voyage/tests/lib/agent-frontmatter.test.mjs

// tests/lib/agent-frontmatter.test.mjs
// Pin the agent-frontmatter contract from Steps 1-3 of plan-v2:
//   every agents/*.md MUST declare:
//     - model:   (one of opus | sonnet | haiku)
//     - tools:   (allowlist) OR disallowedTools: (denylist), at least one
// No agent includes the `Agent` tool (orchestration runs in the session).
//
// When this test fails, fix the agent file — do NOT relax the assertion to
// hide drift. The contract is what /trek* commands rely on for
// disciplined model selection + tool scoping.

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { readFileSync, readdirSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';

const HERE = dirname(fileURLToPath(import.meta.url));
const ROOT = join(HERE, '..', '..');
const AGENTS_DIR = join(ROOT, 'agents');

const ALLOWED_MODELS = new Set(['opus', 'sonnet', 'haiku']);

function read(rel) {
  return readFileSync(join(ROOT, rel), 'utf-8');
}

function extractFrontmatter(text) {
  const m = text.match(/^---\r?\n([\s\S]*?)\r?\n---/);
  return m ? m[1] : null;
}

function hasTopLevelKey(fm, key) {
  return new RegExp(`^${key}\\s*:`, 'm').test(fm);
}

function getTopLevelValue(fm, key) {
  const m = fm.match(new RegExp(`^${key}\\s*:\\s*(.+?)\\s*$`, 'm'));
  return m ? m[1] : null;
}

const agentFiles = readdirSync(AGENTS_DIR).filter(f => f.endsWith('.md'));

test('every agents/*.md declares a model: field', () => {
  assert.ok(agentFiles.length > 0, 'No agent files found under agents/');
  for (const f of agentFiles) {
    const fm = extractFrontmatter(read(`agents/${f}`));
    assert.ok(fm, `agents/${f}: missing YAML frontmatter block`);
    assert.ok(
      hasTopLevelKey(fm, 'model'),
      `agents/${f}: required \`model:\` field missing from frontmatter`,
    );
    const value = getTopLevelValue(fm, 'model');
    assert.ok(
      value && ALLOWED_MODELS.has(value),
      `agents/${f}: model: "${value}" must be one of ${[...ALLOWED_MODELS].join(' | ')}`,
    );
  }
});

test('every agents/*.md declares tools: or disallowedTools:', () => {
  for (const f of agentFiles) {
    const fm = extractFrontmatter(read(`agents/${f}`));
    assert.ok(fm, `agents/${f}: missing YAML frontmatter block`);
    assert.ok(
      hasTopLevelKey(fm, 'tools') || hasTopLevelKey(fm, 'disallowedTools'),
      `agents/${f}: required \`tools:\` (allowlist) or \`disallowedTools:\` (denylist) field missing`,
    );
  }
});

test('every agents/*.md frontmatter name matches its filename', () => {
  for (const f of agentFiles) {
    const fm = extractFrontmatter(read(`agents/${f}`));
    assert.ok(fm, `agents/${f}: missing frontmatter`);
    const expected = f.replace(/\.md$/, '');
    const value = getTopLevelValue(fm, 'name');
    assert.equal(
      value,
      expected,
      `agents/${f}: frontmatter name="${value}" should match filename "${expected}"`,
    );
  }
});

test('agents do NOT include the Agent tool (no recursive swarming)', () => {
  for (const f of agentFiles) {
    const fm = extractFrontmatter(read(`agents/${f}`));
    assert.ok(fm, `agents/${f}: missing frontmatter`);
    const tools = getTopLevelValue(fm, 'tools');
    if (tools === null) continue; // disallowedTools-only agent — fine
    assert.ok(
      !/\bAgent\b/.test(tools),
      `agents/${f}: must NOT include the Agent tool ` +
      `(orchestration runs in the session) — got tools: ${tools}`,
    );
  }
});

// M4 (v5.7.1): examples-relocation invariant. The 34 <example> blocks belong in
// agent BODIES, not in the always-loaded `description:` frontmatter (voyage
// launches its agents by name, so the auto-selection examples are cost without
// function there). This pins the migration: examples cannot regress into
// frontmatter, and cannot be silently lost during the move.
function bodyOf(text) {
  // Slice the file content AFTER the closing frontmatter `---`.
  // Do NOT split on /^---$/m — a horizontal rule in the body would mis-split.
  const m = text.match(/^---\r?\n[\s\S]*?\r?\n---\r?\n?/);
  return m ? text.slice(m[0].length) : text;
}

test('no agents/*.md frontmatter contains an <example> block (M4: examples live in the body)', () => {
  for (const f of agentFiles) {
    const fm = extractFrontmatter(read(`agents/${f}`));
    assert.ok(fm !== null, `agents/${f}: missing frontmatter`);
    assert.equal(
      (fm.match(/<example>/g) || []).length,
      0,
      `agents/${f}: <example> blocks must live in the body, not the always-loaded description: frontmatter (M4)`,
    );
  }
});

// Floor lowered 34 -> 32 in v5.10.1: `gemini-bridge` (2 examples) was DELETED as an
// agent by operator directive, not relocated. The pin guards M4's "relocation moves,
// never deletes" invariant, so it must move only when an agent legitimately leaves the
// inventory — never to absorb examples that went missing from a surviving agent.
test('agent bodies retain at least 32 <example> blocks (M4: relocation moves, never deletes)', () => {
  let total = 0;
  for (const f of agentFiles) {
    total += (bodyOf(read(`agents/${f}`)).match(/<example>/g) || []).length;
  }
  assert.ok(
    total >= 32,
    `expected >= 32 <example> blocks across agent bodies (16 agents x 2), got ${total} ` +
    `— examples may have been deleted instead of relocated (M4)`,
  );
});

// Operator rule (2026-10-05): "standard" is Opus 5.5 at reasoning effort High. A pinned
// `effort:` overrides the session level, so a pin below `high` runs that agent below the
// floor whatever the session is set to. Unpinned agents follow the session.
const EFFORT_FLOOR = new Set(['high', 'xhigh', 'max']);
const RETRIEVAL_AGENTS = ['architecture-mapper.md', 'dependency-tracer.md', 'git-historian.md', 'task-finder.md'];

test('no agents/*.md pins a reasoning effort below high', () => {
  const pinned = agentFiles
    .map((f) => [f, getTopLevelValue(extractFrontmatter(read(`agents/${f}`)) || '', 'effort')])
    .filter(([, v]) => v !== null);
  assert.ok(pinned.length > 0, 'no agent carries effort: - the check would prove nothing');
  const below = pinned.filter(([, v]) => !EFFORT_FLOOR.has(v)).map(([f, v]) => `agents/${f}: effort: ${v}`);
  assert.deepEqual(below, [], 'fix the agent file - the floor is the operator\'s rule');
});

test('the four retrieval agents pin effort: high', () => {
  for (const f of RETRIEVAL_AGENTS) {
    assert.equal(getTopLevelValue(extractFrontmatter(read(`agents/${f}`)), 'effort'), 'high', `agents/${f}`);
  }
});