Skip to content

Index

svelte

Svelte-specific rule delta (sits on top of the shared node base layer).

A Svelte project runs every node rule (via resolve_frameworks) PLUS the rules here. The svelte delta is small by design: the research shows Svelte puts its UI concerns in the compiler (a11y warnings, type-checking .svelte) rather than in ESLint plugins, so the delta is essentially one extra CLI — svelte-check — that tsc alone cannot replace.

Importing this package fires the @register_rule decorators (side effect).

SvelteCheckRule

Bases: NodeToolRule

Run svelte-check and score by its error count.

Scoring: 100 - errors * 5 (same per-error weight as the type rule). Contributes to the type category for Svelte projects on top of tsc.

Source code in packages/axm-audit/src/axm_audit/core/rules/svelte/svelte_check.py
Python
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
@register_rule("type", framework=Framework.SVELTE)
class SvelteCheckRule(NodeToolRule):
    """Run ``svelte-check`` and score by its error count.

    Scoring: ``100 - errors * 5`` (same per-error weight as the type rule).
    Contributes to the ``type`` category for Svelte projects on top of ``tsc``.
    """

    binary = "svelte-check"
    install_hint = "Install svelte-check: npm install -D svelte-check"

    @property
    def rule_id(self) -> str:
        """Unique identifier for this rule."""
        return "SVELTE_CHECK"

    @property
    def args(self) -> list[str]:
        """Machine-readable output, errors-only threshold."""
        return ["--output", "machine", "--threshold", "error"]

    @property
    def findings_returncodes(self) -> frozenset[int]:
        """svelte-check exits 1 when it found errors — a finding, not a crash."""
        return frozenset({1})

    def parse(self, result: subprocess.CompletedProcess[str]) -> object:
        """svelte-check emits text rows, not JSON — return raw stdout."""
        return result.stdout

    def score_output(self, parsed: object, project_path: Path) -> CheckResult:
        """Score by the count of svelte-check ERROR diagnostics."""
        output = parsed if isinstance(parsed, str) else ""
        error_count = _count_errors(output)
        score = max(0, 100 - error_count * 5)
        passed = score >= PASS_THRESHOLD
        return CheckResult(
            rule_id=self.rule_id,
            passed=passed,
            message=f"svelte-check: {score}/100 ({error_count} errors)",
            severity=Severity.WARNING if not passed else Severity.INFO,
            score=score,
            details={"error_count": error_count},
            fix_hint="Fix the svelte-check errors above" if error_count else None,
        )
args property

Machine-readable output, errors-only threshold.

findings_returncodes property

svelte-check exits 1 when it found errors — a finding, not a crash.

rule_id property

Unique identifier for this rule.

parse(result)

svelte-check emits text rows, not JSON — return raw stdout.

Source code in packages/axm-audit/src/axm_audit/core/rules/svelte/svelte_check.py
Python
68
69
70
def parse(self, result: subprocess.CompletedProcess[str]) -> object:
    """svelte-check emits text rows, not JSON — return raw stdout."""
    return result.stdout
score_output(parsed, project_path)

Score by the count of svelte-check ERROR diagnostics.

Source code in packages/axm-audit/src/axm_audit/core/rules/svelte/svelte_check.py
Python
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
def score_output(self, parsed: object, project_path: Path) -> CheckResult:
    """Score by the count of svelte-check ERROR diagnostics."""
    output = parsed if isinstance(parsed, str) else ""
    error_count = _count_errors(output)
    score = max(0, 100 - error_count * 5)
    passed = score >= PASS_THRESHOLD
    return CheckResult(
        rule_id=self.rule_id,
        passed=passed,
        message=f"svelte-check: {score}/100 ({error_count} errors)",
        severity=Severity.WARNING if not passed else Severity.INFO,
        score=score,
        details={"error_count": error_count},
        fix_hint="Fix the svelte-check errors above" if error_count else None,
    )