diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 63c0acea..8006b7ca 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -50,6 +50,7 @@ jobs:
         run: pip install tox
 
       - name: Run tests (via tox)
+        id: tests
         run: tox -e ci
 
       # Posts a check annotation + PR comment showing pass/fail counts.
@@ -63,6 +64,20 @@ jobs:
           comment_title: "Test Results"
           report_individual_runs: true
 
+      - name: Enforce coverage floor (60%)
+        if: always() && steps.tests.outcome == 'success'
+        run: |
+          python -c "
+          import xml.etree.ElementTree as ET, sys
+          tree = ET.parse('reports/coverage.xml')
+          rate = float(tree.getroot().attrib['line-rate']) * 100
+          print(f'Coverage: {rate:.1f}%')
+          if rate < 60:
+              print(f'FAIL: Coverage {rate:.1f}% is below 60% floor')
+              sys.exit(1)
+          print('PASS: Coverage is above 60% floor')
+          "
+
       # Coverage report available as a downloadable artifact in the Actions tab
       - name: Upload coverage report
         uses: actions/upload-artifact@v4
diff --git a/config/moderation.yaml b/config/moderation.yaml
new file mode 100644
index 00000000..875e554d
--- /dev/null
+++ b/config/moderation.yaml
@@ -0,0 +1,107 @@
+# Content Moderation Profiles
+# Per-game moderation configuration for the AI narrator pipeline.
+#
+# Each profile defines:
+#   - vocabulary_whitelist: Game terms safe in context (won't trigger moderation)
+#   - context_prompt: System prompt framing for the narrator
+#   - threshold: Confidence threshold — flags below this pass through
+#   - fallbacks: Pre-generated safe narration by scene type
+#
+# Model options (from research):
+#   llama-guard3:1b  — Speed (<30ms/sentence, INT4 quantized)
+#   shieldgemma:2b   — Accuracy (+10.8% AU-PRC, ~50-100ms)
+#
+# Override guard model via MODERATION_GUARD_MODEL env var.
+
+# ── Guard model selection ────────────────────────────────────────────────────
+guard_model: "llama-guard3:1b"
+
+# ── Streaming disclosure notes ───────────────────────────────────────────────
+# YouTube: Use "Altered or synthetic content" toggle
+# Twitch: Standard community guidelines (no specific AI disclosure req as of 2026-03)
+
+# ── Game Profiles ────────────────────────────────────────────────────────────
+profiles:
+
+  morrowind:
+    display_name: "The Elder Scrolls III: Morrowind"
+    threshold: 0.85
+    vocabulary_whitelist:
+      - Skooma
+      - Moon Sugar
+      - slave
+      - slavery
+      - Morag Tong
+      - Dark Brotherhood
+      - Telvanni
+      - Camonna Tong
+      - smuggler
+      - assassin
+      - Sixth House
+      - Corprus
+      - Dagoth Ur
+      - Nerevarine
+      - Balmora
+      - Vivec
+      - Almsivi
+      - Ordinators
+      - Ashlanders
+      - outlander
+      - N'wah
+    context_prompt: >
+      You are narrating gameplay of The Elder Scrolls III: Morrowind.
+      Morrowind contains mature themes including slavery, drug use
+      (Skooma/Moon Sugar), assassin guilds (Morag Tong, Dark Brotherhood),
+      and political intrigue. Treat these as game mechanics and historical
+      worldbuilding within the game's fictional universe. Never editorialize
+      on real-world parallels. Narrate events neutrally as a game
+      commentator would.
+    fallbacks:
+      combat: "The battle rages on in the ashlands of Vvardenfell."
+      dialogue: "The conversation continues between the characters."
+      exploration: "The Nerevarine presses onward through the landscape."
+      quest: "The quest unfolds as the hero navigates Morrowind's politics."
+      default: "The adventure continues in Morrowind."
+
+  skyrim:
+    display_name: "The Elder Scrolls V: Skyrim"
+    threshold: 0.85
+    vocabulary_whitelist:
+      - Skooma
+      - Dark Brotherhood
+      - Thieves Guild
+      - Stormcloak
+      - Imperial
+      - Dragonborn
+      - Dovahkiin
+      - Daedra
+      - Thalmor
+      - bandit
+      - assassin
+      - Forsworn
+      - necromancer
+    context_prompt: >
+      You are narrating gameplay of The Elder Scrolls V: Skyrim.
+      Skyrim features civil war, thieves guilds, assassin organizations,
+      and fantasy violence. Treat all content as in-game fiction.
+      Never draw real-world parallels. Narrate as a neutral game
+      commentator.
+    fallbacks:
+      combat: "Steel clashes as the battle continues in the wilds of Skyrim."
+      dialogue: "The conversation plays out in the cold northern land."
+      exploration: "The Dragonborn ventures further into the province."
+      default: "The adventure continues in Skyrim."
+
+  default:
+    display_name: "Generic Game"
+    threshold: 0.80
+    vocabulary_whitelist: []
+    context_prompt: >
+      You are narrating gameplay. Describe in-game events as a neutral
+      game commentator. Never reference real-world violence, politics,
+      or controversial topics. Stay focused on game mechanics and story.
+    fallbacks:
+      combat: "The action continues on screen."
+      dialogue: "The conversation unfolds between characters."
+      exploration: "The player explores the game world."
+      default: "The gameplay continues."
diff --git a/docs/research/integration-architecture-deep-dives.md b/docs/research/integration-architecture-deep-dives.md
new file mode 100644
index 00000000..f23a62e4
--- /dev/null
+++ b/docs/research/integration-architecture-deep-dives.md
@@ -0,0 +1,74 @@
+# Timmy Time Integration Architecture: Eight Deep Dives into Real Deployment
+
+> **Source:** PDF attached to issue #946, written during Veloren exploration phase.
+> Many patterns are game-agnostic and apply to the Morrowind/OpenClaw pivot.
+
+## Summary of Eight Deep Dives
+
+### 1. Veloren Client Sidecar (Game-Specific)
+- WebSocket JSON-line pattern for wrapping game clients
+- PyO3 direct binding infeasible; sidecar process wins
+- IPC latency negligible (~11us TCP, ~5us pipes) vs LLM inference
+- **Status:** Superseded by OpenMW Lua bridge (#964)
+
+### 2. Agno Ollama Tool Calling is Broken
+- Agno issues #2231, #2625, #1419, #1612, #4715 document persistent breakage
+- Root cause: Agno's Ollama model class doesn't robustly parse native tool_calls
+- **Fix:** Use Ollama's `format` parameter with Pydantic JSON schemas directly
+- Recommended models: qwen3-coder:32b (top), glm-4.7-flash, gpt-oss:20b
+- Critical settings: temperature 0.0-0.2, stream=False for tool calls
+- **Status:** Covered by #966 (three-tier router)
+
+### 3. MCP is the Right Abstraction
+- FastMCP averages 26.45ms per tool call (TM Dev Lab benchmark, Feb 2026)
+- Total MCP overhead per cycle: ~20-60ms (<3% of 2-second budget)
+- Agno has first-class bidirectional MCP integration (MCPTools, MultiMCPTools)
+- Use stdio transport for near-zero latency; return compressed JPEG not base64
+- **Status:** Covered by #984 (MCP restore)
+
+### 4. Human + AI Co-op Architecture (Game-Specific)
+- Headless client treated identically to graphical client by server
+- Leverages party system, trade API, and /tell for communication
+- Mode switching: solo autonomous play when human absent, assist when present
+- **Status:** Defer until after tutorial completion
+
+### 5. Real Latency Numbers
+- All-local M3 Max pipeline: 4-9 seconds per full cycle
+- Groq hybrid pipeline: 3-7 seconds per full cycle
+- VLM inference is 50-70% of total pipeline time (bottleneck)
+- Dual-model Ollama on 96GB M3 Max: ~11-14GB, ~70GB free
+- **Status:** Superseded by API-first perception (#963)
+
+### 6. Content Moderation (Three-Layer Defense)
+- Layer 1: Game-context system prompts (Morrowind themes as game mechanics)
+- Layer 2: Llama Guard 3 1B at <30ms/sentence for real-time filtering
+- Layer 3: Per-game moderation profiles with vocabulary whitelists
+- Run moderation + TTS preprocessing in parallel for zero added latency
+- Neuro-sama incident (Dec 2022) is the cautionary tale
+- **Status:** New issue created → #1056
+
+### 7. Model Selection (Qwen3-8B vs Hermes 3)
+- Three-role architecture: Perception (Qwen3-VL 8B), Decision (Qwen3-8B), Narration (Hermes 3 8B)
+- Qwen3-8B outperforms Qwen2.5-14B on 15 benchmarks
+- Hermes 3 best for narration (steerability, roleplaying)
+- Both use identical Hermes Function Calling standard
+- **Status:** Partially covered by #966 (three-tier router)
+
+### 8. Split Hetzner + Mac Deployment
+- Hetzner GEX44 (RTX 4000 SFF Ada, €184/month) for rendering/streaming
+- Mac M3 Max for all AI inference via Tailscale
+- Use FFmpeg x11grab + NVENC, not OBS (no headless support)
+- Use headless Xorg, not Xvfb (GPU access required for Vulkan)
+- Total cost: ~$200/month
+- **Status:** Referenced in #982 sprint plan
+
+## Cross-Reference to Active Issues
+
+| Research Topic | Active Issue | Status |
+|---------------|-------------|--------|
+| Pydantic structured output for Ollama | #966 (three-tier router) | In progress |
+| FastMCP tool server | #984 (MCP restore) | In progress |
+| Content moderation pipeline | #1056 (new) | Created from this research |
+| Split Hetzner + Mac deployment | #982 (sprint plan) | Referenced |
+| VLM latency / perception | #963 (perception bottleneck) | API-first approach |
+| OpenMW bridge (replaces Veloren sidecar) | #964 | In progress |
diff --git a/scripts/run_benchmarks.py b/scripts/run_benchmarks.py
new file mode 100644
index 00000000..c70ff0de
--- /dev/null
+++ b/scripts/run_benchmarks.py
@@ -0,0 +1,107 @@
+#!/usr/bin/env python3
+"""Run the agent performance regression benchmark suite.
+
+Usage::
+
+    python scripts/run_benchmarks.py                  # all scenarios
+    python scripts/run_benchmarks.py --tags navigation # filter by tag
+    python scripts/run_benchmarks.py --output results/benchmarks.jsonl
+    python scripts/run_benchmarks.py --compare results/benchmarks.jsonl
+
+Exit codes:
+    0 — all scenarios passed
+    1 — one or more scenarios failed
+"""
+
+from __future__ import annotations
+
+import argparse
+import asyncio
+import sys
+from pathlib import Path
+
+# Ensure src/ is on the path when invoked directly
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "src"))
+
+from infrastructure.world.benchmark.metrics import BenchmarkMetrics, load_history
+from infrastructure.world.benchmark.runner import BenchmarkRunner
+from infrastructure.world.benchmark.scenarios import load_scenarios
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="Agent performance regression benchmark suite",
+    )
+    parser.add_argument(
+        "--tags",
+        nargs="*",
+        default=None,
+        help="Filter scenarios by tag (e.g. navigation quest)",
+    )
+    parser.add_argument(
+        "--output",
+        type=Path,
+        default=None,
+        help="JSONL file to append results to",
+    )
+    parser.add_argument(
+        "--compare",
+        type=Path,
+        default=None,
+        help="JSONL file with baseline results for regression comparison",
+    )
+    return parser.parse_args()
+
+
+async def main() -> int:
+    args = parse_args()
+
+    scenarios = load_scenarios(tags=args.tags)
+    if not scenarios:
+        print("No matching scenarios found.")
+        return 1
+
+    print(f"Running {len(scenarios)} benchmark scenario(s)...\n")
+
+    runner = BenchmarkRunner()
+    metrics = await runner.run(scenarios)
+
+    print(metrics.summary())
+
+    if args.output:
+        metrics.save(args.output)
+
+    if args.compare:
+        history = load_history(args.compare)
+        if history:
+            from infrastructure.world.benchmark.metrics import compare_runs
+
+            # Reconstruct baseline from last recorded run
+            last = history[0]
+            baseline = BenchmarkMetrics(
+                timestamp=last.get("timestamp", ""),
+                commit_sha=last.get("commit_sha", ""),
+                total_time_ms=last.get("total_time_ms", 0),
+            )
+            for s in last.get("scenarios", []):
+                from infrastructure.world.benchmark.metrics import ScenarioResult
+
+                baseline.results.append(
+                    ScenarioResult(
+                        scenario_name=s["scenario_name"],
+                        success=s["success"],
+                        cycles_used=s["cycles_used"],
+                        max_cycles=s["max_cycles"],
+                        wall_time_ms=s.get("wall_time_ms", 0),
+                        llm_calls=s.get("llm_calls", 0),
+                        metabolic_cost=s.get("metabolic_cost", 0.0),
+                    )
+                )
+            print()
+            print(compare_runs(metrics, baseline))
+
+    return 0 if metrics.fail_count == 0 else 1
+
+
+if __name__ == "__main__":
+    sys.exit(asyncio.run(main()))
diff --git a/src/config.py b/src/config.py
index 62b46809..192c44e7 100644
--- a/src/config.py
+++ b/src/config.py
@@ -99,6 +99,14 @@ class Settings(BaseSettings):
     anthropic_api_key: str = ""
     claude_model: str = "haiku"
 
+    # ── Content Moderation ──────────────────────────────────────────────
+    # Three-layer moderation pipeline for AI narrator output.
+    # Uses Llama Guard via Ollama with regex fallback.
+    moderation_enabled: bool = True
+    moderation_guard_model: str = "llama-guard3:1b"
+    # Default confidence threshold — per-game profiles can override.
+    moderation_threshold: float = 0.8
+
     # ── Spark Intelligence ────────────────────────────────────────────────
     # Enable/disable the Spark cognitive layer.
     # When enabled, Spark captures swarm events, runs EIDOS predictions,
@@ -144,6 +152,10 @@ class Settings(BaseSettings):
     # Default is False (telemetry disabled) to align with sovereign AI vision.
     telemetry_enabled: bool = False
 
+    # ── Sovereignty Metrics ──────────────────────────────────────────────
+    # Alert when API cost per research task exceeds this threshold (USD).
+    sovereignty_api_cost_alert_threshold: float = 1.00
+
     # CORS allowed origins for the web chat interface (Gitea Pages, etc.)
     # Set CORS_ORIGINS as a comma-separated list, e.g. "http://localhost:3000,https://example.com"
     cors_origins: list[str] = [
diff --git a/src/dashboard/app.py b/src/dashboard/app.py
index 092daeb7..5ded70c6 100644
--- a/src/dashboard/app.py
+++ b/src/dashboard/app.py
@@ -45,6 +45,7 @@ from dashboard.routes.models import api_router as models_api_router
 from dashboard.routes.models import router as models_router
 from dashboard.routes.quests import router as quests_router
 from dashboard.routes.scorecards import router as scorecards_router
+from dashboard.routes.sovereignty_metrics import router as sovereignty_metrics_router
 from dashboard.routes.spark import router as spark_router
 from dashboard.routes.system import router as system_router
 from dashboard.routes.tasks import router as tasks_router
@@ -648,6 +649,7 @@ app.include_router(tower_router)
 app.include_router(daily_run_router)
 app.include_router(quests_router)
 app.include_router(scorecards_router)
+app.include_router(sovereignty_metrics_router)
 
 
 @app.websocket("/ws")
diff --git a/src/dashboard/routes/sovereignty_metrics.py b/src/dashboard/routes/sovereignty_metrics.py
new file mode 100644
index 00000000..3bffe95f
--- /dev/null
+++ b/src/dashboard/routes/sovereignty_metrics.py
@@ -0,0 +1,74 @@
+"""Sovereignty metrics dashboard routes.
+
+Provides API endpoints and HTMX partials for tracking research
+sovereignty progress against graduation targets.
+
+Refs: #981
+"""
+
+import logging
+from typing import Any
+
+from fastapi import APIRouter, Request
+from fastapi.responses import HTMLResponse
+
+from config import settings
+from dashboard.templating import templates
+from infrastructure.sovereignty_metrics import (
+    GRADUATION_TARGETS,
+    get_sovereignty_store,
+)
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/sovereignty", tags=["sovereignty"])
+
+
+@router.get("/metrics")
+async def sovereignty_metrics_api() -> dict[str, Any]:
+    """JSON API: full sovereignty metrics summary with trends."""
+    store = get_sovereignty_store()
+    summary = store.get_summary()
+    alerts = store.get_alerts(unacknowledged_only=True)
+    return {
+        "metrics": summary,
+        "alerts": alerts,
+        "targets": GRADUATION_TARGETS,
+        "cost_threshold": settings.sovereignty_api_cost_alert_threshold,
+    }
+
+
+@router.get("/metrics/panel", response_class=HTMLResponse)
+async def sovereignty_metrics_panel(request: Request) -> HTMLResponse:
+    """HTMX partial: sovereignty metrics progress panel."""
+    store = get_sovereignty_store()
+    summary = store.get_summary()
+    alerts = store.get_alerts(unacknowledged_only=True)
+
+    return templates.TemplateResponse(
+        request,
+        "partials/sovereignty_metrics.html",
+        {
+            "metrics": summary,
+            "alerts": alerts,
+            "targets": GRADUATION_TARGETS,
+        },
+    )
+
+
+@router.get("/alerts")
+async def sovereignty_alerts_api() -> dict[str, Any]:
+    """JSON API: sovereignty alerts."""
+    store = get_sovereignty_store()
+    return {
+        "alerts": store.get_alerts(unacknowledged_only=False),
+        "unacknowledged": store.get_alerts(unacknowledged_only=True),
+    }
+
+
+@router.post("/alerts/{alert_id}/acknowledge")
+async def acknowledge_alert(alert_id: int) -> dict[str, bool]:
+    """Acknowledge a sovereignty alert."""
+    store = get_sovereignty_store()
+    success = store.acknowledge_alert(alert_id)
+    return {"success": success}
diff --git a/src/dashboard/templates/mission_control.html b/src/dashboard/templates/mission_control.html
index 27acbd15..a090ff5b 100644
--- a/src/dashboard/templates/mission_control.html
+++ b/src/dashboard/templates/mission_control.html
@@ -179,6 +179,13 @@
   </div>
 </div>
 
+<!-- Sovereignty Metrics -->
+{% call panel("SOVEREIGNTY METRICS", id="sovereignty-metrics-panel",
+              hx_get="/sovereignty/metrics/panel",
+              hx_trigger="load, every 30s") %}
+  <p class="chat-history-placeholder">Loading sovereignty metrics...</p>
+{% endcall %}
+
 <!-- Chat History -->
 <div class="card mc-card-spaced">
     <div class="card-header">
diff --git a/src/dashboard/templates/partials/sovereignty_metrics.html b/src/dashboard/templates/partials/sovereignty_metrics.html
new file mode 100644
index 00000000..3ef004fc
--- /dev/null
+++ b/src/dashboard/templates/partials/sovereignty_metrics.html
@@ -0,0 +1,63 @@
+{# HTMX partial: Sovereignty Metrics Progress Panel
+   Loaded via hx-get="/sovereignty/metrics/panel"
+   Refs: #981
+#}
+{% set phase_labels = {"pre-start": "Pre-start", "week1": "Week 1", "month1": "Month 1", "month3": "Month 3", "graduated": "Graduated"} %}
+{% set phase_colors = {"pre-start": "var(--text-dim)", "week1": "var(--red)", "month1": "var(--amber)", "month3": "var(--green)", "graduated": "var(--purple)"} %}
+
+{% set metric_labels = {
+  "cache_hit_rate": "Cache Hit Rate",
+  "api_cost": "API Cost / Task",
+  "time_to_report": "Time to Report",
+  "human_involvement": "Human Involvement",
+  "local_artifacts": "Local Artifacts"
+} %}
+
+{% set metric_units = {
+  "cache_hit_rate": "%",
+  "api_cost": "$",
+  "time_to_report": "min",
+  "human_involvement": "%",
+  "local_artifacts": ""
+} %}
+
+{% if alerts %}
+<div class="sov-alerts">
+  {% for alert in alerts %}
+  <div class="sov-alert-item">
+    <span class="sov-alert-icon">!</span>
+    <span>{{ alert.message }}</span>
+  </div>
+  {% endfor %}
+</div>
+{% endif %}
+
+<div class="grid grid-3">
+{% for key, data in metrics.items() %}
+  {% set label = metric_labels.get(key, key) %}
+  {% set unit = metric_units.get(key, "") %}
+  {% set phase = data.phase %}
+  {% set color = phase_colors.get(phase, "var(--text-dim)") %}
+  <div class="stat">
+    <div class="stat-value" style="color: {{ color }}">
+      {% if data.current is not none %}
+        {% if key == "cache_hit_rate" or key == "human_involvement" %}
+          {{ "%.0f"|format(data.current * 100) }}{{ unit }}
+        {% elif key == "api_cost" %}
+          {{ unit }}{{ "%.2f"|format(data.current) }}
+        {% elif key == "time_to_report" %}
+          {{ "%.1f"|format(data.current) }}{{ unit }}
+        {% else %}
+          {{ data.current|int }}
+        {% endif %}
+      {% else %}
+        --
+      {% endif %}
+    </div>
+    <div class="stat-label">{{ label }}</div>
+    <div class="stat-label" style="font-size: 0.7rem; color: {{ color }}">
+      {{ phase_labels.get(phase, phase) }}
+    </div>
+  </div>
+{% endfor %}
+</div>
diff --git a/src/infrastructure/guards/__init__.py b/src/infrastructure/guards/__init__.py
new file mode 100644
index 00000000..c0dfe23f
--- /dev/null
+++ b/src/infrastructure/guards/__init__.py
@@ -0,0 +1,7 @@
+"""Content moderation pipeline for AI narrator output.
+
+Three-layer defense:
+1. Game-context system prompts (vocabulary whitelists, theme framing)
+2. Real-time output filter via Llama Guard (or fallback regex)
+3. Per-game moderation profiles with configurable thresholds
+"""
diff --git a/src/infrastructure/guards/moderation.py b/src/infrastructure/guards/moderation.py
new file mode 100644
index 00000000..7af53c24
--- /dev/null
+++ b/src/infrastructure/guards/moderation.py
@@ -0,0 +1,500 @@
+"""Content moderation pipeline for AI narrator output.
+
+Three-layer defense against harmful LLM output:
+
+Layer 1 — Game-context system prompts with per-game vocabulary whitelists.
+Layer 2 — Real-time output filter (Llama Guard via Ollama, regex fallback).
+Layer 3 — Per-game moderation profiles with configurable thresholds.
+
+Usage:
+    from infrastructure.guards.moderation import get_moderator
+
+    moderator = get_moderator()
+    result = await moderator.check("Some narrator text", game="morrowind")
+    if result.blocked:
+        use_fallback_narration(result.fallback)
+"""
+
+import logging
+import re
+import time
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+from enum import Enum
+from typing import Any
+
+from config import settings
+
+logger = logging.getLogger(__name__)
+
+
+class ModerationVerdict(Enum):
+    """Result of a moderation check."""
+
+    PASS = "pass"
+    FAIL = "fail"
+    ERROR = "error"
+
+
+class ViolationCategory(Enum):
+    """Categories of content violations."""
+
+    HATE_SPEECH = "hate_speech"
+    VIOLENCE_GLORIFICATION = "violence_glorification"
+    REAL_WORLD_HARM = "real_world_harm"
+    SEXUAL_CONTENT = "sexual_content"
+    SELF_HARM = "self_harm"
+    NONE = "none"
+
+
+@dataclass
+class ModerationResult:
+    """Result from the moderation pipeline."""
+
+    verdict: ModerationVerdict
+    blocked: bool
+    category: ViolationCategory = ViolationCategory.NONE
+    confidence: float = 0.0
+    latency_ms: float = 0.0
+    layer: str = ""  # Which layer caught it
+    fallback: str = ""  # Contextual fallback narration
+    reason: str = ""
+    timestamp: str = field(default_factory=lambda: datetime.now(UTC).isoformat())
+
+    @property
+    def passed(self) -> bool:
+        return self.verdict == ModerationVerdict.PASS
+
+
+@dataclass
+class GameProfile:
+    """Per-game moderation profile.
+
+    Defines vocabulary whitelists, theme framing rules,
+    and threshold tuning for a specific game.
+    """
+
+    game_id: str
+    display_name: str
+    # Terms that are safe in game context (e.g., "Skooma", "slave", "Morag Tong")
+    vocabulary_whitelist: list[str] = field(default_factory=list)
+    # System prompt additions for game-context framing
+    context_prompt: str = ""
+    # Confidence threshold — below this, content passes even if flagged
+    threshold: float = 0.8
+    # Scene-type fallback narrations
+    fallbacks: dict[str, str] = field(default_factory=dict)
+
+
+# ── Regex fallback patterns ─────────────────────────────────────────────────
+# Used when Llama Guard is unavailable. Catches obvious violations only.
+# Intentionally conservative — false negatives preferred over false positives.
+_FALLBACK_PATTERNS: list[tuple[re.Pattern, ViolationCategory]] = [
+    (
+        re.compile(
+            r"\b(kill\s+(?:all|every)\s+(?:real|actual)\s+(?:people|humans|children))\b",
+            re.IGNORECASE,
+        ),
+        ViolationCategory.REAL_WORLD_HARM,
+    ),
+    (
+        re.compile(
+            r"\b((?:you|we)\s+should\s+(?:actually|really)\s+(?:harm|hurt|kill))\b",
+            re.IGNORECASE,
+        ),
+        ViolationCategory.REAL_WORLD_HARM,
+    ),
+    (
+        re.compile(
+            r"\b((?:in\s+real\s+life|irl)\s+(?:you|we)\s+(?:should|could|must)\s+"
+            r"(?:attack|hurt|kill|harm))\b",
+            re.IGNORECASE,
+        ),
+        ViolationCategory.REAL_WORLD_HARM,
+    ),
+]
+
+# ── Default game profiles ───────────────────────────────────────────────────
+
+_DEFAULT_PROFILES: dict[str, GameProfile] = {
+    "morrowind": GameProfile(
+        game_id="morrowind",
+        display_name="The Elder Scrolls III: Morrowind",
+        vocabulary_whitelist=[
+            "Skooma",
+            "Moon Sugar",
+            "slave",
+            "slavery",
+            "Morag Tong",
+            "Dark Brotherhood",
+            "Telvanni",
+            "Camonna Tong",
+            "smuggler",
+            "assassin",
+            "Sixth House",
+            "Corprus",
+            "Dagoth Ur",
+            "Nerevarine",
+        ],
+        context_prompt=(
+            "You are narrating gameplay of The Elder Scrolls III: Morrowind. "
+            "Morrowind contains mature themes including slavery, drug use (Skooma/Moon Sugar), "
+            "assassin guilds (Morag Tong, Dark Brotherhood), and political intrigue. "
+            "Treat these as game mechanics and historical worldbuilding within the game's "
+            "fictional universe. Never editorialize on real-world parallels. "
+            "Narrate events neutrally as a game commentator would."
+        ),
+        threshold=0.85,
+        fallbacks={
+            "combat": "The battle rages on in the ashlands of Vvardenfell.",
+            "dialogue": "The conversation continues between the characters.",
+            "exploration": "The Nerevarine presses onward through the landscape.",
+            "default": "The adventure continues in Morrowind.",
+        },
+    ),
+    "default": GameProfile(
+        game_id="default",
+        display_name="Generic Game",
+        vocabulary_whitelist=[],
+        context_prompt=(
+            "You are narrating gameplay. Describe in-game events as a neutral "
+            "game commentator. Never reference real-world violence, politics, "
+            "or controversial topics. Stay focused on game mechanics and story."
+        ),
+        threshold=0.8,
+        fallbacks={
+            "combat": "The action continues on screen.",
+            "dialogue": "The conversation unfolds between characters.",
+            "exploration": "The player explores the game world.",
+            "default": "The gameplay continues.",
+        },
+    ),
+}
+
+
+class ContentModerator:
+    """Three-layer content moderation pipeline.
+
+    Layer 1: Game-context system prompts with vocabulary whitelists.
+    Layer 2: LLM-based moderation (Llama Guard via Ollama, with regex fallback).
+    Layer 3: Per-game threshold tuning and profile-based filtering.
+
+    Follows graceful degradation — if Llama Guard is unavailable,
+    falls back to regex patterns. Never crashes.
+    """
+
+    def __init__(
+        self,
+        profiles: dict[str, GameProfile] | None = None,
+        guard_model: str | None = None,
+    ) -> None:
+        self._profiles: dict[str, GameProfile] = profiles or dict(_DEFAULT_PROFILES)
+        self._guard_model = guard_model or settings.moderation_guard_model
+        self._guard_available: bool | None = None  # Lazy-checked
+        self._metrics = _ModerationMetrics()
+
+    def get_profile(self, game: str) -> GameProfile:
+        """Get the moderation profile for a game, falling back to default."""
+        return self._profiles.get(game, self._profiles["default"])
+
+    def register_profile(self, profile: GameProfile) -> None:
+        """Register or update a game moderation profile."""
+        self._profiles[profile.game_id] = profile
+        logger.info("Registered moderation profile: %s", profile.game_id)
+
+    def get_context_prompt(self, game: str) -> str:
+        """Get the game-context system prompt (Layer 1).
+
+        Returns the context prompt for the given game, which should be
+        prepended to the narrator's system prompt.
+        """
+        profile = self.get_profile(game)
+        return profile.context_prompt
+
+    async def check(
+        self,
+        text: str,
+        game: str = "default",
+        scene_type: str = "default",
+    ) -> ModerationResult:
+        """Run the full moderation pipeline on narrator output.
+
+        Args:
+            text: The text to moderate (narrator output).
+            game: Game identifier for profile selection.
+            scene_type: Current scene type for fallback selection.
+
+        Returns:
+            ModerationResult with verdict, confidence, and fallback.
+        """
+        start = time.monotonic()
+        profile = self.get_profile(game)
+
+        # Layer 1: Vocabulary whitelist pre-processing
+        cleaned_text = self._apply_whitelist(text, profile)
+
+        # Layer 2: LLM guard or regex fallback
+        result = await self._run_guard(cleaned_text, profile)
+
+        # Layer 3: Threshold tuning
+        if result.verdict == ModerationVerdict.FAIL and result.confidence < profile.threshold:
+            logger.info(
+                "Moderation flag below threshold (%.2f < %.2f) — allowing",
+                result.confidence,
+                profile.threshold,
+            )
+            result = ModerationResult(
+                verdict=ModerationVerdict.PASS,
+                blocked=False,
+                confidence=result.confidence,
+                layer="threshold",
+                reason=f"Below threshold ({result.confidence:.2f} < {profile.threshold:.2f})",
+            )
+
+        # Attach fallback narration if blocked
+        if result.blocked:
+            result.fallback = profile.fallbacks.get(
+                scene_type, profile.fallbacks.get("default", "")
+            )
+
+        result.latency_ms = (time.monotonic() - start) * 1000
+        self._metrics.record(result)
+
+        if result.blocked:
+            logger.warning(
+                "Content blocked [%s/%s]: category=%s confidence=%.2f reason=%s",
+                game,
+                scene_type,
+                result.category.value,
+                result.confidence,
+                result.reason,
+            )
+
+        return result
+
+    def _apply_whitelist(self, text: str, profile: GameProfile) -> str:
+        """Layer 1: Replace whitelisted game terms with placeholders.
+
+        This prevents the guard model from flagging in-game terminology
+        (e.g., "Skooma" being flagged as drug reference).
+        """
+        cleaned = text
+        for term in profile.vocabulary_whitelist:
+            # Case-insensitive replacement with a neutral placeholder
+            pattern = re.compile(re.escape(term), re.IGNORECASE)
+            cleaned = pattern.sub("[GAME_TERM]", cleaned)
+        return cleaned
+
+    async def _run_guard(
+        self, text: str, profile: GameProfile
+    ) -> ModerationResult:
+        """Layer 2: Run LLM guard model or fall back to regex."""
+        if not settings.moderation_enabled:
+            return ModerationResult(
+                verdict=ModerationVerdict.PASS,
+                blocked=False,
+                layer="disabled",
+                reason="Moderation disabled",
+            )
+
+        # Try Llama Guard via Ollama
+        if await self._is_guard_available():
+            try:
+                return await self._check_with_guard(text)
+            except Exception as exc:
+                logger.warning("Guard model failed, using regex fallback: %s", exc)
+                self._guard_available = False
+
+        # Regex fallback
+        return self._check_with_regex(text)
+
+    async def _is_guard_available(self) -> bool:
+        """Check if the guard model is available via Ollama."""
+        if self._guard_available is not None:
+            return self._guard_available
+
+        try:
+            import aiohttp
+
+            url = f"{settings.normalized_ollama_url}/api/tags"
+            timeout = aiohttp.ClientTimeout(total=5)
+            async with aiohttp.ClientSession(timeout=timeout) as session:
+                async with session.get(url) as resp:
+                    if resp.status != 200:
+                        self._guard_available = False
+                        return False
+                    data = await resp.json()
+                    models = [m.get("name", "") for m in data.get("models", [])]
+                    self._guard_available = any(
+                        self._guard_model in m or m.startswith(self._guard_model)
+                        for m in models
+                    )
+                    if not self._guard_available:
+                        logger.info(
+                            "Guard model '%s' not found in Ollama — using regex fallback",
+                            self._guard_model,
+                        )
+                    return self._guard_available
+        except Exception as exc:
+            logger.debug("Ollama guard check failed: %s", exc)
+            self._guard_available = False
+            return False
+
+    async def _check_with_guard(self, text: str) -> ModerationResult:
+        """Run moderation check via Llama Guard."""
+        import aiohttp
+
+        url = f"{settings.normalized_ollama_url}/api/chat"
+        payload = {
+            "model": self._guard_model,
+            "messages": [
+                {
+                    "role": "user",
+                    "content": text,
+                }
+            ],
+            "stream": False,
+            "options": {"temperature": 0.0},
+        }
+
+        timeout = aiohttp.ClientTimeout(total=10)
+        async with aiohttp.ClientSession(timeout=timeout) as session:
+            async with session.post(url, json=payload) as resp:
+                if resp.status != 200:
+                    raise RuntimeError(f"Guard API error: {resp.status}")
+                data = await resp.json()
+
+        response_text = data.get("message", {}).get("content", "").strip().lower()
+
+        # Llama Guard returns "safe" or "unsafe\n<category>"
+        if response_text.startswith("safe"):
+            return ModerationResult(
+                verdict=ModerationVerdict.PASS,
+                blocked=False,
+                confidence=0.0,
+                layer="llama_guard",
+                reason="Content safe",
+            )
+
+        # Parse unsafe response
+        category = ViolationCategory.NONE
+        confidence = 0.95  # High confidence from LLM guard
+        lines = response_text.split("\n")
+        if len(lines) > 1:
+            cat_str = lines[1].strip()
+            category = _parse_guard_category(cat_str)
+
+        return ModerationResult(
+            verdict=ModerationVerdict.FAIL,
+            blocked=True,
+            category=category,
+            confidence=confidence,
+            layer="llama_guard",
+            reason=f"Guard flagged: {response_text}",
+        )
+
+    def _check_with_regex(self, text: str) -> ModerationResult:
+        """Regex fallback when guard model is unavailable.
+
+        Intentionally conservative — only catches obvious real-world harm.
+        """
+        for pattern, category in _FALLBACK_PATTERNS:
+            match = pattern.search(text)
+            if match:
+                return ModerationResult(
+                    verdict=ModerationVerdict.FAIL,
+                    blocked=True,
+                    category=category,
+                    confidence=0.95,  # Regex patterns are high-signal
+                    layer="regex_fallback",
+                    reason=f"Regex match: {match.group(0)[:50]}",
+                )
+
+        return ModerationResult(
+            verdict=ModerationVerdict.PASS,
+            blocked=False,
+            layer="regex_fallback",
+            reason="No regex matches",
+        )
+
+    def get_metrics(self) -> dict[str, Any]:
+        """Get moderation pipeline metrics."""
+        return self._metrics.to_dict()
+
+    def reset_guard_cache(self) -> None:
+        """Reset the guard availability cache (e.g., after pulling model)."""
+        self._guard_available = None
+
+
+class _ModerationMetrics:
+    """Tracks moderation pipeline performance."""
+
+    def __init__(self) -> None:
+        self.total_checks: int = 0
+        self.passed: int = 0
+        self.blocked: int = 0
+        self.errors: int = 0
+        self.total_latency_ms: float = 0.0
+        self.by_layer: dict[str, int] = {}
+        self.by_category: dict[str, int] = {}
+
+    def record(self, result: ModerationResult) -> None:
+        self.total_checks += 1
+        self.total_latency_ms += result.latency_ms
+
+        if result.verdict == ModerationVerdict.PASS:
+            self.passed += 1
+        elif result.verdict == ModerationVerdict.FAIL:
+            self.blocked += 1
+        else:
+            self.errors += 1
+
+        layer = result.layer or "unknown"
+        self.by_layer[layer] = self.by_layer.get(layer, 0) + 1
+
+        if result.blocked:
+            cat = result.category.value
+            self.by_category[cat] = self.by_category.get(cat, 0) + 1
+
+    def to_dict(self) -> dict[str, Any]:
+        return {
+            "total_checks": self.total_checks,
+            "passed": self.passed,
+            "blocked": self.blocked,
+            "errors": self.errors,
+            "avg_latency_ms": (
+                round(self.total_latency_ms / self.total_checks, 2)
+                if self.total_checks > 0
+                else 0.0
+            ),
+            "by_layer": dict(self.by_layer),
+            "by_category": dict(self.by_category),
+        }
+
+
+def _parse_guard_category(cat_str: str) -> ViolationCategory:
+    """Parse Llama Guard category string to ViolationCategory."""
+    cat_lower = cat_str.lower()
+    if "hate" in cat_lower:
+        return ViolationCategory.HATE_SPEECH
+    if "violence" in cat_lower:
+        return ViolationCategory.VIOLENCE_GLORIFICATION
+    if "sexual" in cat_lower:
+        return ViolationCategory.SEXUAL_CONTENT
+    if "self-harm" in cat_lower or "self_harm" in cat_lower or "suicide" in cat_lower:
+        return ViolationCategory.SELF_HARM
+    if "harm" in cat_lower or "dangerous" in cat_lower:
+        return ViolationCategory.REAL_WORLD_HARM
+    return ViolationCategory.NONE
+
+
+# ── Module-level singleton ──────────────────────────────────────────────────
+_moderator: ContentModerator | None = None
+
+
+def get_moderator() -> ContentModerator:
+    """Get or create the content moderator singleton."""
+    global _moderator
+    if _moderator is None:
+        _moderator = ContentModerator()
+    return _moderator
diff --git a/src/infrastructure/guards/profiles.py b/src/infrastructure/guards/profiles.py
new file mode 100644
index 00000000..c96ce2ca
--- /dev/null
+++ b/src/infrastructure/guards/profiles.py
@@ -0,0 +1,56 @@
+"""Load game moderation profiles from config/moderation.yaml.
+
+Falls back to hardcoded defaults if the YAML file is missing or malformed.
+"""
+
+import logging
+from pathlib import Path
+
+from infrastructure.guards.moderation import GameProfile
+
+logger = logging.getLogger(__name__)
+
+
+def load_profiles(config_path: Path | None = None) -> dict[str, GameProfile]:
+    """Load game moderation profiles from YAML config.
+
+    Args:
+        config_path: Path to moderation.yaml. Defaults to config/moderation.yaml.
+
+    Returns:
+        Dict mapping game_id to GameProfile.
+    """
+    path = config_path or Path("config/moderation.yaml")
+
+    if not path.exists():
+        logger.info("Moderation config not found at %s — using defaults", path)
+        return {}
+
+    try:
+        import yaml
+    except ImportError:
+        logger.warning("PyYAML not installed — using default moderation profiles")
+        return {}
+
+    try:
+        data = yaml.safe_load(path.read_text())
+    except Exception as exc:
+        logger.error("Failed to parse moderation config: %s", exc)
+        return {}
+
+    profiles: dict[str, GameProfile] = {}
+    for game_id, profile_data in data.get("profiles", {}).items():
+        try:
+            profiles[game_id] = GameProfile(
+                game_id=game_id,
+                display_name=profile_data.get("display_name", game_id),
+                vocabulary_whitelist=profile_data.get("vocabulary_whitelist", []),
+                context_prompt=profile_data.get("context_prompt", ""),
+                threshold=float(profile_data.get("threshold", 0.8)),
+                fallbacks=profile_data.get("fallbacks", {}),
+            )
+        except Exception as exc:
+            logger.warning("Invalid profile '%s': %s", game_id, exc)
+
+    logger.info("Loaded %d moderation profiles from %s", len(profiles), path)
+    return profiles
diff --git a/src/infrastructure/sovereignty_metrics.py b/src/infrastructure/sovereignty_metrics.py
new file mode 100644
index 00000000..a305fa65
--- /dev/null
+++ b/src/infrastructure/sovereignty_metrics.py
@@ -0,0 +1,307 @@
+"""Sovereignty metrics collector and store.
+
+Tracks research sovereignty progress: cache hit rate, API cost,
+time-to-report, and human involvement. Persists to SQLite for
+trend analysis and dashboard display.
+
+Refs: #981
+"""
+
+import json
+import logging
+import sqlite3
+from contextlib import closing
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+from pathlib import Path
+from typing import Any
+
+from config import settings
+
+logger = logging.getLogger(__name__)
+
+DB_PATH = Path(settings.repo_root) / "data" / "sovereignty_metrics.db"
+
+_SCHEMA = """
+CREATE TABLE IF NOT EXISTS sovereignty_metrics (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    timestamp TEXT NOT NULL,
+    metric_type TEXT NOT NULL,
+    value REAL NOT NULL,
+    metadata TEXT DEFAULT '{}'
+);
+CREATE INDEX IF NOT EXISTS idx_sm_type ON sovereignty_metrics(metric_type);
+CREATE INDEX IF NOT EXISTS idx_sm_ts ON sovereignty_metrics(timestamp);
+
+CREATE TABLE IF NOT EXISTS sovereignty_alerts (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    timestamp TEXT NOT NULL,
+    alert_type TEXT NOT NULL,
+    message TEXT NOT NULL,
+    value REAL NOT NULL,
+    threshold REAL NOT NULL,
+    acknowledged INTEGER DEFAULT 0
+);
+CREATE INDEX IF NOT EXISTS idx_sa_ts ON sovereignty_alerts(timestamp);
+CREATE INDEX IF NOT EXISTS idx_sa_ack ON sovereignty_alerts(acknowledged);
+"""
+
+
+@dataclass
+class SovereigntyMetric:
+    """A single sovereignty metric data point."""
+
+    metric_type: str  # cache_hit_rate, api_cost, time_to_report, human_involvement
+    value: float
+    timestamp: str = field(default_factory=lambda: datetime.now(UTC).isoformat())
+    metadata: dict[str, Any] = field(default_factory=dict)
+
+
+@dataclass
+class SovereigntyAlert:
+    """An alert triggered when a metric exceeds a threshold."""
+
+    alert_type: str
+    message: str
+    value: float
+    threshold: float
+    timestamp: str = field(default_factory=lambda: datetime.now(UTC).isoformat())
+    acknowledged: bool = False
+
+
+# Graduation targets from issue #981
+GRADUATION_TARGETS = {
+    "cache_hit_rate": {"week1": 0.10, "month1": 0.40, "month3": 0.80, "graduation": 0.90},
+    "api_cost": {"week1": 1.50, "month1": 0.50, "month3": 0.10, "graduation": 0.01},
+    "time_to_report": {"week1": 180.0, "month1": 30.0, "month3": 5.0, "graduation": 1.0},
+    "human_involvement": {"week1": 1.0, "month1": 0.5, "month3": 0.25, "graduation": 0.0},
+    "local_artifacts": {"week1": 6, "month1": 30, "month3": 100, "graduation": 500},
+}
+
+
+class SovereigntyMetricsStore:
+    """SQLite-backed sovereignty metrics store.
+
+    Thread-safe: creates a new connection per operation.
+    """
+
+    def __init__(self, db_path: Path | None = None) -> None:
+        self._db_path = db_path or DB_PATH
+        self._init_db()
+
+    def _init_db(self) -> None:
+        """Initialize the database schema."""
+        try:
+            self._db_path.parent.mkdir(parents=True, exist_ok=True)
+            with closing(sqlite3.connect(str(self._db_path))) as conn:
+                conn.execute("PRAGMA journal_mode=WAL")
+                conn.execute(f"PRAGMA busy_timeout={settings.db_busy_timeout_ms}")
+                conn.executescript(_SCHEMA)
+                conn.commit()
+        except Exception as exc:
+            logger.warning("Failed to initialize sovereignty metrics DB: %s", exc)
+
+    def _connect(self) -> sqlite3.Connection:
+        """Get a new connection."""
+        conn = sqlite3.connect(str(self._db_path))
+        conn.row_factory = sqlite3.Row
+        conn.execute(f"PRAGMA busy_timeout={settings.db_busy_timeout_ms}")
+        return conn
+
+    def record(self, metric: SovereigntyMetric) -> None:
+        """Record a sovereignty metric data point."""
+        try:
+            with closing(self._connect()) as conn:
+                conn.execute(
+                    "INSERT INTO sovereignty_metrics (timestamp, metric_type, value, metadata) "
+                    "VALUES (?, ?, ?, ?)",
+                    (
+                        metric.timestamp,
+                        metric.metric_type,
+                        metric.value,
+                        json.dumps(metric.metadata),
+                    ),
+                )
+                conn.commit()
+        except Exception as exc:
+            logger.warning("Failed to record sovereignty metric: %s", exc)
+
+        # Check thresholds for alerts
+        self._check_alert(metric)
+
+    def _check_alert(self, metric: SovereigntyMetric) -> None:
+        """Check if a metric triggers an alert."""
+        threshold = settings.sovereignty_api_cost_alert_threshold
+        if metric.metric_type == "api_cost" and metric.value > threshold:
+            alert = SovereigntyAlert(
+                alert_type="api_cost_exceeded",
+                message=f"API cost ${metric.value:.2f} exceeds threshold ${threshold:.2f}",
+                value=metric.value,
+                threshold=threshold,
+            )
+            self._record_alert(alert)
+
+    def _record_alert(self, alert: SovereigntyAlert) -> None:
+        """Persist an alert."""
+        try:
+            with closing(self._connect()) as conn:
+                conn.execute(
+                    "INSERT INTO sovereignty_alerts "
+                    "(timestamp, alert_type, message, value, threshold) "
+                    "VALUES (?, ?, ?, ?, ?)",
+                    (
+                        alert.timestamp,
+                        alert.alert_type,
+                        alert.message,
+                        alert.value,
+                        alert.threshold,
+                    ),
+                )
+                conn.commit()
+            logger.warning("Sovereignty alert: %s", alert.message)
+        except Exception as exc:
+            logger.warning("Failed to record sovereignty alert: %s", exc)
+
+    def get_latest(self, metric_type: str, limit: int = 50) -> list[dict]:
+        """Get the most recent metric values for a given type."""
+        try:
+            with closing(self._connect()) as conn:
+                rows = conn.execute(
+                    "SELECT timestamp, value, metadata FROM sovereignty_metrics "
+                    "WHERE metric_type = ? ORDER BY timestamp DESC LIMIT ?",
+                    (metric_type, limit),
+                ).fetchall()
+                return [
+                    {
+                        "timestamp": row["timestamp"],
+                        "value": row["value"],
+                        "metadata": json.loads(row["metadata"]) if row["metadata"] else {},
+                    }
+                    for row in rows
+                ]
+        except Exception as exc:
+            logger.warning("Failed to query sovereignty metrics: %s", exc)
+            return []
+
+    def get_summary(self) -> dict[str, Any]:
+        """Get a summary of current sovereignty metrics progress."""
+        summary: dict[str, Any] = {}
+        for metric_type in GRADUATION_TARGETS:
+            latest = self.get_latest(metric_type, limit=1)
+            history = self.get_latest(metric_type, limit=30)
+
+            current_value = latest[0]["value"] if latest else None
+            targets = GRADUATION_TARGETS[metric_type]
+
+            # Determine current phase based on value
+            phase = "pre-start"
+            if current_value is not None:
+                if metric_type in ("api_cost", "time_to_report", "human_involvement"):
+                    # Lower is better
+                    if current_value <= targets["graduation"]:
+                        phase = "graduated"
+                    elif current_value <= targets["month3"]:
+                        phase = "month3"
+                    elif current_value <= targets["month1"]:
+                        phase = "month1"
+                    elif current_value <= targets["week1"]:
+                        phase = "week1"
+                    else:
+                        phase = "pre-start"
+                else:
+                    # Higher is better
+                    if current_value >= targets["graduation"]:
+                        phase = "graduated"
+                    elif current_value >= targets["month3"]:
+                        phase = "month3"
+                    elif current_value >= targets["month1"]:
+                        phase = "month1"
+                    elif current_value >= targets["week1"]:
+                        phase = "week1"
+                    else:
+                        phase = "pre-start"
+
+            summary[metric_type] = {
+                "current": current_value,
+                "phase": phase,
+                "targets": targets,
+                "trend": [{"t": h["timestamp"], "v": h["value"]} for h in reversed(history)],
+            }
+
+        return summary
+
+    def get_alerts(self, unacknowledged_only: bool = True, limit: int = 20) -> list[dict]:
+        """Get sovereignty alerts."""
+        try:
+            with closing(self._connect()) as conn:
+                if unacknowledged_only:
+                    rows = conn.execute(
+                        "SELECT * FROM sovereignty_alerts "
+                        "WHERE acknowledged = 0 ORDER BY timestamp DESC LIMIT ?",
+                        (limit,),
+                    ).fetchall()
+                else:
+                    rows = conn.execute(
+                        "SELECT * FROM sovereignty_alerts "
+                        "ORDER BY timestamp DESC LIMIT ?",
+                        (limit,),
+                    ).fetchall()
+                return [dict(row) for row in rows]
+        except Exception as exc:
+            logger.warning("Failed to query sovereignty alerts: %s", exc)
+            return []
+
+    def acknowledge_alert(self, alert_id: int) -> bool:
+        """Acknowledge an alert."""
+        try:
+            with closing(self._connect()) as conn:
+                conn.execute(
+                    "UPDATE sovereignty_alerts SET acknowledged = 1 WHERE id = ?",
+                    (alert_id,),
+                )
+                conn.commit()
+                return True
+        except Exception as exc:
+            logger.warning("Failed to acknowledge alert: %s", exc)
+            return False
+
+
+# ── Module-level singleton ─────────────────────────────────────────────────
+_store: SovereigntyMetricsStore | None = None
+
+
+def get_sovereignty_store() -> SovereigntyMetricsStore:
+    """Return the module-level store, creating it on first access."""
+    global _store
+    if _store is None:
+        _store = SovereigntyMetricsStore()
+    return _store
+
+
+async def emit_sovereignty_metric(
+    metric_type: str,
+    value: float,
+    metadata: dict[str, Any] | None = None,
+) -> None:
+    """Convenience function to record a sovereignty metric and emit an event.
+
+    Also publishes to the event bus for real-time subscribers.
+    """
+    import asyncio
+
+    from infrastructure.events.bus import emit
+
+    metric = SovereigntyMetric(
+        metric_type=metric_type,
+        value=value,
+        metadata=metadata or {},
+    )
+    # Record to SQLite in thread to avoid blocking event loop
+    await asyncio.to_thread(get_sovereignty_store().record, metric)
+
+    # Publish to event bus for real-time consumers
+    await emit(
+        f"sovereignty.metric.{metric_type}",
+        source="sovereignty_metrics",
+        data={"metric_type": metric_type, "value": value, **(metadata or {})},
+    )
diff --git a/src/infrastructure/world/benchmark/__init__.py b/src/infrastructure/world/benchmark/__init__.py
new file mode 100644
index 00000000..8a840b73
--- /dev/null
+++ b/src/infrastructure/world/benchmark/__init__.py
@@ -0,0 +1,17 @@
+"""Performance regression suite for Morrowind agent scenarios.
+
+Provides standardised benchmark scenarios, a runner that executes them
+through the heartbeat loop with a mock (or live) world adapter, and
+metrics collection for CI-integrated regression detection.
+"""
+
+from infrastructure.world.benchmark.metrics import BenchmarkMetrics
+from infrastructure.world.benchmark.runner import BenchmarkRunner
+from infrastructure.world.benchmark.scenarios import BenchmarkScenario, load_scenarios
+
+__all__ = [
+    "BenchmarkMetrics",
+    "BenchmarkRunner",
+    "BenchmarkScenario",
+    "load_scenarios",
+]
diff --git a/src/infrastructure/world/benchmark/metrics.py b/src/infrastructure/world/benchmark/metrics.py
new file mode 100644
index 00000000..431a4550
--- /dev/null
+++ b/src/infrastructure/world/benchmark/metrics.py
@@ -0,0 +1,195 @@
+"""Benchmark metrics collection and persistence.
+
+Tracks per-scenario results: cycles used, wall-clock time, success,
+LLM call count, and estimated metabolic cost.  Results are persisted
+as JSONL for trend analysis and CI regression gates.
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+from dataclasses import asdict, dataclass, field
+from pathlib import Path
+
+logger = logging.getLogger(__name__)
+
+
+@dataclass
+class ScenarioResult:
+    """Outcome of running a single benchmark scenario.
+
+    Attributes:
+        scenario_name:  Human-readable scenario name.
+        success:        Whether the goal predicate was satisfied.
+        cycles_used:    Number of heartbeat cycles executed.
+        max_cycles:     The scenario's cycle budget.
+        wall_time_ms:   Total wall-clock time in milliseconds.
+        llm_calls:      Number of LLM inference calls made.
+        metabolic_cost: Estimated resource cost (arbitrary unit, ≈ tokens).
+        error:          Error message if the run crashed.
+        tags:           Scenario tags (copied for filtering).
+    """
+
+    scenario_name: str
+    success: bool = False
+    cycles_used: int = 0
+    max_cycles: int = 0
+    wall_time_ms: int = 0
+    llm_calls: int = 0
+    metabolic_cost: float = 0.0
+    error: str | None = None
+    tags: list[str] = field(default_factory=list)
+
+
+@dataclass
+class BenchmarkMetrics:
+    """Aggregated metrics across all scenarios in a benchmark run.
+
+    Attributes:
+        results:       Per-scenario results.
+        total_time_ms: Total wall-clock time for the full suite.
+        timestamp:     ISO-8601 timestamp of the run.
+        commit_sha:    Git commit SHA (if available).
+    """
+
+    results: list[ScenarioResult] = field(default_factory=list)
+    total_time_ms: int = 0
+    timestamp: str = ""
+    commit_sha: str = ""
+
+    # -- derived properties ------------------------------------------------
+
+    @property
+    def pass_count(self) -> int:
+        return sum(1 for r in self.results if r.success)
+
+    @property
+    def fail_count(self) -> int:
+        return sum(1 for r in self.results if not r.success)
+
+    @property
+    def success_rate(self) -> float:
+        if not self.results:
+            return 0.0
+        return self.pass_count / len(self.results)
+
+    @property
+    def total_llm_calls(self) -> int:
+        return sum(r.llm_calls for r in self.results)
+
+    @property
+    def total_metabolic_cost(self) -> float:
+        return sum(r.metabolic_cost for r in self.results)
+
+    # -- persistence -------------------------------------------------------
+
+    def save(self, path: Path) -> None:
+        """Append this run's results to a JSONL file at *path*."""
+        path = Path(path)
+        path.parent.mkdir(parents=True, exist_ok=True)
+        record = {
+            "timestamp": self.timestamp,
+            "commit_sha": self.commit_sha,
+            "total_time_ms": self.total_time_ms,
+            "success_rate": round(self.success_rate, 4),
+            "total_llm_calls": self.total_llm_calls,
+            "total_metabolic_cost": round(self.total_metabolic_cost, 2),
+            "scenarios": [asdict(r) for r in self.results],
+        }
+        with path.open("a") as f:
+            f.write(json.dumps(record) + "\n")
+        logger.info("Benchmark results saved to %s", path)
+
+    # -- summary -----------------------------------------------------------
+
+    def summary(self) -> str:
+        """Return a human-readable summary of the benchmark run."""
+        lines = [
+            "=== Benchmark Summary ===",
+            f"Scenarios: {len(self.results)}  "
+            f"Passed: {self.pass_count}  "
+            f"Failed: {self.fail_count}  "
+            f"Success rate: {self.success_rate:.0%}",
+            f"Total time: {self.total_time_ms} ms  "
+            f"LLM calls: {self.total_llm_calls}  "
+            f"Metabolic cost: {self.total_metabolic_cost:.1f}",
+        ]
+        if self.commit_sha:
+            lines.append(f"Commit: {self.commit_sha}")
+        lines.append("")
+        for r in self.results:
+            status = "PASS" if r.success else "FAIL"
+            lines.append(
+                f"  [{status}] {r.scenario_name} — "
+                f"{r.cycles_used}/{r.max_cycles} cycles, "
+                f"{r.wall_time_ms} ms, "
+                f"{r.llm_calls} LLM calls"
+            )
+            if r.error:
+                lines.append(f"         Error: {r.error}")
+        return "\n".join(lines)
+
+
+def load_history(path: Path) -> list[dict]:
+    """Load benchmark history from a JSONL file.
+
+    Returns:
+        List of run records, most recent first.
+    """
+    path = Path(path)
+    if not path.exists():
+        return []
+    records: list[dict] = []
+    for line in path.read_text().strip().splitlines():
+        try:
+            records.append(json.loads(line))
+        except json.JSONDecodeError:
+            continue
+    return list(reversed(records))
+
+
+def compare_runs(
+    current: BenchmarkMetrics,
+    baseline: BenchmarkMetrics,
+) -> str:
+    """Compare two benchmark runs and report regressions.
+
+    Returns:
+        Human-readable comparison report.
+    """
+    lines = ["=== Regression Report ==="]
+
+    # Overall
+    rate_delta = current.success_rate - baseline.success_rate
+    lines.append(
+        f"Success rate: {baseline.success_rate:.0%} -> {current.success_rate:.0%} "
+        f"({rate_delta:+.0%})"
+    )
+
+    cost_delta = current.total_metabolic_cost - baseline.total_metabolic_cost
+    if baseline.total_metabolic_cost > 0:
+        cost_pct = (cost_delta / baseline.total_metabolic_cost) * 100
+        lines.append(
+            f"Metabolic cost: {baseline.total_metabolic_cost:.1f} -> "
+            f"{current.total_metabolic_cost:.1f} ({cost_pct:+.1f}%)"
+        )
+
+    # Per-scenario
+    baseline_map = {r.scenario_name: r for r in baseline.results}
+    for r in current.results:
+        b = baseline_map.get(r.scenario_name)
+        if b is None:
+            lines.append(f"  [NEW] {r.scenario_name}")
+            continue
+        if b.success and not r.success:
+            lines.append(f"  [REGRESSION] {r.scenario_name} — was PASS, now FAIL")
+        elif not b.success and r.success:
+            lines.append(f"  [IMPROVEMENT] {r.scenario_name} — was FAIL, now PASS")
+        elif r.cycles_used > b.cycles_used * 1.5:
+            lines.append(
+                f"  [SLOWER] {r.scenario_name} — "
+                f"{b.cycles_used} -> {r.cycles_used} cycles (+{r.cycles_used - b.cycles_used})"
+            )
+
+    return "\n".join(lines)
diff --git a/src/infrastructure/world/benchmark/runner.py b/src/infrastructure/world/benchmark/runner.py
new file mode 100644
index 00000000..965d3ce9
--- /dev/null
+++ b/src/infrastructure/world/benchmark/runner.py
@@ -0,0 +1,167 @@
+"""Benchmark runner — executes scenarios through the heartbeat loop.
+
+Wires each ``BenchmarkScenario`` into a ``MockWorldAdapter`` (or a
+supplied adapter), runs the heartbeat for up to ``max_cycles``, and
+collects ``BenchmarkMetrics``.
+"""
+
+from __future__ import annotations
+
+import logging
+import subprocess
+import time
+from datetime import UTC, datetime
+
+from infrastructure.world.adapters.mock import MockWorldAdapter
+from infrastructure.world.benchmark.metrics import BenchmarkMetrics, ScenarioResult
+from infrastructure.world.benchmark.scenarios import BenchmarkScenario
+from infrastructure.world.interface import WorldInterface
+from loop.heartbeat import Heartbeat
+
+logger = logging.getLogger(__name__)
+
+# Rough estimate: each heartbeat cycle costs ~1 unit of metabolic cost
+# (gather + reason + act phases each touch the LLM router once).
+_COST_PER_CYCLE = 3.0  # three phases per cycle
+
+
+class BenchmarkRunner:
+    """Run benchmark scenarios and collect metrics.
+
+    Parameters
+    ----------
+    adapter_factory:
+        Optional callable that returns a ``WorldInterface`` for a given
+        scenario.  Defaults to building a ``MockWorldAdapter`` from the
+        scenario's start state.
+    heartbeat_interval:
+        Seconds between heartbeat ticks (0 for immediate).
+    """
+
+    def __init__(
+        self,
+        *,
+        adapter_factory=None,
+        heartbeat_interval: float = 0.0,
+    ) -> None:
+        self._adapter_factory = adapter_factory or self._default_adapter
+        self._interval = heartbeat_interval
+
+    # -- public API --------------------------------------------------------
+
+    async def run(
+        self,
+        scenarios: list[BenchmarkScenario],
+    ) -> BenchmarkMetrics:
+        """Execute all *scenarios* and return aggregated metrics."""
+        metrics = BenchmarkMetrics(
+            timestamp=datetime.now(UTC).isoformat(),
+            commit_sha=self._git_sha(),
+        )
+        suite_start = time.monotonic()
+
+        for scenario in scenarios:
+            logger.info("Benchmark: starting '%s'", scenario.name)
+            result = await self._run_scenario(scenario)
+            metrics.results.append(result)
+            status = "PASS" if result.success else "FAIL"
+            logger.info(
+                "Benchmark: '%s' %s (%d/%d cycles, %d ms)",
+                scenario.name,
+                status,
+                result.cycles_used,
+                result.max_cycles,
+                result.wall_time_ms,
+            )
+
+        metrics.total_time_ms = int((time.monotonic() - suite_start) * 1000)
+        return metrics
+
+    # -- internal ----------------------------------------------------------
+
+    async def _run_scenario(self, scenario: BenchmarkScenario) -> ScenarioResult:
+        """Run a single scenario through the heartbeat loop."""
+        result = ScenarioResult(
+            scenario_name=scenario.name,
+            max_cycles=scenario.max_cycles,
+            tags=list(scenario.tags),
+        )
+
+        adapter = self._adapter_factory(scenario)
+        adapter.connect()
+
+        hb = Heartbeat(world=adapter, interval=self._interval)
+        actions: list[dict] = []
+
+        start = time.monotonic()
+        try:
+            for cycle in range(1, scenario.max_cycles + 1):
+                record = await hb.run_once()
+                result.cycles_used = cycle
+
+                # Track LLM calls (each cycle has 3 phases that may call LLM)
+                result.llm_calls += 3
+
+                # Accumulate actions for goal predicate
+                if record.action_taken and record.action_taken != "idle":
+                    actions.append(
+                        {
+                            "action": record.action_taken,
+                            "target": record.observation.get("location", ""),
+                            "status": record.action_status,
+                        }
+                    )
+
+                # Update adapter location if scenario simulates movement
+                current_location = self._get_current_location(adapter)
+
+                # Check goal predicate
+                if scenario.goal_predicate is not None:
+                    if scenario.goal_predicate(actions, current_location):
+                        result.success = True
+                        break
+                elif cycle == scenario.max_cycles:
+                    # No predicate — success if we survived all cycles
+                    result.success = True
+
+        except Exception as exc:
+            logger.warning("Benchmark scenario '%s' crashed: %s", scenario.name, exc)
+            result.error = str(exc)
+        finally:
+            adapter.disconnect()
+
+        result.wall_time_ms = int((time.monotonic() - start) * 1000)
+        result.metabolic_cost = result.cycles_used * _COST_PER_CYCLE
+        return result
+
+    @staticmethod
+    def _default_adapter(scenario: BenchmarkScenario) -> WorldInterface:
+        """Build a MockWorldAdapter from a scenario's starting state."""
+        return MockWorldAdapter(
+            location=scenario.start_location,
+            entities=list(scenario.entities),
+            events=list(scenario.events),
+        )
+
+    @staticmethod
+    def _get_current_location(adapter: WorldInterface) -> str:
+        """Read the current location from the adapter."""
+        try:
+            perception = adapter.observe()
+            return perception.location
+        except Exception:
+            return ""
+
+    @staticmethod
+    def _git_sha() -> str:
+        """Best-effort: return the current git commit SHA."""
+        try:
+            result = subprocess.run(
+                ["git", "rev-parse", "--short", "HEAD"],
+                capture_output=True,
+                text=True,
+                timeout=5,
+            )
+            return result.stdout.strip() if result.returncode == 0 else ""
+        except (OSError, subprocess.TimeoutExpired):
+            return ""
diff --git a/src/infrastructure/world/benchmark/scenarios.py b/src/infrastructure/world/benchmark/scenarios.py
new file mode 100644
index 00000000..4f0ef1c7
--- /dev/null
+++ b/src/infrastructure/world/benchmark/scenarios.py
@@ -0,0 +1,160 @@
+"""Benchmark scenario definitions for Morrowind agent regression testing.
+
+Each scenario specifies a starting location, goal conditions, world state
+(entities, events), and maximum cycles allowed.  The runner feeds these
+into the heartbeat loop and checks completion against the goal predicate.
+"""
+
+from __future__ import annotations
+
+from collections.abc import Callable
+from dataclasses import dataclass, field
+
+
+@dataclass(frozen=True)
+class BenchmarkScenario:
+    """A reproducible agent task used to detect performance regressions.
+
+    Attributes:
+        name:           Human-readable scenario name.
+        description:    What the scenario tests.
+        start_location: Where the agent begins.
+        goal_location:  Target location (if navigation scenario).
+        entities:       NPCs / objects present in the world.
+        events:         Game events injected each cycle.
+        max_cycles:     Hard cap on heartbeat cycles before failure.
+        goal_predicate: Optional callable ``(actions, location) -> bool``
+                        evaluated after each cycle to check early success.
+        tags:           Freeform tags for filtering (e.g. "navigation", "quest").
+    """
+
+    name: str
+    description: str
+    start_location: str
+    goal_location: str = ""
+    entities: list[str] = field(default_factory=list)
+    events: list[str] = field(default_factory=list)
+    max_cycles: int = 50
+    goal_predicate: Callable | None = None
+    tags: list[str] = field(default_factory=list)
+
+
+# ---------------------------------------------------------------------------
+# Goal predicates
+# ---------------------------------------------------------------------------
+
+
+def _reached_location(target: str) -> Callable:
+    """Return a predicate that checks whether the agent reached *target*."""
+
+    def predicate(actions: list[dict], current_location: str) -> bool:
+        return current_location.lower() == target.lower()
+
+    return predicate
+
+
+def _interacted_with(npc: str) -> Callable:
+    """Return a predicate that checks for a speak/interact action with *npc*."""
+
+    def predicate(actions: list[dict], current_location: str) -> bool:
+        for act in actions:
+            if act.get("action") in ("speak", "interact", "talk"):
+                if act.get("target", "").lower() == npc.lower():
+                    return True
+        return False
+
+    return predicate
+
+
+# ---------------------------------------------------------------------------
+# Built-in scenarios
+# ---------------------------------------------------------------------------
+
+BUILTIN_SCENARIOS: list[BenchmarkScenario] = [
+    BenchmarkScenario(
+        name="Walk Seyda Neen to Balmora",
+        description=(
+            "Navigate from the starting village to Balmora via the road. "
+            "Tests basic navigation and pathfinding."
+        ),
+        start_location="Seyda Neen",
+        goal_location="Balmora",
+        entities=["Silt Strider", "Road Sign", "Mudcrab"],
+        events=["player_spawned"],
+        max_cycles=30,
+        goal_predicate=_reached_location("Balmora"),
+        tags=["navigation", "basic"],
+    ),
+    BenchmarkScenario(
+        name="Fargoth's Ring",
+        description=(
+            "Complete the Fargoth quest: find Fargoth, receive the ring, "
+            "and return it.  Tests NPC interaction and quest logic."
+        ),
+        start_location="Seyda Neen",
+        goal_location="Seyda Neen",
+        entities=["Fargoth", "Arrille", "Guard"],
+        events=["quest_available:fargoth_ring"],
+        max_cycles=40,
+        goal_predicate=_interacted_with("Fargoth"),
+        tags=["quest", "npc_interaction"],
+    ),
+    BenchmarkScenario(
+        name="Balmora Guild Navigation",
+        description=(
+            "Walk from Balmora South Wall Corner Club to the Fighters Guild. "
+            "Tests intra-city navigation with multiple NPCs present."
+        ),
+        start_location="Balmora, South Wall Corner Club",
+        goal_location="Balmora, Fighters Guild",
+        entities=["Guard", "Merchant", "Caius Cosades"],
+        events=["player_entered"],
+        max_cycles=20,
+        goal_predicate=_reached_location("Balmora, Fighters Guild"),
+        tags=["navigation", "city"],
+    ),
+    BenchmarkScenario(
+        name="Combat Encounter — Mudcrab",
+        description=(
+            "Engage and defeat a single Mudcrab on the road between "
+            "Seyda Neen and Balmora.  Tests combat action selection."
+        ),
+        start_location="Bitter Coast Road",
+        goal_location="Bitter Coast Road",
+        entities=["Mudcrab"],
+        events=["hostile_entity_nearby"],
+        max_cycles=15,
+        goal_predicate=None,  # Success = survived max_cycles without crash
+        tags=["combat", "basic"],
+    ),
+    BenchmarkScenario(
+        name="Passive Observation — Balmora Market",
+        description=(
+            "Observe the Balmora market for 10 cycles without acting. "
+            "Tests that the agent can reason without unnecessary actions."
+        ),
+        start_location="Balmora, Market Square",
+        goal_location="",
+        entities=["Merchant", "Guard", "Pilgrim", "Trader"],
+        events=["market_day"],
+        max_cycles=10,
+        tags=["observation", "passive"],
+    ),
+]
+
+
+def load_scenarios(
+    tags: list[str] | None = None,
+) -> list[BenchmarkScenario]:
+    """Return built-in scenarios, optionally filtered by tags.
+
+    Args:
+        tags: If provided, only return scenarios whose tags overlap.
+
+    Returns:
+        List of matching ``BenchmarkScenario`` instances.
+    """
+    if tags is None:
+        return list(BUILTIN_SCENARIOS)
+    tag_set = set(tags)
+    return [s for s in BUILTIN_SCENARIOS if tag_set & set(s.tags)]
diff --git a/tests/conftest.py b/tests/conftest.py
index 3db5de56..bf684f69 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -147,10 +147,12 @@ def clean_database(tmp_path):
     # IMPORTANT: swarm.task_queue.models also has a DB_PATH that writes to
     # tasks.db — it MUST be patched too, or error_capture.capture_error()
     # will write test data to the production database.
+    tmp_sovereignty_db = tmp_path / "sovereignty_metrics.db"
     for mod_name, tmp_db in [
         ("dashboard.routes.tasks", tmp_tasks_db),
         ("dashboard.routes.work_orders", tmp_work_orders_db),
         ("swarm.task_queue.models", tmp_tasks_db),
+        ("infrastructure.sovereignty_metrics", tmp_sovereignty_db),
     ]:
         try:
             mod = __import__(mod_name, fromlist=["DB_PATH"])
diff --git a/tests/infrastructure/test_moderation.py b/tests/infrastructure/test_moderation.py
new file mode 100644
index 00000000..9ac59129
--- /dev/null
+++ b/tests/infrastructure/test_moderation.py
@@ -0,0 +1,334 @@
+"""Tests for the content moderation pipeline."""
+
+from unittest.mock import AsyncMock, patch
+
+import pytest
+
+from infrastructure.guards.moderation import (
+    ContentModerator,
+    GameProfile,
+    ModerationResult,
+    ModerationVerdict,
+    ViolationCategory,
+    _parse_guard_category,
+    get_moderator,
+)
+
+# ── Unit tests for data types ────────────────────────────────────────────────
+
+
+class TestModerationResult:
+    """Test ModerationResult dataclass."""
+
+    def test_passed_property_true(self):
+        result = ModerationResult(verdict=ModerationVerdict.PASS, blocked=False)
+        assert result.passed is True
+
+    def test_passed_property_false(self):
+        result = ModerationResult(verdict=ModerationVerdict.FAIL, blocked=True)
+        assert result.passed is False
+
+    def test_default_values(self):
+        result = ModerationResult(verdict=ModerationVerdict.PASS, blocked=False)
+        assert result.category == ViolationCategory.NONE
+        assert result.confidence == 0.0
+        assert result.fallback == ""
+        assert result.reason == ""
+
+
+class TestGameProfile:
+    """Test GameProfile dataclass."""
+
+    def test_default_values(self):
+        profile = GameProfile(game_id="test", display_name="Test Game")
+        assert profile.vocabulary_whitelist == []
+        assert profile.threshold == 0.8
+        assert profile.fallbacks == {}
+
+    def test_morrowind_profile(self):
+        profile = GameProfile(
+            game_id="morrowind",
+            display_name="Morrowind",
+            vocabulary_whitelist=["Skooma", "slave"],
+            threshold=0.85,
+        )
+        assert "Skooma" in profile.vocabulary_whitelist
+        assert profile.threshold == 0.85
+
+
+class TestParseGuardCategory:
+    """Test Llama Guard category parsing."""
+
+    def test_hate_speech(self):
+        assert _parse_guard_category("S1: Hate speech") == ViolationCategory.HATE_SPEECH
+
+    def test_violence(self):
+        assert _parse_guard_category("S2: Violence") == ViolationCategory.VIOLENCE_GLORIFICATION
+
+    def test_sexual_content(self):
+        assert _parse_guard_category("S3: Sexual content") == ViolationCategory.SEXUAL_CONTENT
+
+    def test_self_harm(self):
+        assert _parse_guard_category("S4: Self-harm") == ViolationCategory.SELF_HARM
+
+    def test_dangerous(self):
+        assert _parse_guard_category("S5: Dangerous activity") == ViolationCategory.REAL_WORLD_HARM
+
+    def test_unknown_category(self):
+        assert _parse_guard_category("S99: Unknown") == ViolationCategory.NONE
+
+
+# ── ContentModerator tests ───────────────────────────────────────────────────
+
+
+class TestContentModerator:
+    """Test the content moderation pipeline."""
+
+    def _make_moderator(self, **kwargs) -> ContentModerator:
+        """Create a moderator with test defaults."""
+        profiles = {
+            "morrowind": GameProfile(
+                game_id="morrowind",
+                display_name="Morrowind",
+                vocabulary_whitelist=["Skooma", "Moon Sugar", "slave", "Morag Tong"],
+                context_prompt="Narrate Morrowind gameplay.",
+                threshold=0.85,
+                fallbacks={
+                    "combat": "The battle continues.",
+                    "default": "The adventure continues.",
+                },
+            ),
+            "default": GameProfile(
+                game_id="default",
+                display_name="Generic",
+                vocabulary_whitelist=[],
+                context_prompt="Narrate gameplay.",
+                threshold=0.8,
+                fallbacks={"default": "Gameplay continues."},
+            ),
+        }
+        return ContentModerator(profiles=profiles, **kwargs)
+
+    def test_get_profile_known_game(self):
+        mod = self._make_moderator()
+        profile = mod.get_profile("morrowind")
+        assert profile.game_id == "morrowind"
+
+    def test_get_profile_unknown_game_falls_back(self):
+        mod = self._make_moderator()
+        profile = mod.get_profile("unknown_game")
+        assert profile.game_id == "default"
+
+    def test_get_context_prompt(self):
+        mod = self._make_moderator()
+        prompt = mod.get_context_prompt("morrowind")
+        assert "Morrowind" in prompt
+
+    def test_register_profile(self):
+        mod = self._make_moderator()
+        new_profile = GameProfile(game_id="skyrim", display_name="Skyrim")
+        mod.register_profile(new_profile)
+        assert mod.get_profile("skyrim").game_id == "skyrim"
+
+    def test_whitelist_replaces_game_terms(self):
+        mod = self._make_moderator()
+        profile = mod.get_profile("morrowind")
+        cleaned = mod._apply_whitelist(
+            "The merchant sells Skooma and Moon Sugar in the slave market.",
+            profile,
+        )
+        assert "Skooma" not in cleaned
+        assert "Moon Sugar" not in cleaned
+        assert "slave" not in cleaned
+        assert "[GAME_TERM]" in cleaned
+
+    def test_whitelist_case_insensitive(self):
+        mod = self._make_moderator()
+        profile = mod.get_profile("morrowind")
+        cleaned = mod._apply_whitelist("skooma and SKOOMA", profile)
+        assert "skooma" not in cleaned
+        assert "SKOOMA" not in cleaned
+
+    @pytest.mark.asyncio
+    async def test_check_safe_content_passes(self):
+        """Safe content should pass moderation."""
+        mod = self._make_moderator()
+        with patch.object(mod, "_is_guard_available", new_callable=AsyncMock, return_value=False):
+            result = await mod.check("The player walks through the town.", game="morrowind")
+        assert result.passed
+        assert not result.blocked
+
+    @pytest.mark.asyncio
+    async def test_check_blocked_content_has_fallback(self):
+        """Blocked content should include scene-appropriate fallback."""
+        mod = self._make_moderator()
+        # Force a block via regex by using real-world harm language
+        text = "In real life you should attack and hurt people"
+        with patch.object(mod, "_is_guard_available", new_callable=AsyncMock, return_value=False):
+            result = await mod.check(text, game="morrowind", scene_type="combat")
+        assert result.blocked
+        assert result.fallback == "The battle continues."
+
+    @pytest.mark.asyncio
+    async def test_check_with_moderation_disabled(self):
+        """When moderation is disabled, everything passes."""
+        mod = self._make_moderator()
+        with patch("infrastructure.guards.moderation.settings") as mock_settings:
+            mock_settings.moderation_enabled = False
+            mock_settings.moderation_guard_model = "llama-guard3:1b"
+            mock_settings.normalized_ollama_url = "http://127.0.0.1:11434"
+            result = await mod.check("anything goes here")
+        assert result.passed
+        assert result.layer == "disabled"
+
+    @pytest.mark.asyncio
+    async def test_threshold_below_allows_content(self):
+        """Content flagged below threshold should pass through (Layer 3)."""
+        mod = self._make_moderator()
+        # Mock the guard to return a low-confidence flag
+        low_conf_result = ModerationResult(
+            verdict=ModerationVerdict.FAIL,
+            blocked=True,
+            confidence=0.5,  # Below morrowind threshold of 0.85
+            layer="llama_guard",
+            category=ViolationCategory.VIOLENCE_GLORIFICATION,
+        )
+        with patch.object(
+            mod, "_run_guard", new_callable=AsyncMock, return_value=low_conf_result
+        ):
+            result = await mod.check("sword fight scene", game="morrowind")
+        assert result.passed
+        assert not result.blocked
+        assert result.layer == "threshold"
+
+    @pytest.mark.asyncio
+    async def test_threshold_above_blocks_content(self):
+        """Content flagged above threshold should remain blocked."""
+        mod = self._make_moderator()
+        high_conf_result = ModerationResult(
+            verdict=ModerationVerdict.FAIL,
+            blocked=True,
+            confidence=0.95,  # Above morrowind threshold of 0.85
+            layer="llama_guard",
+            category=ViolationCategory.REAL_WORLD_HARM,
+        )
+        with patch.object(
+            mod, "_run_guard", new_callable=AsyncMock, return_value=high_conf_result
+        ):
+            result = await mod.check("harmful content", game="morrowind")
+        assert result.blocked
+
+    def test_regex_catches_real_world_harm(self):
+        """Regex fallback should catch obvious real-world harm patterns."""
+        mod = self._make_moderator()
+        result = mod._check_with_regex("you should actually harm real people")
+        assert result.blocked
+        assert result.category == ViolationCategory.REAL_WORLD_HARM
+        assert result.layer == "regex_fallback"
+
+    def test_regex_passes_game_violence(self):
+        """Regex should not flag in-game violence narration."""
+        mod = self._make_moderator()
+        result = mod._check_with_regex(
+            "The warrior slays the dragon with a mighty blow."
+        )
+        assert result.passed
+
+    def test_regex_passes_normal_narration(self):
+        """Normal narration should pass regex checks."""
+        mod = self._make_moderator()
+        result = mod._check_with_regex(
+            "The Nerevarine enters the city of Balmora and speaks with Caius Cosades."
+        )
+        assert result.passed
+
+    def test_metrics_tracking(self):
+        """Metrics should track checks accurately."""
+        mod = self._make_moderator()
+        assert mod.get_metrics()["total_checks"] == 0
+
+    @pytest.mark.asyncio
+    async def test_metrics_increment_after_check(self):
+        """Metrics should increment after moderation checks."""
+        mod = self._make_moderator()
+        with patch.object(mod, "_is_guard_available", new_callable=AsyncMock, return_value=False):
+            await mod.check("safe text", game="default")
+        metrics = mod.get_metrics()
+        assert metrics["total_checks"] == 1
+        assert metrics["passed"] == 1
+
+    @pytest.mark.asyncio
+    async def test_guard_fallback_on_error(self):
+        """Should fall back to regex when guard model errors."""
+        mod = self._make_moderator()
+        with patch.object(
+            mod, "_is_guard_available", new_callable=AsyncMock, return_value=True
+        ), patch.object(
+            mod, "_check_with_guard", new_callable=AsyncMock, side_effect=RuntimeError("timeout")
+        ):
+            result = await mod.check("safe text", game="default")
+        # Should fall back to regex and pass
+        assert result.passed
+        assert result.layer == "regex_fallback"
+
+
+class TestGetModerator:
+    """Test the singleton accessor."""
+
+    def test_returns_same_instance(self):
+        """get_moderator should return the same instance."""
+        # Reset the global to test fresh
+        import infrastructure.guards.moderation as mod_module
+
+        mod_module._moderator = None
+        m1 = get_moderator()
+        m2 = get_moderator()
+        assert m1 is m2
+        # Clean up
+        mod_module._moderator = None
+
+
+# ── Profile loader tests ────────────────────────────────────────────────────
+
+
+class TestProfileLoader:
+    """Test YAML profile loading."""
+
+    def test_load_missing_file_returns_empty(self, tmp_path):
+        from infrastructure.guards.profiles import load_profiles
+
+        result = load_profiles(tmp_path / "nonexistent.yaml")
+        assert result == {}
+
+    def test_load_valid_config(self, tmp_path):
+        import yaml
+
+        from infrastructure.guards.profiles import load_profiles
+
+        config = {
+            "profiles": {
+                "testgame": {
+                    "display_name": "Test Game",
+                    "threshold": 0.9,
+                    "vocabulary_whitelist": ["sword", "potion"],
+                    "context_prompt": "Narrate test game.",
+                    "fallbacks": {"default": "Game continues."},
+                }
+            }
+        }
+        config_file = tmp_path / "moderation.yaml"
+        config_file.write_text(yaml.dump(config))
+
+        profiles = load_profiles(config_file)
+        assert "testgame" in profiles
+        assert profiles["testgame"].threshold == 0.9
+        assert "sword" in profiles["testgame"].vocabulary_whitelist
+
+    def test_load_malformed_yaml_returns_empty(self, tmp_path):
+        from infrastructure.guards.profiles import load_profiles
+
+        config_file = tmp_path / "moderation.yaml"
+        config_file.write_text("{{{{invalid yaml")
+
+        result = load_profiles(config_file)
+        assert result == {}
diff --git a/tests/infrastructure/test_sovereignty_metrics.py b/tests/infrastructure/test_sovereignty_metrics.py
new file mode 100644
index 00000000..8acb4a0a
--- /dev/null
+++ b/tests/infrastructure/test_sovereignty_metrics.py
@@ -0,0 +1,177 @@
+"""Tests for the sovereignty metrics store and API routes.
+
+Refs: #981
+"""
+
+from unittest.mock import AsyncMock, patch
+
+import pytest
+
+from infrastructure.sovereignty_metrics import (
+    GRADUATION_TARGETS,
+    SovereigntyMetric,
+    SovereigntyMetricsStore,
+    emit_sovereignty_metric,
+)
+
+
+@pytest.fixture
+def store(tmp_path):
+    """Create a fresh sovereignty metrics store with a temp DB."""
+    return SovereigntyMetricsStore(db_path=tmp_path / "test_sov.db")
+
+
+class TestSovereigntyMetricsStore:
+    def test_record_and_get_latest(self, store):
+        metric = SovereigntyMetric(metric_type="cache_hit_rate", value=0.42)
+        store.record(metric)
+
+        results = store.get_latest("cache_hit_rate", limit=10)
+        assert len(results) == 1
+        assert results[0]["value"] == 0.42
+
+    def test_get_latest_returns_most_recent_first(self, store):
+        for val in [0.1, 0.2, 0.3]:
+            store.record(SovereigntyMetric(metric_type="cache_hit_rate", value=val))
+
+        results = store.get_latest("cache_hit_rate", limit=10)
+        assert len(results) == 3
+        assert results[0]["value"] == 0.3  # most recent first
+
+    def test_get_latest_respects_limit(self, store):
+        for i in range(10):
+            store.record(SovereigntyMetric(metric_type="api_cost", value=float(i)))
+
+        results = store.get_latest("api_cost", limit=3)
+        assert len(results) == 3
+
+    def test_get_latest_filters_by_type(self, store):
+        store.record(SovereigntyMetric(metric_type="cache_hit_rate", value=0.5))
+        store.record(SovereigntyMetric(metric_type="api_cost", value=1.20))
+
+        results = store.get_latest("cache_hit_rate")
+        assert len(results) == 1
+        assert results[0]["value"] == 0.5
+
+    def test_get_summary_empty(self, store):
+        summary = store.get_summary()
+        assert "cache_hit_rate" in summary
+        assert summary["cache_hit_rate"]["current"] is None
+        assert summary["cache_hit_rate"]["phase"] == "pre-start"
+
+    def test_get_summary_with_data(self, store):
+        store.record(SovereigntyMetric(metric_type="cache_hit_rate", value=0.85))
+        store.record(SovereigntyMetric(metric_type="api_cost", value=0.08))
+
+        summary = store.get_summary()
+        assert summary["cache_hit_rate"]["current"] == 0.85
+        assert summary["cache_hit_rate"]["phase"] == "month3"
+        assert summary["api_cost"]["current"] == 0.08
+        assert summary["api_cost"]["phase"] == "month3"
+
+    def test_get_summary_graduation(self, store):
+        store.record(SovereigntyMetric(metric_type="cache_hit_rate", value=0.95))
+        summary = store.get_summary()
+        assert summary["cache_hit_rate"]["phase"] == "graduated"
+
+    def test_alert_on_high_api_cost(self, store):
+        """API cost above threshold triggers an alert."""
+        with patch("infrastructure.sovereignty_metrics.settings") as mock_settings:
+            mock_settings.sovereignty_api_cost_alert_threshold = 1.00
+            mock_settings.db_busy_timeout_ms = 5000
+            store.record(SovereigntyMetric(metric_type="api_cost", value=2.50))
+
+        alerts = store.get_alerts(unacknowledged_only=True)
+        assert len(alerts) == 1
+        assert alerts[0]["alert_type"] == "api_cost_exceeded"
+        assert alerts[0]["value"] == 2.50
+
+    def test_no_alert_below_threshold(self, store):
+        """API cost below threshold does not trigger an alert."""
+        with patch("infrastructure.sovereignty_metrics.settings") as mock_settings:
+            mock_settings.sovereignty_api_cost_alert_threshold = 1.00
+            mock_settings.db_busy_timeout_ms = 5000
+            store.record(SovereigntyMetric(metric_type="api_cost", value=0.50))
+
+        alerts = store.get_alerts(unacknowledged_only=True)
+        assert len(alerts) == 0
+
+    def test_acknowledge_alert(self, store):
+        with patch("infrastructure.sovereignty_metrics.settings") as mock_settings:
+            mock_settings.sovereignty_api_cost_alert_threshold = 0.50
+            mock_settings.db_busy_timeout_ms = 5000
+            store.record(SovereigntyMetric(metric_type="api_cost", value=1.00))
+
+        alerts = store.get_alerts(unacknowledged_only=True)
+        assert len(alerts) == 1
+
+        store.acknowledge_alert(alerts[0]["id"])
+        assert len(store.get_alerts(unacknowledged_only=True)) == 0
+        assert len(store.get_alerts(unacknowledged_only=False)) == 1
+
+    def test_metadata_preserved(self, store):
+        store.record(
+            SovereigntyMetric(
+                metric_type="cache_hit_rate",
+                value=0.5,
+                metadata={"source": "research_orchestrator"},
+            )
+        )
+        results = store.get_latest("cache_hit_rate")
+        assert results[0]["metadata"]["source"] == "research_orchestrator"
+
+    def test_summary_trend_data(self, store):
+        for v in [0.1, 0.2, 0.3]:
+            store.record(SovereigntyMetric(metric_type="cache_hit_rate", value=v))
+
+        summary = store.get_summary()
+        trend = summary["cache_hit_rate"]["trend"]
+        assert len(trend) == 3
+        assert trend[0]["v"] == 0.1  # oldest first (reversed)
+        assert trend[-1]["v"] == 0.3
+
+    def test_graduation_targets_complete(self):
+        """All expected metric types have graduation targets."""
+        expected = {"cache_hit_rate", "api_cost", "time_to_report", "human_involvement", "local_artifacts"}
+        assert set(GRADUATION_TARGETS.keys()) == expected
+
+
+class TestEmitSovereigntyMetric:
+    @pytest.mark.asyncio
+    async def test_emit_records_and_publishes(self, tmp_path):
+        """emit_sovereignty_metric records to store and publishes event."""
+        with (
+            patch("infrastructure.sovereignty_metrics._store", None),
+            patch(
+                "infrastructure.sovereignty_metrics.DB_PATH",
+                tmp_path / "emit_test.db",
+            ),
+            patch("infrastructure.events.bus.emit", new_callable=AsyncMock) as mock_emit,
+        ):
+            await emit_sovereignty_metric("cache_hit_rate", 0.75, {"source": "test"})
+
+            mock_emit.assert_called_once()
+            call_args = mock_emit.call_args
+            assert call_args[0][0] == "sovereignty.metric.cache_hit_rate"
+
+
+class TestSovereigntyMetricsRoutes:
+    def test_metrics_api_returns_200(self, client):
+        response = client.get("/sovereignty/metrics")
+        assert response.status_code == 200
+        data = response.json()
+        assert "metrics" in data
+        assert "alerts" in data
+        assert "targets" in data
+
+    def test_metrics_panel_returns_html(self, client):
+        response = client.get("/sovereignty/metrics/panel")
+        assert response.status_code == 200
+        assert "text/html" in response.headers["content-type"]
+
+    def test_alerts_api_returns_200(self, client):
+        response = client.get("/sovereignty/alerts")
+        assert response.status_code == 200
+        data = response.json()
+        assert "alerts" in data
+        assert "unacknowledged" in data
diff --git a/tests/infrastructure/world/test_benchmark.py b/tests/infrastructure/world/test_benchmark.py
new file mode 100644
index 00000000..bda0fc4c
--- /dev/null
+++ b/tests/infrastructure/world/test_benchmark.py
@@ -0,0 +1,394 @@
+"""Tests for the agent performance regression benchmark suite.
+
+Covers: scenario loading, metrics collection, runner execution,
+goal predicates, and result persistence.
+"""
+
+from __future__ import annotations
+
+import pytest
+
+from infrastructure.world.benchmark.metrics import (
+    BenchmarkMetrics,
+    ScenarioResult,
+    compare_runs,
+    load_history,
+)
+from infrastructure.world.benchmark.runner import BenchmarkRunner
+from infrastructure.world.benchmark.scenarios import (
+    BUILTIN_SCENARIOS,
+    BenchmarkScenario,
+    load_scenarios,
+)
+
+# ---------------------------------------------------------------------------
+# Scenario definitions
+# ---------------------------------------------------------------------------
+
+
+class TestBenchmarkScenario:
+    def test_builtin_scenarios_exist(self):
+        assert len(BUILTIN_SCENARIOS) >= 5
+
+    def test_scenario_fields(self):
+        s = BUILTIN_SCENARIOS[0]
+        assert s.name
+        assert s.description
+        assert s.start_location
+        assert s.max_cycles > 0
+
+    def test_load_all_scenarios(self):
+        scenarios = load_scenarios()
+        assert len(scenarios) == len(BUILTIN_SCENARIOS)
+
+    def test_load_scenarios_by_tag(self):
+        nav = load_scenarios(tags=["navigation"])
+        assert len(nav) >= 2
+        for s in nav:
+            assert "navigation" in s.tags
+
+    def test_load_scenarios_no_match(self):
+        result = load_scenarios(tags=["nonexistent_tag"])
+        assert result == []
+
+    def test_scenario_is_frozen(self):
+        s = BUILTIN_SCENARIOS[0]
+        with pytest.raises(AttributeError):
+            s.name = "modified"
+
+
+# ---------------------------------------------------------------------------
+# Goal predicates
+# ---------------------------------------------------------------------------
+
+
+class TestGoalPredicates:
+    def test_reached_location_predicate(self):
+        s = BUILTIN_SCENARIOS[0]  # Walk to Balmora
+        assert s.goal_predicate is not None
+        assert s.goal_predicate([], "Balmora") is True
+        assert s.goal_predicate([], "Seyda Neen") is False
+
+    def test_reached_location_case_insensitive(self):
+        s = BUILTIN_SCENARIOS[0]
+        assert s.goal_predicate([], "balmora") is True
+        assert s.goal_predicate([], "BALMORA") is True
+
+    def test_interacted_with_predicate(self):
+        s = BUILTIN_SCENARIOS[1]  # Fargoth quest
+        assert s.goal_predicate is not None
+        actions = [{"action": "speak", "target": "Fargoth"}]
+        assert s.goal_predicate(actions, "Seyda Neen") is True
+
+    def test_interacted_with_no_match(self):
+        s = BUILTIN_SCENARIOS[1]
+        actions = [{"action": "speak", "target": "Guard"}]
+        assert s.goal_predicate(actions, "Seyda Neen") is False
+
+    def test_interacted_with_interact_action(self):
+        s = BUILTIN_SCENARIOS[1]
+        actions = [{"action": "interact", "target": "Fargoth"}]
+        assert s.goal_predicate(actions, "Seyda Neen") is True
+
+    def test_no_predicate_scenario(self):
+        combat = [s for s in BUILTIN_SCENARIOS if "combat" in s.tags][0]
+        assert combat.goal_predicate is None
+
+
+# ---------------------------------------------------------------------------
+# Metrics
+# ---------------------------------------------------------------------------
+
+
+class TestScenarioResult:
+    def test_default_values(self):
+        r = ScenarioResult(scenario_name="test")
+        assert r.success is False
+        assert r.cycles_used == 0
+        assert r.llm_calls == 0
+        assert r.metabolic_cost == 0.0
+        assert r.error is None
+
+
+class TestBenchmarkMetrics:
+    def test_empty_metrics(self):
+        m = BenchmarkMetrics()
+        assert m.pass_count == 0
+        assert m.fail_count == 0
+        assert m.success_rate == 0.0
+        assert m.total_llm_calls == 0
+        assert m.total_metabolic_cost == 0.0
+
+    def test_success_rate(self):
+        m = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="a", success=True),
+                ScenarioResult(scenario_name="b", success=False),
+                ScenarioResult(scenario_name="c", success=True),
+            ]
+        )
+        assert m.pass_count == 2
+        assert m.fail_count == 1
+        assert abs(m.success_rate - 2 / 3) < 0.01
+
+    def test_totals(self):
+        m = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="a", llm_calls=10, metabolic_cost=30.0),
+                ScenarioResult(scenario_name="b", llm_calls=5, metabolic_cost=15.0),
+            ]
+        )
+        assert m.total_llm_calls == 15
+        assert m.total_metabolic_cost == 45.0
+
+    def test_save_and_load(self, tmp_path):
+        path = tmp_path / "bench.jsonl"
+        m = BenchmarkMetrics(
+            timestamp="2026-01-01T00:00:00",
+            commit_sha="abc123",
+            total_time_ms=1000,
+            results=[
+                ScenarioResult(
+                    scenario_name="a",
+                    success=True,
+                    cycles_used=5,
+                    max_cycles=10,
+                ),
+            ],
+        )
+        m.save(path)
+
+        history = load_history(path)
+        assert len(history) == 1
+        assert history[0]["commit_sha"] == "abc123"
+        assert history[0]["scenarios"][0]["scenario_name"] == "a"
+
+    def test_save_appends(self, tmp_path):
+        path = tmp_path / "bench.jsonl"
+        for i in range(3):
+            m = BenchmarkMetrics(
+                timestamp=f"2026-01-0{i + 1}T00:00:00",
+                results=[ScenarioResult(scenario_name=f"s{i}")],
+            )
+            m.save(path)
+
+        history = load_history(path)
+        assert len(history) == 3
+        # Most recent first
+        assert history[0]["timestamp"] == "2026-01-03T00:00:00"
+
+    def test_summary_output(self):
+        m = BenchmarkMetrics(
+            timestamp="2026-01-01T00:00:00",
+            commit_sha="abc123",
+            total_time_ms=500,
+            results=[
+                ScenarioResult(
+                    scenario_name="Walk Test",
+                    success=True,
+                    cycles_used=5,
+                    max_cycles=10,
+                    wall_time_ms=200,
+                    llm_calls=15,
+                ),
+            ],
+        )
+        summary = m.summary()
+        assert "Walk Test" in summary
+        assert "PASS" in summary
+        assert "abc123" in summary
+
+    def test_load_history_missing_file(self, tmp_path):
+        assert load_history(tmp_path / "nope.jsonl") == []
+
+    def test_load_history_corrupt_lines(self, tmp_path):
+        path = tmp_path / "bench.jsonl"
+        path.write_text('{"valid": true}\nnot json\n{"also": "valid"}\n')
+        history = load_history(path)
+        assert len(history) == 2
+
+
+# ---------------------------------------------------------------------------
+# Comparison
+# ---------------------------------------------------------------------------
+
+
+class TestCompareRuns:
+    def test_regression_detected(self):
+        baseline = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="walk", success=True, cycles_used=10),
+            ]
+        )
+        current = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="walk", success=False, cycles_used=10),
+            ]
+        )
+        report = compare_runs(current, baseline)
+        assert "REGRESSION" in report
+
+    def test_improvement_detected(self):
+        baseline = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="walk", success=False, cycles_used=10),
+            ]
+        )
+        current = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="walk", success=True, cycles_used=10),
+            ]
+        )
+        report = compare_runs(current, baseline)
+        assert "IMPROVEMENT" in report
+
+    def test_slower_detected(self):
+        baseline = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="walk", success=True, cycles_used=10),
+            ]
+        )
+        current = BenchmarkMetrics(
+            results=[
+                ScenarioResult(scenario_name="walk", success=True, cycles_used=20),
+            ]
+        )
+        report = compare_runs(current, baseline)
+        assert "SLOWER" in report
+
+    def test_new_scenario_noted(self):
+        baseline = BenchmarkMetrics(results=[])
+        current = BenchmarkMetrics(results=[ScenarioResult(scenario_name="new_one", success=True)])
+        report = compare_runs(current, baseline)
+        assert "NEW" in report
+
+
+# ---------------------------------------------------------------------------
+# Runner
+# ---------------------------------------------------------------------------
+
+
+class TestBenchmarkRunner:
+    @pytest.mark.asyncio
+    async def test_run_single_scenario(self):
+        """Runner executes a scenario and returns a result."""
+        scenario = BenchmarkScenario(
+            name="Test Walk",
+            description="Simple test",
+            start_location="A",
+            goal_location="A",
+            max_cycles=3,
+            tags=["test"],
+        )
+        runner = BenchmarkRunner()
+        metrics = await runner.run([scenario])
+        assert len(metrics.results) == 1
+        r = metrics.results[0]
+        assert r.scenario_name == "Test Walk"
+        assert r.cycles_used == 3  # no predicate, runs all cycles
+        assert r.success is True  # no predicate = success if survived
+        assert r.wall_time_ms >= 0
+        assert r.llm_calls == 9  # 3 cycles * 3 calls
+        assert r.metabolic_cost > 0
+
+    @pytest.mark.asyncio
+    async def test_run_with_goal_predicate(self):
+        """Runner stops early when goal predicate is satisfied."""
+
+        def always_true(actions, location):
+            return True
+
+        scenario = BenchmarkScenario(
+            name="Instant Win",
+            description="Predicate satisfied immediately",
+            start_location="A",
+            max_cycles=100,
+            goal_predicate=always_true,
+            tags=["test"],
+        )
+        runner = BenchmarkRunner()
+        metrics = await runner.run([scenario])
+        r = metrics.results[0]
+        assert r.success is True
+        assert r.cycles_used == 1  # Stopped at first cycle
+
+    @pytest.mark.asyncio
+    async def test_run_with_failing_predicate(self):
+        """Scenario fails when predicate never satisfied."""
+
+        def never_true(actions, location):
+            return False
+
+        scenario = BenchmarkScenario(
+            name="Impossible",
+            description="Predicate never satisfied",
+            start_location="A",
+            max_cycles=5,
+            goal_predicate=never_true,
+            tags=["test"],
+        )
+        runner = BenchmarkRunner()
+        metrics = await runner.run([scenario])
+        r = metrics.results[0]
+        assert r.success is False
+        assert r.cycles_used == 5
+
+    @pytest.mark.asyncio
+    async def test_run_multiple_scenarios(self):
+        """Runner handles multiple scenarios in sequence."""
+        scenarios = [
+            BenchmarkScenario(
+                name=f"Scenario {i}",
+                description=f"Test {i}",
+                start_location="A",
+                max_cycles=2,
+                tags=["test"],
+            )
+            for i in range(3)
+        ]
+        runner = BenchmarkRunner()
+        metrics = await runner.run(scenarios)
+        assert len(metrics.results) == 3
+        assert metrics.total_time_ms >= 0
+        assert metrics.timestamp
+
+    @pytest.mark.asyncio
+    async def test_metrics_commit_sha(self):
+        """Runner captures git SHA in metrics."""
+        scenario = BenchmarkScenario(
+            name="SHA Test",
+            description="Check SHA capture",
+            start_location="A",
+            max_cycles=1,
+            tags=["test"],
+        )
+        runner = BenchmarkRunner()
+        metrics = await runner.run([scenario])
+        # SHA may or may not be available in test env; just ensure no crash
+        assert isinstance(metrics.commit_sha, str)
+
+    @pytest.mark.asyncio
+    async def test_builtin_scenarios_run(self):
+        """All built-in scenarios run without crashing."""
+        # Use just 2 cycles each to keep tests fast
+        scenarios = [
+            BenchmarkScenario(
+                name=s.name,
+                description=s.description,
+                start_location=s.start_location,
+                goal_location=s.goal_location,
+                entities=list(s.entities),
+                events=list(s.events),
+                max_cycles=2,  # Override for speed
+                goal_predicate=None,  # Skip predicate for smoke test
+                tags=list(s.tags),
+            )
+            for s in BUILTIN_SCENARIOS
+        ]
+        runner = BenchmarkRunner()
+        metrics = await runner.run(scenarios)
+        assert len(metrics.results) == len(BUILTIN_SCENARIOS)
+        # All should succeed (no predicate + survived = pass)
+        for r in metrics.results:
+            assert r.success is True
+            assert r.error is None
diff --git a/tox.ini b/tox.ini
index 0be8d624..00cee66a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -87,6 +87,11 @@ description = Live LLM tests via Ollama (requires running Ollama)
 commands =
     pytest tests/ -q --tb=short -m ollama --timeout=120
 
+[testenv:benchmark]
+description = Agent performance regression benchmark suite
+commands =
+    python scripts/run_benchmarks.py {posargs}
+
 # ── CI / Coverage ────────────────────────────────────────────────────────────
 
 [testenv:ci]