// tests/scripts/end-state-gate.test.mjs
// The end-state gate counts the distance to "Voyage is finished" as five tallies:
// open pipeline defects, unresolved experiments/opt-ins, dormant agents, open operator
// decisions, and feat commits after the freeze tag. "Finished" = all five at 0 AND the
// registry the gate counts from is intact against its frozen denominator.
//
// These tests pin the gate's MECHANICS in both directions — every tally can be 0 and can
// be > 0 — against throwaway fixture trees. They deliberately do NOT assert that the real
// repo is red today: the gate is supposed to go green, and a test that pins the current
// distance would fail on the day the work is done. What they DO pin about the real repo
// is the denominator itself (see "the frozen denominator" below).

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { mkdtempSync, mkdirSync, writeFileSync, rmSync, existsSync, readFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join, dirname, resolve } from 'node:path';
import { spawnSync } from 'node:child_process';
import { fileURLToPath } from 'node:url';
import {
  evaluateCondition,
  evaluateCheck,
  measure,
  loadRegistry,
  loadFrozen,
  spawnedNames,
  checkSignature,
  verifyIntegrity,
  render,
} from '../../scripts/end-state-gate.mjs';

const ROOT = resolve(dirname(fileURLToPath(import.meta.url)), '..', '..');
const GATE = join(ROOT, 'scripts', 'end-state-gate.mjs');

// --- the frozen denominator ------------------------------------------------
// Denominator frozen 2026-09-17 by the end-state work order, the day the end-state
// direction was chosen. An entry may CLOSE; it may never be removed or have its check
// changed, and the gate's agent/decision/freeze configuration may not move. To change
// anything below you must change this test — say in the commit message who decided it.
const FROZEN = {
  defects: {
    'D-01': '48f7f5cca070091e8f9b9ca0c7cdb7a1880733691935c25d07ea1d3e8d508fc9',
    'D-02': 'dfc94dba04a9116ae9be2097a0c5a9d8313b02c7de1ca6b49a472c1823a6d1e1',
    'D-03': '41dea56c14764494ed6d555ca97311b6001b0542f4ab69fa1dfc405780a57c32',
    'D-04': '721bdda19c0e98962acbfc78419bfb02790ee739694d1609b72d10481f0d6b62',
    'D-05': '8fe6df52b43496c3302400507cb98002dcf8d2a12d92085e14bda4c7819bc7ba',
    'D-06': '72a787c8154d1c18849e9856dcf1a67703d6b5541f88db81d6bab13cab14b418',
    'D-07': '1bf3e0cd36c621720697475b0a3fd7db78611d66b58a9ce035e7695e57c69f1b',
  },
  experiments: {
    'E-01': 'f7718897cec8ace6879fe79f5f32760ec957c3642e7186f8aa1688ce77b3f4e8',
    'E-02': 'c8ff12c504ba7a9ac36f11bb8f9b713263e9b4eb28c07d984d9e2115980e740d',
    'E-03': '17153ad8808615a833a49ae0c3523264ce055aa690e5542a75bae1874495e7e8',
  },
  agents: {
    dir: 'agents',
    spawnSites: 'commands/*.md',
    referenceMarker: 'Reference document, not a spawnable capability',
  },
  decisions: {
    file: 'STATE.md',
    section: '## Åpne operatørbeslutninger',
    open: '^- \\[ \\] ',
    closed: '^- \\[x\\] ',
  },
  freeze: { tag: 'end-state-freeze', featPattern: '^feat(\\(|!|:)' },
};

// --- helpers ---------------------------------------------------------------

function fixture(files) {
  const dir = mkdtempSync(join(tmpdir(), 'end-state-gate-'));
  for (const [rel, body] of Object.entries(files)) {
    const p = join(dir, rel);
    mkdirSync(dirname(p), { recursive: true });
    writeFileSync(p, body);
  }
  return dir;
}

const cleanup = (...dirs) => { for (const d of dirs) rmSync(d, { recursive: true, force: true }); };

const DECISIONS = { file: 'STATE.md', section: '## Open decisions', open: '^- \\[ \\] ', closed: '^- \\[x\\] ' };
const AGENTS = { dir: 'agents', spawnSites: 'commands/*.md', referenceMarker: 'Reference document, not a spawnable capability' };
const FREEZE = { tag: 'end-state-freeze', featPattern: '^feat(\\(|!|:)' };

function registry(overrides = {}) {
  return { defects: [], experiments: [], agents: AGENTS, decisions: DECISIONS, freeze: FREEZE, ...overrides };
}

// A frozen manifest that matches `reg` exactly.
function frozenFor(reg) {
  const sigs = (list) => Object.fromEntries(list.map((e) => [e.id, checkSignature(e.check)]));
  return { defects: sigs(reg.defects), experiments: sigs(reg.experiments), agents: reg.agents, decisions: reg.decisions, freeze: reg.freeze };
}

function git(dir, ...args) {
  const r = spawnSync('git', [
    '-c', 'user.name=fixture', '-c', 'user.email=fixture@example.invalid',
    '-c', 'core.hooksPath=/dev/null', '-c', 'commit.gpgsign=false', '-c', 'tag.gpgsign=false',
    ...args,
  ], { cwd: dir, encoding: 'utf8' });
  assert.equal(r.status, 0, `git ${args.join(' ')}: ${r.stderr}`);
  return r.stdout;
}

function gitInit(dir) {
  git(dir, 'init', '-q');
  git(dir, 'add', '-A');
  git(dir, 'commit', '-q', '--allow-empty', '-m', 'chore: fixture baseline');
}

function gitCommit(dir, subject) {
  git(dir, 'commit', '-q', '--allow-empty', '-m', subject);
}

const rowById = (result, id) => result.rows.find((r) => r.id === id);

// --- conditions -----------------------------------------------------------

test('evaluateCondition: match / no-match on a single file, multiline regex', () => {
  const dir = fixture({ 'a.md': 'intro\n### Heading\nbody\n' });
  try {
    assert.equal(evaluateCondition(dir, { path: 'a.md', pattern: '^### Heading', flags: 'm', expect: 'match' }), true);
    assert.equal(evaluateCondition(dir, { path: 'a.md', pattern: '^### Other', flags: 'm', expect: 'match' }), false);
    assert.equal(evaluateCondition(dir, { path: 'a.md', pattern: '^### Other', flags: 'm', expect: 'no-match' }), true);
  } finally { cleanup(dir); }
});

test('evaluateCondition: globs (dir/*.ext, dir/**/*.ext) and path arrays match ANY file', () => {
  const dir = fixture({
    'commands/x.md': 'nothing here\n',
    'lib/deep/y.mjs': 'const FLAG = process.env.SOME_FLAG;\n',
  });
  try {
    assert.equal(evaluateCondition(dir, { path: 'commands/*.md', pattern: 'SOME_FLAG', expect: 'match' }), false);
    assert.equal(evaluateCondition(dir, { path: 'lib/**/*.mjs', pattern: 'SOME_FLAG', expect: 'match' }), true);
    assert.equal(evaluateCondition(dir, { path: ['commands/*.md', 'lib/**/*.mjs'], pattern: 'SOME_FLAG', expect: 'match' }), true);
    assert.equal(evaluateCondition(dir, { path: ['commands/*.md', 'lib/**/*.mjs'], pattern: 'SOME_FLAG', expect: 'no-match' }), false);
  } finally { cleanup(dir); }
});

test('evaluateCondition: section scoping reads only from the heading to the next "## "', () => {
  const dir = fixture({
    'doc.md': '## 5. Design\nno status here\n## 6. PoC\n> **STATUS: RUN AND DECLINED**\n',
  });
  try {
    const inFive = { path: 'doc.md', section: '## 5.', pattern: '^> \\*\\*STATUS:', flags: 'm', expect: 'no-match' };
    const inSix = { ...inFive, section: '## 6.' };
    assert.equal(evaluateCondition(dir, inFive), true, 'section 5 has no status block');
    assert.equal(evaluateCondition(dir, inSix), false, 'section 6 has one');
  } finally { cleanup(dir); }
});

test('evaluateCondition: a literal NUL byte is detectable', () => {
  const dir = fixture({ 'nul.mjs': "const SEP = '\u0000';\n", 'clean.mjs': "const SEP = '\\x00';\n" });
  try {
    assert.equal(evaluateCondition(dir, { path: 'nul.mjs', pattern: '\\u0000', expect: 'match' }), true);
    assert.equal(evaluateCondition(dir, { path: 'clean.mjs', pattern: '\\u0000', expect: 'match' }), false);
  } finally { cleanup(dir); }
});

test('evaluateCondition: a missing file, a missing glob base or a missing section throws', () => {
  const dir = fixture({ 'a.md': 'x\n' });
  try {
    assert.throws(() => evaluateCondition(dir, { path: 'missing.md', pattern: 'x', expect: 'no-match' }), /missing\.md/);
    assert.throws(() => evaluateCondition(dir, { path: 'nodir/*.md', pattern: 'x', expect: 'no-match' }), /nodir/);
    assert.throws(() => evaluateCondition(dir, { path: 'a.md', section: '## 9.', pattern: 'x', expect: 'no-match' }), /## 9\./);
  } finally { cleanup(dir); }
});

test('evaluateCondition: a glob over an EXISTING dir with no matching files throws (no silent no-match)', () => {
  // In a no-match condition, "silently nothing matched" would read as the condition holding.
  const dir = fixture({ 'docs/readme.txt': 'x\n' });
  try {
    assert.throws(() => evaluateCondition(dir, { path: 'docs/*.md', pattern: 'x', expect: 'no-match' }), /docs\/\*\.md/);
    assert.throws(() => evaluateCondition(dir, { path: 'docs/**/*.md', pattern: 'x', expect: 'no-match' }), /docs\/\*\*\/\*\.md/);
  } finally { cleanup(dir); }
});

test('evaluateCheck: open only when ALL conditions hold; null check is not fellable', () => {
  const dir = fixture({
    'r.md': 'run the `### Bridge agent` block\n',
    'fixed.md': 'run the `### Bridge agent` block\n### Bridge agent\n',
  });
  const dangling = (file) => [
    { path: file, pattern: '`### Bridge agent`', expect: 'match' },
    { path: file, pattern: '^### Bridge agent', flags: 'm', expect: 'no-match' },
  ];
  try {
    assert.equal(evaluateCheck(dir, dangling('r.md')).status, 'open');
    assert.equal(evaluateCheck(dir, dangling('fixed.md')).status, 'closed');
    assert.equal(evaluateCheck(dir, null).status, 'not-fellable');
    const broken = evaluateCheck(dir, dangling('gone.md'));
    assert.equal(broken.status, 'not-fellable');
    assert.match(broken.detail, /gone\.md/);
  } finally { cleanup(dir); }
});

// --- spawn instructions (what "referenced by a command" means) -------------

test('spawnedNames: a row of a table headed `Agent` is a spawn instruction; other tables are not', () => {
  const md = [
    'Launch the new agents:', '',
    '| Agent | Purpose |', '|-------|---------|', '| `alpha-agent` | does a |', '| `beta-agent` | does b |', '',
    '| Name | Purpose |', '|------|---------|', '| `gamma-agent` | just a list |', '',
  ].join('\n');
  const names = spawnedNames(md);
  assert.ok(names.has('alpha-agent') && names.has('beta-agent'));
  assert.ok(!names.has('gamma-agent'), 'a table not headed "Agent" is not a roster');
});

test('spawnedNames: an imperative Launch/Spawn line names the agents it launches', () => {
  const md = [
    'Launch the **alpha-agent** agent:',
    '- Launch `beta-agent` (Agent tool) with the findings.',
    '3. Spawn `voyage:gamma-agent` in the background.',
    '**Launch** the `delta-agent` agent now.',
    'launch `epsilon-agent` too',
  ].join('\n');
  const names = spawnedNames(md);
  for (const n of ['alpha-agent', 'beta-agent', 'gamma-agent', 'delta-agent', 'epsilon-agent']) {
    assert.ok(names.has(n), `${n} should count as spawned`);
  }
});

test('spawnedNames: an agent block with a Prompt: line is a spawn instruction; a bare bold name is not', () => {
  const md = [
    '**alpha-agent** — adversarial review of the plan.',
    'Prompt: "Review this plan."',
    '',
    '**beta-agent** — mentioned for context only.',
    'It is not launched here.',
  ].join('\n');
  const names = spawnedNames(md);
  assert.ok(names.has('alpha-agent'));
  assert.ok(!names.has('beta-agent'));
});

test('spawnedNames: prose, negation, comments, fences and quotes are never spawn instructions', () => {
  const md = [
    'The alpha-agent is dormant and is never spawned.',
    'Never launch `beta-agent`.',
    'In quick mode we used to launch `gamma-agent`.',
    '<!-- Launch the `delta-agent` agent -->',
    '<!--',
    'Launch the `epsilon-agent` agent',
    '-->',
    '```',
    'Launch the `zeta-agent` agent',
    '| Agent |',
    '|---|',
    '| `eta-agent` |',
    '```',
    '> Launch the `theta-agent` agent',
  ].join('\n');
  const names = spawnedNames(md);
  for (const n of ['alpha-agent', 'beta-agent', 'gamma-agent', 'delta-agent', 'epsilon-agent', 'zeta-agent', 'eta-agent', 'theta-agent']) {
    assert.ok(!names.has(n), `${n} must not count as spawned`);
  }
});

// --- the tallies, both directions ------------------------------------------

test('defects tally: > 0 while a check holds, 0 once fixed; not-fellable counts as open', () => {
  const defect = {
    id: 'D-X',
    summary: 'removed tool still referenced',
    probe: 'phrase',
    check: [{ path: 'commands/plan.md', pattern: '\\bTeamCreate\\b', expect: 'match' }],
  };
  const unfellable = { id: 'D-Y', summary: 'no runnable check yet', check: null };
  const base = { 'STATE.md': '## Open decisions\n', 'agents/a.md': 'x\n', 'commands/plan.md': 'Launch `a`\n' };

  const red = fixture({ ...base, 'commands/plan.md': 'Launch `a` and TeamCreate\n' });
  const green = fixture(base);
  try {
    let row = rowById(measure(red, registry({ defects: [defect] })), 'defects');
    assert.equal(row.open, 1);
    assert.equal(row.total, 1);
    row = rowById(measure(green, registry({ defects: [defect] })), 'defects');
    assert.equal(row.open, 0);
    row = rowById(measure(green, registry({ defects: [defect, unfellable] })), 'defects');
    assert.equal(row.open, 1, 'a defect without a runnable check stays open');
    assert.equal(row.items.find((i) => i.id === 'D-Y').status, 'not-fellable');
  } finally { cleanup(red, green); }
});

test('experiments tally: an env-gated opt-in is open until its gate is gone', () => {
  const exp = {
    id: 'E-X',
    summary: 'default-off loop',
    probe: 'phrase',
    check: [{ path: ['commands/*.md', 'lib/**/*.mjs'], pattern: 'LOOP_ENABLED', expect: 'match' }],
  };
  const base = { 'STATE.md': '## Open decisions\n', 'agents/a.md': 'x\n', 'commands/r.md': 'Launch `a`\n' };
  const red = fixture({ ...base, 'lib/util/cap.mjs': 'if (process.env.LOOP_ENABLED) {}\n' });
  const green = fixture({ ...base, 'lib/util/cap.mjs': 'export const x = 1;\n' });
  try {
    assert.equal(rowById(measure(red, registry({ experiments: [exp] })), 'experiments').open, 1);
    assert.equal(rowById(measure(green, registry({ experiments: [exp] })), 'experiments').open, 0);
  } finally { cleanup(red, green); }
});

test('dormant-agents tally: an agent no command spawns counts; reference docs never do', () => {
  const files = {
    'STATE.md': '## Open decisions\n',
    'agents/used-agent.md': '---\nname: used-agent\ndescription: |\n  does work\n---\n',
    'agents/idle-agent.md': '---\nname: idle-agent\ndescription: |\n  never wired\n---\n',
    'agents/some-orchestrator.md': '---\nname: some-orchestrator\ndescription: Reference document, not a spawnable capability — docs\n---\n',
    'commands/run.md': 'Launch the **used-agent** agent.\n',
  };
  const red = fixture(files);
  const green = fixture({ ...files, 'commands/other.md': 'Spawn `idle-agent` in parallel.\n' });
  try {
    let row = rowById(measure(red, registry()), 'dormant-agents');
    assert.equal(row.open, 1);
    assert.equal(row.total, 2, 'denominator = spawnable agents (reference docs excluded)');
    assert.deepEqual(row.items.filter((i) => i.status === 'open').map((i) => i.id), ['idle-agent']);
    row = rowById(measure(green, registry()), 'dormant-agents');
    assert.equal(row.open, 0);
  } finally { cleanup(red, green); }
});

test('dormant-agents tally: a prose sentence or an HTML comment does not wake a dormant agent', () => {
  const files = {
    'STATE.md': '## Open decisions\n',
    'agents/idle-agent.md': '---\nname: idle-agent\ndescription: |\n  never wired\n---\n',
    'commands/plan.md': 'The idle-agent is dormant and is never spawned.\n',
    'commands/end.md': '<!-- idle-agent -->\nThe research-idle-agents phase.\n',
  };
  const dir = fixture(files);
  try {
    assert.equal(rowById(measure(dir, registry()), 'dormant-agents').open, 1);
  } finally { cleanup(dir); }
});

test('dormant-agents tally: an unmeasurable agents dir is n/a (null), never 0', () => {
  const dir = fixture({ 'STATE.md': '## Open decisions\n', 'commands/r.md': 'x\n' });
  try {
    const result = measure(dir, registry());
    const row = rowById(result, 'dormant-agents');
    assert.equal(row.open, null);
    assert.equal(row.total, null);
    assert.match(row.detail, /not measurable/);
    assert.equal(result.green, false);
  } finally { cleanup(dir); }
});

test('decisions tally: counts open markers inside the section only, and says it counts ticks', () => {
  const state = [
    '# STATE',
    '- [ ] outside the section, ignored',
    '## Open decisions',
    '- [ ] first open',
    '- [x] already decided',
    '- [ ] second open',
    '## Next section',
    '- [ ] also ignored',
    '',
  ].join('\n');
  const red = fixture({ 'STATE.md': state, 'agents/a.md': 'x\n', 'commands/r.md': 'Launch `a`\n' });
  const green = fixture({
    'STATE.md': '## Open decisions\n- [x] done\n## Next\n',
    'agents/a.md': 'x\n',
    'commands/r.md': 'Launch `a`\n',
  });
  try {
    let row = rowById(measure(red, registry()), 'decisions');
    assert.equal(row.open, 2);
    assert.equal(row.total, 3);
    assert.match(row.detail, /tick/i, 'the output must say a tick is not verified as a decision');
    row = rowById(measure(green, registry()), 'decisions');
    assert.equal(row.open, 0);
    assert.equal(row.total, 1);
  } finally { cleanup(red, green); }
});

test('decisions tally: a missing STATE.md or section is NOT MEASURABLE (null), never 0', () => {
  const noState = fixture({ 'agents/a.md': 'x\n', 'commands/r.md': 'Launch `a`\n' });
  const noSection = fixture({ 'STATE.md': '# STATE\n- [ ] x\n', 'agents/a.md': 'x\n', 'commands/r.md': 'Launch `a`\n' });
  try {
    for (const dir of [noState, noSection]) {
      const result = measure(dir, registry());
      const row = rowById(result, 'decisions');
      assert.equal(row.open, null);
      assert.ok(row.detail.length > 0, 'the reason is reported');
      assert.equal(result.green, false, 'an unmeasurable tally keeps the gate red');
    }
  } finally { cleanup(noState, noSection); }
});

test('decisions tally: an unmarked list item in the section is format drift → NOT MEASURABLE', () => {
  // A STATE written without the marker convention must not read as "0 open".
  for (const item of ['1. **Some decision?** prose', '- plain bullet decision', '* star bullet']) {
    const dir = fixture({
      'STATE.md': `## Open decisions\n- [ ] marked\n${item}\n## Next\n`,
      'agents/a.md': 'x\n',
      'commands/r.md': 'Launch `a`\n',
    });
    try {
      const row = rowById(measure(dir, registry()), 'decisions');
      assert.equal(row.open, null, `unmarked "${item}" must make the tally unmeasurable`);
      assert.match(row.detail, /unmarked/);
    } finally { cleanup(dir); }
  }
});

test('feat-after-freeze tally: not a git repo → n/a (red), never 0', () => {
  const dir = fixture({ 'STATE.md': '## Open decisions\n' });
  try {
    const result = measure(dir, registry());
    const row = rowById(result, 'feat-after-freeze');
    assert.equal(row.open, null);
    assert.match(row.detail, /not measured/);
    assert.equal(result.green, false);
  } finally { cleanup(dir); }
});

test('feat-after-freeze tally: no freeze tag yet → n/a (red), and the detail names the tag', () => {
  const dir = fixture({ 'STATE.md': '## Open decisions\n' });
  try {
    gitInit(dir);
    const row = rowById(measure(dir, registry()), 'feat-after-freeze');
    assert.equal(row.open, null);
    assert.match(row.detail, /end-state-freeze/);
  } finally { cleanup(dir); }
});

test('feat-after-freeze tally: counts feat commits after the tag, 0 when there are none', () => {
  const dir = fixture({ 'STATE.md': '## Open decisions\n' });
  try {
    gitInit(dir);
    gitCommit(dir, 'feat: before the freeze does not count');
    git(dir, 'tag', 'end-state-freeze');
    let row = rowById(measure(dir, registry()), 'feat-after-freeze');
    assert.equal(row.open, 0);
    assert.equal(row.total, 0);
    gitCommit(dir, 'fix(x): a defect fix is allowed');
    gitCommit(dir, 'feature: not a conventional feat');
    row = rowById(measure(dir, registry()), 'feat-after-freeze');
    assert.equal(row.open, 0);
    assert.equal(row.total, 2);
    gitCommit(dir, 'feat(research): a new capability');
    gitCommit(dir, 'feat!: a breaking capability');
    row = rowById(measure(dir, registry()), 'feat-after-freeze');
    assert.equal(row.open, 2);
    assert.equal(row.total, 4);
  } finally { cleanup(dir); }
});

// --- registry integrity (the judged party must not own the ledger) ---------

const SAMPLE = registry({
  defects: [
    { id: 'D-01', summary: 'first defect', probe: 'phrase', check: [{ path: 'a.md', pattern: 'bad', expect: 'match' }] },
    { id: 'D-02', summary: 'second defect', probe: 'phrase', check: [{ path: 'a.md', pattern: 'worse', expect: 'match' }] },
  ],
  experiments: [
    { id: 'E-01', summary: 'first experiment', probe: 'phrase', check: [{ path: 'a.md', pattern: 'FLAG', expect: 'match' }] },
    { id: 'E-02', summary: 'second experiment', probe: 'phrase', check: [{ path: 'a.md', pattern: 'OPT', expect: 'match' }] },
  ],
});
const clone = (v) => JSON.parse(JSON.stringify(v));

test('verifyIntegrity: the frozen registry itself is intact; a new entry may be added', () => {
  const frozen = frozenFor(SAMPLE);
  assert.deepEqual(verifyIntegrity(SAMPLE, frozen), { ok: true, violations: [] });
  const grown = clone(SAMPLE);
  grown.defects.push({ id: 'D-03', summary: 'found later', probe: 'phrase', check: [{ path: 'a.md', pattern: 'new', expect: 'match' }] });
  assert.equal(verifyIntegrity(grown, frozen).ok, true);
});

test('verifyIntegrity: every registry attack is a violation that names what moved', () => {
  const frozen = frozenFor(SAMPLE);
  const attacks = {
    'delete a defect': (r) => { r.defects = r.defects.filter((d) => d.id !== 'D-02'); },
    'delete an experiment': (r) => { r.experiments = r.experiments.filter((e) => e.id !== 'E-01'); },
    'weaken a defect check': (r) => { r.defects[0].check[0].pattern = '^NEVER MATCHES$'; },
    'weaken an experiment check': (r) => { r.experiments[1].check[0].expect = 'no-match'; },
    'drop a condition': (r) => { r.defects[0].check = []; },
    'point spawnSites at agents': (r) => { r.agents = { ...r.agents, spawnSites: 'agents/*.md' }; },
    'change the reference marker': (r) => { r.agents = { ...r.agents, referenceMarker: 'DORMANT' }; },
    'move the decisions section': (r) => { r.decisions = { ...r.decisions, section: '## Elsewhere' }; },
    'change the open marker': (r) => { r.decisions = { ...r.decisions, open: '^NEVER' }; },
    'rename the freeze tag': (r) => { r.freeze = { ...r.freeze, tag: 'some-future-tag' }; },
    'duplicate an id': (r) => { r.defects.push(clone(r.defects[0])); },
  };
  for (const [name, attack] of Object.entries(attacks)) {
    const reg = clone(SAMPLE);
    attack(reg);
    const v = verifyIntegrity(reg, frozen);
    assert.equal(v.ok, false, `${name} must be caught`);
    assert.ok(v.violations.length > 0 && v.violations.every((s) => typeof s === 'string' && s.length > 0), name);
  }
});

test('verifyIntegrity: spawnSites may never include agents/, even if the manifest says so', () => {
  const reg = clone(SAMPLE);
  reg.agents = { ...reg.agents, spawnSites: 'agents/*.md' };
  const v = verifyIntegrity(reg, frozenFor(reg));
  assert.equal(v.ok, false);
  assert.ok(v.violations.some((s) => /agents\//.test(s)));
});

test('checkSignature: key order does not matter; every field of a condition does', () => {
  const a = [{ path: 'a.md', pattern: 'x', flags: 'm', expect: 'match' }];
  const reordered = [{ expect: 'match', flags: 'm', pattern: 'x', path: 'a.md' }];
  assert.equal(checkSignature(a), checkSignature(reordered));
  for (const change of [{ path: 'b.md' }, { pattern: 'y' }, { flags: '' }, { expect: 'no-match' }, { section: '## 1.' }]) {
    assert.notEqual(checkSignature([{ ...a[0], ...change }]), checkSignature(a), JSON.stringify(change));
  }
  assert.match(checkSignature(a), /^[0-9a-f]{64}$/);
});

test('measure: a missing frozen manifest makes integrity n/a and keeps the gate red', () => {
  const dir = fixture({ 'STATE.md': '## Open decisions\n' });
  try {
    const result = measure(dir, registry());
    assert.equal(result.integrity.ok, null);
    assert.match(result.integrity.detail, /end-state-frozen\.json/);
    assert.equal(result.green, false);
  } finally { cleanup(dir); }
});

// --- render ----------------------------------------------------------------

test('render: the header counts only tallies that ARE 0, never n/a ones', () => {
  const result = {
    green: false,
    integrity: { ok: true, violations: [], detail: '' },
    rows: [
      { id: 'defects', label: 'l', source: 's', open: 0, total: 1, target: 0, items: [], detail: '' },
      { id: 'experiments', label: 'l', source: 's', open: null, total: null, target: 0, items: [], detail: 'not measurable: x' },
      { id: 'dormant-agents', label: 'l', source: 's', open: 0, total: 3, target: 0, items: [], detail: '' },
    ],
  };
  const text = render(result);
  assert.match(text, /RED \(2 of 3 tallies at 0\)/);
  assert.match(text, /\| experiments \| n\/a \| n\/a \|/);
});

test('render: open phrase probes are labelled, closed ids are listed, integrity is shown', () => {
  const result = {
    green: false,
    integrity: { ok: false, violations: ['D-02 removed from the registry'], detail: '' },
    rows: [{
      id: 'defects', label: 'open pipeline defects', source: 's', open: 1, total: 2, target: 0, detail: '',
      items: [
        { id: 'D-01', summary: 'still open', probe: 'phrase', status: 'open', detail: '' },
        { id: 'D-06', summary: 'fixed', probe: 'byte', status: 'closed', detail: '' },
      ],
    }],
  };
  const text = render(result);
  assert.match(text, /\[open · phrase probe\] D-01/);
  assert.match(text, /closed: D-06/);
  assert.match(text, /registry integrity: VIOLATED/);
  assert.match(text, /D-02 removed from the registry/);
});

// --- CLI -------------------------------------------------------------------

function writeGateFiles(dir, reg, frozen = frozenFor(reg)) {
  mkdirSync(join(dir, 'scripts'), { recursive: true });
  writeFileSync(join(dir, 'scripts', 'end-state-registry.json'), JSON.stringify(reg, null, 2));
  mkdirSync(join(dir, 'tests', 'fixtures'), { recursive: true });
  writeFileSync(join(dir, 'tests', 'fixtures', 'end-state-frozen.json'), JSON.stringify(frozen, null, 2));
}

function runGate(dir, extra = []) {
  return spawnSync(process.execPath, [GATE, '--root', dir, ...extra], { encoding: 'utf8' });
}

const ALL_IDS = ['defects', 'experiments', 'dormant-agents', 'decisions', 'feat-after-freeze'];

test('CLI: all five tallies at 0 with an intact registry → green, exit 0; --json carries the rows', () => {
  const dir = fixture({
    'STATE.md': '## Open decisions\n- [x] done\n',
    'agents/a.md': '---\nname: a\n---\n',
    'commands/r.md': 'Spawn `a`\n',
  });
  try {
    writeGateFiles(dir, registry());
    gitInit(dir);
    git(dir, 'tag', 'end-state-freeze');
    const r = runGate(dir, ['--json']);
    assert.equal(r.status, 0, r.stdout + r.stderr);
    const out = JSON.parse(r.stdout);
    assert.equal(out.green, true);
    assert.equal(out.integrity.ok, true);
    assert.deepEqual(out.rows.map((x) => x.id), ALL_IDS);
    assert.ok(out.rows.every((x) => x.open === 0 && x.target === 0 && typeof x.source === 'string'));
  } finally { cleanup(dir); }
});

test('CLI: an intact registry with every measurable tally at 0 but no freeze tag → red, exit 1', () => {
  // n/a must never be read as 0 — also when nothing else is wrong.
  const dir = fixture({
    'STATE.md': '## Open decisions\n- [x] done\n',
    'agents/a.md': '---\nname: a\n---\n',
    'commands/r.md': 'Spawn `a`\n',
  });
  try {
    writeGateFiles(dir, registry());
    gitInit(dir);
    const r = runGate(dir, ['--json']);
    assert.equal(r.status, 1, r.stdout + r.stderr);
    const out = JSON.parse(r.stdout);
    assert.equal(out.integrity.ok, true);
    assert.equal(out.green, false);
    assert.equal(out.rows.find((x) => x.id === 'feat-after-freeze').open, null);
    assert.ok(out.rows.filter((x) => x.id !== 'feat-after-freeze').every((x) => x.open === 0));
  } finally { cleanup(dir); }
});

test('CLI: all tallies at 0 but a tampered registry → red, exit 1 (the combined green attack)', () => {
  const dir = fixture({
    'STATE.md': '## Open decisions\n- [x] ticked\n',
    'agents/a.md': '---\nname: a\n---\n',
    'commands/r.md': 'Spawn `a`\n',
  });
  try {
    const honest = registry({ defects: [{ id: 'D-01', summary: 'a real defect', probe: 'phrase', check: [{ path: 'commands/r.md', pattern: 'Spawn', expect: 'match' }] }] });
    const tampered = registry(); // the open defect simply left the ledger
    writeGateFiles(dir, tampered, frozenFor(honest));
    gitInit(dir);
    git(dir, 'tag', 'end-state-freeze');
    const r = runGate(dir);
    assert.equal(r.status, 1, r.stdout + r.stderr);
    assert.match(r.stdout, /RED/);
    assert.match(r.stdout, /VIOLATED/);
    assert.match(r.stdout, /D-01/);
  } finally { cleanup(dir); }
});

test('CLI: any tally > 0 → red, exit 1; the table names every row', () => {
  const dir = fixture({
    'STATE.md': '## Open decisions\n- [ ] undecided\n',
    'agents/a.md': '---\nname: a\n---\n',
    'commands/r.md': 'Spawn `a`\n',
  });
  try {
    writeGateFiles(dir, registry());
    const r = runGate(dir);
    assert.equal(r.status, 1, r.stderr);
    for (const label of ALL_IDS) assert.match(r.stdout, new RegExp(label));
    assert.match(r.stdout, /RED/);
  } finally { cleanup(dir); }
});

test('CLI: an unreadable registry is a usage error (exit 2), not a verdict', () => {
  const dir = fixture({ 'STATE.md': '## Open decisions\n' });
  try {
    const r = runGate(dir);
    assert.equal(r.status, 2);
    assert.match(r.stderr, /end-state-registry\.json/);
  } finally { cleanup(dir); }
});

// --- the real repo: denominator pinned, state never pinned -----------------

test('the frozen denominator: tests/fixtures/end-state-frozen.json is exactly the literal above', () => {
  const file = loadFrozen(ROOT);
  const { why, ...rest } = file;
  assert.ok(typeof why === 'string' && why.length > 20, 'the manifest says why it is frozen');
  assert.deepEqual(rest, FROZEN);
});

test('the frozen denominator: the real registry is intact against it', () => {
  const v = verifyIntegrity(loadRegistry(ROOT), FROZEN);
  assert.deepEqual(v, { ok: true, violations: [] }, v.violations.join('\n'));
});

test('real registry: every counted entry has an id, a summary, a probe kind and a check that RUNS here', () => {
  const reg = loadRegistry(ROOT);
  const entries = [...reg.defects, ...reg.experiments];
  const ids = new Set();
  for (const e of entries) {
    assert.match(e.id, /^[DE]-\d{2}$/, `bad id ${e.id}`);
    assert.ok(!ids.has(e.id), `duplicate id ${e.id}`);
    ids.add(e.id);
    assert.ok(typeof e.summary === 'string' && e.summary.length > 10, `${e.id} needs a summary`);
    assert.ok(['phrase', 'byte'].includes(e.probe), `${e.id} must declare its probe kind`);
    // A check that cannot evaluate against this very repo is a typo, not a finding.
    assert.notEqual(evaluateCheck(ROOT, e.check).status, 'not-fellable', `${e.id} check does not run here`);
  }
});

test('real repo: five rows, open is a count or null, exit code agrees with rows + integrity', () => {
  const r = spawnSync(process.execPath, [GATE, '--json'], { encoding: 'utf8', cwd: ROOT });
  assert.ok(r.status === 0 || r.status === 1, r.stderr);
  const out = JSON.parse(r.stdout);
  assert.deepEqual(out.rows.map((x) => x.id), ALL_IDS);
  for (const row of out.rows) {
    assert.ok(row.open === null || (Number.isInteger(row.open) && row.open >= 0), `${row.id}: ${row.open}`);
  }
  const green = out.rows.every((row) => row.open === 0) && out.integrity.ok === true;
  assert.equal(out.green, green);
  assert.equal(r.status, green ? 0 : 1);
  assert.ok(existsSync(join(ROOT, 'scripts', 'end-state-registry.json')));
  assert.ok(readFileSync(join(ROOT, 'tests', 'fixtures', 'end-state-frozen.json'), 'utf8').length > 0);
});