test(#1971): consolidate 48 gsd-tools CLI regression tests into subcommand suites

Fold 48 issue-named gsd-tools CLI regression files into the canonical test file
that owns each subcommand subject (state, roadmap, phase, milestone, audit, config,
router/dispatch, stats, verify, health, etc.), preserving every assertion and its
origin issue number as provenance (block-scoped describe wrappers, 299 subtests
conserved 1:1). No monolithic gsd-tools.test.cjs created — routes into 18 existing
per-subject suites.

Removes 48 tests/ files. Regenerates regression-name allowlist (271->231), ratchets
the file-count allowlist across 6 buckets (audit/milestone/phase/roadmap/state/verify),
and makes 10 relocated allow-test-rule exemptions issue-ref-compliant (ADR-456; prunes
10 stale ids). Repoints one CONTEXT.md symptom ref and ADR-3524's parity-test ref.
lint:ci green.

Part of epic #1969. Closes #1971.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/state-prune.test.cjs

@@ -376,3 +376,90 @@ describe('#1776: prune reads the current phase only from ## Current Position', (
     );
   });
 });
+
+
+// ────────────────────────────────────────────────────────────────────────
+// Folded from tests/bug-1760-state-prune-noop-template-field.test.cjs — consolidation epic #1969 (B2 #1971)
+// ────────────────────────────────────────────────────────────────────────
+{
+  const { describe: __foldDescribe } = require('node:test');
+  __foldDescribe("folded:bug-1760-state-prune-noop-template-field (consolidation epic #1969 B2 #1971)", () => {
+'use strict';
+// Regression test for issue #1760 — `state prune` no-ops on template-conformant
+// STATE.md because it reads `Current Phase` only, never the `Phase: X of Y` line
+// the canonical template emits.
+//
+// ADR-1769 Phase 7 fix: derive the current phase with a `Phase` / `Current Phase`
+// fallback (mirroring buildStateFrontmatter), so prune engages on template STATE.md.
+
+const { describe, test, beforeEach, afterEach } = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+
+const { runGsdTools, createTempProject, cleanup } = require('./helpers.cjs');
+
+function writeStateMd(tmpDir, content) {
+  fs.writeFileSync(path.join(tmpDir, '.planning', 'STATE.md'), content);
+}
+
+describe('#1760: state prune engages on template-conformant STATE.md (Phase: X of Y)', () => {
+  let tmpDir;
+  beforeEach(() => { tmpDir = createTempProject(); });
+  afterEach(() => { cleanup(tmpDir); });
+
+  test('prune engages when STATE.md uses "Phase: N of M" (no Current Phase field)', () => {
+    // Template-conformant STATE.md: Current Position uses `Phase: 10 of 15`, and
+    // there is NO `**Current Phase:**` body field. Pre-fix this made prune bail
+    // with "Only 0 phases — nothing to prune".
+    writeStateMd(tmpDir, [
+      '# Session State',
+      '',
+      '## Current Position',
+      '',
+      'Phase: 10 of 15',
+      'Plan: 2 of 4',
+      'Status: Executing Phase 10',
+      '',
+      '## Decisions',
+      '',
+      '- [Phase 1]: Old decision',
+      '- [Phase 3]: Older decision',
+      '- [Phase 9]: Recent decision',
+      '',
+    ].join('\n'));
+
+    const result = runGsdTools('state prune --keep-recent 3 --dry-run', tmpDir);
+    assert.ok(result.success, `Command failed: ${result.error}`);
+    const out = JSON.parse(result.output);
+
+    // Pre-fix: { pruned: false, reason: 'Only 0 phases — nothing to prune...' }.
+    // Post-fix: prune engages and reports a real cutoff_phase (10 - 3 = 7).
+    assert.strictEqual(out.pruned, false, 'dry-run must report pruned:false');
+    assert.ok(out.reason === undefined || !/Only 0 phases/i.test(String(out.reason)),
+      `prune must not bail with "Only 0 phases" on template STATE.md; got reason=${JSON.stringify(out.reason)}`);
+    assert.strictEqual(out.cutoff_phase, 7,
+      `cutoff_phase must be 7 (current 10 - keep-recent 3); got ${JSON.stringify(out.cutoff_phase)}`);
+  });
+
+  test('prune still engages when "Current Phase:" IS present (no regression)', () => {
+    writeStateMd(tmpDir, [
+      '# Session State',
+      '',
+      '**Current Phase:** 10',
+      '',
+      '## Decisions',
+      '',
+      '- [Phase 1]: Old decision',
+      '- [Phase 9]: Recent decision',
+      '',
+    ].join('\n'));
+
+    const result = runGsdTools('state prune --keep-recent 3 --dry-run', tmpDir);
+    assert.ok(result.success, `Command failed: ${result.error}`);
+    const out = JSON.parse(result.output);
+    assert.strictEqual(out.cutoff_phase, 7);
+  });
+});
+  });
+}