Implement consistency architecture (10-principle framework)

Adds:
- ARCHITECTURE.md: Full documentation of 3-layer system
- Context Pipeline: Preprocessing layer (pipeline.js)
- Workflow Router: 4 fixed workflows (coding, debug, deploy, audit)
- Validation Layer: Post-response quality gate (validator.js)
- Format Templates: Structured output templates
- TOOLS.md: Beavault connection documentation

Architecture:
- Layer 1: Behavior rules (always injected)
- Layer 2: Persistent facts (structured memory)
- Layer 3: Ephemeral context
- Priority enforcement: Rules > Prefs > Task > Chat
- Memory write policy: Only confirmed fixes, repeated preferences

workflows/coding.md

@@ -0,0 +1,45 @@
+# Workflow: Coding
+
+## Intent Classification
+
+**Triggers:** Code changes, development tasks, bug fixes, feature implementation
+
+## Fixed Output Format
+
+```markdown
+## Summary
+[What changed - 1-2 sentences]
+
+## Files Modified
+| File | Change |
+|------|--------|
+| file1.py | [description] |
+| file2.js | [description] |
+
+## Verification
+- [ ] Tests pass: `command`
+- [ ] Lint passes: `command`
+- [ ] Manual verification: [how]
+
+## Decisions Made
+- [Decision 1]
+- [Decision 2]
+
+## Still Open
+- [ ] [if any]
+```
+
+## Tool Access Rules
+
+1. **Delegate to coding agents** when possible
+2. **Read before writing** - always check existing code first
+3. **Verify before reporting** - tests, lint, manual check
+4. **Update memory** - log decisions to DECISIONS.md
+
+## Constraints
+
+- NO: Direct production edits without verification
+- NO: Untested code reported as "done"
+- NO: Breaking changes without migration plan
+- YES: Clear acceptance criteria before starting
+- YES: Root cause analysis before fixes