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# Python operational caches
__pycache__/
*.py[cod]
*$py.class
# Environment Isolation (uv / virtualenv)
.venv/
venv/
ENV/
# System specific junk
.DS_Store
.idea/
.vscode/
*.log

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========================================================================
PROJECT: MCP-Drift-State-Tracker
COPYRIGHT: Copyright (C) 2026 dcos.net
HOMEPAGE: https://git.dcos.net/dcosnet/mcp-drift-state-tracker/
REPOSITORY: https://git.dcos.net/dcosnet/mcp-drift-state-tracker/
LICENSE: GNU Affero General Public License v3.0 (AGPL-3.0)
========================================================================
GNU AFFERO GENERAL PUBLIC LICENSE
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How to Apply These Terms to Your New Programs
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Also add information on how to contact you by electronic and paper mail.
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You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.
------------------------------------------------------------------------
APPENDIX: HOW TO APPLY THESE TERMS TO YOUR NEW PROGRAMS
To ensure your repository complies with the remote network interaction
requirements (Section 13 of the AGPLv3), you must ensure users
interacting with your stack can access the source code.
This project, MCP-Drift-State-Tracker, complies by maintaining its primary development
repository at https://git.dcos.net. Any derivative works must retain
this notice and provide equivalent access to source code.

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Live Verification Using the MCP Inspector
Before embedding into production pipelines, execute the native transport wrapper to test primitives:
Bash
uv run npx @modelcontextprotocol/inspector uv run mcp_drift_state_tracker.py
3. Odysseus Integration Configuration
Map this absolute workspace path directly into your active runtime tool configurations:
JSON
{
"mcpServers": {
"mcp-drift-state-tracker": {
"command": "uv",
"args": [
"--directory",
"/absolute/path/to/mcp-drift-state-tracker",
"run",
"mcp_drift_state_tracker.py"
]
}
}
}

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# MCP-Drift-State-Tracker
An industrial-grade Model Context Protocol (MCP) server engineered to enforce code completeness, intercept context erosion, and neutralize LLM laziness across multi-language repository workspaces.
Optimized for local, high-throughput developer stacks (such as Odysseus, Aider, and Hermes driving local Ollama instances), this tracker acts as a deterministic pre-commit and post-mutation gatekeeper. It eliminates the "laziness trap" (where local models substitute production code with `pass`, `todo!()`, or comments) and the "truncation trap" (where attention compression causes functions to collapse mid-generation).
---
## ? Core Architecture
Unlike fragile pattern-matching text scanners, `MCP-Drift-State-Tracker` evaluates code modifications using language-aware structural definitions:
1. **Python AST Driver:** Uses native compilation parsing (`ast`) to capture an explicit footprint of every class, function signature, decorator chain, and package dependency.
2. **Deterministic Brace Scoping Engine:** Tracks character-by-character lexical nesting depths to monitor structural boundaries across curly-brace ecosystems, including **Rust, Go, TypeScript, JavaScript, C, C++, Java, and C#**.
3. **State Persistence Layer:** Automatically stores baseline repository structures securely inside a hidden workspace index (`.mcp_drift_state.json`), ensuring tracking metrics survive agent crashes or tool stack restarts.
---
## ? Interception Capabilities
* **The Laziness Trap:** Instantly flags and rejects mutations that introduce placeholder stubs or shortcuts (`pass`, `NotImplementedError`, `todo!()`, `panic!()`, `// Insert code here`).
* **The Compression Trap:** Monitors line-span volatility. If an LLM drops code to save token context window allocations, any function or scope contraction exceeding 50% triggers an immediate blocker.
* **The Dependency Vault:** Catches subtle regressions where a model strips package imports, type hints, or critical API annotations (such as `@mcp.tool()` or `#[inline]`) during extensive refactors.
---
## ? Installation & Integration
### Prerequisites
Manage execution isolation cleanly via `uv` to preserve a pure bare-metal host environment:
```bash
# Verify uv availability
uv --version

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{
"mcpServers": {
"mcp-drift-state-tracker": {
"command": "uv",
"args": [
"run",
"--with",
"fastmcp",
"/absolute/path/to/mcp_drift_state_tracker.py"
]
}
}
}

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# ==============================================================================
# mcp_drift_state_tracker.py
# Copyright (C) 2026 Jeremy Anderson info@dcos.net
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# ==============================================================================
import ast
import os
import json
import re
from abc import ABC, abstractmethod
from typing import Dict, Any, List, Set, Optional
from mcp.server.fastmcp import FastMCP
mcp = FastMCP("MCP-Drift-State-Tracker")
# Global persistence config
STATE_FILE_NAME = ".mcp_drift_state.json"
# Global exclusion profiles for high-performance directory sweeps
GLOBAL_IGNORE_DIRS = {
".git", ".venv", "venv", "__pycache__", "node_modules", "target",
"dist", "build", "out", ".cargo", ".rustup", "obj", "bin"
}
# ------------------------------------------------------------------------------
# PARSER INTERFACE & DRIVER IMPLEMENTATIONS
# ------------------------------------------------------------------------------
class BaseLanguageParser(ABC):
"""Abstract Base Class defining the protocol for structural language parsers."""
@abstractmethod
def parse(self, file_path: str, source: str) -> Dict[str, Any]:
"""Parses source content into a unified structural inventory dictionary."""
pass
class PythonASTParser(BaseLanguageParser):
"""Deep structural inspection engine for Python using native AST."""
def _is_mock(self, body: List[ast.stmt]) -> bool:
if not body:
return True
statements = body
if len(body) > 1 and isinstance(body[0], ast.Expr):
if isinstance(body[0].value, ast.Constant) and isinstance(body[0].value.value, str):
statements = body[1:]
if len(statements) == 1:
node = statements[0]
if isinstance(node, (ast.Pass, ast.Break, ast.Continue)):
return True
if isinstance(node, ast.Raise) and isinstance(node.exc, ast.Name) and node.exc.id == "NotImplementedError":
return True
if isinstance(node, ast.Expr) and isinstance(node.value, ast.Constant) and isinstance(node.value.value, str):
return True
return False
def parse(self, file_path: str, source: str) -> Dict[str, Any]:
tree = ast.parse(source, filename=file_path)
functions: Dict[str, Dict[str, Any]] = {}
classes: Set[str] = set()
imports: Set[str] = set()
for node in ast.walk(tree):
if isinstance(node, ast.ClassDef):
classes.add(node.name)
elif isinstance(node, ast.Import):
for alias in node.names:
imports.add(f"import {alias.name}")
elif isinstance(node, ast.ImportFrom):
module = node.module if node.module else ""
for alias in node.names:
imports.add(f"from {module} import {alias.name}")
elif isinstance(node, ast.FunctionDef):
args = {arg.arg: ast.unparse(arg.annotation).strip() if arg.annotation else "None" for arg in node.args.args}
ret = ast.unparse(node.returns).strip() if node.returns else "None"
decs = {ast.unparse(dec).strip().split('(')[0] for dec in node.decorator_list}
span = (node.end_lineno - node.lineno + 1) if hasattr(node, "end_lineno") else 1
functions[node.name] = {
"args": args,
"returns": ret,
"decorators": list(decs),
"lines": span,
"is_mock": self._is_mock(node.body)
}
return {
"classes": list(classes),
"functions": functions,
"imports": list(imports),
"total_lines": len(source.splitlines())
}
class BraceLanguageParser(BaseLanguageParser):
"""
Deterministic Lexical Scoping Engine for curly-brace languages.
Supports: C, C++, Rust, Go, Java, TypeScript, JavaScript, C#
"""
def __init__(self, extension: str):
self.ext = extension
def parse(self, file_path: str, source: str) -> Dict[str, Any]:
lines = source.splitlines()
functions: Dict[str, Dict[str, Any]] = {}
classes: Set[str] = set()
imports: Set[str] = set()
# Compile lightweight lexical rules tailored to language families
if self.ext in {".rs"}:
import_pattern = re.compile(r'^\s*(?:pub\s+)?use\s+([^;]+);')
func_pattern = re.compile(r'(?:pub\s+)?(?:async\s+)?fn\s+([a-zA-Z_0-9]+)\s*(<[^>]+>)?\s*\(([^)]*)\)')
class_pattern = re.compile(r'^\s*(?:pub\s+)?(?:struct|enum|trait)\s+([a-zA-Z_0-9]+)')
decorator_pattern = re.compile(r'^\s*#\[([^\]]+)\]')
elif self.ext in {".go"}:
import_pattern = re.compile(r'^\s*import\s+(?:\([^\)]+\)|"[^"]+")')
func_pattern = re.compile(r'^func\s+(?:\([^)]+\)\s+)?([a-zA-Z_0-9]+)\s*\(([^)]*)\)')
class_pattern = re.compile(r'^\s*type\s+([a-zA-Z_0-9]+)\s+struct')
decorator_pattern = re.compile(r'^\s*//\s*@([a-zA-Z_0-9]+)')
else: # C-style family: JS, TS, C, C++, Java, C#
import_pattern = re.compile(r'^\s*(?:import|require|#include)\s+.*')
func_pattern = re.compile(r'(?:public|private|protected|static|async|function)?\s*([a-zA-Z_0-9]+)\s*\(([^)]*)\)\s*(?::\s*[a-zA-Z_0-9<>\s|]+)?\s*\{?')
class_pattern = re.compile(r'^\s*(?:export\s+)?(?:class|interface|struct)\s+([a-zA-Z_0-9]+)')
decorator_pattern = re.compile(r'^\s*@([a-zA-Z_0-9]+)')
brace_depth = 0
active_func: Optional[str] = None
func_start_line = 0
func_body_tokens: List[str] = []
pending_decorators: List[str] = []
for idx, line in enumerate(lines, start=1):
stripped = line.strip()
if not stripped:
continue
# Check Global Imports
if brace_depth == 0 and import_pattern.match(line):
imports.add(stripped)
continue
# Harvest Block Decorators / System Annotations
dec_match = decorator_pattern.match(line)
if brace_depth == 0 and dec_match:
pending_decorators.append(dec_match.group(1))
continue
# Identify Structural Class/Struct boundaries
class_match = class_pattern.match(line)
if brace_depth == 0 and class_match:
classes.add(class_match.group(1))
# Identify Function Signature Transitions
if brace_depth == 0:
func_match = func_pattern.search(line)
if func_match and not any(k in stripped for k in {"if", "for", "while", "switch", "catch"}):
name = func_match.group(1)
if name not in {"class", "struct", "function", "return"}:
active_func = name
func_start_line = idx
func_body_tokens = []
# Stream character token array data to track precise scope boundaries
for char in stripped:
if char == '{':
brace_depth += 1
elif char == '}':
brace_depth -= 1
if brace_depth == 0 and active_func:
# Compute functional line boundaries safely
span = idx - func_start_line + 1
body_str = "\n".join(func_body_tokens).lower()
# Process multi-language laziness markers
is_mock = (
len(func_body_tokens) <= 3 or
any(stub in body_str for stub in ["todo", "panic", "notimplemented", "throw new", "return null"])
)
functions[active_func] = {
"args": {}, # Signature layout preservation mapped textually
"returns": "Inferred",
"decorators": pending_decorators.copy(),
"lines": span,
"is_mock": is_mock
}
active_func = None
pending_decorators.clear()
if brace_depth > 0 and active_func:
func_body_tokens.append(stripped)
return {
"classes": list(classes),
"functions": functions,
"imports": list(imports),
"total_lines": len(lines)
}
# ------------------------------------------------------------------------------
# CORE WORKSPACE ENGINE REGISTRY & STATE PERSISTENCE
# ------------------------------------------------------------------------------
class WorkspaceRegistry:
"""Manages the in-memory analysis cache with underlying thread-safe JSON backup layers."""
@staticmethod
def get_parser(file_path: str) -> Optional[BaseLanguageParser]:
_, ext = os.path.splitext(file_path)
if ext == ".py":
return PythonASTParser()
elif ext in {".js", ".jsx", ".ts", ".tsx", ".rs", ".go", ".c", ".cpp", ".h", ".hpp", ".java", ".cs"}:
return BraceLanguageParser(ext)
return None
@classmethod
def load_state(cls, root_path: str) -> Dict[str, Any]:
target = os.path.join(root_path, STATE_FILE_NAME) if os.path.isdir(root_path) else os.path.join(os.path.dirname(root_path), STATE_FILE_NAME)
if os.path.exists(target):
try:
with open(target, "r", encoding="utf-8") as f:
return json.load(f)
except:
pass
return {}
@classmethod
def save_state(cls, root_path: str, state: Dict[str, Any]) -> None:
target = os.path.join(root_path, STATE_FILE_NAME) if os.path.isdir(root_path) else os.path.join(os.path.dirname(root_path), STATE_FILE_NAME)
try:
with open(target, "w", encoding="utf-8") as f:
json.dump(state, f, indent=2)
except:
pass
def _resolve_workspace_files(target_path: str) -> List[str]:
abs_path = os.path.abspath(target_path)
if os.path.isfile(abs_path):
return [abs_path] if WorkspaceRegistry.get_parser(abs_path) else []
resolved = []
for root, dirs, files in os.walk(abs_path):
# Destructively filter directory scans to bypass noise
dirs[:] = [d for d in dirs if d not in GLOBAL_IGNORE_DIRS]
for file in files:
full_path = os.path.join(root, file)
if WorkspaceRegistry.get_parser(full_path):
resolved.append(full_path)
return resolved
# ------------------------------------------------------------------------------
# EXPOSED MCP PRODUCTION GATE TOOLS
# ------------------------------------------------------------------------------
@mcp.tool()
async def snapshot_baseline(target_path: str) -> str:
"""Snapshots structural footprints for all matching code assets across the repository tree."""
base_dir = os.path.abspath(target_path) if os.path.isdir(target_path) else os.path.dirname(os.path.abspath(target_path))
files = _resolve_workspace_files(target_path)
if not files:
return f"? BASELINE_FAILURE: No supported source languages discovered at target path: {target_path}"
current_registry = WorkspaceRegistry.load_state(base_dir)
cataloged = 0
for file_path in files:
parser = WorkspaceRegistry.get_parser(file_path)
if not parser:
continue
try:
with open(file_path, "r", encoding="utf-8", errors="ignore") as f:
content = f.read()
current_registry[file_path] = parser.parse(file_path, content)
cataloged += 1
except Exception as e:
return f"? BASELINE_FAILURE: Internal parsing failure on '{os.path.basename(file_path)}': {str(e)}"
WorkspaceRegistry.save_state(base_dir, current_registry)
return f"? BASELINE_LOCKED: Workspace matrix secured across {cataloged} source modules."
@mcp.tool()
async def audit_revision(target_path: str) -> str:
"""Audits modified paths, enforcing type, import, and logic limits across all languages."""
base_dir = os.path.abspath(target_path) if os.path.isdir(target_path) else os.path.dirname(os.path.abspath(target_path))
registry = WorkspaceRegistry.load_state(base_dir)
if not registry:
return f"? AUDIT_FAILED: Persistent baseline marker layer is empty or missing. Trigger snapshots first."
files = _resolve_workspace_files(target_path)
drift_errors = []
# Detect unexpected missing modules from tracked baselines
for tracked_file in list(registry.keys()):
if tracked_file.startswith(base_dir) and not os.path.exists(tracked_file):
drift_errors.append(f"Module Dropped: Tracked source '{os.path.basename(tracked_file)}' was deleted.")
for file_path in files:
if file_path not in registry:
continue
baseline = registry[file_path]
filename = os.path.basename(file_path)
parser = WorkspaceRegistry.get_parser(file_path)
if not parser:
continue
try:
with open(file_path, "r", encoding="utf-8", errors="ignore") as f:
content = f.read()
current = parser.parse(file_path, content)
except Exception as e:
drift_errors.append(f"Syntax Error [{filename}]: File compilation or parse block failure: {str(e)}")
continue
# 1. Audit Global Package/Dependency Drops
missing_imports = set(baseline["imports"]) - set(current["imports"])
if missing_imports:
drift_errors.append(f"[{filename}] Dropped Dependencies: {list(missing_imports)}")
# 2. Audit OOP Object Integrity Drops
missing_classes = set(baseline["classes"]) - set(current["classes"])
if missing_classes:
drift_errors.append(f"[{filename}] Core Structs/Classes Missing: {list(missing_classes)}")
# 3. Audit Function Signatures, Logic Truncation, and Laziness Traps
for func_name, b_meta in baseline["functions"].items():
if func_name not in current["functions"]:
drift_errors.append(f"[{filename}] Missing Logic Block: Function '{func_name}' was skipped.")
continue
c_meta = current["functions"][func_name]
# Enforce systemic decorator and annotation checks
missing_decs = set(b_meta["decorators"]) - set(c_meta["decorators"])
if missing_decs:
drift_errors.append(f"[{filename}] Stripped Annotations on '{func_name}': Dropped {list(missing_decs)}")
# Enforce multi-language laziness checks
if c_meta["is_mock"] and not b_meta["is_mock"]:
drift_errors.append(f"[{filename}] Laziness Trap Triggered in '{func_name}': Substituted with placeholder/throw/todo stub.")
# Enforce physical compression check bounds
if b_meta["lines"] > 4 and c_meta["lines"] <= (b_meta["lines"] * 0.5):
drift_errors.append(f"[{filename}] Truncation Trap Triggered in '{func_name}': Scope collapsed by >50% ({b_meta['lines']} -> {c_meta['lines']} lines).")
if drift_errors:
return (
f"? CRITICAL_COMPLETENESS_DRIFT: Regression detected during mutation check!\n"
+ "\n".join(f" - {err}" for err in drift_errors)
+ "\nAction: Halt code ingestion. Force full context reconstruction."
)
return f"? REVISION_PASSED: Workspace architectures, dependencies, and functional bounds are verified."
@mcp.tool()
async def run_completeness_diagnostic() -> str:
"""Verifies parsing and capture capabilities across mixed multi-language test fixtures."""
fixture_py = "drift_test.py"
fixture_rs = "drift_test.rs"
py_v1 = "@mcp.tool()\ndef calculate_hash(seed: str) -> None:\n print(seed)\n"
rs_v1 = "#[inline]\npub fn calculate_hash(seed: &str) {\n println!(\"{}\", seed);\n}"
try:
with open(fixture_py, "w") as f: f.write(py_v1)
with open(fixture_rs, "w") as f: f.write(rs_v1)
await snapshot_baseline(".")
# Ingest lazy mutations across language families
with open(fixture_py, "w") as f: f.write("def calculate_hash(seed):\n pass\n")
with open(fixture_rs, "w") as f: f.write("pub fn calculate_hash(seed: &str) {\n todo!();\n}")
audit_result = await audit_revision(".")
if "Stripped Annotations" in audit_result and "Laziness Trap Triggered" in audit_result:
return "? DIAGNOSTIC_PASSED: Multi-language driver framework successfully trapped Python AST and Rust lexical code-erosion boundaries."
return f"? DIAGNOSTIC_FAILED: Structural deviations bypassed checkpoints. Result:\n{audit_result}"
finally:
for path in [fixture_py, fixture_rs, STATE_FILE_NAME]:
if os.path.exists(path):
os.remove(path)
if __name__ == "__main__":
mcp.run(transport="stdio")

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[project]
name = "mcp-drift-state-tracker"
version = "0.1.0"
description = "An industrial-grade Model Context Protocol (MCP) server engineered to enforce code completeness, intercept context erosion, and neutralize LLM laziness across multi-language repository workspaces.."
readme = "README.md"
requires-python = ">=3.10"
dependencies = [
"fastmcp>=0.4.1",
]
[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"