feat: Goe rewrite

game_of_everything/.gitignore

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 __pycache__/
 lib/
 .DS_Store
+artifacts/

game_of_everything/DIAGNOSTICS_IMPROVEMENTS.md

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+# Diagnostics System Improvements
+
+**Date:** 2026-07-12  
+**Context:** Addressing excessive token usage and low success rates in chain tests
+
+---
+
+## Problem Statement
+
+Recent run analysis (`output/20260711T214319_...`) revealed:
+- Only **1/4 entities passed** (25% success rate)
+- Estimated **150k+ tokens wasted** on stuck retry loops
+- `bash_history_credential_discovery` entity failed with implementation_bug but **retries couldn't fix it**
+- Root cause: developer created world-readable file but forgot to `chmod 755 /home/stacy` (directory needs +x for traversal)
+- Diagnostician repeatedly categorized as `implementation_bug` → developer regenerated code → same issue → wasted ~40k tokens per retry
+
+---
+
+## Changes Implemented
+
+### 1. Entity Diagnostician: Enhanced Prompt Guidance
+
+**File:** `goe/retry/diagnostician.py`
+
+Added "Common Failure Patterns" section to teach the diagnostician about:
+
+#### File Permission Issues
+- **Problem**: File can be world-readable (0644) but inaccessible if parent directory lacks execute permission
+- **Example**: `/home/stacy/.bash_history` is 0644, but `/home/stacy` is 0750 → www-data cannot traverse
+- **Fix**: Developer must `chmod 755 /home/<user>` to allow directory traversal
+- **Category**: `implementation_bug` (vulnerability setup is incomplete)
+
+#### Process Debugging
+- Process not in `ps aux` or port not in `ss -tlnp` → `design_flaw` (startup failed)
+- Process running but misbehaving → `implementation_bug`
+
+#### Permission Denied vs File Not Found
+- "Permission denied" → check directory permissions (implementation_bug)
+- "No such file or directory" → wrong path or file not created (procedure_bug or implementation_bug)
+
+**Impact:**
+- Diagnostician now understands filesystem permission mechanics
+- Correctly identifies when developer needs to fix directory traversal
+- No band-aid probes needed — guidance alone teaches correct diagnosis
+
+---
+
+### 2. Entity Retry: Stuck Loop Detection & Escalation
+
+**File:** `goe/build.py`
+
+**Problem:** Entity diagnostician could waste retries on same category:
+```
+Attempt 1: implementation_bug → developer regenerates
+Attempt 2: implementation_bug (same issue) → developer regenerates
+Attempt 3: implementation_bug (same issue) → developer regenerates
+Result: 3 × ~40k tokens wasted, entity still fails
+```
+
+**Solution:** Track `diagnosis_history` and escalate when stuck:
+
+```python
+diagnosis_history = []
+while not result.passed:
+    diagnosis = diagnose(entity, artifact, result, env)
+
+    # Detect stuck loop: same category 2x in a row
+    if (len(diagnosis_history) >= 1 
+        and diagnosis_history[-1] == diagnosis.category
+        and diagnosis.category != DiagnosisCategory.design_flaw):
+        # Escalate to design_flaw (full crew regeneration)
+        diagnosis = Diagnosis(
+            category=DiagnosisCategory.design_flaw,
+            description=f"Escalated from {diagnosis_history[-1].value} after 2 consecutive failures...",
+        )
+
+    diagnosis_history.append(diagnosis.category)
+```
+
+**Impact:**
+- Prevents wasted tokens on repeated developer/attacker regenerations
+- Forces full crew (engineer + developer + attacker) regen after 2 consecutive same-category failures
+- Example: `implementation_bug → implementation_bug` becomes `implementation_bug → design_flaw (escalated)`
+
+**Test Coverage:** 4 new tests in `tests/test_retry_escalation.py`
+
+---
+
+### 3. Chain Test: Enhanced Evidence Collection
+
+**File:** `goe/flow/chain_test.py`
+
+**Before:**
+```python
+def _summarise_failure(result):
+    for step in result.steps:
+        if not step.passed:
+            lines.append(f"Step '{step.step_id}' failed: {step.reason}")
+            lines.append(f"  stdout: {stdout[:400]}")  # truncated
+            lines.append(f"  stderr: {stderr[:200]}")  # truncated
+            break  # only first failure
+    return "\n".join(lines)
+```
+
+**Problems:**
+- Only first failure shown (subsequent failures might reveal root cause)
+- Truncated output (400/200 chars may cut critical error messages)
+- No context about what worked before failure
+- No container probing (can't see if services are running)
+
+**After:**
+```python
+def _summarise_failure(result, env, procedure):
+    # Show last 3 successful steps for context
+    successes = [s for s in result.steps if s.passed][-3:]
+    for s in successes:
+        lines.append(f"✓ {s.step_id}")
+
+    # Show ALL failures, not just first
+    failures = [s for s in result.steps if not s.passed]
+    for s in failures:
+        lines.append(f"✗ {s.step_id}: {s.reason}")
+        lines.append(f"  stdout: {stdout[:800]}")  # increased
+        lines.append(f"  stderr: {stderr[:400]}")  # increased
+
+    # Probe containers for evidence
+    if env:
+        # Attacker container
+        _, ps_out, _ = env.exec_in("attacker", "ps aux | head -15")
+        lines.append(f"[Attacker] Processes: {ps_out[:300]}")
+
+        # Target system (if identifiable from failed step)
+        target_system = _extract_target_system(failure, procedure)
+        if target_system:
+            _, sys_ps, _ = env.exec_in(target_system, "ps aux | head -15")
+            lines.append(f"[{target_system}] Processes: {sys_ps[:300]}")
+```
+
+**New Helper: `_extract_target_system()`**
+- Parses failed step's action (command/URL)
+- Extracts `${system.<id>.host}` to identify which container to probe
+- Returns system_id for targeted evidence collection
+
+**Impact:**
+- More context: see what worked before failure
+- Complete picture: all failures shown, not just first
+- Live evidence: probe containers to see if services are running
+- Larger excerpts: 2x more stdout/stderr (800/400 vs 400/200)
+
+**Test Coverage:** 9 new tests in `tests/test_chain_diagnosis.py`
+
+---
+
+### 4. Chain fix_chain: Better Diagnostic Guidance
+
+**File:** `goe/construction_crew/chain_attacker.py`
+
+Added "Common Failure Patterns and Fixes" section to fix_chain prompt:
+
+#### Interpolation Issues
+- Wrong `${system.<id>.host}` → check graph for correct ID
+- Missing `${edge.<id>.<param>}` → use `.value` fallback
+
+#### Service/Process Not Running
+- If container evidence shows process missing or port not listening → **entity is broken**
+- Cannot be fixed by patching procedure → entity needs L2 retest
+
+#### Permission Denied on Files
+- Home directory permission issues indicate **entity implementation bug**
+- Cannot be fixed by procedure patch
+
+#### Connection Refused / Timeout
+- Check container evidence: is service listening?
+- Check hostname interpolation
+- If service not running → **entity is broken**
+
+#### When NOT to Patch
+> If diagnosis shows entity-level issues (process not running, service not listening, deploy failure), you CANNOT fix this by patching the procedure. The entity itself is broken.
+
+**Impact:**
+- fix_chain now understands when problems are unfixable at procedure level
+- Preserves procedure when entity is broken (avoids wasted speculation)
+- Focuses fixes on actual procedure bugs (interpolation, sequencing, assertions)
+
+---
+
+## Summary of Improvements
+
+| Improvement | Problem Solved | Impact | Tests |
+|-------------|---------------|--------|-------|
+| **Entity diagnostician prompt** | Didn't understand file permission mechanics | Correct categorization of permission issues | Implicit (LLM behavior) |
+| **Entity stuck loop detection** | Wasted tokens on repeated same-category failures | Auto-escalates after 2 consecutive same-category diagnoses | 4 tests |
+| **Chain evidence collection** | Insufficient context for diagnosis | Shows context, all failures, container probes | 9 tests |
+| **Chain fix_chain prompt** | Tried to fix entity-level issues | Recognizes when entity is broken vs procedure bug | Implicit (LLM behavior) |
+
+**Total new tests:** 13 (4 entity escalation + 9 chain diagnosis)  
+**All tests passing:** 32/32 ✅
+
+---
+
+## Example: bash_history Scenario (Before vs After)
+
+### Before Changes
+
+**Attempt 1:**
+```
+L2 test fails: Permission denied on /home/stacy/.bash_history
+Diagnostician: implementation_bug (file permissions wrong)
+Developer: Regenerates setup.sh, sets file to 0644
+Result: Still fails (forgot directory permissions)
+```
+
+**Attempt 2:**
+```
+L2 test fails: Permission denied (same)
+Diagnostician: implementation_bug (still categorized as file issue)
+Developer: Regenerates again, still sets only file to 0644
+Result: Still fails
+Tokens wasted: ~40k
+```
+
+**Attempt 3:**
+```
+L2 test fails: Permission denied (same)
+Diagnostician: implementation_bug
+Developer: Gives up after max retries
+Result: Entity FAILED
+Total tokens wasted: ~120k on retries that couldn't fix the root cause
+```
+
+### After Changes
+
+**Attempt 1:**
+```
+L2 test fails: Permission denied on /home/stacy/.bash_history
+Diagnostician: implementation_bug
+  "File is world-readable (0644) but parent directory /home/stacy 
+   likely has restrictive permissions (0750). www-data needs execute 
+   permission on ALL parent directories. Developer must chmod 755 /home/stacy."
+Developer: Regenerates with chmod 755 /home/stacy
+Result: PASSES
+Tokens saved: ~80k (avoided 2 more retry attempts)
+```
+
+**OR if developer still doesn't fix it:**
+
+**Attempt 2:**
+```
+L2 test fails: Permission denied (same)
+Diagnostician: implementation_bug
+Stuck loop detected: implementation_bug → implementation_bug
+Auto-escalated to: design_flaw
+Engineer + Developer + Attacker: Full crew regeneration
+Result: PASSES (engineer redesigns approach)
+Tokens saved: ~40k (avoided 1 more developer-only retry)
+```
+
+---
+
+## Expected Outcomes
+
+1. **Higher success rates**: Diagnostician understands permission mechanics → correct fixes
+2. **Lower token usage**: Stuck loop detection prevents wasted retries
+3. **Better visibility**: Chain tests show what worked, what failed, and why
+4. **Smarter fixes**: fix_chain recognizes when entity is broken vs procedure bug
+
+---
+
+## Future Work (Not Implemented)
+
+**Medium Priority:**
+- Stuck loop detection for chain tests (same pattern as entity tests)
+- Entity-bug detection in chain tests → route back to L2
+
+**Low Priority:**
+- Structured categorization for chain failures (procedure_bug vs entity_bug vs chain_design_flaw)
+- Adaptive probes for chain tests based on failure type