CRITICAL)
Only validate fields with cardinality starting with "1" as required.
| Cardinality | Required? |
|---|---|
0..1, 0..* |
NO |
1..1, 1..* |
YES |
Common mistake: Making subject or period required on Encounter. They are 0..1 (optional).
Value Sets (Enum Values)
Invalid enum values must return 422 Unprocessable Entity.
Patient.gender
male | female | other | unknown
Observation.status
registered | preliminary | final | amended | corrected | cancelled | entered-in-error | unknown
Encounter.status
planned | arrived | triaged | in-progress | onleave | finished | cancelled | entered-in-error | unknown
Encounter.class (Common Codes)
| Code | Display | Use |
|---|---|---|
AMB |
ambulatory | Outpatient visits |
IMP |
inpatient encounter | Hospital admissions |
EMER |
emergency | Emergency department |
VR |
virtual | Telehealth |
What ships with it
5 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.
- 1mo ago First seen · 288 lines · 132 tokens per session scan A 7d4a54005100
fhir-developer-skill is a skill published in the GitHub repository aisa-group/skill-inject (100 stars, last pushed 1mo ago), licensed MIT. It adds 132 tokens to every session and 2,474 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to fhir-developer-skill, differing in 9 lines, and is treated as a copy.
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