/**
 * Skill pipeline check — Owliver skills and Board (UI) skills.
 *
 * Runs the *real* module graph through Vite, so `import.meta.glob`, the `@/`
 * alias and the Markdown loading all behave exactly as they do in the app. That
 * matters: the reliability problem this script exists for was never in the
 * Markdown, it was in what the pipeline did with a definition it could only
 * partly read, and a mock of that pipeline would have reproduced none of it.
 *
 *   node scripts/skill-check.mjs           # against source, as the dev server sees it
 *   node scripts/skill-check.mjs --dist    # also assert the built bundle carries every definition
 *
 * Exits non-zero on failure, so it can gate a build.
 */
import { readFileSync, readdirSync, existsSync } from 'node:fs';
import { join } from 'node:path';
import { createServer } from 'vite';

const ROOT = process.cwd();
const results = [];
const record = (name, pass, detail = '') => {
  results.push({ name, pass, detail });
  const mark = pass ? '  ok  ' : ' FAIL ';
  console.log(`[${mark}] ${name}${detail ? ` — ${detail}` : ''}`);
};

const server = await createServer({
  root: ROOT,
  server: { middlewareMode: true },
  appType: 'custom',
  logLevel: 'error',
});

const reg = await server.ssrLoadModule('/src/lib/skills/registry.js');
const placement = await server.ssrLoadModule('/src/components/ai-assistant/placement.js');

const contextFor = (pageKey) => Object.entries(placement.PLACEMENT_ROUTES)
  .find(([route]) => reg.pageKeyForRoute(route) === pageKey)?.[1] ?? null;

/* ── 1. Discovery ─────────────────────────────────────────────────────────── */
console.log('\n── Discovery ──');

const onDisk = readdirSync(join(ROOT, 'src/skills'))
  .flatMap((dir) => readdirSync(join(ROOT, 'src/skills', dir)).map((f) => `${dir}/${f}`))
  .filter((f) => f.endsWith('.md'));

record(
  'every .md under src/skills registers',
  reg.SKILLS.length === onDisk.length,
  `${reg.SKILLS.length} registered / ${onDisk.length} files`
);

record(
  'no duplicate skill ids',
  new Set(reg.SKILLS.map((s) => s.id)).size === reg.SKILLS.length,
  `${new Set(reg.SKILLS.map((s) => s.id)).size} unique ids`
);

record(
  'every skill declares at least one page',
  reg.SKILLS.every((s) => s.pages.length > 0)
);

/* Both managed lists are non-empty — the Workspace → Skills tabs. */
const uiFacet = reg.skillsWithFacet(reg.SKILLS, 'ui');
const owliverFacet = reg.skillsWithFacet(reg.SKILLS, 'owliver');
record('Owliver Skills list is populated', owliverFacet.length > 0, `${owliverFacet.length} skills`);
record(
  'Board Skills list resolves without error',
  Array.isArray(uiFacet),
  `${uiFacet.length} skills declare a \`ui:\` block`
);

/* ── 2. Registration integrity: nothing half-loads in silence ─────────────── */
console.log('\n── Registration integrity ──');

const clean = reg.readSkillRegistry([]);
record(
  'shipped registry reports no diagnostics',
  clean.diagnostics.length === 0,
  clean.diagnostics.map((d) => d.message).join(' | ') || 'none'
);

record(
  'every shipped skill registered every capability it declared',
  reg.SKILLS.every((s) => !(s.owliverErrors?.length || s.uiErrors?.length))
);

/* An unreadable stored definition must be REPORTED, not swallowed. */
const brokenYaml = `---\nid: broken\n  name: bad indent\n---\n# Broken\n`;
const withBroken = reg.readSkillRegistry([{ path: 'custom/broken.md', raw: brokenYaml }]);
record(
  'unreadable stored skill is reported, not silently dropped',
  withBroken.diagnostics.some((d) => d.kind === 'unreadable'),
  withBroken.diagnostics.find((d) => d.kind === 'unreadable')?.message ?? 'NO DIAGNOSTIC'
);

/* A definition with one bad capability keeps the good one AND says so. */
const partial = `---
id: partial-check
name: Partial Check
description: One resolvable capability and one that names no source.
pages:
  - positions
status: active
owliver:
  enabled: true
  capabilities:
    - summary
    - flow
  responses:
    summary:
      source: position.activity
      periods:
        - today
---

# Partial Check
`;
const withPartial = reg.readSkillRegistry([{ path: 'custom/partial.md', raw: partial }]);
const partialSkill = withPartial.skills.find((s) => s.id === 'partial-check');
record(
  'partly-resolvable skill still registers its good capability',
  partialSkill?.owliver.capabilities.includes('summary'),
  `capabilities = ${JSON.stringify(partialSkill?.owliver.capabilities)}`
);
record(
  'and the capability it LOST is reported',
  withPartial.diagnostics.some((d) => d.kind === 'incomplete' && d.skillId === 'partial-check'),
  withPartial.diagnostics.find((d) => d.kind === 'incomplete')?.message ?? 'NO DIAGNOSTIC'
);

/* Shadowing a built-in is allowed, but must be visible. */
const shadow = `---\nid: create-position\nname: Shadow\ndescription: d\npages:\n  - positions\nstatus: active\n---\n\n# Shadow\n`;
const withShadow = reg.readSkillRegistry([{ path: 'custom/shadow.md', raw: shadow }]);
record(
  'a custom skill overriding a built-in is reported',
  withShadow.diagnostics.some((d) => d.kind === 'shadowed' && d.skillId === 'create-position'),
  withShadow.diagnostics.find((d) => d.kind === 'shadowed')?.message ?? 'NO DIAGNOSTIC'
);

/* ── 3. Markdown parsing: no silent content loss ──────────────────────────── */
console.log('\n── Markdown parsing ──');

const cp = reg.SKILLS.find((s) => s.id === 'create-position');
record(
  'wrapped bullets are read whole',
  cp.capabilities.some((c) => c.endsWith('out of a single sentence.')),
  cp.capabilities.find((c) => c.includes('single sentence')) ?? 'TRUNCATED'
);

record(
  'conversation steps all parse',
  cp.conversation.length === 7 && cp.conversation.every((s) => s.field && s.question),
  `${cp.conversation.length} steps`
);

const numbered = reg.parseSkill(
  `---\nid: numbered\nname: Numbered\ndescription: d\npages:\n  - positions\nstatus: active\n---\n\n`
  + `## Capabilities\n\n1. First instruction.\n2. Second instruction.\n3. Third instruction.\n`,
  { custom: true }
);
record(
  'numbered instructions are preserved',
  numbered.capabilities.length === 3,
  JSON.stringify(numbered.capabilities)
);

/* A section ends at the next `##`, and a heading that merely starts with the
   same word is a different heading. Both halves matter: the first is what stops
   `Capabilities` swallowing the rest of the file, the second is what stops a
   near-miss heading being read as the real one. */
const bounded = reg.parseSkill(
  `---\nid: bounded\nname: Bounded\ndescription: d\npages:\n  - positions\nstatus: active\n---\n\n`
  + `## Capabilities\n\n- one\n- two\n\n## Capabilities (v2)\n\n- three\n\n## Actions\n\n- four\n`,
  { custom: true }
);
record(
  'a section stops at the next heading',
  bounded.capabilities.length === 2,
  JSON.stringify(bounded.capabilities)
);

/* Sub-headings (`###`) belong to the section they sit under, and must not end
   it — `\n##\s` would match `### ` if the space were not required. */
const nested = reg.parseSkill(
  `---\nid: nested\nname: Nested\ndescription: d\npages:\n  - positions\nstatus: active\n---\n\n`
  + `## Capabilities\n\n- one\n\n### Detail\n\n- two\n\n## Actions\n\n- three\n`,
  { custom: true }
);
record(
  'a `###` sub-heading does not truncate its section',
  nested.capabilities.length === 2,
  JSON.stringify(nested.capabilities)
);

/* Frontmatter of every shipped file parses and carries its required fields. */
let frontmatterOk = true;
const frontmatterDetail = [];
for (const s of reg.SKILLS) {
  if (!s.id || !s.name || !s.pages.length) {
    frontmatterOk = false;
    frontmatterDetail.push(s.path);
  }
}
record('every shipped skill has id, name and pages', frontmatterOk, frontmatterDetail.join(', '));

/* ── 4. Trigger / matching ────────────────────────────────────────────────── */
console.log('\n── Trigger matching ──');

const positions = contextFor('positions');
record('positions context resolves', Boolean(positions), String(positions));

const MATRIX = [
  ['create a position', 'create-position'],
  ['i want to hire', 'create-position'],
  ['post a job', 'create-position'],
  ['add a client', 'create-position'],
  ['show hiring activity', 'hiring-activity-assistant'],
  ['hiring flow', 'hiring-activity-assistant'],
  ['applications over time', 'hiring-activity-assistant'],
];
for (const [question, expected] of MATRIX) {
  const got = reg.matchSkill(question, positions)?.id ?? null;
  record(`trigger "${question}" -> ${expected}`, got === expected, got ?? 'no match');
}

/* Every claimant is enumerable, so a contested phrase is not invisible. */
const contender = `---
id: zz-contender
name: ZZ Contender
description: Also claims a phrase create-position owns.
pages:
  - positions
status: active
triggers:
  - create a position
owliver:
  enabled: true
  capabilities:
    - summary
  responses:
    summary:
      source: position.activity
      periods:
        - today
---

# ZZ Contender
`;
const contested = [{ path: 'custom/zz.md', raw: contender }];
const claimants = reg.matchSkills('create a position', positions, [], contested);
record(
  'all trigger claimants are enumerable',
  claimants.length === 2,
  claimants.map((s) => s.id).join(', ')
);
record(
  'a contested trigger is reported as a collision',
  reg.readSkillRegistry(contested).diagnostics.some((d) => d.kind === 'trigger-collision'),
  reg.readSkillRegistry(contested).diagnostics.find((d) => d.kind === 'trigger-collision')?.message ?? 'NO DIAGNOSTIC'
);

/* ── 5. Owliver suggestions ───────────────────────────────────────────────── */
console.log('\n── Suggestions ──');

const resolver = await server.ssrLoadModule('/src/lib/skills/owliverResolver.js');
const declared = resolver.owliverSuggestions(positions, [], [], {});

record(
  'every declared suggestion names a capability the skill offers',
  declared.every((c) => !c.skillCapability
    || reg.SKILLS.find((s) => s.id === c.skillId)?.owliver.capabilities.includes(c.skillCapability))
);

const byIntent = declared.map((c) => `${c.skillId}:${c.skillCapability}`);
record(
  'no two declared suggestions resolve to one capability',
  new Set(byIntent).size === byIntent.length,
  byIntent.join(' | ')
);

const dynamic = await server.ssrLoadModule('/src/components/ai-assistant/dynamic.js');

/* The generator is exercised at three different data shapes: the labels must
   track the data, and must never appear when the count behind them is zero. */
const factsFor = (n) => ({
  postings: [], starvedPositions: new Array(n).fill({}), unscreened: new Array(n).fill({}),
  scored: [], stalled: [], ranked: [], activity: [], missingCredentials: [],
});
const shapes = [0, 1, 7, 12];
let labelsOk = true;
const offenders = [];
for (const n of shapes) {
  for (const chip of dynamic.buildPrompts('admin.positions', factsFor(n), null)) {
    /* A complete intent asks or instructs. A raw fragment — "4 ready for
       interview" — does neither, and is what this check exists to catch. */
    const isIntent = /\?$/.test(chip.label) || /^(show|summari[sz]e|create|continue|compare|find|explain|what|which|who)\b/i.test(chip.label);
    if (!isIntent) { labelsOk = false; offenders.push(`n=${n}: "${chip.label}"`); }
    if (n === 0 && /\b0\b/.test(chip.label)) { labelsOk = false; offenders.push(`n=0 leaked a zero count: "${chip.label}"`); }
  }
}
record('every generated label is a complete intent', labelsOk, offenders.join(' ; ') || 'all labels are intents');

/* Counts must move with the data rather than being baked in. */
const at7 = dynamic.buildPrompts('admin.positions', factsFor(7), null).map((c) => c.label);
const at12 = dynamic.buildPrompts('admin.positions', factsFor(12), null).map((c) => c.label);
record(
  'labels are dynamic, not hardcoded',
  at7.some((l) => l.includes('7')) && at12.some((l) => l.includes('12')) && !at7.some((l) => l.includes('12')),
  `7 -> ${at7.find((l) => l.includes('7'))} | 12 -> ${at12.find((l) => l.includes('12'))}`
);

const atZero = dynamic.buildPrompts('admin.positions', factsFor(0), null).map((c) => c.label);
record(
  'no count-bearing suggestion when the count is zero',
  !atZero.some((l) => /\d/.test(l)),
  atZero.join(' | ')
);

/**
 * The workforce branch — the one the fragments came from.
 *
 * "4 ready for interview" and "2 strong for Event Server" were generated here,
 * so a suggestion check that passes `null` for workforce proves nothing about
 * them. Applications are dated today so the "applied today" branch is live too.
 */
const workforceAt = (readyCount) => {
  const position = { id: 'p1', title: 'Event Server – Fine Dining', status: 'active', headcount: 5 };
  const today = new Date();
  const applications = Array.from({ length: readyCount }, (_, i) => ({
    id: `a${i}`,
    job_posting_id: 'p1',
    email: `c${i}@example.com`,
    applicant_name: `Candidate ${i}`,
    status: i % 2 ? 'ai_screened' : 'shortlisted',
    ai_score: 90,
    created_date: today.toISOString(),
    updated_date: today.toISOString(),
  }));
  return {
    positions: [position],
    currentPositionId: null,
    context: { applications, today, profiles: [], staff: [], assignments: [] },
  };
};

for (const n of [1, 4, 9]) {
  const labels = dynamic
    .buildPrompts('admin.positions', factsFor(2), workforceAt(n))
    .map((c) => c.label);

  const ready = labels.find((l) => /ready for interview/i.test(l));
  record(
    `workforce branch at ${n}: "ready for interview" is a complete question`,
    Boolean(ready) && /\?$/.test(ready) && ready.includes(String(n)) && /^Which\b/.test(ready),
    ready ?? 'NOT GENERATED'
  );

  /* Singular/plural has to track the count, or the fix trades one awkward
     label for another. */
  if (n === 1) {
    record(
      'a single candidate reads as one candidate',
      ready === 'Which 1 candidate is ready for interview?',
      ready ?? 'NOT GENERATED'
    );
  }

  const fragment = labels.find((l) => /^\d+\s/.test(l));
  record(
    `workforce branch at ${n}: no bare status fragments`,
    !fragment,
    fragment ?? 'none'
  );
}

/* ── 6. Authoring: what the editors save, and what they refuse ────────────── */
console.log('\n── Authoring ──');

const fields = await server.ssrLoadModule('/src/lib/skills/skillFields.js');
const templates = await server.ssrLoadModule('/src/lib/skills/customSkills.js');
const surfaces = await server.ssrLoadModule('/src/lib/skills/surfaces.js');

/* A template must produce something that works before it is edited. The Board
   template used to default to a source its own default placement cannot read. */
record(
  'the Board template validates as written',
  reg.validateSkillSource(templates.uiSkillTemplate({
    id: 'template-check', name: 'Template Check', pages: ['positions'],
  })) === null,
  reg.validateSkillSource(templates.uiSkillTemplate({
    id: 'template-check', name: 'Template Check', pages: ['positions'],
  })) || 'valid'
);

/* An Owliver block that can answer nothing is refused rather than saved and
   then reported as a skill that does not work. */
record(
  'an Owliver skill with no capabilities is refused',
  Boolean(reg.validateSkillSource(templates.owliverSkillTemplate({
    id: 'empty-owliver', name: 'Empty Owliver', pages: ['positions'],
  }))),
  reg.validateSkillSource(templates.owliverSkillTemplate({
    id: 'empty-owliver', name: 'Empty Owliver', pages: ['positions'],
  })) || 'ACCEPTED — should have been refused'
);

/* The section-can-never-resolve check, in both directions. */
const boardOn = (page, placement) => `---
id: context-check
name: Context Check
description: Reads position activity.
pages:
  - ${page}
status: active
ui:
  type: flow
  placement: ${placement}
  source: position.activity
---

# Context Check
`;

record(
  'a position source on a page with no position is refused',
  Boolean(reg.validateSkillSource(boardOn('analytics', 'after-header'))),
  reg.validateSkillSource(boardOn('analytics', 'after-header')) || 'ACCEPTED — should have been refused'
);
record(
  'the same source is refused above the Positions grid',
  Boolean(reg.validateSkillSource(boardOn('positions', 'after-position-list'))),
  reg.validateSkillSource(boardOn('positions', 'after-position-list')) || 'ACCEPTED — should have been refused'
);
record(
  'and accepted inside a position card',
  reg.validateSkillSource(boardOn('positions', 'after-position-card')) === null,
  reg.validateSkillSource(boardOn('positions', 'after-position-card')) || 'accepted'
);

/* Owliver responses are deliberately NOT subject to that rule: an unmet need is
   a question back, not a dead card. `hiring-activity-assistant` depends on it. */
record(
  'a shipped Owliver skill reading one position still validates',
  reg.validateSkillSource(
    reg.SKILLS.find((s) => s.id === 'hiring-activity-assistant').markdown
  ) === null
);

record(
  'every shipped definition still validates',
  reg.SKILLS.every((s) => reg.validateSkillSource(s.markdown) === null),
  reg.SKILLS.filter((s) => reg.validateSkillSource(s.markdown)).map((s) => s.id).join(', ') || 'all valid'
);

/* Reading a definition into the editor fields — the upload path. */
for (const skill of reg.SKILLS.filter((s) => s.kind === 'assistant')) {
  const read = fields.owliverFieldsFromSource(skill.markdown);
  record(
    `\`${skill.id}\` reads back into the Owliver fields`,
    read.id === skill.id && read.name === skill.name
      && read.pages.join(',') === skill.pages.join(','),
    `${read.name} / ${read.pages.join(', ')}`
  );
}

record(
  'an unparseable file leaves the fields empty rather than throwing',
  fields.owliverFieldsFromSource('not a definition').id === ''
);

/* Writing a field back — the half that used to do nothing. */
const original = reg.SKILLS.find((s) => s.id === 'hiring-activity-assistant').markdown;
const renamed = fields.patchFrontmatter(original, { name: 'Renamed Assistant' });

record(
  'patching a field changes what the registry reads',
  reg.parseSkill(renamed, { custom: true }).name === 'Renamed Assistant',
  reg.parseSkill(renamed, { custom: true }).name
);
record(
  'patching a field leaves the body untouched',
  reg.parseSkill(renamed, { custom: true }).body === reg.parseSkill(original, { custom: true }).body
);
record(
  'patching a field preserves frontmatter comments',
  renamed.includes('# One suggestion per capability.')
);
record(
  'patching a field changes nothing else',
  original.split('\n').filter((l) => !l.startsWith('name:')).join('\n')
    === renamed.split('\n').filter((l) => !l.startsWith('name:')).join('\n')
);
record(
  'a patched definition still validates',
  reg.validateSkillSource(renamed) === null,
  reg.validateSkillSource(renamed) || 'valid'
);

const repaged = fields.patchFrontmatter(original, { pages: ['analytics', 'activity'] });
record(
  'patching a list replaces the whole block',
  reg.parseSkill(repaged, { custom: true }).pages.join(',') === 'analytics,activity',
  reg.parseSkill(repaged, { custom: true }).pages.join(',')
);

const restatused = fields.patchFrontmatter(original, { status: 'inactive' });
record(
  'patching a key the file never declared adds it',
  reg.parseSkill(restatused, { custom: true }).status === 'inactive'
);

/* Both keys, because that is what the editor's own field handler writes: the
   registry reads capabilities as the union of the declared list and the keys of
   `responses:`, so patching one without the other changes nothing. */
const recapped = fields.patchFrontmatter(original, {
  'owliver.capabilities': ['summary'],
  'owliver.responses': { summary: { source: 'position.activity', periods: ['today'] } },
});
record(
  'patching a nested block rewrites only that block',
  reg.parseSkill(recapped, { custom: true }).owliver.capabilities.join(',') === 'summary',
  reg.parseSkill(recapped, { custom: true }).owliver.capabilities.join(',')
);
/* Asserted on the text, not on the parse: with `flow` no longer offered, the
   registry correctly drops the suggestion that names it — which is the rule
   working, not the patch reaching a sibling key it should not have. */
record(
  'and leaves its siblings in the same block alone',
  recapped.includes('Summarize hiring activity for this position')
    && recapped.includes('Show hiring activity as a flow')
    && recapped.includes('  enabled: true')
);

/* The two `ui:` shapes, told apart — the per-page form must not be overwritten
   from four single-valued fields. */
record(
  'the shorthand `ui:` form is recognised',
  fields.uiShape(boardOn('positions', 'after-position-card')) === 'shorthand'
);
record(
  'a definition with no `ui:` block reports none',
  fields.uiShape(original) === 'none'
);

/* The picker and the validator read the same table. */
record(
  'a position card supplies a position',
  surfaces.contextSuppliedBy(['positions'], 'after-position-card').includes('positionId')
);
record(
  'the Positions list supplies nothing',
  surfaces.contextSuppliedBy(['positions'], 'after-position-list').length === 0
);
record(
  'Analytics supplies nothing',
  surfaces.contextSuppliedBy(['analytics'], 'after-header').length === 0
);
record(
  'every surface declares what its placements provide',
  surfaces.SKILL_SURFACES.every((s) => s.provides && typeof s.provides === 'object'),
  surfaces.SKILL_SURFACES.filter((s) => !s.provides).map((s) => s.id).join(', ') || 'all declared'
);

/* ── 7. Upload hydration: a file, into the fields ─────────────────────────── */
console.log('\n── Upload hydration ──');

/**
 * The shapes people actually upload.
 *
 * Every case here is a definition that arrived from outside the editors, which
 * is the only way most definitions arrive. What is being asserted is not that
 * the parser is lenient — it is that the three identity fields, the pages and
 * the section a reader can see in the file are the ones the form shows.
 */
const COMPLETE = `---
id: hiring-activity-assistant
name: Hiring Activity Assistant
description: Answer questions about recent hiring activity on a position.
type: board
ui:
  - page: Positions
    placement: grid-card
    source: position.activity
---

# Hiring Activity Assistant
`;

const NO_ID = `---
name: Hiring Activity Assistant
description: Answer questions about recent hiring activity.
pages:
  - positions
---

# Hiring Activity Assistant
`;

const MULTI_PAGE = `---
id: hiring-activity
name: Hiring Activity
description: Hiring activity across the workspace.
ui:
  - page: Positions
    placement: grid-card
    source: candidates.activity
  - page: Analytics
    placement: panel
    source: hires.performance
---

# Hiring Activity
`;

/* Case 1 — a complete definition hydrates every field it declares. */
{
  const f = fields.boardFieldsFromSource(COMPLETE);
  record('upload: name hydrates', f.name === 'Hiring Activity Assistant', f.name || 'EMPTY');
  record('upload: id hydrates', f.id === 'hiring-activity-assistant', f.id || 'EMPTY');
  record(
    'upload: description hydrates',
    f.description === 'Answer questions about recent hiring activity on a position.',
    f.description || 'EMPTY'
  );
  record('upload: pages come from the `ui:` entries', f.pages.join(',') === 'positions', f.pages.join(',') || 'EMPTY');
  record('upload: `grid-card` resolves to a real placement', f.placement === 'after-position-card', f.placement || 'EMPTY');
  record('upload: source hydrates', f.source === 'position.activity', f.source || 'EMPTY');
  record('upload: an undeclared type is inferred from the source', f.type === 'flow', f.type || 'EMPTY');
  record('upload: the definition validates as written', reg.validateSkillSource(COMPLETE) === null,
    reg.validateSkillSource(COMPLETE) || 'valid');
  record('upload: it is classified as a Board skill',
    fields.facetsFromSource(COMPLETE).join(',') === 'ui', fields.facetsFromSource(COMPLETE).join(','));

  /* The same file read by the other editor's reader — one pipeline, two views. */
  const o = fields.owliverFieldsFromSource(COMPLETE);
  record('upload: the Owliver reader hydrates the same identity',
    o.id === f.id && o.name === f.name && o.description === f.description);
}

/* Case 2 — no `id:`, so it is slugged from the name and never invented. */
{
  const f = fields.boardFieldsFromSource(NO_ID);
  record('upload: a missing id slugs the name', f.id === 'hiring-activity-assistant', f.id || 'EMPTY');
  record('upload: a missing id does not become the placeholder path', f.id !== 'custom');
  record('upload: an explicit id is never replaced by a generated one',
    fields.boardFieldsFromSource(COMPLETE).id === 'hiring-activity-assistant');
  record('upload: a file with no frontmatter hydrates nothing',
    fields.boardFieldsFromSource('# Just a heading\n').id === '');
}

/* Case 3 — several pages, and every entry survives a field edit. */
{
  const f = fields.boardFieldsFromSource(MULTI_PAGE);
  record('upload: every page in the list is reported', f.pages.join(',') === 'positions,analytics', f.pages.join(','));

  const parsed = reg.parseSkill(MULTI_PAGE, { custom: true });
  record('upload: every entry becomes a section',
    parsed.ui.positions.sections.length === 1 && parsed.ui.analytics.sections.length === 1);
  record('upload: each entry keeps its own source',
    parsed.ui.positions.sections[0].source === 'candidates.activity'
      && parsed.ui.analytics.sections[0].source === 'hires.performance');
  record('upload: a multi-page definition validates', reg.validateSkillSource(MULTI_PAGE) === null,
    reg.validateSkillSource(MULTI_PAGE) || 'valid');

  /* The fields must not be able to flatten it. */
  record('upload: the section fields are read-only against a list', !fields.uiIsEditableFromFields(MULTI_PAGE));
  record('upload: a single-section definition stays field-editable',
    fields.uiIsEditableFromFields(templates.uiSkillTemplate({ id: 'x', name: 'X', pages: ['positions'] })));

  /* Renaming is identity, not structure: it must still work, and must not
     touch either entry. */
  const renamedMulti = fields.patchFrontmatter(MULTI_PAGE, { name: 'Renamed Multi' });
  const after = reg.parseSkill(renamedMulti, { custom: true });
  record('upload: renaming a multi-page definition keeps both entries',
    after.ui.positions?.sections.length === 1 && after.ui.analytics?.sections.length === 1,
    Object.keys(after.ui).join(','));
  record('upload: ...and actually renames it', after.name === 'Renamed Multi', after.name);
  record('upload: ...and leaves the `ui:` text byte-identical',
    renamedMulti.slice(renamedMulti.indexOf('ui:')) === MULTI_PAGE.slice(MULTI_PAGE.indexOf('ui:')));
}

/* Files as they actually arrive: from Windows, from a download, from paste. */
{
  const dirty = {
    'a byte-order mark': `${COMPLETE}`,
    'CRLF line endings': COMPLETE.replace(/\n/g, '\r\n'),
    'a BOM and CRLF': `${COMPLETE.replace(/\n/g, '\r\n')}`,
    'a blank line above the fence': `\n\n${COMPLETE}`,
    'trailing spaces on the fence': COMPLETE.replace(/^---$/gm, '---  '),
  };
  for (const [what, md] of Object.entries(dirty)) {
    const f = fields.boardFieldsFromSource(md);
    record(
      `upload: a file with ${what} still hydrates`,
      f.name === 'Hiring Activity Assistant' && f.id === 'hiring-activity-assistant'
        && f.pages.join(',') === 'positions',
      `${f.name || 'EMPTY'} / ${f.id || 'EMPTY'} / ${f.pages.join(',') || 'EMPTY'}`
    );
    record(
      `upload: ...and the registry reads it the same way`,
      reg.parseSkill(md, { custom: true }).name === 'Hiring Activity Assistant',
      reg.parseSkill(md, { custom: true }).name
    );
    record(`upload: ...and it validates`, reg.validateSkillSource(md) === null,
      reg.validateSkillSource(md) || 'valid');
  }

  /* Normalising on the way in is what keeps `patchFrontmatter` safe: an
     unrecognised fence would have it write a second one above the first. */
  const patchedDirty = fields.patchFrontmatter(fields.normalizeUpload(`${COMPLETE}`), { name: 'Clean' });
  record('upload: patching a normalised file writes one frontmatter block',
    (patchedDirty.match(/^---$/gm) || []).length === 2,
    `${(patchedDirty.match(/^---$/gm) || []).length} fences`);
  record('upload: ...and it still parses', reg.parseSkill(patchedDirty, { custom: true }).name === 'Clean');

  /* A file with nothing to read must be refused, not read as a blank skill. */
  record('upload: a file with no fence is not readable', !fields.isReadableDefinition('# Just prose\n'));
  record('upload: a real definition is readable', fields.isReadableDefinition(COMPLETE));
}

/* Page names and placements as they are written in the product, not as the
   vocabulary spells them internally. */
record('upload: `Positions` resolves to the positions surface', surfaces.canonicalPage('Positions') === 'positions');
record('upload: `Talent Pool` resolves to the talent-pool surface', surfaces.canonicalPage('Talent Pool') === 'talent-pool');
record('upload: `panel` on Analytics resolves to a real placement',
  surfaces.placementFor('analytics', 'panel') === 'after-header');
record('upload: an alias never resolves onto a surface that lacks it',
  surfaces.placementFor('analytics', 'grid-card') === null);
record('upload: a canonical placement still resolves to itself',
  surfaces.placementFor('positions', 'after-position-card') === 'after-position-card');

/* Case 4 — an existing definition reopened for editing. */
for (const skill of reg.SKILLS) {
  const f = skill.facets?.includes('ui')
    ? fields.boardFieldsFromSource(skill.markdown)
    : fields.owliverFieldsFromSource(skill.markdown);
  record(
    `reopening \`${skill.id}\` loads its identity unchanged`,
    f.id === skill.id && f.name === skill.name && f.description === skill.description
      && f.pages.join(',') === skill.pages.join(','),
    `${f.id} / ${f.name} / ${f.pages.join(', ')}`
  );
}

/* Case 5 — a manual edit is not reverted by later synchronisation. */
{
  /* The editor's own handler, in miniature: hydrate from the file, edit one
     field, then edit an unrelated one. The first edit must survive the second. */
  let draft = fields.owliverFieldsFromSource(COMPLETE);
  let src = COMPLETE;
  const edit = (patch) => {
    draft = { ...draft, ...patch };
    src = fields.patchFrontmatter(src, {
      id: draft.id || undefined,
      name: draft.name || undefined,
      description: draft.description || undefined,
      pages: draft.pages?.length && !fields.pagesAreDerived(src) ? draft.pages : undefined,
    });
  };

  edit({ name: 'My Own Name' });
  record('edit: a manual name reaches the artefact',
    reg.parseSkill(src, { custom: true }).name === 'My Own Name');

  edit({ description: 'My own description.' });
  record('edit: a later edit does not revert the earlier one',
    reg.parseSkill(src, { custom: true }).name === 'My Own Name',
    reg.parseSkill(src, { custom: true }).name);
  record('edit: ...and applies itself',
    reg.parseSkill(src, { custom: true }).description === 'My own description.');
  record('edit: ...and the `ui:` block is untouched throughout',
    src.slice(src.indexOf('ui:')) === COMPLETE.slice(COMPLETE.indexOf('ui:')));

  /* A second upload replaces the draft outright — it is a new source. */
  const rehydrated = fields.owliverFieldsFromSource(MULTI_PAGE);
  record('edit: a derived `pages:` is never written back',
    !src.includes('\npages:'), src.includes('\npages:') ? 'pages: was inserted' : 'not written');

  record('edit: a declared `pages:` still patches normally',
    reg.parseSkill(
      fields.patchFrontmatter(NO_ID, { pages: ['analytics'] }), { custom: true }
    ).pages.join(',') === 'analytics');

  record('edit: an inherited trigger is not written into the file',
    !src.includes('triggers:'), src.includes('triggers:') ? 'triggers: was materialised' : 'not written');
  record('edit: a declared trigger is still read into the fields',
    fields.owliverFieldsFromSource(
      reg.SKILLS.find((x) => x.id === 'hiring-activity-assistant').markdown
    ).triggers.includes('hiring activity'));
  record('edit: a definition with no triggers reads none',
    fields.owliverFieldsFromSource(COMPLETE).triggers.length === 0,
    JSON.stringify(fields.owliverFieldsFromSource(COMPLETE).triggers));

  record('edit: a second upload hydrates from the new file',
    rehydrated.id === 'hiring-activity' && rehydrated.name === 'Hiring Activity',
    `${rehydrated.id} / ${rehydrated.name}`);
}

await server.close();

/* ── 8. Production bundle ─────────────────────────────────────────────────── */
if (process.argv.includes('--dist')) {
  console.log('\n── Production bundle ──');
  const dir = join(ROOT, 'dist/assets');
  if (!existsSync(dir)) {
    record('dist/assets exists', false, 'run `npm run build` first');
  } else {
    const bundle = readdirSync(dir)
      .filter((f) => f.endsWith('.js'))
      .map((f) => readFileSync(join(dir, f), 'utf8'))
      .join('\n');

    for (const s of reg.SKILLS) {
      record(`bundle carries \`${s.id}\``, bundle.includes(s.id));
    }
    /* Body content, not just the id — a manifest naming a skill whose Markdown
       did not survive is the failure this is looking for. */
    record(
      'bundle carries skill body text',
      bundle.includes('Which client is this role for'),
      'create-position conversation step found in bundle'
    );
  }
}

/* ── Summary ──────────────────────────────────────────────────────────────── */
const failed = results.filter((r) => !r.pass);
console.log(`\n${results.length - failed.length}/${results.length} checks passed`);
if (failed.length) {
  console.log('\nFailed:');
  failed.forEach((r) => console.log(`  - ${r.name}${r.detail ? ` (${r.detail})` : ''}`));
  process.exit(1);
}