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feat(terraphim_rlm): Merge remote Phase A fixes with correct race condition implementation
This commit resolves the merge conflict between local and remote branches: Merged from remote (754c848 - Phase A: Critical security fixes): - lib.rs: Added validation module export - mcp_tools.rs: Input validation for MCP tools - validation.rs: Security validation functions (path traversal, size limits) Kept from local (correct implementation): - firecracker.rs: Atomic write lock for race condition fix (read-then-write is buggy) - Complete fcctl-core adapter implementation - Production deployment artifacts The race condition fix in remote was non-atomic (read() then write()), which could allow concurrent snapshots to exceed max_snapshots_per_session. Local implementation uses a single write() lock for atomic check-and-increment. Also includes complete project documentation: - Research and design documents (disciplined development process) - Verification and validation reports (Phases 4 & 5) - Architecture Decision Record (ADR-001) - Deployment summary and handover documentation - CHANGELOG.md updated - Monitoring task for 48-hour production observation Refs: PR #426 Deployment: Production on bigbox (267ms allocation, 46% under target)
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‎.docs/ADAPTER_PLAN_SUMMARY.md‎

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# fcctl-core Adapter Implementation Plan Summary
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## Status: READY FOR IMPLEMENTATION
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Both Phase 1 (Research) and Phase 2 (Design) have passed quality evaluation.
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---
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## Documents Created
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| Document | Type | Quality Score | Status |
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|----------|------|---------------|--------|
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| research-fcctl-adapter.md | Phase 1 Research | 4.3/5.0 | ✅ APPROVED |
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| design-fcctl-adapter.md | Phase 2 Design | 4.6/5.0 | ✅ APPROVED |
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| quality-evaluation-fcctl-research.md | Quality Gate | N/A | ✅ PASSED |
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| quality-evaluation-fcctl-design.md | Quality Gate | N/A | ✅ PASSED |
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---
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## Problem Summary
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Bridge fcctl-core's concrete `VmManager` struct with terraphim_firecracker's `VmManager` trait to enable full VM pool functionality.
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**Type Mismatch:**
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- fcctl-core provides: Concrete `VmManager` struct
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- terraphim_firecracker expects: `Arc<dyn VmManager>` trait object
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**Solution:** Adapter pattern - thin wrapper implementing the trait using fcctl-core's struct
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---
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## Key Design Decisions
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### Architecture
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```
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FirecrackerExecutor -> VmPoolManager -> FcctlVmManagerAdapter -> fcctl-core VmManager -> Firecracker VM
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```
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### Value of Pool Architecture (Preserved)
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- Pre-warmed VMs (20-30x faster burst handling)
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- Sub-500ms allocation guarantee
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- VM reuse without boot overhead
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- Background maintenance
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### Implementation Plan
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**Phase 1: Adapter Structure** (3 steps)
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- Create adapter.rs with struct definition
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- Implement trait scaffolding
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- Configuration translation
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**Phase 2: Method Implementation** (5 steps)
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- Implement create_vm(), start_vm(), stop_vm(), delete_vm()
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- Implement remaining trait methods
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**Phase 3: Integration** (3 steps)
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- Update executor/mod.rs
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- Replace TODO stub in firecracker.rs
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- Verify compilation
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**Phase 4: Testing** (3 steps)
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- Unit tests for adapter
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- Integration test
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- Performance benchmark
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**Phase 5: Verification** (2 steps)
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- Full test suite
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- End-to-end test with Firecracker
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**Total: 16 steps across 5 phases**
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---
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## Critical Invariants
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- ✅ Adapter implements VmManager trait fully
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- ✅ All operations delegate to fcctl-core
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- ✅ Error propagation preserves context
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- ✅ Configuration translation is lossless
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- ✅ Adapter overhead < 1ms per operation
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- ✅ Sub-500ms allocation guarantee maintained
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---
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## Open Questions for You
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1. **VM ID Format**: fcctl-core uses string IDs. Enforce ULID or pass through?
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2. **Configuration Mapping**: VmRequirements may have extra fields. Options:
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- A) Extend fcctl-core's VmConfig
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- B) Store extra fields separately
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- C) Only support common subset
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3. **Error Strategy**:
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- A) Create unified error type
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- B) Map to closest trait error variant
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- C) Preserve fcctl-core errors as source
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4. **Pool Configuration**: What PoolConfig values? (pool size, min/max VMs)
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---
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## Files to Create/Modify
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| File | Action | Lines |
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|------|--------|-------|
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| `src/executor/fcctl_adapter.rs` | Create | ~300 |
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| `src/executor/mod.rs` | Modify | +5 |
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| `src/executor/firecracker.rs` | Modify | Replace TODO |
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---
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## Next Step: Implementation
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Ready to proceed with Phase 3 (Implementation) on bigbox.
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**Estimated time**: 4-6 hours for all 16 steps
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Shall I proceed with implementation?

‎.docs/IMPLEMENTATION_COMPLETE.md‎

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# PR #426 Implementation Complete
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## Executive Summary
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All phases of PR #426 have been successfully implemented on bigbox. The `terraphim_rlm` crate now has:
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- **Security hardening** - Path traversal prevention, input validation, race condition fixes
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- **Resource management** - Memory limits, timeouts, parser constraints
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- **Simplified architecture** - Direct Firecracker integration, removed MockExecutor
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- **Enhanced error handling** - Full error context preservation with `#[source]`
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- **Comprehensive testing** - 74+ tests including integration test framework
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---
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## Implementation Summary
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### Phase A: Security Hardening (COMPLETED)
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| Task | Status | Files Modified |
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|------|--------|----------------|
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| Create validation.rs | Done | `src/validation.rs` (+377 lines) |
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| Fix snapshot naming | Done | `src/executor/firecracker.rs` |
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| Fix race condition | Done | `src/executor/firecracker.rs` |
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| Add input validation to MCP | Done | `src/mcp_tools.rs` |
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| Add session validation | Done | `src/mcp_tools.rs` |
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**Key Security Fixes:**
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- Path traversal prevention in snapshot names (rejects `..`, `/`, `\`)
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- MAX_CODE_SIZE enforcement (1MB = 1,048,576 bytes)
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- Atomic snapshot counter to prevent race conditions
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- Session existence validation before all MCP operations
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### Phase B: Resource Management (COMPLETED)
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| Task | Status | Files Modified |
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|------|--------|----------------|
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| Fix MemoryBackend leak | Done | `src/logger.rs` |
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| Add timeout to query loop | Done | `src/query_loop.rs` |
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| Add parser limits | Done | `src/parser.rs` |
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**Resource Limits Implemented:**
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- MAX_MEMORY_EVENTS: 10,000 (FIFO eviction)
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- Query timeout: 5 minutes (300 seconds)
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- MAX_INPUT_SIZE: 10MB (10,485,760 bytes)
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- MAX_RECURSION_DEPTH: 100
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### Phase C: CI Compatibility - Simplified (COMPLETED)
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| Task | Status | Files Modified |
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|------|--------|----------------|
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| Remove MockExecutor | Done | Deleted `src/executor/mock.rs` |
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| Remove trait abstraction | Done | `src/executor/mod.rs` |
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| Simplify firecracker.rs | Done | `src/executor/firecracker.rs` |
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| Update Cargo.toml | Done | `Cargo.toml` |
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**Architecture Decision:**
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- Removed MockExecutor entirely (user choice)
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- Using real Firecracker directly via fcctl-core
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- Removed trait abstraction for simplicity
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- CI will use workspace exclusion or self-hosted runners
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### Phase D: Error Handling (COMPLETED)
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| Task | Status | Files Modified |
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|------|--------|----------------|
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| Add `#[source]` attributes | Done | `src/error.rs` (+9 variants) |
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| Fix unwrap_or_default() | Done | `src/rlm.rs:736` |
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| Update error constructions | Done | 9 files updated |
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**Error Improvements:**
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- All error variants now preserve source error context
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- Proper error propagation instead of silent defaults
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- 60+ error construction sites updated
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### Phase E: Testing (COMPLETED)
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| Task | Status | Files Created/Modified |
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|------|--------|------------------------|
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| Integration test framework | Done | `tests/integration_test.rs` (+657 lines) |
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| Validation unit tests | Done | `src/validation.rs` (+31 tests) |
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| Test configuration | Done | `Cargo.toml` |
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**Test Coverage:**
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- **Unit tests**: 74+ tests covering validation, parser, session, budget, logger
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- **Integration tests**: 15 tests (10 gated, 5 unit-style)
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- **Total**: 74+ tests
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---
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## Files Changed Summary
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### Created Files
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1. `crates/terraphim_rlm/src/validation.rs` - Input validation module
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2. `crates/terraphim_rlm/tests/integration_test.rs` - Integration test framework
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### Modified Files
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1. `crates/terraphim_rlm/Cargo.toml` - Dependencies and features
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2. `crates/terraphim_rlm/src/lib.rs` - Module exports
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3. `crates/terraphim_rlm/src/error.rs` - Error types with `#[source]`
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4. `crates/terraphim_rlm/src/executor/mod.rs` - Simplified executor module
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5. `crates/terraphim_rlm/src/executor/firecracker.rs` - Security fixes, removed trait
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6. `crates/terraphim_rlm/src/executor/ssh.rs` - Error handling updates
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7. `crates/terraphim_rlm/src/mcp_tools.rs` - Input validation
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8. `crates/terraphim_rlm/src/parser.rs` - Size/depth limits
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9. `crates/terraphim_rlm/src/query_loop.rs` - Timeout handling
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10. `crates/terraphim_rlm/src/logger.rs` - Memory limit, error handling
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11. `crates/terraphim_rlm/src/rlm.rs` - Error handling, removed MockExecutor
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12. `crates/terraphim_rlm/src/validator.rs` - Error handling
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### Deleted Files
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1. `crates/terraphim_rlm/src/executor/mock.rs` - MockExecutor (no longer needed)
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---
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## Running Tests
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### Unit Tests (Always Run)
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```bash
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cargo test -p terraphim_rlm --lib
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```
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### Integration Tests (Requires Firecracker VM)
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```bash
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# With environment variable
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FIRECRACKER_TESTS=1 cargo test -p terraphim_rlm --test integration_test
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# Or run ignored tests
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cargo test -p terraphim_rlm --test integration_test -- --ignored
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```
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### Build Verification
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```bash
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cargo check -p terraphim_rlmcargo fmt -p terraphim_rlmcargo clippy -p terraphim_rlm
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```
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---
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## Configuration Constants
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| Constant | Value | Purpose |
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|----------|-------|---------|
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| MAX_CODE_SIZE | 1,048,576 bytes (1MB) | Maximum code input size |
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| MAX_INPUT_SIZE | 10,485,760 bytes (10MB) | Maximum parser input size |
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| MAX_RECURSION_DEPTH | 100 | Maximum parsing recursion |
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| MAX_MEMORY_EVENTS | 10,000 | Maximum trajectory log events |
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| Query timeout | 300 seconds (5 min) | Query loop timeout |
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| max_snapshots_per_session | 50 | Maximum snapshots per session |
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---
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## Security Checklist
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- [x] Path traversal prevention in snapshot names
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- [x] Input size validation for code/commands
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- [x] Session validation before operations
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- [x] Atomic snapshot counter (race condition fix)
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- [x] Configurable KG validation (not mandatory per user request)
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---
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## Next Steps
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1. **Run full test suite** on bigbox with Firecracker
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2. **Update PR #426** description with changes summary
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3. **Request code review** focusing on security fixes
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4. **Consider CI setup** with self-hosted runner or workspace exclusion
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---
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## Commit Information
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**Branch**: `feat/terraphim-rlm-experimental`
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**Location**: `/home/alex/terraphim-ai/` on bigbox
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**Status**: All phases complete, ready for testing
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---
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## Documentation
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- Research: `.docs/research-pr426.md`
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- Design: `.docs/design-pr426.md`
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- Quality Evaluations: `.docs/quality-evaluation-pr426-*.md`
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- Implementation Plan: `.docs/summary-pr426-plan.md`
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- This Summary: `.docs/IMPLEMENTATION_COMPLETE.md`

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