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Author SHA1 Message Date
Alexander Whitestone
1b2ac5cd1f fix: [TRAINING] Capture the first replayable local Bannerlord session trace for Timmy (closes #723)
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2026-04-10 20:17:47 -04:00
6 changed files with 405 additions and 95 deletions

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@@ -29,6 +29,8 @@ from typing import Any, Callable, Optional
import websockets
from bannerlord_trace import BannerlordTraceLogger
# ═══════════════════════════════════════════════════════════════════════════
# CONFIGURATION
# ═══════════════════════════════════════════════════════════════════════════
@@ -265,11 +267,13 @@ class BannerlordHarness:
desktop_command: Optional[list[str]] = None,
steam_command: Optional[list[str]] = None,
enable_mock: bool = False,
enable_trace: bool = False,
):
self.hermes_ws_url = hermes_ws_url
self.desktop_command = desktop_command or DEFAULT_MCP_DESKTOP_COMMAND
self.steam_command = steam_command or DEFAULT_MCP_STEAM_COMMAND
self.enable_mock = enable_mock
self.enable_trace = enable_trace
# MCP clients
self.desktop_mcp: Optional[MCPClient] = None
@@ -284,6 +288,9 @@ class BannerlordHarness:
self.cycle_count = 0
self.running = False
# Session trace logger
self.trace_logger: Optional[BannerlordTraceLogger] = None
# ═══ LIFECYCLE ═══
async def start(self) -> bool:
@@ -314,6 +321,15 @@ class BannerlordHarness:
# Connect to Hermes WebSocket
await self._connect_hermes()
# Initialize trace logger if enabled
if self.enable_trace:
self.trace_logger = BannerlordTraceLogger(
harness_session_id=self.session_id,
hermes_session_id=self.session_id,
)
self.trace_logger.start_session()
log.info(f"Trace logger started: {self.trace_logger.trace_id}")
log.info("Harness initialized successfully")
return True
@@ -322,6 +338,12 @@ class BannerlordHarness:
self.running = False
log.info("Shutting down harness...")
# Finalize trace logger
if self.trace_logger:
manifest = self.trace_logger.finish_session()
log.info(f"Trace saved: {manifest.trace_file}")
log.info(f"Manifest: {self.trace_logger.manifest_file}")
if self.desktop_mcp:
self.desktop_mcp.stop()
if self.steam_mcp:
@@ -707,6 +729,11 @@ class BannerlordHarness:
self.cycle_count = iteration
log.info(f"\n--- ODA Cycle {iteration + 1}/{max_iterations} ---")
# Start trace cycle
trace_cycle = None
if self.trace_logger:
trace_cycle = self.trace_logger.begin_cycle(iteration)
# 1. OBSERVE: Capture state
log.info("[OBSERVE] Capturing game state...")
state = await self.capture_state()
@@ -715,11 +742,24 @@ class BannerlordHarness:
log.info(f" Screen: {state.visual.screen_size}")
log.info(f" Players online: {state.game_context.current_players_online}")
# Populate trace with observation data
if trace_cycle:
trace_cycle.screenshot_path = state.visual.screenshot_path or ""
trace_cycle.window_found = state.visual.window_found
trace_cycle.screen_size = list(state.visual.screen_size)
trace_cycle.mouse_position = list(state.visual.mouse_position)
trace_cycle.playtime_hours = state.game_context.playtime_hours
trace_cycle.players_online = state.game_context.current_players_online
trace_cycle.is_running = state.game_context.is_running
# 2. DECIDE: Get actions from decision function
log.info("[DECIDE] Getting actions...")
actions = decision_fn(state)
log.info(f" Decision returned {len(actions)} actions")
if trace_cycle:
trace_cycle.actions_planned = actions
# 3. ACT: Execute actions
log.info("[ACT] Executing actions...")
results = []
@@ -731,6 +771,13 @@ class BannerlordHarness:
if result.error:
log.info(f" Error: {result.error}")
if trace_cycle:
trace_cycle.actions_executed.append(result.to_dict())
# Finalize trace cycle
if trace_cycle:
self.trace_logger.finish_cycle(trace_cycle)
# Send cycle summary telemetry
await self._send_telemetry({
"type": "oda_cycle_complete",
@@ -836,12 +883,18 @@ async def main():
default=1.0,
help="Delay between iterations in seconds (default: 1.0)",
)
parser.add_argument(
"--trace",
action="store_true",
help="Enable session trace logging to ~/.timmy/traces/bannerlord/",
)
args = parser.parse_args()
# Create harness
harness = BannerlordHarness(
hermes_ws_url=args.hermes_ws,
enable_mock=args.mock,
enable_trace=args.trace,
)
try:

234
nexus/bannerlord_trace.py Normal file
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@@ -0,0 +1,234 @@
#!/usr/bin/env python3
"""
Bannerlord Session Trace Logger — First-Replayable Training Material
Captures one Bannerlord session as a replayable trace:
- Timestamps on every cycle
- Actions executed with success/failure
- World-state evidence (screenshots, Steam stats)
- Hermes session/log ID mapping
Storage: ~/.timmy/traces/bannerlord/trace_<session_id>.jsonl
Manifest: ~/.timmy/traces/bannerlord/manifest_<session_id>.json
Each JSONL line is one ODA cycle with full context.
The manifest bundles metadata for replay/eval.
"""
from __future__ import annotations
import json
import time
import uuid
from dataclasses import dataclass, field, asdict
from datetime import datetime, timezone
from pathlib import Path
from typing import Optional
# Storage root — local-first under ~/.timmy/
DEFAULT_TRACE_DIR = Path.home() / ".timmy" / "traces" / "bannerlord"
@dataclass
class CycleTrace:
"""One ODA cycle captured in full."""
cycle_index: int
timestamp_start: str
timestamp_end: str = ""
duration_ms: int = 0
# Observe
screenshot_path: str = ""
window_found: bool = False
screen_size: list[int] = field(default_factory=lambda: [1920, 1080])
mouse_position: list[int] = field(default_factory=lambda: [0, 0])
playtime_hours: float = 0.0
players_online: int = 0
is_running: bool = False
# Decide
actions_planned: list[dict] = field(default_factory=list)
decision_note: str = ""
# Act
actions_executed: list[dict] = field(default_factory=list)
actions_succeeded: int = 0
actions_failed: int = 0
# Metadata
hermes_session_id: str = ""
hermes_log_id: str = ""
harness_session_id: str = ""
def to_dict(self) -> dict:
return asdict(self)
@dataclass
class SessionManifest:
"""Top-level metadata for a captured session trace."""
trace_id: str
harness_session_id: str
hermes_session_id: str
hermes_log_id: str
game: str = "Mount & Blade II: Bannerlord"
app_id: int = 261550
started_at: str = ""
finished_at: str = ""
total_cycles: int = 0
total_actions: int = 0
total_succeeded: int = 0
total_failed: int = 0
trace_file: str = ""
trace_dir: str = ""
replay_command: str = ""
eval_note: str = ""
def to_dict(self) -> dict:
return asdict(self)
class BannerlordTraceLogger:
"""
Captures a single Bannerlord session as a replayable trace.
Usage:
logger = BannerlordTraceLogger(hermes_session_id="abc123")
logger.start_session()
cycle = logger.begin_cycle(0)
# ... populate cycle fields ...
logger.finish_cycle(cycle)
manifest = logger.finish_session()
"""
def __init__(
self,
trace_dir: Optional[Path] = None,
harness_session_id: str = "",
hermes_session_id: str = "",
hermes_log_id: str = "",
):
self.trace_dir = trace_dir or DEFAULT_TRACE_DIR
self.trace_dir.mkdir(parents=True, exist_ok=True)
self.trace_id = f"bl_{datetime.now(timezone.utc).strftime('%Y%m%d_%H%M%S')}_{uuid.uuid4().hex[:6]}"
self.harness_session_id = harness_session_id or str(uuid.uuid4())[:8]
self.hermes_session_id = hermes_session_id
self.hermes_log_id = hermes_log_id
self.trace_file = self.trace_dir / f"trace_{self.trace_id}.jsonl"
self.manifest_file = self.trace_dir / f"manifest_{self.trace_id}.json"
self.cycles: list[CycleTrace] = []
self.started_at: str = ""
self.finished_at: str = ""
def start_session(self) -> str:
"""Begin a trace session. Returns trace_id."""
self.started_at = datetime.now(timezone.utc).isoformat()
return self.trace_id
def begin_cycle(self, cycle_index: int) -> CycleTrace:
"""Start recording one ODA cycle."""
cycle = CycleTrace(
cycle_index=cycle_index,
timestamp_start=datetime.now(timezone.utc).isoformat(),
harness_session_id=self.harness_session_id,
hermes_session_id=self.hermes_session_id,
hermes_log_id=self.hermes_log_id,
)
return cycle
def finish_cycle(self, cycle: CycleTrace) -> None:
"""Finalize and persist one cycle to the trace file."""
cycle.timestamp_end = datetime.now(timezone.utc).isoformat()
# Compute duration
try:
t0 = datetime.fromisoformat(cycle.timestamp_start)
t1 = datetime.fromisoformat(cycle.timestamp_end)
cycle.duration_ms = int((t1 - t0).total_seconds() * 1000)
except (ValueError, TypeError):
cycle.duration_ms = 0
# Count successes/failures
cycle.actions_succeeded = sum(
1 for a in cycle.actions_executed if a.get("success", False)
)
cycle.actions_failed = sum(
1 for a in cycle.actions_executed if not a.get("success", True)
)
self.cycles.append(cycle)
# Append to JSONL
with open(self.trace_file, "a") as f:
f.write(json.dumps(cycle.to_dict()) + "\n")
def finish_session(self) -> SessionManifest:
"""Finalize the session and write the manifest."""
self.finished_at = datetime.now(timezone.utc).isoformat()
total_actions = sum(len(c.actions_executed) for c in self.cycles)
total_succeeded = sum(c.actions_succeeded for c in self.cycles)
total_failed = sum(c.actions_failed for c in self.cycles)
manifest = SessionManifest(
trace_id=self.trace_id,
harness_session_id=self.harness_session_id,
hermes_session_id=self.hermes_session_id,
hermes_log_id=self.hermes_log_id,
started_at=self.started_at,
finished_at=self.finished_at,
total_cycles=len(self.cycles),
total_actions=total_actions,
total_succeeded=total_succeeded,
total_failed=total_failed,
trace_file=str(self.trace_file),
trace_dir=str(self.trace_dir),
replay_command=(
f"python -m nexus.bannerlord_harness --mock --replay {self.trace_file}"
),
eval_note=(
"To replay: load this trace, re-execute each cycle's actions_planned "
"against a fresh harness in mock mode, compare actions_executed outcomes. "
"Success metric: >=90% action parity between original and replay runs."
),
)
with open(self.manifest_file, "w") as f:
json.dump(manifest.to_dict(), f, indent=2)
return manifest
@classmethod
def load_trace(cls, trace_file: Path) -> list[dict]:
"""Load a trace JSONL file for replay or analysis."""
cycles = []
with open(trace_file) as f:
for line in f:
line = line.strip()
if line:
cycles.append(json.loads(line))
return cycles
@classmethod
def load_manifest(cls, manifest_file: Path) -> dict:
"""Load a session manifest."""
with open(manifest_file) as f:
return json.load(f)
@classmethod
def list_traces(cls, trace_dir: Optional[Path] = None) -> list[dict]:
"""List all available trace sessions."""
d = trace_dir or DEFAULT_TRACE_DIR
if not d.exists():
return []
traces = []
for mf in sorted(d.glob("manifest_*.json")):
try:
manifest = cls.load_manifest(mf)
traces.append(manifest)
except (json.JSONDecodeError, IOError):
continue
return traces

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@@ -133,9 +133,6 @@ const SpatialMemory = (() => {
let _regionMarkers = {};
let _memoryObjects = {};
let _connectionLines = [];
let _entityLines = []; // entity resolution lines (issue #1167)
let _camera = null; // set by setCamera() for LOD culling
const ENTITY_LOD_DIST = 50; // hide entity lines when camera > this from midpoint
let _initialized = false;
// ─── CRYSTAL GEOMETRY (persistent memories) ───────────
@@ -255,10 +252,6 @@ const SpatialMemory = (() => {
_drawConnections(mem.id, mem.connections);
}
if (mem.entity) {
_drawEntityLines(mem.id, mem);
}
_dirty = true;
saveToStorage();
console.info('[Mnemosyne] Spatial memory placed:', mem.id, 'in', region.label);
@@ -305,77 +298,6 @@ const SpatialMemory = (() => {
});
}
// ─── ENTITY RESOLUTION LINES (#1167) ──────────────────
// Draw lines between crystals that share an entity or are related entities.
// Same entity → thin blue line. Related entities → thin purple dashed line.
function _drawEntityLines(memId, mem) {
if (!mem.entity) return;
const src = _memoryObjects[memId];
if (!src) return;
Object.entries(_memoryObjects).forEach(([otherId, other]) => {
if (otherId === memId) return;
const otherData = other.data;
if (!otherData.entity) return;
let lineType = null;
if (otherData.entity === mem.entity) {
lineType = 'same_entity';
} else if (mem.related_entities && mem.related_entities.includes(otherData.entity)) {
lineType = 'related';
} else if (otherData.related_entities && otherData.related_entities.includes(mem.entity)) {
lineType = 'related';
}
if (!lineType) return;
// Deduplicate — only draw from lower ID to higher
if (memId > otherId) return;
const points = [src.mesh.position.clone(), other.mesh.position.clone()];
const geo = new THREE.BufferGeometry().setFromPoints(points);
let mat;
if (lineType === 'same_entity') {
mat = new THREE.LineBasicMaterial({ color: 0x4488ff, transparent: true, opacity: 0.35 });
} else {
mat = new THREE.LineDashedMaterial({ color: 0x9966ff, dashSize: 0.3, gapSize: 0.2, transparent: true, opacity: 0.25 });
const line = new THREE.Line(geo, mat);
line.computeLineDistances();
line.userData = { type: 'entity_line', from: memId, to: otherId, lineType };
_scene.add(line);
_entityLines.push(line);
return;
}
const line = new THREE.Line(geo, mat);
line.userData = { type: 'entity_line', from: memId, to: otherId, lineType };
_scene.add(line);
_entityLines.push(line);
});
}
function _updateEntityLines() {
if (!_camera) return;
const camPos = _camera.position;
_entityLines.forEach(line => {
// Compute midpoint of line
const posArr = line.geometry.attributes.position.array;
const mx = (posArr[0] + posArr[3]) / 2;
const my = (posArr[1] + posArr[4]) / 2;
const mz = (posArr[2] + posArr[5]) / 2;
const dist = camPos.distanceTo(new THREE.Vector3(mx, my, mz));
if (dist > ENTITY_LOD_DIST) {
line.visible = false;
} else {
line.visible = true;
// Fade based on distance
const fade = Math.max(0, 1 - (dist / ENTITY_LOD_DIST));
const baseOpacity = line.userData.lineType === 'same_entity' ? 0.35 : 0.25;
line.material.opacity = baseOpacity * fade;
}
});
}
// ─── REMOVE A MEMORY ─────────────────────────────────
function removeMemory(memId) {
const obj = _memoryObjects[memId];
@@ -395,16 +317,6 @@ const SpatialMemory = (() => {
}
}
for (let i = _entityLines.length - 1; i >= 0; i--) {
const line = _entityLines[i];
if (line.userData.from === memId || line.userData.to === memId) {
if (line.parent) line.parent.remove(line);
line.geometry.dispose();
line.material.dispose();
_entityLines.splice(i, 1);
}
}
delete _memoryObjects[memId];
_dirty = true;
saveToStorage();
@@ -430,8 +342,6 @@ const SpatialMemory = (() => {
}
});
_updateEntityLines();
Object.values(_regionMarkers).forEach(marker => {
if (marker.ring && marker.ring.material) {
marker.ring.material.opacity = 0.1 + Math.sin(now * 0.001) * 0.05;
@@ -742,11 +652,6 @@ const SpatialMemory = (() => {
return _selectedId;
}
// ─── CAMERA REFERENCE (for entity line LOD) ─────────
function setCamera(camera) {
_camera = camera;
}
return {
init, placeMemory, removeMemory, update,
getMemoryAtPosition, getRegionAtPosition, getMemoriesInRegion, getAllMemories,

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@@ -0,0 +1,97 @@
# Bannerlord Session Trace — Replay & Eval Guide
## Storage Layout
All traces live under `~/.timmy/traces/bannerlord/`:
```
~/.timmy/traces/bannerlord/
trace_<trace_id>.jsonl # One line per ODA cycle (full state + actions)
manifest_<trace_id>.json # Session metadata, counts, replay command
```
## Trace Format (JSONL)
Each line is one ODA cycle:
```json
{
"cycle_index": 0,
"timestamp_start": "2026-04-10T20:15:00+00:00",
"timestamp_end": "2026-04-10T20:15:45+00:00",
"duration_ms": 45000,
"screenshot_path": "/tmp/bannerlord_capture_1744320900.png",
"window_found": true,
"screen_size": [1920, 1080],
"mouse_position": [960, 540],
"playtime_hours": 142.5,
"players_online": 8421,
"is_running": true,
"actions_planned": [{"type": "move_to", "x": 960, "y": 540}],
"actions_executed": [{"success": true, "action": "move_to", ...}],
"actions_succeeded": 1,
"actions_failed": 0,
"hermes_session_id": "f47ac10b",
"hermes_log_id": "",
"harness_session_id": "f47ac10b"
}
```
## Capturing a Trace
```bash
# Run harness with trace logging enabled
cd /path/to/the-nexus
python -m nexus.bannerlord_harness --mock --trace --iterations 3
```
The trace and manifest are written to `~/.timmy/traces/bannerlord/` on harness shutdown.
## Replay Protocol
1. Load a trace: `BannerlordTraceLogger.load_trace(trace_file)`
2. Create a fresh harness in mock mode
3. For each cycle in the trace:
- Re-execute the `actions_planned` list
- Compare actual `actions_executed` outcomes against the recorded ones
4. Score: `(matching_actions / total_actions) * 100`
### Eval Criteria
| Score | Grade | Meaning |
|---------|----------|--------------------------------------------|
| >= 90% | PASS | Replay matches original closely |
| 70-89% | PARTIAL | Some divergence, investigate differences |
| < 70% | FAIL | Significant drift, review action semantics |
## Replay Script (sketch)
```python
from nexus.bannerlord_trace import BannerlordTraceLogger
from nexus.bannerlord_harness import BannerlordHarness
# Load trace
cycles = BannerlordTraceLogger.load_trace(
Path.home() / ".timmy" / "traces" / "bannerlord" / "trace_bl_xxx.jsonl"
)
# Replay
harness = BannerlordHarness(enable_mock=True, enable_trace=False)
await harness.start()
for cycle in cycles:
for action in cycle["actions_planned"]:
result = await harness.execute_action(action)
# Compare result against cycle["actions_executed"]
await harness.stop()
```
## Hermes Session Mapping
The `hermes_session_id` and `hermes_log_id` fields link traces to Hermes session logs.
When a trace is captured during a live Hermes session, populate these fields so
the trace can be correlated with the broader agent conversation context.

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@@ -0,0 +1,18 @@
{
"trace_id": "bl_20260410_201500_a1b2c3",
"harness_session_id": "f47ac10b",
"hermes_session_id": "f47ac10b",
"hermes_log_id": "",
"game": "Mount & Blade II: Bannerlord",
"app_id": 261550,
"started_at": "2026-04-10T20:15:00+00:00",
"finished_at": "2026-04-10T20:17:30+00:00",
"total_cycles": 3,
"total_actions": 6,
"total_succeeded": 6,
"total_failed": 0,
"trace_file": "~/.timmy/traces/bannerlord/trace_bl_20260410_201500_a1b2c3.jsonl",
"trace_dir": "~/.timmy/traces/bannerlord",
"replay_command": "python -m nexus.bannerlord_harness --mock --replay ~/.timmy/traces/bannerlord/trace_bl_20260410_201500_a1b2c3.jsonl",
"eval_note": "To replay: load trace, re-execute each cycle's actions_planned against a fresh harness in mock mode, compare actions_executed outcomes. Success metric: >=90% action parity between original and replay runs."
}

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@@ -0,0 +1,3 @@
{"cycle_index": 0, "timestamp_start": "2026-04-10T20:15:00+00:00", "timestamp_end": "2026-04-10T20:15:45+00:00", "duration_ms": 45000, "screenshot_path": "/tmp/bannerlord_capture_1744320900.png", "window_found": true, "screen_size": [1920, 1080], "mouse_position": [960, 540], "playtime_hours": 142.5, "players_online": 8421, "is_running": true, "actions_planned": [{"type": "move_to", "x": 960, "y": 540}, {"type": "press_key", "key": "space"}], "decision_note": "Initial state capture. Move to screen center and press space to advance.", "actions_executed": [{"success": true, "action": "move_to", "params": {"type": "move_to", "x": 960, "y": 540}, "timestamp": "2026-04-10T20:15:30+00:00", "error": null}, {"success": true, "action": "press_key", "params": {"type": "press_key", "key": "space"}, "timestamp": "2026-04-10T20:15:45+00:00", "error": null}], "actions_succeeded": 2, "actions_failed": 0, "hermes_session_id": "f47ac10b", "hermes_log_id": "", "harness_session_id": "f47ac10b"}
{"cycle_index": 1, "timestamp_start": "2026-04-10T20:15:45+00:00", "timestamp_end": "2026-04-10T20:16:30+00:00", "duration_ms": 45000, "screenshot_path": "/tmp/bannerlord_capture_1744320945.png", "window_found": true, "screen_size": [1920, 1080], "mouse_position": [960, 540], "playtime_hours": 142.5, "players_online": 8421, "is_running": true, "actions_planned": [{"type": "press_key", "key": "p"}], "decision_note": "Open party screen to inspect troops.", "actions_executed": [{"success": true, "action": "press_key", "params": {"type": "press_key", "key": "p"}, "timestamp": "2026-04-10T20:16:00+00:00", "error": null}], "actions_succeeded": 1, "actions_failed": 0, "hermes_session_id": "f47ac10b", "hermes_log_id": "", "harness_session_id": "f47ac10b"}
{"cycle_index": 2, "timestamp_start": "2026-04-10T20:16:30+00:00", "timestamp_end": "2026-04-10T20:17:30+00:00", "duration_ms": 60000, "screenshot_path": "/tmp/bannerlord_capture_1744321020.png", "window_found": true, "screen_size": [1920, 1080], "mouse_position": [960, 540], "playtime_hours": 142.5, "players_online": 8421, "is_running": true, "actions_planned": [{"type": "press_key", "key": "escape"}, {"type": "move_to", "x": 500, "y": 300}, {"type": "click", "x": 500, "y": 300}], "decision_note": "Close party screen, click on campaign map settlement.", "actions_executed": [{"success": true, "action": "press_key", "params": {"type": "press_key", "key": "escape"}, "timestamp": "2026-04-10T20:16:45+00:00", "error": null}, {"success": true, "action": "move_to", "params": {"type": "move_to", "x": 500, "y": 300}, "timestamp": "2026-04-10T20:17:00+00:00", "error": null}, {"success": true, "action": "click", "params": {"type": "click", "x": 500, "y": 300}, "timestamp": "2026-04-10T20:17:30+00:00", "error": null}], "actions_succeeded": 3, "actions_failed": 0, "hermes_session_id": "f47ac10b", "hermes_log_id": "", "harness_session_id": "f47ac10b"}