Files
amare/.github/skills/impeccable/scripts/live/svelte-component.mjs
2026-08-01 22:06:48 -03:00

1343 lines
50 KiB
JavaScript

/**
* Svelte live-mode component injection helpers.
*
* Variants are real .svelte components under node_modules/.impeccable-live/<session-id>/.
* The browser mounts them via Svelte 5 mount(); accept inlines the chosen
* variant back into the route source with props mapped to original bindings.
*/
import fs from 'node:fs';
import path from 'node:path';
import os from 'node:os';
import { createHash } from 'node:crypto';
import {
analyzeSvelteMarkup,
buildPropsScriptV2,
loadSvelteCompiler,
restoreSvelteMarkup,
} from './svelte-ast.mjs';
import {
bakeParamValues,
collectAllSelectors,
collectUnusedSelectors,
normalizeSelector,
parseStylesheet,
pruneUnusedSelectors,
reconcileCss,
serializeNodes,
splitSelectorList,
} from './accept-css.mjs';
import { verifyAcceptedSource } from './accept-verify.mjs';
// Preview modules stay under node_modules on purpose: SvelteKit restricts
// vite's server.fs.allow to src/lib, src/routes, .svelte-kit, and
// node_modules, so an .impeccable/ tree under the app root 403s (verified
// against a real SvelteKit dev server). Staleness from node_modules being
// unwatched is solved by REVISIONED module paths instead: every publish
// snapshots the variant files into a fresh r<N>/ directory and the browser
// imports from there, so a republished fix can never be pinned by a
// transform cache keyed on the old path.
export const SVELTE_COMPONENT_ROOT = 'node_modules/.impeccable-live';
// A short-lived interim location; swept so no project keeps a stray tree.
export const LEGACY_SVELTE_COMPONENT_ROOT = '.impeccable/live/previews';
export const SVELTE_RUNTIME_FILE = `${SVELTE_COMPONENT_ROOT}/__runtime.js`;
export const SVELTE_PROBE_FILE = `${SVELTE_COMPONENT_ROOT}/__probe.js`;
export const DEFERRED_ACCEPTS_FILE = '.impeccable/live/deferred-svelte-component-accepts.json';
const MUSTACHE_RE = /\{([^{}]+)\}/g;
export function shouldUseSvelteComponentInjection(filePath) {
if (/^(0|false|no)$/i.test(process.env.IMPECCABLE_LIVE_SVELTE_COMPONENT || '')) return false;
return path.extname(filePath).toLowerCase() === '.svelte';
}
export function componentSessionDir(id, cwd = process.cwd()) {
return path.join(cwd, SVELTE_COMPONENT_ROOT, id);
}
export function manifestPathForSession(id, cwd = process.cwd()) {
return path.join(componentSessionDir(id, cwd), 'manifest.json');
}
export function ensureRuntimeHelper(cwd = process.cwd()) {
const file = path.join(cwd, SVELTE_RUNTIME_FILE);
fs.mkdirSync(path.dirname(file), { recursive: true });
if (!fs.existsSync(file)) {
fs.writeFileSync(file, `export { mount, unmount } from 'svelte';\n`, 'utf-8');
}
// Attach-time probe: the browser imports this through the dev server before
// the first mount. A 404 here means the resolved app root and the dev
// server's root disagree, and the session fails with a named error instead
// of a silent fall-back to the picker at first variant.
const probe = path.join(cwd, SVELTE_PROBE_FILE);
if (!fs.existsSync(probe)) {
fs.writeFileSync(probe, `export const impeccableLivePreviewProbe = true;\n`, 'utf-8');
}
return file;
}
/**
* Extract ordered unique mustache expressions from markup (not inside <!-- -->).
*/
export function extractMustacheExpressions(text) {
const expressions = [];
const seen = new Set();
const lines = String(text || '').split('\n');
for (const line of lines) {
const trimmed = line.trim();
if (trimmed.startsWith('<!--')) continue;
let match;
MUSTACHE_RE.lastIndex = 0;
while ((match = MUSTACHE_RE.exec(line)) !== null) {
const expr = match[1].trim();
if (!expr || seen.has(expr)) continue;
seen.add(expr);
expressions.push(expr);
}
}
return expressions;
}
export function buildPropContract(expressions) {
return expressions.map((expr, index) => {
const derived = derivePropName(expr, index);
return {
prop: derived,
expr,
placeholder: `{${expr}}`,
};
});
}
function derivePropName(expr, index) {
const tail = expr.match(/(?:\.|\[)(\w+)\s*\]?$/);
if (tail && tail[1] && /^[A-Za-z_$][\w$]*$/.test(tail[1])) {
return tail[1];
}
return `prop${index}`;
}
export function substituteExprsWithProps(markup, contract) {
let out = String(markup || '');
for (const entry of contract) {
out = out.split(entry.placeholder).join(`{${entry.prop}}`);
}
return out;
}
export function substitutePropsWithExprs(markup, contract) {
let out = String(markup || '');
for (const entry of contract) {
out = out.split(`{${entry.prop}}`).join(`{${entry.expr}}`);
}
return out;
}
export function parseSvelteComponentFile(content) {
const text = String(content || '');
const scriptMatch = text.match(/^([\s\S]*?)<script\b[^>]*>[\s\S]*?<\/script>/i);
const withoutScript = scriptMatch ? text.slice(scriptMatch[0].length) : text;
const styleMatch = withoutScript.match(/<style\b[^>]*>[\s\S]*?<\/style\s*>/i);
const styleBlock = styleMatch ? styleMatch[0] : '';
const markup = styleMatch
? withoutScript.slice(0, styleMatch.index).trim()
: withoutScript.trim();
const cssLines = styleBlock
? styleBlock
.replace(/^<style\b[^>]*>/i, '')
.replace(/<\/style\s*>$/i, '')
.split('\n')
.map((line) => line.trimEnd())
: [];
while (cssLines.length > 0 && cssLines[0].trim() === '') cssLines.shift();
while (cssLines.length > 0 && cssLines[cssLines.length - 1].trim() === '') cssLines.pop();
return { markup, cssLines, styleBlock };
}
function buildPropsScript(contract) {
if (contract.length === 0) {
return '<script>\n /** @type {Record<string, never>} */\n let {} = $props();\n</script>\n';
}
const names = contract.map((c) => c.prop).join(', ');
const typeFields = contract.map((c) => ` ${c.prop}: string;`).join('\n');
return `<script>\n /** @type {{\n${typeFields}\n }} */\n let { ${names} } = $props();\n</script>\n`;
}
function buildVariantStub(variantNum, originalWithProps, contract) {
const propsComment = contract.length > 0
? `\n<!-- Props: ${contract.map((c) => `${c.prop} <- {${c.expr}}`).join(', ')} -->\n`
: '';
return `${buildPropsScript(contract)}${propsComment}${originalWithProps.trim()}\n\n<style>\n /* Variant ${variantNum}: add scoped CSS here */\n</style>\n`;
}
function buildInsertVariantStub(variantNum) {
return `${buildPropsScript([])}<div class="impeccable-insert-preview">Insert variant ${variantNum}</div>\n\n<style>\n .impeccable-insert-preview { display: block; }\n</style>\n`;
}
/**
* Scaffold a component-preview session. The scaffold is AST-based: the app's
* own svelte compiler parses the selected markup, control-flow blocks are
* preserved (an each collection crosses the prop contract as ONE structured
* prop, its loop body verbatim), and constructs a detached preview cannot
* support return `{ fallback: 'source-preview', reason }` so the caller keeps
* the markup inside the route file instead of shipping a wrong preview.
*/
export function scaffoldSvelteComponentSession({
id,
count,
sourceFile,
sourceStartLine,
sourceEndLine,
originalLines,
cwd = process.cwd(),
}) {
const originalMarkup = originalLines.join('\n');
const compiler = loadSvelteCompiler(cwd);
if (!compiler) {
return { fallback: 'source-preview', reason: 'svelte 5 compiler not resolvable from the app root' };
}
const analysis = analyzeSvelteMarkup(originalMarkup, compiler.parse);
if (!analysis.ok) {
return { fallback: 'source-preview', reason: analysis.reason };
}
ensureRuntimeHelper(cwd);
const dir = componentSessionDir(id, cwd);
fs.mkdirSync(dir, { recursive: true });
const contract = analysis.contract;
const seeded = extractMatchingSourceCss(
safeReadSource(path.resolve(cwd, sourceFile)),
originalMarkup,
);
const seededCss = seeded.css;
// The preview compiles in isolation, so NONE of these source rules applied
// to what the user approved. Accept enforces that preview truth: any of
// them the variant does not re-declare is superseded and removed, instead
// of re-attaching to the accepted markup through kept class names (the
// ".decisions grid grabs the new board" failure). Only the CLASS-matched
// selectors are candidates; tag rules style shared route elements.
const seededSelectors = [...seeded.supersedable];
const manifest = {
id,
previewMode: 'svelte-component',
contractVersion: 2,
sourceFile: sourceFile.split(path.sep).join('/'),
sourceStartLine,
sourceEndLine,
count,
propContract: contract,
originalMarkup,
seededSelectors,
componentDir: path.relative(cwd, dir).split(path.sep).join('/'),
// Absolute paths let the browser fall back to /@fs/ imports when the dev
// server's base or root makes root-relative URLs miss, and probe whether
// the preview tree is reachable at all before blaming a variant.
componentDirAbs: dir.split(path.sep).join('/'),
runtimeModule: `/${SVELTE_RUNTIME_FILE}`,
runtimeModuleAbs: path.join(cwd, SVELTE_RUNTIME_FILE).split(path.sep).join('/'),
probeModule: `/${SVELTE_PROBE_FILE}`,
probeModuleAbs: path.join(cwd, SVELTE_PROBE_FILE).split(path.sep).join('/'),
};
fs.writeFileSync(path.join(dir, 'manifest.json'), JSON.stringify(manifest, null, 2) + '\n', 'utf-8');
for (let n = 1; n <= count; n++) {
const variantFile = path.join(dir, `v${n}.svelte`);
if (!fs.existsSync(variantFile)) {
fs.writeFileSync(variantFile, buildVariantStubV2(n, analysis.markupWithProps, contract, seededCss), 'utf-8');
}
}
return {
manifest,
manifestFile: path.relative(cwd, path.join(dir, 'manifest.json')).split(path.sep).join('/'),
componentDir: manifest.componentDir,
propContract: contract,
// Inlined so the generate event's scaffold payload carries the stub
// shape; the agent edits vN.svelte in place instead of spending reads on
// the manifest and stub files (or deleting and recreating them).
stubMarkup: analysis.markupWithProps,
seededCss,
};
}
function safeReadSource(filePath) {
try { return fs.readFileSync(filePath, 'utf-8'); } catch { return ''; }
}
function escapeSelectorToken(token) {
return String(token).replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
/**
* Seed variant stubs with the source component's rules that already style the
* selected markup, so variants start from the real cascade (a detached
* preview inherits none of the route's compile-scoped CSS) instead of
* reimplementing it blind.
*
* Returns { css, supersedable }. `css` is every matching rule (class OR tag
* matched). `supersedable` holds only the CLASS-matched selectors: those are
* the accept-time removal candidates. Tag selectors (h1, a, p) style shared
* elements across the whole route, so they seed the preview but are never
* candidates for removal.
*/
export function extractMatchingSourceCss(routeSource, originalMarkup) {
const empty = { css: '', supersedable: new Set() };
const styleMatch = String(routeSource || '').match(/<style\b[^>]*>([\s\S]*?)<\/style\s*>/i);
if (!styleMatch) return empty;
const classNames = new Set();
const classRe = /class\s*=\s*(["'])(.*?)\1/g;
let m;
while ((m = classRe.exec(originalMarkup))) {
for (const cls of m[2].split(/\s+/)) if (cls && !cls.includes('{')) classNames.add(cls);
}
const tagRe = /<([a-z][a-z0-9-]*)/gi;
const tags = new Set();
while ((m = tagRe.exec(originalMarkup))) tags.add(m[1].toLowerCase());
if (classNames.size === 0 && tags.size === 0) return empty;
// Token-boundary matching, never substring: `.btn` must not match
// `.btn-primary`, and `.stage` must not match `.stages`. A substring hit
// seeds a rule that never styled the pick, and a falsely seeded selector
// becomes an accept-time DELETION of a hand-written rule.
const classRes = [...classNames].map((cls) => new RegExp('\\.' + escapeSelectorToken(cls) + '(?![A-Za-z0-9_-])'));
const tagRes = [...tags].map((tag) => new RegExp('(^|[\\s>+~,(])' + escapeSelectorToken(tag) + '(?![A-Za-z0-9_-])', 'i'));
const classMatches = (selector) => classRes.some((re) => re.test(selector));
const tagMatches = (selector) => tagRes.some((re) => re.test(selector));
const supersedable = new Set();
const ruleMatches = (prelude) => {
let matched = false;
for (const selector of splitSelectorList(prelude)) {
if (classMatches(selector)) {
matched = true;
supersedable.add(normalizeSelector(selector));
} else if (tagMatches(selector)) {
matched = true;
}
}
return matched;
};
const pick = (nodes) => {
const kept = [];
for (const node of nodes) {
if (node.type === 'rule' && ruleMatches(node.prelude)) kept.push(node);
else if (node.type === 'at' && node.children) {
const children = pick(node.children);
if (children.length) kept.push({ ...node, children });
}
}
return kept;
};
return { css: serializeNodes(pick(parseStylesheet(styleMatch[1]))), supersedable };
}
function buildVariantStubV2(variantNum, markupWithProps, contract, seededCss) {
const propsComment = contract.length > 0
? `\n<!-- Props: ${contract.map((c) => `${c.prop} (${c.kind}) <- {${c.expr}}`).join(', ')} -->\n`
: '';
// The guard comments must never contain the literal "<style" character
// sequence: agents (and the fake test agent) locate the style block with
// string searches, and a mention inside a comment truncates their surgery
// mid-comment.
const css = seededCss
? `\n<style>\n /* Variant ${variantNum}: seeded from the route's current rules; restyle or delete freely.\n ALL rules go inside THIS block. Svelte allows exactly one top-level style\n element per component; appending a second one is a compile error. */\n${seededCss.split('\n').map((l) => (l.trim() ? ' ' + l : '')).join('\n')}\n</style>\n`
: `\n<style>\n /* Variant ${variantNum}: add all CSS inside THIS block. Svelte allows exactly\n one top-level style element; a second one is a compile error. */\n</style>\n`;
return `${buildPropsScriptV2(contract)}${propsComment}${markupWithProps.trim()}\n${css}`;
}
export function scaffoldSvelteComponentInsertSession({
id,
count,
sourceFile,
insertLine,
position,
anchorStartLine,
anchorEndLine,
anchorLines,
cwd = process.cwd(),
}) {
ensureRuntimeHelper(cwd);
const dir = componentSessionDir(id, cwd);
fs.mkdirSync(dir, { recursive: true });
const anchorMarkup = (anchorLines || []).join('\n');
const manifest = {
id,
mode: 'insert',
previewMode: 'svelte-component',
sourceFile: sourceFile.split(path.sep).join('/'),
insertLine,
position,
anchorStartLine,
anchorEndLine,
originalMarkup: anchorMarkup,
anchorMarkup,
count,
propContract: [],
componentDir: path.relative(cwd, dir).split(path.sep).join('/'),
componentDirAbs: dir.split(path.sep).join('/'),
runtimeModule: `/${SVELTE_RUNTIME_FILE}`,
runtimeModuleAbs: path.join(cwd, SVELTE_RUNTIME_FILE).split(path.sep).join('/'),
probeModule: `/${SVELTE_PROBE_FILE}`,
probeModuleAbs: path.join(cwd, SVELTE_PROBE_FILE).split(path.sep).join('/'),
};
fs.writeFileSync(path.join(dir, 'manifest.json'), JSON.stringify(manifest, null, 2) + '\n', 'utf-8');
for (let n = 1; n <= count; n++) {
const variantFile = path.join(dir, `v${n}.svelte`);
if (!fs.existsSync(variantFile)) {
fs.writeFileSync(variantFile, buildInsertVariantStub(n), 'utf-8');
}
}
return {
manifest,
manifestFile: path.relative(cwd, path.join(dir, 'manifest.json')).split(path.sep).join('/'),
componentDir: manifest.componentDir,
propContract: [],
};
}
export function findSvelteComponentManifest(id, cwd = process.cwd()) {
const direct = manifestPathForSession(id, cwd);
if (fs.existsSync(direct)) {
return readManifest(direct);
}
// Legacy location: a session scaffolded by an older version can still be
// accepted after an upgrade.
const legacyDirect = path.join(cwd, LEGACY_SVELTE_COMPONENT_ROOT, id, 'manifest.json');
if (fs.existsSync(legacyDirect)) {
return readManifest(legacyDirect);
}
for (const rootRel of [SVELTE_COMPONENT_ROOT, LEGACY_SVELTE_COMPONENT_ROOT]) {
const root = path.join(cwd, rootRel);
if (!fs.existsSync(root)) continue;
for (const entry of fs.readdirSync(root, { withFileTypes: true })) {
if (!entry.isDirectory()) continue;
const candidate = path.join(root, entry.name, 'manifest.json');
if (!fs.existsSync(candidate)) continue;
try {
const manifest = readManifest(candidate);
if (manifest?.id === id) return { ...manifest, manifestPath: candidate };
} catch { /* skip */ }
}
}
return null;
}
export function readManifest(manifestPath) {
const data = JSON.parse(fs.readFileSync(manifestPath, 'utf-8'));
return {
...data,
manifestPath,
};
}
export function resolveSourceFile(sourceFile, cwd = process.cwd()) {
if (!sourceFile || path.isAbsolute(sourceFile)) {
throw new Error('Invalid svelte-component source file');
}
const full = path.resolve(cwd, sourceFile);
const rel = path.relative(cwd, full);
if (!rel || rel.startsWith('..') || path.isAbsolute(rel)) {
throw new Error('Svelte-component source file escapes project root');
}
if (!fs.existsSync(full)) {
throw new Error('Svelte-component source file not found: ' + sourceFile);
}
return full;
}
function appendCssToSvelteStyle(lines, cssLines) {
const closeIdx = findLastStyleCloseLine(lines);
const prepared = ['', ...cssLines.map((line) => (line.trim() === '' ? '' : ' ' + line.trimStart()))];
if (closeIdx === -1) {
return [...lines, '', '<style>', ...prepared.slice(1), '</style>'];
}
return [
...lines.slice(0, closeIdx),
...prepared,
...lines.slice(closeIdx),
];
}
function findLastStyleCloseLine(lines) {
for (let i = lines.length - 1; i >= 0; i--) {
if (/<\/style\s*>/.test(lines[i])) return i;
}
return -1;
}
function bakeParamValuesInCss(cssLines, paramValues) {
if (!paramValues || Object.keys(paramValues).length === 0) return cssLines;
return cssLines.map((line) => {
let out = line;
for (const [key, value] of Object.entries(paramValues)) {
const varName = `--p-${key}`;
out = out.replace(new RegExp(`var\\(${escapeRegExp(varName)}(?:,\\s*[^)]+)?\\)`, 'g'), String(value));
}
return out;
});
}
function sanitizeAcceptedSvelteCss(cssLines, variantNum, paramValues = null, rootTag = 'div') {
const css = String((cssLines || []).join('\n'));
if (!/data-impeccable-variant|impeccable-variant-ready/.test(css)) return cssLines;
const rules = parseCssRules(css);
const output = [];
for (const rule of rules) {
appendSanitizedCssRule(output, rule, variantNum, paramValues, rootTag);
}
return output.join('\n')
.split('\n')
.map((line) => line.trimEnd())
.filter((line) => line.trim() !== '');
}
function appendSanitizedCssRule(output, rule, variantNum, paramValues, rootTag) {
const prelude = rule.prelude.trim();
const body = rule.body.trim();
if (!prelude || !body || /--impeccable-variant-ready\s*:/.test(body)) return;
if (/^@scope\b/i.test(prelude)) {
if (/data-impeccable-variant/.test(prelude) && !selectorHasVariant(prelude, variantNum)) return;
const inner = parseCssRules(body);
for (const innerRule of inner) {
const rewrittenPrelude = rewriteAcceptedSvelteSelector(innerRule.prelude, variantNum, paramValues, rootTag, true);
if (!rewrittenPrelude || /--impeccable-variant-ready\s*:/.test(innerRule.body)) continue;
output.push(formatCssRule(rewrittenPrelude, innerRule.body.trim()));
}
return;
}
const rewrittenPrelude = rewriteAcceptedSvelteSelector(prelude, variantNum, paramValues, rootTag, false);
if (!rewrittenPrelude) return;
output.push(formatCssRule(rewrittenPrelude, body));
}
function parseCssRules(css) {
const rules = [];
const text = String(css || '');
let i = 0;
while (i < text.length) {
while (i < text.length && /\s/.test(text[i])) i++;
const preludeStart = i;
while (i < text.length && text[i] !== '{') i++;
if (i >= text.length) break;
const prelude = text.slice(preludeStart, i).trim();
i++;
const bodyStart = i;
let depth = 1;
let quote = null;
let comment = false;
while (i < text.length && depth > 0) {
const ch = text[i];
const next = text[i + 1];
if (comment) {
if (ch === '*' && next === '/') {
comment = false;
i += 2;
continue;
}
i++;
continue;
}
if (quote) {
if (ch === '\\') {
i += 2;
continue;
}
if (ch === quote) quote = null;
i++;
continue;
}
if (ch === '/' && next === '*') {
comment = true;
i += 2;
continue;
}
if (ch === '"' || ch === "'") {
quote = ch;
i++;
continue;
}
if (ch === '{') depth++;
else if (ch === '}') depth--;
i++;
}
const body = text.slice(bodyStart, Math.max(bodyStart, i - 1));
if (prelude) rules.push({ prelude, body });
}
return rules;
}
function rewriteAcceptedSvelteSelector(prelude, variantNum, paramValues, rootTag, fromScope) {
const selectors = splitSelectorList(prelude);
const rewritten = [];
for (const selector of selectors) {
const next = rewriteAcceptedSvelteSelectorPart(selector, variantNum, paramValues, rootTag, fromScope);
if (next) rewritten.push(next);
}
return rewritten.join(', ');
}
function rewriteAcceptedSvelteSelectorPart(selector, variantNum, paramValues, rootTag, fromScope) {
let out = selector.trim();
const hasVariant = /data-impeccable-variant/.test(out);
if (hasVariant && !selectorHasVariant(out, variantNum)) return '';
if (hasVariant) {
out = out.replace(variantSelectorRegex(variantNum), '');
out = out.replace(/\[data-impeccable-variant=(["']).*?\1\]/g, '');
}
const paramResult = rewriteParamSelectors(out, paramValues);
if (!paramResult.keep) return '';
out = paramResult.selector;
out = out
.replace(/:scope(?:\[[^\]]+\])?\s*>\s*/g, '')
.replace(/:scope(?:\[[^\]]+\])?/g, rootTag || '')
.replace(/\s+/g, ' ')
.trim();
out = out.replace(/^[>+~]\s*/, '').trim();
if (!out && (hasVariant || fromScope)) return rootTag || ':global(*)';
return out;
}
function rewriteParamSelectors(selector, paramValues) {
let keep = true;
const next = selector.replace(/\[data-p-([A-Za-z0-9_-]+)(?:=(["'])(.*?)\2)?\]/g, (_match, key, _quote, expected) => {
if (!paramValues || !Object.prototype.hasOwnProperty.call(paramValues, key)) return '';
const actual = paramValues[key];
if (expected != null && String(actual) !== String(expected)) {
keep = false;
return '';
}
if (expected == null && (actual === false || actual == null || actual === 'false' || actual === 'off' || actual === '0')) {
keep = false;
return '';
}
return '';
});
return { keep, selector: next };
}
function selectorHasVariant(selector, variantNum) {
return variantSelectorRegex(variantNum).test(selector);
}
function variantSelectorRegex(variantNum) {
return new RegExp(`\\[data-impeccable-variant=(["'])${escapeRegExp(String(variantNum))}\\1\\]`, 'g');
}
function formatCssRule(selector, body) {
return `${selector} { ${body.trim()} }`;
}
function escapeRegExp(value) {
return String(value).replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
export function inlineSvelteComponentAccept(manifest, variantNum, paramValues = null, cwd = process.cwd()) {
const sourceFile = resolveSourceFile(manifest.sourceFile, cwd);
const variantPath = path.join(cwd, manifest.componentDir, `v${variantNum}.svelte`);
const resultBase = {
file: manifest.sourceFile,
sourceFile: manifest.sourceFile,
previewMode: 'svelte-component',
componentDir: manifest.componentDir,
carbonize: false,
};
if (!fs.existsSync(variantPath)) {
return { handled: false, error: `Variant ${variantNum} not found`, ...resultBase };
}
const { markup, cssLines } = parseSvelteComponentFile(fs.readFileSync(variantPath, 'utf-8'));
if (manifest.mode === 'insert') {
return inlineSvelteComponentInsertAccept({
manifest,
markup,
cssLines,
variantNum,
paramValues,
sourceFile,
resultBase,
cwd,
});
}
const rootTag = matchOpeningTag(markup)?.tag || 'div';
const contract = manifest.propContract || [];
const compiler = loadSvelteCompiler(cwd);
const mergedMarkup = mergeOriginalTopLevelAttrs(markup, manifest.originalMarkup || '');
// Restore props back to route expressions. Contract v2 restores through the
// AST so a prop used without braces (each headers, attribute positions)
// still maps back to its original expression; v1 falls back to the textual
// placeholder swap.
let restoredText;
if (Number(manifest.contractVersion) === 2 && compiler) {
const restored = restoreSvelteMarkup(mergedMarkup, contract, compiler.parse);
if (!restored.ok) {
return { handled: false, error: 'Accepted variant does not parse: ' + restored.reason, ...resultBase };
}
restoredText = restored.markup;
} else {
restoredText = substitutePropsWithExprs(mergedMarkup, contract);
}
const restoredMarkup = restoredText.split('\n').map((line) => line.trimEnd());
const sourceContent = fs.readFileSync(sourceFile, 'utf-8');
const sourceLines = sourceContent.split('\n');
const start = Number(manifest.sourceStartLine) - 1;
const end = Number(manifest.sourceEndLine) - 1;
if (!Number.isInteger(start) || !Number.isInteger(end) || start < 0 || end < start || end >= sourceLines.length) {
return { handled: false, error: 'Invalid source line range for ' + manifest.sourceFile, ...resultBase };
}
const indent = sourceLines[start].match(/^(\s*)/)?.[1] || '';
const indentedMarkup = reindentPreservingStructure(restoredMarkup, indent);
let newLines = [
...sourceLines.slice(0, start),
...indentedMarkup,
...sourceLines.slice(end + 1),
];
// Selectors that were already unused before this accept are the user's
// pre-existing code; the pruning pass must not touch them.
const preUnused = compiler ? collectUnusedSelectors(sourceContent, compiler.compile) : new Set();
// Bake params (declared kinds from params.json drive branch pruning), then
// MERGE into the component's existing style block: matching selectors are
// replaced, new ones appended. Appending alone is how superseded rules used
// to survive their own replacement.
const declaredParams = readDeclaredParams(manifest, variantNum, cwd);
let variantCss = cssLines.join('\n');
if (/data-impeccable-variant|impeccable-variant-ready/.test(variantCss)) {
// Defensive: strip preview-wrapper selectors that authoring rules forbid
// on this path but an off-spec agent may still emit.
variantCss = sanitizeAcceptedSvelteCss(cssLines, variantNum, paramValues, rootTag).join('\n');
}
const bakedCss = bakeParamValues(variantCss, declaredParams, paramValues || {});
const cssStats = { replaced: 0, appended: 0, pruned: [], superseded: [] };
if (bakedCss.trim()) {
const merged = mergeCssIntoSvelteSource(newLines.join('\n'), bakedCss);
newLines = merged.text.split('\n');
cssStats.replaced = merged.replaced;
cssStats.appended = merged.appended;
}
let finalText = newLines.join('\n');
// Preview truth: the detached preview never applied the source rules that
// styled the replaced selection, so the user approved a design without
// them. Any seeded selector the variant did not re-declare is superseded;
// left in place it re-attaches through kept class names (the accepted root
// keeps its original classes) and re-layouts markup it no longer owns.
//
// Removal is bounded by ownership: a selector whose classes are still used
// by route markup OUTSIDE the replaced region does not belong to the pick
// alone, and removing it would strip styling from markup this accept never
// touched. Keeping it risks a visible re-attachment quirk on the accepted
// region; deleting it breaks the rest of the route. Keep it.
const outsideMarkup = [...sourceLines.slice(0, start), ...sourceLines.slice(end + 1)]
.join('\n')
.replace(/<style\b[^>]*>[\s\S]*?<\/style\s*>/gi, '');
const outsideClasses = new Set();
{
const attrRe = /class\s*=\s*(["'])(.*?)\1/g;
let cm;
while ((cm = attrRe.exec(outsideMarkup))) {
for (const cls of cm[2].split(/\s+/)) if (cls && !cls.includes('{')) outsideClasses.add(cls);
}
const directiveRe = /class:([A-Za-z0-9_-]+)/g;
while ((cm = directiveRe.exec(outsideMarkup))) outsideClasses.add(cm[1]);
}
const usedOutsideReplacedRegion = (selector) => {
const classTokenRe = /\.([A-Za-z0-9_-]+)/g;
let tm;
while ((tm = classTokenRe.exec(selector))) {
if (outsideClasses.has(tm[1])) return true;
}
return false;
};
const incomingSelectors = collectAllSelectors(bakedCss);
const superseded = (manifest.seededSelectors || [])
.map((selector) => normalizeSelector(selector))
.filter((selector) => selector && !incomingSelectors.has(selector) && !usedOutsideReplacedRegion(selector));
if (superseded.length > 0) {
const scrubbed = removeSelectorsFromSvelteSource(finalText, new Set(superseded));
finalText = scrubbed.text;
cssStats.superseded = scrubbed.removed;
}
if (compiler) {
const pruned = pruneUnusedSelectors(finalText, compiler.compile, { skipSelectors: preUnused });
finalText = pruned.source;
cssStats.pruned = pruned.removed;
}
// Postcondition: no selector from the user's pre-accept CSS may vanish
// unless the compiler-driven prune or the preview-truth supersession
// deliberately removed it. This turns any parser or reconciler defect into
// a loud refusal instead of silent damage to a hand-written style block.
const lostSelectors = findLostSelectors(sourceContent, finalText, [
...cssStats.pruned,
...cssStats.superseded,
]);
if (lostSelectors.length > 0) {
return {
handled: false,
error: 'CSS reconciliation would lose selectors from the existing style block: '
+ lostSelectors.join(', ')
+ '. Source not modified; accept the variant manually.',
mode: 'error',
...resultBase,
};
}
try {
fs.writeFileSync(sourceFile, finalText, 'utf-8');
} catch (err) {
return { handled: false, error: 'Failed to write Svelte source: ' + err.message, ...resultBase };
}
removeSvelteComponentSession(manifest.id, cwd);
const verify = verifyAcceptedSource(finalText);
return {
handled: true,
css: cssStats,
verify,
...resultBase,
};
}
/** Re-indent a block onto `indent` while preserving its internal structure. */
export function reindentPreservingStructure(lines, indent) {
const nonEmpty = lines.filter((line) => line.trim() !== '');
if (nonEmpty.length === 0) return lines.map(() => '');
const minIndent = Math.min(...nonEmpty.map((line) => (line.match(/^\s*/) || [''])[0].length));
return lines.map((line) => {
if (line.trim() === '') return '';
const current = (line.match(/^\s*/) || [''])[0].length;
return indent + line.slice(Math.min(minIndent, current));
});
}
function styleBlockText(sourceText) {
const match = String(sourceText || '').match(/<style\b[^>]*>([\s\S]*?)<\/style\s*>/i);
return match ? match[1] : '';
}
/**
* Remove every rule whose (normalized) selector list is fully contained in
* `selectors` from the component's style block, at any at-rule nesting depth.
* Rules that mix doomed and surviving selectors keep the survivors.
*/
export function removeSelectorsFromSvelteSource(sourceText, selectors) {
const text = String(sourceText || '');
const styleRe = /<style\b[^>]*>([\s\S]*?)<\/style\s*>/gi;
let lastMatch = null;
let m;
while ((m = styleRe.exec(text))) lastMatch = m;
if (!lastMatch) return { text, removed: [] };
const removed = [];
const transform = (nodes) => {
const kept = [];
for (const node of nodes) {
if (node.type === 'rule') {
const survivors = [];
for (const selector of splitSelectorList(node.prelude)) {
if (selectors.has(normalizeSelector(selector))) removed.push(normalizeSelector(selector));
else survivors.push(selector);
}
if (survivors.length > 0) kept.push({ ...node, prelude: survivors.join(', ') });
} else if (node.type === 'at' && node.children) {
const children = transform(node.children);
if (children.length > 0) kept.push({ ...node, children });
} else {
kept.push(node);
}
}
return kept;
};
const nodes = transform(parseStylesheet(lastMatch[1]));
if (removed.length === 0) return { text, removed };
const openTag = lastMatch[0].slice(0, lastMatch[0].indexOf('>') + 1);
const rebuilt = `${openTag}\n${serializeNodes(nodes).split('\n').map((l) => (l.trim() ? ' ' + l : '')).join('\n')}\n</style>`;
return {
text: text.slice(0, lastMatch.index) + rebuilt + text.slice(lastMatch.index + lastMatch[0].length),
removed,
};
}
export function findLostSelectors(beforeSource, afterSource, prunedSelectors = []) {
const before = collectAllSelectors(styleBlockText(beforeSource));
const after = collectAllSelectors(styleBlockText(afterSource));
const pruned = new Set((prunedSelectors || []).map((s) => normalizeSelector(s)));
const lost = [];
for (const selector of before) {
if (!after.has(selector) && !pruned.has(selector)) lost.push(selector);
}
return lost;
}
function readDeclaredParams(manifest, variantNum, cwd) {
try {
const raw = JSON.parse(fs.readFileSync(path.join(cwd, manifest.componentDir, 'params.json'), 'utf-8'));
const list = raw?.[String(variantNum)];
return Array.isArray(list) ? list : [];
} catch {
return [];
}
}
/**
* Merge CSS into a svelte component's top-level style block (created when
* absent), replacing rules whose selectors match and appending the rest.
*/
export function mergeCssIntoSvelteSource(sourceText, incomingCss) {
const text = String(sourceText || '');
const styleRe = /<style\b[^>]*>([\s\S]*?)<\/style\s*>/gi;
let lastMatch = null;
let m;
while ((m = styleRe.exec(text))) lastMatch = m;
if (!lastMatch) {
const { css, replaced, appended } = reconcileCss('', incomingCss);
return {
text: `${text.replace(/\s*$/, '')}\n\n<style>\n${indentCssBlock(css)}\n</style>\n`,
replaced,
appended,
};
}
const inner = lastMatch[1];
const { css, replaced, appended } = reconcileCss(inner, incomingCss);
const openTag = lastMatch[0].slice(0, lastMatch[0].indexOf('>') + 1);
const replacedBlock = `${openTag}\n${indentCssBlock(css)}\n</style>`;
return {
text: text.slice(0, lastMatch.index) + replacedBlock + text.slice(lastMatch.index + lastMatch[0].length),
replaced,
appended,
};
}
function indentCssBlock(css) {
return String(css || '')
.split('\n')
.map((line) => (line.trim() === '' ? '' : ' ' + line))
.join('\n');
}
function inlineSvelteComponentInsertAccept({
manifest,
markup,
cssLines,
variantNum,
paramValues,
sourceFile,
resultBase,
cwd,
}) {
if (!svelteMarkupHasVisibleContent(markup)) {
return { handled: false, error: 'Accepted Svelte insert variant is empty', ...resultBase };
}
if (/\bdata-impeccable-[\w-]*\s*=/.test(markup)) {
return { handled: false, error: 'Accepted Svelte insert variant contains preview-only data-impeccable attributes', ...resultBase };
}
const rootTag = matchOpeningTag(markup)?.tag || 'div';
const restoredMarkup = String(markup || '')
.split('\n')
.map((line) => line.trimEnd());
const sourceContent = fs.readFileSync(sourceFile, 'utf-8');
const sourceLines = sourceContent.split('\n');
const insertIndex = Number(manifest.insertLine) - 1;
if (!Number.isInteger(insertIndex) || insertIndex < 0 || insertIndex > sourceLines.length) {
return { handled: false, error: 'Invalid insert line for ' + manifest.sourceFile, ...resultBase };
}
const nearbyLine = sourceLines[insertIndex] ?? sourceLines[insertIndex - 1] ?? '';
const indent = nearbyLine.match(/^(\s*)/)?.[1] || '';
const indentedMarkup = reindentPreservingStructure(restoredMarkup, indent);
let newLines = [
...sourceLines.slice(0, insertIndex),
...indentedMarkup,
...sourceLines.slice(insertIndex),
];
let variantCss = cssLines.join('\n');
if (/data-impeccable-variant|impeccable-variant-ready/.test(variantCss)) {
variantCss = sanitizeAcceptedSvelteCss(cssLines, variantNum, paramValues, rootTag).join('\n');
}
const declaredParams = readDeclaredParams(manifest, variantNum, cwd);
const bakedCss = bakeParamValues(variantCss, declaredParams, paramValues || {});
if (bakedCss.trim()) {
const merged = mergeCssIntoSvelteSource(newLines.join('\n'), bakedCss);
newLines = merged.text.split('\n');
}
try {
fs.writeFileSync(sourceFile, newLines.join('\n'), 'utf-8');
} catch (err) {
return { handled: false, error: 'Failed to write Svelte source: ' + err.message, ...resultBase };
}
removeSvelteComponentSession(manifest.id, cwd);
const verify = verifyAcceptedSource(newLines.join('\n'));
return {
handled: true,
verify,
...resultBase,
};
}
function svelteMarkupHasVisibleContent(markup) {
const text = String(markup || '')
.replace(/<script[\s\S]*?<\/script>/gi, '')
.replace(/<style[\s\S]*?<\/style>/gi, '')
.replace(/<!--[\s\S]*?-->/g, '')
.replace(/<[^>]+>/g, ' ')
.replace(/\s+/g, ' ')
.trim();
if (text.length > 0) return true;
return /<(img|svg|canvas|video|audio|picture|input|button|select|textarea)\b/i.test(markup || '');
}
function mergeOriginalTopLevelAttrs(markup, originalMarkup) {
const variantOpen = matchOpeningTag(markup);
const originalOpen = matchOpeningTag(originalMarkup);
if (!variantOpen || !originalOpen) return markup;
if (variantOpen.tag.toLowerCase() !== originalOpen.tag.toLowerCase()) return markup;
const variantAttrs = parseAttrSegments(variantOpen.attrs);
const originalAttrs = parseAttrSegments(originalOpen.attrs);
const additions = [];
let attrs = variantOpen.attrs;
const originalClass = originalAttrs.get('class');
const variantClass = variantAttrs.get('class');
if (originalClass && variantClass) {
const merged = mergeStaticClassAttr(originalClass, variantClass);
if (merged) {
attrs = attrs.slice(0, variantClass.start) + merged + attrs.slice(variantClass.end);
variantAttrs.set('class', { ...variantClass, raw: merged });
}
} else if (originalClass && !variantClass) {
additions.push(originalClass.raw);
}
for (const [name, attr] of originalAttrs) {
if (name === 'class') continue;
if (!variantAttrs.has(name)) additions.push(attr.raw);
}
if (additions.length === 0 && attrs === variantOpen.attrs) return markup;
const nextOpen = variantOpen.prefix
+ variantOpen.tag
+ attrs
+ additions.map((attr) => ' ' + attr.trim()).join('')
+ variantOpen.close;
return markup.slice(0, variantOpen.index) + nextOpen + markup.slice(variantOpen.index + variantOpen.raw.length);
}
function matchOpeningTag(markup) {
const match = String(markup || '').match(/^(\s*<)([A-Za-z][\w:-]*)([^>]*?)(\/?>)/);
if (!match) return null;
return {
raw: match[0],
prefix: match[1],
tag: match[2],
attrs: match[3] || '',
close: match[4],
index: match.index || 0,
};
}
function parseAttrSegments(attrs) {
const out = new Map();
const re = /([A-Za-z_:][\w:.-]*)(?:\s*=\s*(?:"[^"]*"|'[^']*'|\{[^}]*\}|[^\s"'>=]+))?/g;
let match;
while ((match = re.exec(attrs))) {
const raw = match[0];
const name = match[1];
out.set(name, {
name,
raw,
start: match.index,
end: match.index + raw.length,
});
}
return out;
}
function mergeStaticClassAttr(originalClass, variantClass) {
const originalValue = originalClass.raw.match(/class\s*=\s*(["'])(.*?)\1/);
const variantValue = variantClass.raw.match(/class\s*=\s*(["'])(.*?)\1/);
if (!originalValue || !variantValue) return null;
const quote = variantValue[1];
const classes = [
...variantValue[2].split(/\s+/),
...originalValue[2].split(/\s+/),
].filter(Boolean);
return `class=${quote}${[...new Set(classes)].join(' ')}${quote}`;
}
export function removeSvelteComponentSession(id, cwd = process.cwd()) {
const dir = componentSessionDir(id, cwd);
try {
fs.rmSync(dir, { recursive: true, force: true });
} catch { /* non-fatal */ }
}
/**
* Compile-check every variant component of a session with the app's own
* compiler, BEFORE the browser ever imports them. A variant that does not
* compile (the classic: a second top-level <style> appended next to the
* seeded one) used to surface as a red Vite overlay in the user's page plus
* a mount-failure round trip; bounced at publish time it is a private
* agent-side fix with the exact file and line.
*/
export function compileCheckVariants(id, cwd = process.cwd()) {
const manifest = findSvelteComponentManifest(id, cwd);
if (!manifest || !manifest.manifestPath) return { ok: true, failures: [], checked: 0 };
const compiler = loadSvelteCompiler(cwd);
if (!compiler || typeof compiler.compile !== 'function') return { ok: true, failures: [], checked: 0 };
const sessionDir = path.dirname(manifest.manifestPath);
const failures = [];
let checked = 0;
let entries = [];
try { entries = fs.readdirSync(sessionDir); } catch { return { ok: true, failures: [], checked: 0 }; }
for (const name of entries) {
if (!/^v\d+\.svelte$/.test(name)) continue;
checked++;
try {
compiler.compile(fs.readFileSync(path.join(sessionDir, name), 'utf-8'), { generate: false });
} catch (err) {
failures.push({
file: `${manifest.componentDir}/${name}`,
line: err?.start?.line ?? null,
column: err?.start?.column ?? null,
message: String(err?.message || err).split('\n')[0].slice(0, 300),
});
}
}
return { ok: failures.length === 0, failures, checked };
}
/**
* Snapshot the agent-authored variant files into a fresh revision directory
* and stamp the manifest. Called by the server on every publish (`done`
* reply) for a component session; the browser imports from the revision dir,
* so the dev server can never serve a stale compile of a republished file.
*/
export function bumpSvelteComponentPreviewRevision(id, cwd = process.cwd()) {
const manifest = findSvelteComponentManifest(id, cwd);
if (!manifest || !manifest.manifestPath) return null;
const sessionDir = path.dirname(manifest.manifestPath);
const revision = Number(manifest.revision || 0) + 1;
const revDirName = `r${revision}`;
const revDir = path.join(sessionDir, revDirName);
try {
fs.mkdirSync(revDir, { recursive: true });
let entries = [];
try { entries = fs.readdirSync(sessionDir, { withFileTypes: true }); } catch { /* empty */ }
for (const entry of entries) {
if (!entry.isFile()) continue;
if (entry.name === 'manifest.json') continue;
fs.copyFileSync(path.join(sessionDir, entry.name), path.join(revDir, entry.name));
}
// Previous revision dirs are dead the moment a new one exists.
for (const entry of entries) {
if (entry.isDirectory() && /^r\d+$/.test(entry.name) && entry.name !== revDirName) {
try { fs.rmSync(path.join(sessionDir, entry.name), { recursive: true, force: true }); } catch { /* non-fatal */ }
}
}
const relSessionDir = path.relative(cwd, sessionDir).split(path.sep).join('/');
const updated = {
...manifest,
revision,
revisionDir: `${relSessionDir}/${revDirName}`,
revisionDirAbs: revDir.split(path.sep).join('/'),
};
delete updated.manifestPath;
fs.writeFileSync(manifest.manifestPath, JSON.stringify(updated, null, 2) + '\n', 'utf-8');
return { revision, revisionDir: updated.revisionDir };
} catch {
return null;
}
}
/**
* Stop-path sweep. The whole `node_modules/.impeccable-live` tree is
* impeccable-owned and gitignored, so once no session should survive there is
* nothing left worth keeping: the per-session dirs, the generated
* `__runtime.js`, and the parent directory all go. The old per-entry loop
* skipped `__*` entries and the parent, which left the runtime shim and an
* empty directory in every project that ever ran live mode once.
*/
export function removeAllSvelteComponentSessions(cwd = process.cwd()) {
for (const rootRel of [SVELTE_COMPONENT_ROOT, LEGACY_SVELTE_COMPONENT_ROOT]) {
const root = path.join(cwd, rootRel);
if (!fs.existsSync(root)) continue;
try {
fs.rmSync(root, { recursive: true, force: true });
} catch { /* non-fatal */ }
}
}
/**
* Boot-path sweep. A restart must not delete the tree wholesale: sessions
* recorded in the session store may still be mid-generation. Remove only the
* session dirs whose id has no active snapshot, then drop `__runtime.js` and
* the parent directory when nothing is left to serve.
*
* @param {Iterable<string>} activeIds session ids that must be preserved
* @returns {{ removed: string[], removedRoot: boolean, kept: string[] }}
*/
export function sweepInactiveSvelteComponentSessions(activeIds = [], cwd = process.cwd()) {
const result = { removed: [], removedRoot: false, kept: [] };
const active = new Set();
for (const id of activeIds || []) {
if (typeof id === 'string' && id) active.add(id);
}
for (const rootRel of [SVELTE_COMPONENT_ROOT, LEGACY_SVELTE_COMPONENT_ROOT]) {
const root = path.join(cwd, rootRel);
if (!fs.existsSync(root)) continue;
let entries;
try {
entries = fs.readdirSync(root, { withFileTypes: true });
} catch {
continue;
}
let keptHere = 0;
for (const entry of entries) {
if (!entry.isDirectory()) continue;
if (entry.name.startsWith('__')) continue;
if (active.has(entry.name)) {
result.kept.push(entry.name);
keptHere++;
continue;
}
try {
fs.rmSync(path.join(root, entry.name), { recursive: true, force: true });
result.removed.push(entry.name);
} catch {
// Could not remove it, so it still occupies the tree; treat it as kept
// so the parent directory is not torn out from under it.
result.kept.push(entry.name);
keptHere++;
}
}
if (keptHere === 0) {
try {
fs.rmSync(root, { recursive: true, force: true });
result.removedRoot = true;
} catch { /* non-fatal */ }
}
}
return result;
}
export function deferredAcceptsPath(cwd = process.cwd()) {
const key = createHash('sha1').update(path.resolve(cwd)).digest('hex').slice(0, 16);
return path.join(os.tmpdir(), 'impeccable-live', key, 'deferred-svelte-component-accepts.json');
}
export function readDeferredAccepts(cwd = process.cwd()) {
const file = deferredAcceptsPath(cwd);
try {
return JSON.parse(fs.readFileSync(file, 'utf-8'));
} catch {
return { accepts: [] };
}
}
export function writeDeferredAccept(entry, cwd = process.cwd()) {
const file = deferredAcceptsPath(cwd);
fs.mkdirSync(path.dirname(file), { recursive: true });
const data = readDeferredAccepts(cwd);
data.accepts = (data.accepts || []).filter((item) => item.id !== entry.id);
data.accepts.push({ ...entry, createdAt: new Date().toISOString() });
fs.writeFileSync(file, JSON.stringify(data, null, 2) + '\n', 'utf-8');
}
export function applyDeferredSvelteComponentAccepts(cwd = process.cwd()) {
const file = deferredAcceptsPath(cwd);
const data = readDeferredAccepts(cwd);
const pending = Array.isArray(data.accepts) ? data.accepts : [];
const results = [];
const remaining = [];
for (const entry of pending) {
try {
const manifest = findSvelteComponentManifest(entry.id, cwd);
if (!manifest) {
results.push({ id: entry.id, ok: false, error: 'manifest not found' });
remaining.push(entry);
continue;
}
const result = inlineSvelteComponentAccept(
manifest,
entry.variantNum,
entry.paramValues || null,
cwd,
);
results.push({ id: entry.id, ok: result.handled !== false, result });
if (result.handled === false) remaining.push(entry);
} catch (err) {
results.push({ id: entry.id, ok: false, error: err.message });
remaining.push(entry);
}
}
if (remaining.length > 0) {
fs.writeFileSync(file, JSON.stringify({ accepts: remaining }, null, 2) + '\n', 'utf-8');
} else {
try { fs.rmSync(file, { force: true }); } catch {}
}
return { applied: results.filter((r) => r.ok).length, failed: results.filter((r) => !r.ok).length, results };
}
export function buildSvelteComponentCssAuthoring(count) {
const variantNumbers = Array.from({ length: count }, (_, i) => i + 1);
return {
mode: 'svelte-component',
styleTag: null,
strategy: 'component-style-block',
rulePattern: '.semantic-class { ... }',
selectorExamples: variantNumbers.map(() => '.expense-row { padding: 22px; }'),
requirements: [
'Write each variant as a real Svelte component file (v1.svelte, v2.svelte, ...).',
'Keep the prop names from propContract; bind dynamic text with {propName}, not literal snapshot text.',
'Put variant CSS in the component <style> block using semantic class selectors.',
'Author param-driven CSS against var(--p-<id>, default) and [data-p-<id>] using :global(...) so the runtime knob values reach the mounted root.',
'Declare params in componentDir/params.json keyed by variant number (e.g. {"1": [...], "2": [...]}), NOT as a data-impeccable-params attribute.',
'Do not use @scope or data-impeccable-variant selectors in component files.',
'Do not edit the route source file during generation; only edit files under componentDir.',
],
forbidden: [
'Do not use @scope blocks in Svelte component variants.',
'Do not copy live DOM snapshot text into markup when propContract provides bindings.',
'Do not add data-impeccable-* attributes inside component files. Svelte parses { in attribute values as an expression, so data-impeccable-params with JSON breaks the build; use componentDir/params.json instead.',
],
paramsFile: 'params.json',
};
}