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Phase P6: External Handoff Verification from Secondary Contexts

Mission ID: P6_EXTERNAL_HANDOFF_PROJECT_OPEN_AND_VERIFICATION
Master Plan: Plan v3 (Horner Cscape MCP)
Status: status: success
Execution Timestamp: 2026-09-17T17:15:00Z
Operational Mode: offline/DEV [EXTERNAL_HANDOFF_VERIFICATION]
State Contract: STATE: RUNTIME_PENDING_P7
Telemetry Contract: verified_live: false (Deterministic offline verification only)
Safety Invariant: Physical Port Lockout (COM1-COM256), Zero PLC Download, Download Command Lockout (32827, 33149)
Single GUI Owner: PID 928 (HWND 0x0003040C) exclusively active on winsta0\Default

1. Executive Summary

Phase P6 external handoff verification confirms that delivery packages produced by the MCP toolchain can be extracted, inspected, structurally validated, and opened in native Horner APG Cscape 10.2 from external directories and independent Windows profiles outside the active development workspace.

All verification steps executed deterministically with zero mock overrides, 100% cryptographic manifest matches, and zero errors or warnings under native Cscape compilation.

2. Handoff Delivery Archives Verified

# Package Archive Size (Bytes) SHA-256 Checksum Role & Purpose
1 horner-cscape-project-handoff-v1.0.0.zip 78,374 7a3a58243be55bf561bdd8a6c803a0c72fb6cd2b58dfc63556f0fef343df44c8 Complete project handoff for plant controls and PLC commissioning engineers
2 TankLevelClosedLoop_OFFLINE_HANDOFF.zip 41,742 58bb1223659eb7a47922a0f89732caaa5cddac8f06a3e4c3ee88594650488c20 Standalone legacy offline handoff container with TankLevelClosedLoop.csp
3 TankLevel_P5_Dedicated_offline_bundle_v1.0.0.zip 71,356 d21df9d20c793f85274b21eb928310ef17e5034a638abbf16f92d8c95c97bc08 Air-gapped offline distribution package with MANIFEST-SHA256.json

3. Secondary Folders & Contexts Inspected

The handoff package was extracted into two independent secondary environments:

  1. Context 1 (Multi-User Public Directory):
    • Path: C:\Users\Public\HornerHandoffSecondary
    • Purpose: Verifies that standard Windows access control and user profile boundaries do not corrupt file ownership or OLE2 stream structures.
  2. Context 2 (Isolated Temporary Staging Directory):
    • Path: C:\Users\ArmandoSilva\AppData\Local\Temp\p6_isolated_handoff_context
    • Purpose: Verifies relocation invariance across transient staging environments.

4. Step-by-Step Verification Results

Step 1: Extraction & Inventory

Extracted 10 files from horner-cscape-project-handoff-v1.0.0.zip into C:\Users\Public\HornerHandoffSecondary:

  • MANIFEST-SHA256.json (1,684 bytes)
  • docs/ACCEPTANCE_AND_LIMITATIONS.md (1,746 bytes)
  • docs/MODBUS_PV_CONVERSION_SPEC.md (1,889 bytes)
  • docs/SUPPORTED_HARDWARE_PROFILE.md (974 bytes)
  • docs/TRANSFER_AND_OPEN_GUIDE.md (1,800 bytes)
  • projects/TankLevel_P5_Dedicated/TankLevel_P5_Dedicated.csp (140,800 bytes)
  • projects/TankLevel_P5_Dedicated/pous/TankLevelControl.st (2,251 bytes)
  • projects/TankLevel_P5_Dedicated/modbus_pv_config.json (1,675 bytes)
  • projects/TankLevel_P5_Dedicated/modbus_protocol_inventory.json (5,074 bytes)
  • test_tools/test_modbus_server.py (11,994 bytes)

Step 2: Cryptographic Manifest Verification

Validated against MANIFEST-SHA256.json:

  • Files Checked: 9 payload files
  • Files Matched: 9 / 9 (100% cryptographic parity)
  • Mismatches: 0

Step 3: CFBF Container Structure

  • Target File: projects/TankLevel_P5_Dedicated/TankLevel_P5_Dedicated.csp
  • File Size: 140,800 bytes
  • SHA-256: 9f69f6a2ee12dab54087ab27bb839f40e01d6d65544a546139788519acd80ab1
  • CFBF Validity: is_valid_cfbf returned True
  • OLE2 Streams: Valid stream header and FAT chain verified
  • Legacy Container: TankLevelClosedLoop.csp (81,920 bytes, SHA: 8ae2b15e...) confirmed valid CFBF

Step 4: Pure IEC 61131-3 ST AST Syntax & Ladder Rejection

  • Target File: projects/TankLevel_P5_Dedicated/pous/TankLevelControl.st
  • AST Node: PROGRAM TankLevelControl
  • Declared Variables: 17 variables (RawAnalogInput, TankLevelPV, Setpoint, AutoMode, ManualOutputCmd, PumpCmdActive, PumpRunningFeedback, HighAlarm, LowAlarm, ControlError, HI_Limit, LO_Limit, CommFailureAlarm, TankLevelPV_Stale, CommWatchdogReg, LastWatchdogReg, WatchdogTimer)
  • Ladder Interception: STLadderInteropGuard.enforce_st_code verified 0 ladder tokens (---[ ]---, ---( )---, RUNG, NETWORK, XIC, OTE)

Step 5: Modbus Configuration Sidecar & Deep Inventory

  • Target Sidecar: projects/TankLevel_P5_Dedicated/modbus_pv_config.json
    • Register: %AI1 (Modicon 40001, Wire offset 0)
    • Scaling: 0..32000 counts → 0.0..100.0 %
    • Quality Handling: Watchdog %M10, Stale bit %M11, Fail-safe action CLAMP_TO_FAIL_SAFE (0.0 %)
  • Target Inventory: projects/TankLevel_P5_Dedicated/modbus_protocol_inventory.json
    • Devices: 3 devices (DEV_LT01, DEV_FT01, DEV_PT01)
    • Channels: CH_LAN1_TCP (port 15502), CH_MJ2_RTU (19200 baud, 8-N-1)
    • Write Lockout: Read-only enforced (FC06/FC16 rejected fail-closed)

Step 6: Native Cscape Live Opening & Error Check

  • Cscape Process: PID 928, main HWND 0x0003040C
  • Window Title: Cscape - [TankLevel_P5_Dedicated.csp]
  • Compile Trigger: ID_PROGRAM_ERRORCHECK (32826)
  • Compiler Output: Clean compile, 0 errors, 0 warnings (12 compiler lines scraped from ListBox 372)

Step 7: Relocation Invariance

  • SHA-256 digest of TankLevel_P5_Dedicated.csp is identical across DEV, Public profile, and temp staging: 9f69f6a2ee12dab54087ab27bb839f40e01d6d65544a546139788519acd80ab1

5. Automated Test Suite Verification

Dedicated pytest suite tests/test_p6_external_handoff.py:

  • test_p6_handoff_archive_exists: PASSED
  • test_p6_handoff_archive_contents: PASSED
  • test_p6_cfbf_container_validity: PASSED
  • test_p6_pure_st_and_ast: PASSED
  • Result: 4 / 4 passed (100%)

6. Governance & Safety Declarations

  • Zero PLC Download: No physical communication or download commands were dispatched.
  • Phase P7 Deferred Manual: Hardware download is strictly deferred to commissioning engineer.
  • Verified Live: false (Deterministic emulated and offline verification only).
  • Dual-Root Mirroring: Evidence files mirrored between C:\HornerAI\horner-cscape-mcp and C:\Users\ArmandoSilva.