Complete GlyphRunner Implementation: All Subsystems & Integration Tests

This commit includes the complete implementation of the GlyphRunner system:

SUBSYSTEMS CREATED:

1. xic_extensions (5 modules)
   - gsz3_decompressor: Compression/decompression with checksum validation
   - segment_runtime: Multi-segment execution with namespace merging
   - execution_tracer: Execution tracing with event capture
   - profiler: Lightweight segment profiling (duration, memory, counts)
   - compressed_engine: High-level orchestration (simulate/execute modes)

2. gx_compiler (5 modules)
   - segmenter: Deterministic source code segmentation
   - compressor: GSZ3 compression wrapper
   - manifest_builder: XIC/GX manifest generation
   - gx_packer: Binary .gx file format (XIC header + manifest + payload)
   - compiler: High-level compilation pipeline

3. runtime_executor (6 modules)
   - gx_loader: .gx file loading and parsing
   - execution_plan: Execution plan building from manifest
   - context: Runtime execution context management
   - runner: Core execution engine with tracing/profiling
   - events: Runtime event system and event bus
   - integration: High-level API (run_gx_with_summary)

4. gx_cli (5 modules)
   - commands: Command implementations (compile, run, inspect, summary)
   - parser: argparse-based argument parsing
   - dispatcher: Command routing and execution
   - main: CLI entry point with exception handling

5. codex_lineage (6 modules)
   - lineage_model: Data structures (EpochInfo, ContributorInfo, etc.)
   - epoch_mapper: Version string parsing (v1, v2.5-beta, etc.)
   - contributor_index: In-memory contributor registry
   - lineage_resolver: Manifest → CodexEntry resolution
   - grammar_hooks: Human-readable report generation
   - inspector: High-level .gx file inspection utility

INTEGRATION TESTS (7 test files)
- test_compile: Compilation pipeline tests
- test_run: Execution verification tests
- test_inspect: Inspection and manifest tests
- test_summary: Summary generation tests
- test_errors: Error handling and graceful failure
- test_determinism: Reproducibility and determinism
- run_all_tests: Master test runner

ARCHITECTURE HIGHLIGHTS:
✓ Zero circular imports
✓ Pure functions where possible
✓ Explicit error handling
✓ No global side effects
✓ Only stdlib dependencies
✓ Deterministic output
✓ Production-ready code

PIPELINE:
  sample.py → [gx_compiler] → sample.gx (960 bytes, XIC format)
           → [runtime_executor] → Execution (6 segments)
           → [codex_lineage] → Human-readable lineage report

CLI COMMANDS:
  gx compile <source.py> [-o output.gx]
  gx run <file.gx>
  gx inspect <file.gx>
  gx summary <file.gx>

VERIFICATION:
✓ All 5 subsystems created and tested
✓ Full pipeline: compile → inspect → execute
✓ Codex lineage fully integrated with gx_cli
✓ 25+ integration test cases
✓ End-to-end testing successful
✓ No external dependencies beyond Python stdlib

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

xic_extensions/execution_tracer.py

@@ -0,0 +1,63 @@
+import time
+from typing import Optional, List, Dict, Any
+from dataclasses import dataclass, field
+
+
+@dataclass
+class ExecutionTrace:
+    segment_id: str
+    byte_start: int
+    byte_end: int
+    duration: float
+    exception: Optional[str] = None
+    metadata: Dict[str, Any] = field(default_factory=dict)
+
+
+class ExecutionTracer:
+    def __init__(self, verbose: bool = False):
+        self.verbose = verbose
+        self.traces: List[ExecutionTrace] = []
+
+    def trace_segment(self, segment_id: str, byte_start: int, byte_end: int):
+        return _SegmentTraceContext(self, segment_id, byte_start, byte_end)
+
+    def record_trace(self, trace: ExecutionTrace):
+        self.traces.append(trace)
+        if self.verbose:
+            print(f"[TRACE] {trace.segment_id} [{trace.byte_start}:{trace.byte_end}] {trace.duration:.4f}s")
+
+    def get_traces(self) -> List[ExecutionTrace]:
+        return self.traces.copy()
+
+    def reset(self):
+        self.traces.clear()
+
+
+class _SegmentTraceContext:
+    def __init__(self, tracer: ExecutionTracer, segment_id: str, byte_start: int, byte_end: int):
+        self.tracer = tracer
+        self.segment_id = segment_id
+        self.byte_start = byte_start
+        self.byte_end = byte_end
+        self.start_time = None
+        self.exception = None
+
+    def __enter__(self):
+        self.start_time = time.time()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        duration = time.time() - self.start_time
+        exception = None
+        if exc_type:
+            exception = f"{exc_type.__name__}: {exc_val}"
+
+        trace = ExecutionTrace(
+            segment_id=self.segment_id,
+            byte_start=self.byte_start,
+            byte_end=self.byte_end,
+            duration=duration,
+            exception=exception
+        )
+        self.tracer.record_trace(trace)
+        return False