HIG Doctor
NPM · HIG-MCP · SCANNED SEP 20
Apple Human Interface Guidelines search, lookup, and project audits for AI coding agents.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 0 of 1 dependencies flagged as unhealthy. View diagnostics → Pass
Provenance & Transparency100
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to raintree-technology/hig-doctor). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 15 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability82
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 653 tokens (~108/item across 6 items; 6 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management93
- Stability observed for 28 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the HIG Doctor MCP server?
HIG Doctor runs locally as an npm package, launched with npx -y hig-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · hig-mcp
claude mcp add raintree-technology-hig-doctor -- npx -y hig-mcp
{
"mcpServers": {
"raintree-technology-hig-doctor": {
"command": "npx",
"args": [
"-y",
"hig-mcp"
]
}
}
} {
"servers": {
"raintree-technology-hig-doctor": {
"command": "npx",
"args": [
"-y",
"hig-mcp"
]
}
}
} codex mcp add raintree-technology-hig-doctor -- npx -y hig-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"raintree-technology-hig-doctor": {
"type": "local",
"command": [
"npx",
"-y",
"hig-mcp"
],
"enabled": true
}
}
} openclaw mcp add raintree-technology-hig-doctor --command npx --arg -y --arg hig-mcp
mcp_servers:
raintree-technology-hig-doctor:
command: "npx"
args: ["-y", "hig-mcp"] {
"McpServers": {
"raintree-technology-hig-doctor": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"hig-mcp"
]
}
}
} assistant mcp add raintree-technology-hig-doctor -t stdio -c npx -a -y hig-mcp
{
"mcpServers": {
"raintree-technology-hig-doctor": {
"command": "npx",
"args": [
"-y",
"hig-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Sept 26 0
- Package version: 0.2.1 → 0.2.3 functional
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 16 Sept 26 −3
- Stability: pass → 0.80 functional
- 15 Sept 26 +1
- Stability: 0.97 → pass security
- 13 Sept 26 +1
- Package version: 0.2.1 → 0.2.3 functional
- 11 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 9 Sept 26 −3
- Stability: pass → 0.80 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Analysed npm/hig-mcp@0.2.3
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | raintree-technology/hig-doctor |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/raintree-technology/hig-doctor/.github/workflows/publish-hig-mcp.yml@refs/tags/hig-mcp-v0.2.3 |
| Rekor log index | 2715915766 |
| Predicate type | https://slsa.dev/provenance/v1 |
| Subject digest | sha512:baf9dddc0239a963c3cfb2383a7a7a81e9243b1d3547171d133a55aeb2c866ee67c09d23f81dc94982b0e002441986128710fd42eeecc6e5e872cf6a1 |
Background: How many MCP packages publish verified provenance →
Dependencies 1 package
| Packages resolved | 1 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
hig_audit ~165
Run a HIG compliance audit on a project directory. Scans source files across SwiftUI, UIKit, React, Vue, Svelte, Angular, Compose, Android XML, React Native, Flutter, CSS, and HTML. Returns severity counts (critical/serious/moderate), per-category breakdown, and a markdown report with code excerpts and HIG reference material. Honors hig-doctor.config.json, .hig-baseline.json, and inline hig-disable suppressions in the audited project.
| Name | Type | Req | Description |
|---|---|---|---|
| directory | string | yes | Absolute path to the project directory to audit. Must be a directory the server process can read. |
| fail_on | string | – | Optional severity threshold. If set, the response includes gate_tripped=true when any concern at/above this severity is found. |
No output schema declared.
No examples provided.
hig_audit_file ~95
Audit a single source file for HIG compliance — the fast inner loop after writing or editing a file. Returns every finding with its rule ID, severity, line, fix guidance, and HIG citation. Use hig_explain_finding for deeper guidance on a specific rule.
| Name | Type | Req | Description |
|---|---|---|---|
| fail_on | string | – | Optional severity threshold for gate_tripped. |
| file | string | yes | Absolute path to the source file to audit. |
No output schema declared.
No examples provided.
hig_explain_finding ~92
Explain an audit finding: full rule metadata (severity, engine, fix guidance) plus an excerpt of the Apple HIG reference the rule cites. Pass the ruleId from hig_audit / hig_audit_file results (e.g. 'swift/hardcoded-color').
| Name | Type | Req | Description |
|---|---|---|---|
| rule_id | string | yes | Stable rule ID, e.g. 'swift/hardcoded-color', 'web/missing-alt'. |
No output schema declared.
No examples provided.
hig_list_skills ~39
List all available Apple HIG skills with descriptions and reference topics. Use this first to discover what HIG guidance is available before calling hig_lookup.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
hig_lookup ~166
Fetch Apple HIG reference markdown. Provide a skill name (e.g. 'hig-foundations') to get the skill overview, or a skill+topic (e.g. skill='hig-foundations', topic='color') to get detailed reference for that topic. Content is from Apple's HIG, snapshot dated 2025-02-02. If you don't know which skill/topic to use, call hig_search instead.
| Name | Type | Req | Description |
|---|---|---|---|
| skill | string | yes | Skill identifier, e.g. 'hig-foundations', 'hig-components-layout', 'hig-platforms'. |
| topic | string | – | Optional topic within the skill, e.g. 'color', 'typography', 'accessibility', 'sidebars'. Call hig_list_skills first to see valid topics. |
No output schema declared.
No examples provided.
hig_search ~96
Full-text search (BM25) across all Apple HIG reference topics. Ask in natural language — e.g. 'minimum touch target size', 'when to use a sheet vs a popover' — and get ranked topics with snippets. Follow up with hig_lookup using the returned skill/topic.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | number | – | Max results (default 8, cap 25). |
| query | string | yes | Natural-language or keyword query. |
No output schema declared.
No examples provided.
What is the HIG Doctor MCP server?
HIG Doctor is an MCP server listed in the public MCP registry as io.github.raintree-technology/hig-doctor. Apple Human Interface Guidelines search, lookup, and project audits for AI coding agents. This page covers its npm package (hig-mcp).
Is the HIG Doctor MCP server safe to use?
HIG Doctor scores 96 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the HIG Doctor MCP server expose?
HIG Doctor exposes 6 tools: hig_list_skills, hig_lookup, hig_search, hig_audit, hig_audit_file, hig_explain_finding. Their descriptions and schemas cost roughly 653 tokens of context every time the server is loaded.
Is the HIG Doctor MCP server still maintained?
HIG Doctor is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the HIG Doctor MCP server under?
HIG Doctor declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.