Terraphim AI documentation

Phase 4 Verification Report: Auto-Update Feature

Status: COMPLETED Phase: 4 - Disciplined Verification Date: 2026-01-09 Verifier: Phase 4 Verification Agent

Executive Summary

This verification report analyzes the implementation of the automatic update feature for terraphim-ai against the design document (DESIGN-AUTO-UPDATE.md) and research document (RESEARCH-AUTO-UPDATE.md). The implementation includes 9 source files and 1 test file in the terraphim_update crate, plus CLI integration in terraphim_cli.

Overall Result: NO-GO - Critical security defect requires remediation before production use.

Test Summary

  • Total Tests: 109
  • Passed: 109 (100%)
  • Failed: 0
  • Ignored: 0

Critical Findings

  1. CRITICAL: Signature verification is a placeholder - does not perform actual cryptographic verification
  2. MEDIUM: Missing security_test.rs file required by design
  3. LOW: Minor unused variable warnings in test code

1. Traceability Matrix

1.1 Design Requirement to Implementation Mapping

| Design Requirement | Source | Implementation | Status | Test Coverage | |-------------------|--------|----------------|--------|---------------| | UpdateConfig struct | DESIGN Step 1 | config.rs:21-35 | IMPLEMENTED | 4 tests | | UpdateInfo struct | DESIGN Step 1 | config.rs:45-60 | IMPLEMENTED | 2 tests | | UpdateHistory struct | DESIGN Step 1 | config.rs:62-100 | IMPLEMENTED | 6 tests | | UpdateCheckEntry | DESIGN Step 1 | config.rs:102-120 | IMPLEMENTED | 2 tests | | UpdateCheckResult | DESIGN Step 1 | config.rs:122-145 | IMPLEMENTED | 2 tests | | UpdateStatus enum | DESIGN Step 2 | lib.rs:23-39 | IMPLEMENTED | 4 tests | | UpdateError enum | DESIGN Step 2 | NOT FOUND | MISSING | N/A | | State persistence (save/load) | DESIGN Step 3 | state.rs:1-200 | IMPLEMENTED | 10 tests | | Scheduler (should_check) | DESIGN Step 4 | scheduler.rs:1-400 | IMPLEMENTED | 8 tests | | Background scheduler | DESIGN Step 4 | scheduler.rs:100-300 | IMPLEMENTED | 4 tests | | Notification system | DESIGN Step 5 | notification.rs:1-300 | IMPLEMENTED | 16 tests | | PGP signature verification | DESIGN Step 6 | signature.rs:1-450 | PLACEHOLDER | 15 tests (invalid) | | Rollback system | DESIGN Step 7 | rollback.rs:1-736 | IMPLEMENTED | 20 tests | | Interactive prompts | DESIGN Step 8 | notification.rs:200-250 | PARTIAL | 1 test | | Platform-specific logic | DESIGN Step 15 | platform.rs:1-300 | IMPLEMENTED | 10 tests | | Download with retry | DESIGN (implied) | downloader.rs:1-496 | IMPLEMENTED | 13 tests (all passing) | | CLI check-update command | DESIGN Step 12 | terraphim_cli/src/main.rs:114-116 | IMPLEMENTED | Manual | | CLI update command | DESIGN Step 12 | terraphim_cli/src/main.rs:117-118 | IMPLEMENTED | Manual | | CLI rollback command | DESIGN Step 12 | terraphim_cli/src/main.rs:120-124 | IMPLEMENTED | Manual | | Integration tests | DESIGN Step 16 | tests/integration_test.rs:1-530 | IMPLEMENTED | 17 tests | | Security tests | DESIGN Step 17 | NOT FOUND | MISSING | N/A |

1.2 File Mapping

| Design File | Implementation File | Status | |------------|---------------------|--------| | config.rs | crates/terraphim_update/src/config.rs | Match | | scheduler.rs | crates/terraphim_update/src/scheduler.rs | Match | | notification.rs | crates/terraphim_update/src/notification.rs | Match | | state.rs | crates/terraphim_update/src/state.rs | Match | | verification.rs | crates/terraphim_update/src/signature.rs | Name differs, placeholder impl | | rollback.rs | crates/terraphim_update/src/rollback.rs | Match | | prompt.rs | NOT FOUND (merged into notification.rs) | Partial | | platform.rs | crates/terraphim_update/src/platform.rs | Match (not in design, added) | | downloader.rs | crates/terraphim_update/src/downloader.rs | Match (not in design, added) | | integration_test.rs | crates/terraphim_update/tests/integration_test.rs | Match | | security_test.rs | NOT FOUND | MISSING |

2. Test Results Analysis

2.1 Passing Tests by Module (109 total)

| Module | Tests | Status | |--------|-------|--------| | config.rs | 10 | All Pass | | scheduler.rs | 12 | All Pass | | notification.rs | 16 | All Pass | | state.rs | 10 | All Pass | | platform.rs | 10 | All Pass | | rollback.rs | 20 | All Pass | | signature.rs | 15 | All Pass (but invalid - placeholder) | | downloader.rs | 6 | All Pass | | lib.rs | 10 | All Pass |

2.2 Previously Failing Tests (Now Fixed)

The downloader tests previously failed due to file:// URL incompatibility with ureq HTTP client. These have been fixed by using httpbin.org for network tests:

| Test | Status | |------|--------| | test_download_silent_local_file | FIXED - Uses httpbin.org | | test_download_max_retries | FIXED | | test_download_with_timeout | FIXED | | test_download_invalid_url | FIXED | | test_download_creates_output_file | FIXED | | test_download_result_success | FIXED |

3. Defect Register

3.1 Critical Defects

| ID | Description | Severity | Originating Phase | File | Line(s) | |----|-------------|----------|-------------------|------|---------| | DEF-001 | Signature verification always returns Valid without cryptographic verification | CRITICAL | Design (Phase 2) / Implementation (Phase 3) | signature.rs | 58-80, 115-136, 170-205 |

DEF-001 Details:

// Current implementation (signature.rs:58-80)
pub fn verify_signature(
    _binary_path: &Path,
    _signature_path: &Path,
    _public_key: &str,
) -> Result<VerificationResult> {
    // ... file existence checks ...
    Ok(VerificationResult::Valid)  // ALWAYS RETURNS VALID!
}

The design document explicitly requires PGP signature verification (DESIGN Step 6), but the implementation is a placeholder that:

  1. Does not read the signature file contents
  2. Does not parse or verify the public key
  3. Does not perform any cryptographic operations
  4. Always returns VerificationResult::Valid if both files exist

Security Impact: Attackers could provide any file as a "signature" and pass verification. This completely defeats the purpose of signature verification for supply chain security.

3.2 High Severity Defects

| ID | Description | Severity | Originating Phase | File | Line(s) | |----|-------------|----------|-------------------|------|---------| | DEF-002 | Downloader tests fail with file:// URLs | ~~HIGH~~ RESOLVED | Implementation (Phase 3) | downloader.rs | 386-494 | | DEF-003 | Missing security_test.rs file | HIGH | Design (Phase 2) | N/A | N/A |

DEF-002 Details: RESOLVED The tests previously failed due to ureq not supporting file:// URLs. Tests now use httpbin.org for HTTP testing and all pass.

DEF-003 Details: Design document specifies tests/security_test.rs (DESIGN Step 17) with specific security verification tests:

  • test_pgp_signature_valid
  • test_pgp_signature_invalid
  • test_pgp_signature_tampered_binary
  • test_update_rejects_unsigned_binary
  • test_binary_path_validation
  • test_binary_permissions_read_only

None of these security tests exist in the implementation.

3.3 Medium Severity Defects

| ID | Description | Severity | Originating Phase | File | Line(s) | |----|-------------|----------|-------------------|------|---------| | DEF-004 | UpdateError enum not implemented | MEDIUM | Implementation (Phase 3) | lib.rs | N/A | | DEF-005 | prompt.rs not implemented as separate module | MEDIUM | Implementation (Phase 3) | N/A | N/A |

DEF-004 Details: The design specifies a comprehensive UpdateError enum with variants:

  • CheckFailed
  • DownloadFailed
  • InstallationFailed
  • PermissionDenied
  • NetworkError
  • SignatureVerificationFailed
  • RollbackFailed
  • BackupFailed
  • ConfigError
  • Timeout
  • NoUpdateAvailable
  • AlreadyUpToDate
  • UserCancelled

The implementation uses generic anyhow::Error instead, losing type-safe error handling.

3.4 Low Severity Defects

| ID | Description | Severity | Originating Phase | File | Line(s) | |----|-------------|----------|-------------------|------|---------| | DEF-006 | Unused variable warnings | LOW | Implementation (Phase 3) | scheduler.rs | 382 | | DEF-007 | Unused import warning | LOW | Implementation (Phase 3) | integration_test.rs | 119 |

4. Coverage Analysis

4.1 Code Coverage by Module

| Module | Estimated Line Coverage | Test Quality | |--------|------------------------|--------------| | config.rs | >90% | Good | | scheduler.rs | >85% | Good | | notification.rs | >90% | Good | | state.rs | >90% | Good | | platform.rs | >85% | Good | | rollback.rs | >95% | Excellent | | signature.rs | >90% | Invalid (tests placeholder) | | downloader.rs | >85% | Good (all passing) | | lib.rs | >80% | Good |

4.2 Missing Test Coverage

  1. Security verification tests - No tests for actual cryptographic operations
  2. Network failure scenarios - Limited testing of network error handling
  3. Permission denied scenarios - Partial coverage
  4. User prompt interaction - Minimal coverage
  5. Concurrent update attempts - Single test, limited scenarios

5. Design Compliance

5.1 Implemented Features

| Feature | Design Reference | Status | |---------|------------------|--------| | Check-on-startup mechanism | Data Flow section | Implemented | | Background update checking (tokio intervals) | Architecture section | Implemented | | Update state persistence | Data Flow section | Implemented | | Binary backup before update | Rollback Plan section | Implemented | | Backup rotation (max 3) | Rollback Plan section | Implemented | | SHA256 checksum for backup integrity | Implementation (bonus) | Implemented | | Platform-specific binary paths | Appendix section | Implemented (Linux/macOS) | | CLI update commands | Step 12 | Implemented | | Graceful network failure handling | Design Decisions | Implemented | | Update history tracking | UpdateHistory struct | Implemented |

5.2 Missing/Incomplete Features

| Feature | Design Reference | Status | Impact | |---------|------------------|--------|--------| | PGP signature verification | Step 6 | PLACEHOLDER | Critical | | UpdateError type-safe errors | Step 2 | Missing | Medium | | Security verification tests | Step 17 | Missing | High | | Interactive user prompts | Step 8 | Partial | Low | | terraphim_settings integration | Step 9 | Not verified | Medium | | terraphim_config integration | Step 10 | Not verified | Medium |

6. Recommendations

6.1 Critical (Must Fix Before Merge)

  1. DEF-001: Implement actual signature verification

    • Integrate with pgp or ring crate for cryptographic verification
    • Verify signatures against project's public key
    • Remove placeholder implementation
    • Add proper error handling for verification failures

  2. DEF-003: Create security_test.rs

    • Implement all security tests specified in design
    • Include positive and negative test cases
    • Test tampered binary detection
    • Test unsigned binary rejection

6.2 High Priority (Should Fix Before Production)

  1. ~~DEF-002: Fix downloader tests~~ RESOLVED - Tests now use httpbin.org and all pass.

  2. DEF-004: Implement UpdateError enum

    • Create type-safe error handling
    • Propagate specific error types
    • Enable better error reporting to users

6.3 Medium Priority (Should Fix in Follow-up)

  1. DEF-005: Review prompt functionality

    • Ensure interactive prompts work correctly
    • Add more comprehensive tests

  2. Verify crate integrations

    • Confirm terraphim_settings integration
    • Confirm terraphim_config integration

6.4 Low Priority (Can Defer)

  1. DEF-006, DEF-007: Fix warnings
    • Clean up unused variables and imports

7. Go/No-Go Decision

Decision: NO-GO

Rationale

The implementation cannot proceed to production due to:

  1. Security-Critical Defect (DEF-001): The signature verification is completely non-functional. The design explicitly requires PGP signature verification for security, but the implementation always returns "valid" regardless of input. This creates a severe supply chain attack vector.

  2. Missing Security Tests (DEF-003): The design-specified security tests are not implemented, meaning there is no verification that the security features work correctly.

Note: All 109 unit tests now pass (DEF-002 resolved).

Conditions for Go Decision

  1. DEF-001 must be remediated with actual cryptographic verification
  2. DEF-003 must be implemented with passing security tests
  3. ~~DEF-002 must be fixed (all tests passing)~~ COMPLETE
  4. Re-verification after fixes

8. Appendix

8.1 Test Execution Log

running 109 tests
test config::tests::test_update_config_default ... ok
test config::tests::test_update_check_result_variants ... ok
[... 101 more passing tests ...]
test downloader::tests::test_download_silent_local_file ... ok
test downloader::tests::test_download_max_retries ... ok
test downloader::tests::test_download_with_timeout ... ok
test downloader::tests::test_download_invalid_url ... ok
test downloader::tests::test_download_creates_output_file ... ok
test downloader::tests::test_download_result_success ... ok

test result: ok. 109 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

8.2 Files Analyzed

  • /home/alex/projects/terraphim/terraphim-ai/DESIGN-AUTO-UPDATE.md
  • /home/alex/projects/terraphim/terraphim-ai/RESEARCH-AUTO-UPDATE.md
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/lib.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/config.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/scheduler.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/notification.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/state.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/platform.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/rollback.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/signature.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/src/downloader.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_update/tests/integration_test.rs
  • /home/alex/projects/terraphim/terraphim-ai/crates/terraphim_cli/src/main.rs

8.3 Verification Methodology

  1. Read design and research documents to understand requirements
  2. Map design requirements to implementation files
  3. Execute test suite and analyze results
  4. Trace defects back to originating phase
  5. Build traceability matrix
  6. Assess coverage gaps
  7. Provide Go/No-Go recommendation

Report Generated: 2026-01-09 Last Updated: 2026-01-10 Verification Agent: Claude Opus 4.5 (Phase 4 Disciplined Verification)

Phase 5 Validation Report: Automatic Updates Feature Phase 2.1 Complete: Video Optimization ✅