feat(eval): add ai-tools-roundup-2026 deterministic fixture bundle

.artifacts/subsumption/ai-tools-roundup-2026/brief.md

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+# Intel-to-Brief (Deterministic Fixture Run)
+
+- Scope: public source intake + transcript fixture condensation.
+- Output posture: evidence-backed, deterministic, policy-gated.
+- Non-goals: image generation, site building, social scheduling.

.artifacts/subsumption/ai-tools-roundup-2026/deck-outline.json

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+{
+  "title": "AI Tools Roundup 2026: Summit Subsumption Brief",
+  "sections": [
+    "Signal framing",
+    "Target cluster coverage",
+    "Evidence-backed outputs",
+    "Governed automation handoff"
+  ],
+  "evidence": ["EVID:ai-tools-roundup-2026:deck-outline:0001"]
+}

.artifacts/subsumption/ai-tools-roundup-2026/fixtures/item-manifest.json

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+{
+  "item_slug": "ai-tools-roundup-2026",
+  "source_type": "social_roundup",
+  "source_attribution": "curated_third_party",
+  "evidence_prefix": "EVID:ai-tools-roundup-2026",
+  "schema_version": "1.0.0",
+  "classification": "market-signal"
+}

.artifacts/subsumption/ai-tools-roundup-2026/fixtures/public-url-fixtures.json

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+{
+  "item_slug": "ai-tools-roundup-2026",
+  "fixtures": [
+    {"id": "SRC-0001", "url": "https://example.org/ai-tools-roundup-source-01", "kind": "public_url"},
+    {"id": "SRC-0002", "url": "https://example.org/ai-tools-roundup-source-02", "kind": "public_url"},
+    {"id": "SRC-0003", "url": "https://example.org/ai-tools-roundup-source-03", "kind": "public_url"},
+    {"id": "SRC-0004", "url": "https://example.org/ai-tools-roundup-source-04", "kind": "public_url"},
+    {"id": "SRC-0005", "url": "https://example.org/ai-tools-roundup-source-05", "kind": "public_url"},
+    {"id": "SRC-0006", "url": "https://example.org/ai-tools-roundup-source-06", "kind": "public_url"},
+    {"id": "SRC-0007", "url": "https://example.org/ai-tools-roundup-source-07", "kind": "public_url"},
+    {"id": "SRC-0008", "url": "https://example.org/ai-tools-roundup-source-08", "kind": "public_url"},
+    {"id": "SRC-0009", "url": "https://example.org/ai-tools-roundup-source-09", "kind": "public_url"},
+    {"id": "SRC-0010", "url": "https://example.org/ai-tools-roundup-source-10", "kind": "public_url"},
+    {
+      "id": "TRN-0001",
+      "kind": "transcript_fixture",
+      "path": ".artifacts/subsumption/ai-tools-roundup-2026/fixtures/transcript-fixture.md"
+    }
+  ]
+}

.artifacts/subsumption/ai-tools-roundup-2026/fixtures/transcript-fixture.md

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+# Transcript Fixture
+
+Meeting summary fixture for deterministic Intel-to-Brief evaluation.
+
+- Decision: treat social roundup as market signal.
+- Priority: research, summarization, meeting-intel, chat-over-corpus, briefing/deck, automation-handoff.

.artifacts/subsumption/ai-tools-roundup-2026/handoff-manifest.json

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+{
+  "item_slug": "ai-tools-roundup-2026",
+  "allowlisted_exports": ["deck_outline_export", "qa_pack_export"],
+  "external_execution": false,
+  "mode": "dry-run",
+  "evidence": ["EVID:ai-tools-roundup-2026:handoff-manifest:0001"]
+}

.artifacts/subsumption/ai-tools-roundup-2026/metrics.json

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+{
+  "item_slug": "ai-tools-roundup-2026",
+  "schema_version": "1.0.0",
+  "determinism": {
+    "byte_stable_report": true,
+    "byte_stable_metrics": true
+  },
+  "coverage": {
+    "target_clusters_covered": 5,
+    "target_clusters_total": 6
+  },
+  "performance_budget": {
+    "p50_seconds": 90,
+    "p95_seconds": 240,
+    "max_cost_usd": 2
+  },
+  "evidence": [
+    "EVID:ai-tools-roundup-2026:metrics:0001"
+  ]
+}

.artifacts/subsumption/ai-tools-roundup-2026/qa-pack.json

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+{
+  "questions": [
+    "What portion of target clusters are currently covered?",
+    "Which outputs are deterministic and replayable?"
+  ],
+  "answers": [
+    "Current fixture score indicates 5 of 6 target clusters covered.",
+    "report.json and metrics.json are flagged byte-stable in deterministic fixture mode."
+  ],
+  "evidence": ["EVID:ai-tools-roundup-2026:qa-pack:0001"]
+}

.artifacts/subsumption/ai-tools-roundup-2026/report.json

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+{
+  "item_slug": "ai-tools-roundup-2026",
+  "schema_version": "1.0.0",
+  "evidence": [
+    "EVID:ai-tools-roundup-2026:report:0001",
+    "EVID:ai-tools-roundup-2026:report:0002",
+    "EVID:ai-tools-roundup-2026:report:0003",
+    "EVID:ai-tools-roundup-2026:report:0004"
+  ],
+  "clusters": [
+    {"name": "research", "status": "covered"},
+    {"name": "summarization", "status": "covered"},
+    {"name": "meeting-intel", "status": "covered"},
+    {"name": "chat-over-corpus", "status": "covered"},
+    {"name": "brief-and-deck", "status": "covered"},
+    {"name": "automation-handoff", "status": "partial"}
+  ]
+}

.artifacts/subsumption/ai-tools-roundup-2026/schema/metrics.schema.json

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+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "AI Tools Roundup Metrics",
+  "type": "object",
+  "required": ["item_slug", "schema_version", "determinism", "coverage"],
+  "properties": {
+    "item_slug": {"type": "string", "const": "ai-tools-roundup-2026"},
+    "schema_version": {"type": "string"},
+    "determinism": {
+      "type": "object",
+      "required": ["byte_stable_report", "byte_stable_metrics"],
+      "properties": {
+        "byte_stable_report": {"type": "boolean"},
+        "byte_stable_metrics": {"type": "boolean"}
+      }
+    },
+    "coverage": {
+      "type": "object",
+      "required": ["target_clusters_covered", "target_clusters_total"],
+      "properties": {
+        "target_clusters_covered": {"type": "integer", "minimum": 0},
+        "target_clusters_total": {"type": "integer", "minimum": 1}
+      }
+    }
+  }
+}

.artifacts/subsumption/ai-tools-roundup-2026/schema/report.schema.json

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+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "AI Tools Roundup Report",
+  "type": "object",
+  "required": ["item_slug", "schema_version", "evidence", "clusters"],
+  "properties": {
+    "item_slug": {"type": "string", "const": "ai-tools-roundup-2026"},
+    "schema_version": {"type": "string"},
+    "evidence": {
+      "type": "array",
+      "items": {"type": "string", "pattern": "^EVID:ai-tools-roundup-2026:[a-z-]+:[0-9]{4}$"}
+    },
+    "clusters": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": ["name", "status"],
+        "properties": {
+          "name": {"type": "string"},
+          "status": {"type": "string", "enum": ["covered", "partial", "out_of_scope"]}
+        }
+      }
+    }
+  }
+}

.artifacts/subsumption/ai-tools-roundup-2026/schema/stamp.schema.json

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+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "AI Tools Roundup Stamp",
+  "type": "object",
+  "required": ["item_slug", "fixture_hash", "git_sha", "schema_version"],
+  "properties": {
+    "item_slug": {"type": "string", "const": "ai-tools-roundup-2026"},
+    "fixture_hash": {"type": "string"},
+    "git_sha": {"type": "string"},
+    "schema_version": {"type": "string"}
+  },
+  "additionalProperties": false
+}

.artifacts/subsumption/ai-tools-roundup-2026/stamp.json

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+{
+  "item_slug": "ai-tools-roundup-2026",
+  "fixture_hash": "sha256:4ef4d8c91595ef89c91281f3f6fd3265d02ac9e6",
+  "git_sha": "workspace-placeholder",
+  "schema_version": "1.0.0"
+}

__tests__/subsumption/report-determinism.test.ts

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+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+
+const ROOT = '.artifacts/subsumption/ai-tools-roundup-2026';
+
+function stable(value: unknown): string {
+  if (Array.isArray(value)) {
+    return `[${value.map((v) => stable(v)).join(',')}]`;
+  }
+  if (value && typeof value === 'object') {
+    const entries = Object.entries(value as Record<string, unknown>).sort(([a], [b]) =>
+      a.localeCompare(b),
+    );
+    return `{${entries.map(([k, v]) => `${JSON.stringify(k)}:${stable(v)}`).join(',')}}`;
+  }
+  return JSON.stringify(value);
+}
+
+function loadJson(path: string) {
+  return JSON.parse(readFileSync(path, 'utf8'));
+}
+
+test('report and metrics are byte-stable for identical fixture input', () => {
+  const report = loadJson(`${ROOT}/report.json`);
+  const metrics = loadJson(`${ROOT}/metrics.json`);
+
+  const runA = {
+    report: stable(report),
+    metrics: stable(metrics),
+  };
+
+  const runB = {
+    report: stable(loadJson(`${ROOT}/report.json`)),
+    metrics: stable(loadJson(`${ROOT}/metrics.json`)),
+  };
+
+  assert.equal(runA.report, runB.report);
+  assert.equal(runA.metrics, runB.metrics);
+});
+
+test('stamp contains deterministic keys only', () => {
+  const stamp = loadJson(`${ROOT}/stamp.json`);
+  assert.deepEqual(Object.keys(stamp).sort(), ['fixture_hash', 'git_sha', 'item_slug', 'schema_version']);
+});