infrastructure tier

`infrastructure-web-ada-compliance`

WCAG/ADA accessibility compliance checker implementing foundation-web-analysis::Analyzer -- image alt text, heading hierarchy, ARIA landmarks, form labels, link text, page language, and table/media caption checks against a fetched page's DOM

WCAG/ADA accessibility compliance checker implementing foundation-web-analysis::Analyzer -- image alt text, heading hierarchy, ARIA landmarks, form labels, link text, page language, and table/media caption checks against a fetched page's DOM

Tier	infrastructure
Role	unclassified (baselined)
Path	`crates/infrastructure/web-ada-compliance`
Edition	2021
Targets	infrastructure_web_ada_compliance
Public items	26 across 2 modules
Tests	45

What it is for

# infrastructure-web-ada-compliance

WCAG/ADA accessibility compliance checker implementing foundation_web_analysis::Analyzer. Statically inspects a fetched page's DOM for image alt text, heading hierarchy, ARIA landmarks/labels, form-field labeling, link text quality, page-language declaration, and table/media caption presence. Color contrast and keyboard navigation cannot be determined without a browser and are always flagged for manual review via ManualReviewItem.

Lifted from plumber/src/analyzers/ada_checker.rs and plumber/src/models/ada_compliance.rs (sprint 3.46, wave 2 — see CHANGELOG.md for provenance).

Capabilities

`checker (other)`

ADA/WCAG accessibility checker.

Item
`pub const DEFAULT_MAX_BYTES: usize`

`AdaChecker`

ADA/WCAG accessibility checker.

Item
`pub struct AdaChecker`
`AdaChecker :: fn new() -> std::result::Result <Self, infrastructure_fetcher::SafeHttpError>`
`AdaChecker :: fn with_max_bytes(mut self, max_bytes : usize) -> Self`
`AdaChecker :: fn default() -> Self`
`AdaChecker :: fn name(& self) -> & 'static str`
`AdaChecker :: async fn analyze(& self, organization_id : Uuid, website_url : & str) -> Result <AnalysisResult>`
`AdaChecker :: fn requires_link_graph(& self) -> bool`
`AdaChecker :: fn cache_ttl_days(& self) -> u32`

`AdaCompliance`

WCAG/ADA accessibility compliance data model.

Item
`pub struct AdaCompliance`
`AdaCompliance :: fn default() -> Self`
`AdaCompliance :: fn new(organization_id : Uuid, url : & str) -> Self`
`AdaCompliance :: fn alt_text_percentage(& self) -> f32`
`AdaCompliance :: fn form_label_percentage(& self) -> f32`
`AdaCompliance :: fn violations_by_impact(& self, impact : ViolationImpact) -> usize`
`AdaCompliance :: fn max_impact(& self) -> Option <ViolationImpact>`
`AdaCompliance :: fn passes_basic_checks(& self) -> bool`
`AdaCompliance :: fn wcag_compliance_level(& self) -> WcagLevel`

`AdaViolation`

WCAG/ADA accessibility compliance data model.

Item
`pub struct AdaViolation`

`AdaWarning`

WCAG/ADA accessibility compliance data model.

Item
`pub struct AdaWarning`

`AltTextQuality`

WCAG/ADA accessibility compliance data model.

Item
`pub enum AltTextQuality`

`HeadingLevel`

WCAG/ADA accessibility compliance data model.

Item
`pub struct HeadingLevel`

`ViolationImpact`

WCAG/ADA accessibility compliance data model.

Item
`pub enum ViolationImpact`
`ViolationImpact :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`

`WcagLevel`

WCAG/ADA accessibility compliance data model.

Item
`pub enum WcagLevel`
`WcagLevel :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`

How to use it

No examples/ target and no doctest in this crate's rustdoc. The tests listed under Verification are the closest executable usage.

Module structure

infrastructure_web_ada_compliance

checker
models

flowchart TD
  n_infrastructure_web_ada_compliance["infrastructure_web_ada_compliance"]
  n_infrastructure_web_ada_compliance --> n_checker["checker"]
  n_infrastructure_web_ada_compliance --> n_models["models"]

Public surface

`checker`

Item	What it is
`pub const DEFAULT_MAX_BYTES: usize`	Response body byte cap for a fetched page (Gate 1.5.6 input limit).
`pub struct AdaChecker`	Analyzer for ADA/WCAG accessibility compliance
`AdaChecker :: fn new() -> std::result::Result <Self, infrastructure_fetcher::SafeHttpError>`	Build a checker with the default byte cap (`DEFAULT_MAX_BYTES`) and timeout (`infrastructure_fetcher::safe_http::DEFAULT_TIMEOUT`, 30s).
`AdaChecker :: fn with_max_bytes(mut self, max_bytes : usize) -> Self`	Override the response body byte cap.
`AdaChecker :: fn default() -> Self`	# Panics Panics if the underlying `SafeHttpClient` cannot be built (TLS backend init failure) -- matches the source's `expect`-on-construction posture (`Client::builder()...expect("Failed to build HTTP client")`).
`AdaChecker :: fn name(& self) -> & 'static str`	—
`AdaChecker :: async fn analyze(& self, organization_id : Uuid, website_url : & str) -> Result <AnalysisResult>`	—
`AdaChecker :: fn requires_link_graph(& self) -> bool`	—
`AdaChecker :: fn cache_ttl_days(& self) -> u32`	—

`models`

Item	What it is
`pub struct AdaCompliance`	ADA/WCAG accessibility compliance analysis for one page.
`pub struct HeadingLevel`	—
`pub enum AltTextQuality`	—
`pub struct AdaViolation`	—
`pub enum ViolationImpact`	—
`ViolationImpact :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—
`pub struct AdaWarning`	—
`AdaCompliance :: fn default() -> Self`	—
`AdaCompliance :: fn new(organization_id : Uuid, url : & str) -> Self`	—
`AdaCompliance :: fn alt_text_percentage(& self) -> f32`	Percentage of images carrying a (non-empty) alt attribute
`AdaCompliance :: fn form_label_percentage(& self) -> f32`	Percentage of form fields carrying either a `<label>` or an `aria-label`/`aria-labelledby`
`AdaCompliance :: fn violations_by_impact(& self, impact : ViolationImpact) -> usize`	—
`AdaCompliance :: fn max_impact(& self) -> Option <ViolationImpact>`	—
`AdaCompliance :: fn passes_basic_checks(& self) -> bool`	Coarse pass/fail gate independent of the WCAG-criteria-mapped scores: page language declared, exactly one h1, no skipped heading levels, 90%+ alt-text coverage, 100% form-label coverage, no empty links.
`AdaCompliance :: fn wcag_compliance_level(& self) -> WcagLevel`	Coarse WCAG level estimate from violation severity -- NOT a substitute for a manual audit (contrast and keyboard-navigation criteria are flagged `requires_*_review`, never auto-decided).
`pub enum WcagLevel`	—
`WcagLevel :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—

Re-exports. Exported here, defined elsewhere.

Export	Defined in
`{AdaChecker,DEFAULT_MAX_BYTES}`	`checker::{AdaChecker,DEFAULT_MAX_BYTES}`
`{AdaCompliance,AdaViolation,AdaWarning,AltTextQuality,HeadingLevel,ViolationImpact,WcagLevel,}`	`models::{AdaCompliance,AdaViolation,AdaWarning,AltTextQuality,HeadingLevel,ViolationImpact,WcagLevel,}`

Boundary

Reaches into foundation.

Shares tier infrastructure with 82 other crates: infrastructure-acquire, infrastructure-adapters-google-calendar, infrastructure-adapters-google-gmail, infrastructure-adapters-google-places, infrastructure-adapters-google-trends, infrastructure-adapters-shodan, infrastructure-adapters-yelp, infrastructure-agent, … (82 total).

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier (ontology)	`infrastructure`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/infrastructure/web-ada-compliance`
Vocabulary in force (lexicon)	`current`

Tier flow. Which tiers this crate's own edges cross.

flowchart LR
  n_infrastructure["infrastructure"] --> n_foundation["foundation"]

Dependencies

Runtime, in this workspace.

Crate	Tier	Optional	Only on
`foundation-web-analysis`	foundation	no	always
`infrastructure-fetcher`	infrastructure	no	always

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`async-trait`	`^0.1`	—	no	always
`chrono`	`^0.4`	`serde`	no	always
`scraper`	`^0.20`	—	no	always
`serde`	`^1`	`derive`	no	always
`serde_json`	`^1`	—	no	always
`thiserror`	`^2`	—	no	always
`url`	`^2`	—	no	always
`uuid`	`^1`	`v4`, `v7`, `serde`, `js`	no	always

Development, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`tokio`	`^1`	`full`, `full`, `test-util`	no	always
`tokio-test`	`^0.4`	—	no	always

Build. None.

Depended on by. Nothing in this workspace.

Signal flow — what reaches this crate, and what it reaches.

flowchart LR
  SELF["infrastructure-web-ada-compliance"]
  SELF -->|runtime| n_foundation_web_analysis["foundation-web-analysis"]
  SELF -->|runtime| n_infrastructure_fetcher["infrastructure-fetcher"]
  classDef self fill:#1f883d,stroke:#1f883d,color:#fff;
  class SELF self;

Feature flags

No Cargo features are defined: every capability is unconditional, so no consumer can receive a half-wired crate.

Targets

Kind	Name	Source
lib	`infrastructure_web_ada_compliance`	`src/lib.rs`

Error model

No public error type was detected: no public item declares a type named *Error, and no public signature returns one.

Operational characteristics

Property	Evidence
async public surface	yes
async runtime	none detected
database access	none detected
network I/O	none detected
unsafe code	none detected
environment variables	none detected

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

No environment variable is read with a literal name anywhere in this crate. A variable whose key is computed at run time cannot be listed here, and is not claimed to be absent.

No workspace crate depends on this one.

Verification

Kind	Count
Unit tests	45
Integration tests	0
Examples	0
Doctests	0

Evidence by module. How often each public module is named by something executable.

Module	Tests	Examples	Consumers
`checker`	2	0	0
`models`	7	0	0

What the tests establish, by name:

ambiguous_link_text_is_a_warning — src/checker.rs
analyze_always_flags_contrast_and_keyboard_for_manual_review — src/checker.rs
aria_landmarks_and_main_nav_detected — src/checker.rs
cache_ttl_is_seven_days — src/checker.rs
decorative_image_missing_alt_is_not_a_violation — src/checker.rs
descriptive_alt_text_is_good_quality — src/checker.rs
empty_alt_is_recorded_but_not_missing — src/checker.rs
empty_link_with_no_text_or_aria_or_img_alt_is_a_violation — src/checker.rs
filename_style_alt_text_is_poor_quality — src/checker.rs
form_field_with_aria_label_counts_as_aria_not_missing — src/checker.rs
form_field_with_matching_label_is_labeled — src/checker.rs
form_field_with_no_label_or_aria_is_missing_and_a_violation — src/checker.rs
hidden_and_submit_and_button_inputs_are_excluded_from_form_checks — src/checker.rs
image_missing_alt_is_a_critical_violation — src/checker.rs
lang_attribute_present_is_recorded — src/checker.rs
link_with_only_an_alt_bearing_image_is_not_empty — src/checker.rs
missing_h1_is_a_moderate_violation — src/checker.rs
missing_lang_attribute_is_a_serious_violation — src/checker.rs
multiple_h1_is_a_warning_not_a_violation — src/checker.rs
name_is_ada_checker — src/checker.rs
requires_link_graph_is_false — src/checker.rs
scores_are_100_on_a_clean_page — src/checker.rs
scores_drop_when_perceivable_violations_present — src/checker.rs
skip_link_detected — src/checker.rs
skipped_heading_level_is_flagged — src/checker.rs
table_with_headers_and_caption_counted — src/checker.rs
video_with_caption_track_is_counted_as_captioned — src/checker.rs
video_without_captions_is_counted_but_not_captioned — src/checker.rs
well_formed_heading_hierarchy_is_valid — src/checker.rs
ada_compliance_serialization_round_trips — src/models.rs
_… 15 more_

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	10	26
Public modules with a `//!` block	2	2

pie showData
    title Public items with rustdoc
    "Documented" : 10
    "No rustdoc detected" : 16

Metrics

Metric	Value
Rust source files	3
Source lines	1416
Code lines	1168
Public API items	26
Public modules	2
Tests	45
Examples	0
Cargo features	0
Direct runtime dependencies	10
Workspace reverse dependencies	0

pie showData
    title Public API by kind
    "constant" : 1
    "enum" : 3
    "method" : 17
    "struct" : 5

pie showData
    title Rust source composition
    "Code" : 1168
    "Blank or comment" : 248

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.

All infrastructure · Manual