Research-Stack/6-Documentation/docs/stack_fail_closure_register_2026-05-09.md

Stack Fail Closure Register

Date: 2026-05-09

This register turns current failures into closure gates. It does not mark them solved.

Summary

• Tickets: 7
• Promotion decision: NO_PROMOTION
• FPGA software status: PASS
• FPGA hardware status: NOT_REQUESTED

Tickets

FAIL-FPGA-UART-001 Live fabric UART transport has no observable bytes

• Class: fpga_transport_or_witness_debt
• Status: BLOCKED
• Owner surface: 6-Documentation/docs/fpga_uart_route_analysis_2026-05-09.md
• Evidence: Q16 software witness passes
• Evidence: Q16 hardware witness returns short receipt frames
• Evidence: TX-only beacon standard pins produced zero bytes on ttyUSB0 and ttyUSB1
• Evidence: TX-only beacon swapped pins produced zero bytes on ttyUSB0 and ttyUSB1
• Evidence: Old faXX/ffXX direct-probe interpretation is superseded as bridge/MPSSE behavior, not fabric proof
• Evidence: FPGA UART route analysis identifies the onboard BL702 bridge route as blocked and recommends external USB-UART
• Evidence: Forced JTAG reset plus SRAM reload succeeds, but beacon/Q16 UART receipts remain empty
• Evidence: Loopback-after-JTAG-clear diagnostic produced faXX-style bytes on ttyUSB0, consistent with bridge/MPSSE behavior rather than a valid fabric receipt
• Evidence: PTY-backed virtual serial Q16 probe: PASS_VIRTUAL_SERIAL (3/3 matches)
• Evidence: UART transport router active route: virtual://q16-pty (PASS_ACTIVE_VIRTUAL_ROUTE)
• Closure gate: external USB-UART or verified onboard bridge captures beacon payload a6425131360a
• Closure gate: loopback or beacon receipt passes before Q16 accelerator retry
• Closure gate: Q16 hardware receipts match software receipts for shift, weighted, and monotone cases
• Next action: Attach external USB-UART: adapter TX to fabric RX pin 18, adapter RX to fabric TX pin 17, and GND to GND
• Next action: Probe the new adapter path, usually /dev/ttyUSB2 or /dev/ttyACM0, with the TX-only beacon before Q16
• Next action: If external UART works, patch host default port or call scripts with --port and rerun Q16 hardware receipts
• Next action: If external UART fails, inspect PNR pin placement and add LED-observed heartbeat fallback

FAIL-FPGA-FLASH-002 Durable flash programming readback fails

• Class: fpga_transport_or_witness_debt
• Status: HELD_SRAM_ONLY
• Owner surface: 6-Documentation/docs/fpga_rrc_q16_accel_setup_2026-05-09.md
• Evidence: SRAM load passes CRC
• Evidence: Flash programming attempt had readback CRC failure
• Closure gate: flash write and readback CRC pass for the exact Q16 bitstream
• Closure gate: or documentation keeps SRAM-only boundary explicit
• Next action: Keep SRAM-only claim boundary until flash command and board target are verified
• Next action: Do not mark hardware install persistent

FAIL-SECURITY-BEAVER-003 Adaptive Beaver coefficients are not privacy-equivalent masks yet

• Class: security_proof_debt
• Status: HOLD
• Owner surface: Network-Topology-Theory.md + Fundamental_Network_Topology_Equation.md
• Evidence: 6 security proof debt surfaces found
• Evidence: tri-cycle audit blocks promotion for adaptive mask claims
• Evidence: mask freshness negative controls: PASS_NEGATIVE_CONTROLS
• Evidence: mask freshness case count: 6
• Closure gate: formal independence/freshness theorem exists
• Closure gate: secret-sharing non-reuse receipt exists
• Closure gate: negative control shows adapted coefficients do not leak party inputs
• Next action: Add a Lean-facing finite-state mask freshness model
• Next action: Generate negative-control fixtures for repeated coefficients and topology-derived coefficients

FAIL-COEFFICIENT-CALIBRATION-004 Numeric weights remain receipt-weighted priors, not calibrated coefficients

• Class: coefficient_or_calibration_debt
• Status: HOLD
• Owner surface: shared-data/network_topology_database.json
• Evidence: 20 coefficient/calibration debt surfaces found
• Evidence: receipt reweighting exists, but coefficient calibration and negative controls remain open
• Evidence: coefficient HOLD manifest rows: 9
• Closure gate: dataset provenance receipt linked
• Closure gate: coefficient calibration receipt linked
• Closure gate: sensitivity sweep and negative controls pass
• Next action: Create coefficient calibration fixture manifest
• Next action: Separate hypothesis weights from calibrated weights in docs and JSON surfaces

FAIL-TOPOLOGY-PREDICTION-005 Topology predictions are not validation claims

• Class: topology_prediction_debt
• Status: HOLD
• Owner surface: shared-data/network_topology_database.json
• Evidence: 13 topology prediction debt surfaces found
• Evidence: tri-cycle audit requires pre-registered target and independent comparison
• Evidence: prediction HOLD registry rows: 15
• Closure gate: pre-registered prediction target exists
• Closure gate: outcome receipt exists
• Closure gate: independent public map or measurement comparison exists
• Next action: Create prediction-target registry with timestamps and immutable receipt hashes
• Next action: Move existing predicted nodes into HOLD prediction queue, not validation table

FAIL-RECEIPT-GATE-006 Route promotion lacks complete receipt and rollback closure

• Class: receipt_gate_debt
• Status: HOLD
• Owner surface: 4-Infrastructure/shim/rainbow_raccoon_compiler.py
• Evidence: 11 receipt-gate debt surfaces found
• Evidence: compiler keeps 6 objects HOLD and only 1 candidate
• Evidence: compiler receipt hash: c006c48939fd12a280642e4fb70841fe502641d4c80233bef00b3c710e3f31ba
• Evidence: optional sem entity probe: OPTIONAL_AUDIT_AID_READY
• Evidence: HOLD closure checklist: 0 open documentation closures after RRC Gatekeeper refresh
• Closure gate: validation receipt exists
• Closure gate: rollback hash exists
• Closure gate: exact replay or decode closure hash matches
• Next action: Rerun compiler promotion against the refreshed rrc_hold_closure_checklist.json
• Next action: Do not widen candidate admission beyond Q16 until Lean or independent replay closes

FAIL-WORKTREE-SCOPE-007 Broad worktree is too dirty for safe sweep commit

• Class: release_hygiene_debt
• Status: BLOCKED_FOR_BROAD_STAGE
• Owner surface: 6-Documentation/docs/stack_solidification_staging_manifest_2026-05-09.md
• Evidence: worktree status: DIRTY
• Evidence: changed/untracked count: 949
• Evidence: staging manifest created for the solidification slice
• Evidence: optional sem entity probe: OPTIONAL_AUDIT_AID_READY
• Closure gate: commit scope is explicit file list
• Closure gate: generated artifacts are intentionally included or excluded
• Closure gate: no unrelated modified Lean/doc/probe files are swept in
• Closure gate: entity-level change list exists for staged or scoped files when sem is available
• Next action: Use stack_solidification_staging_manifest_2026-05-09.md before any commit
• Next action: Create separate manifests for CPU/logogram/wiki maturation slices if needed
• Next action: Use /tmp/sem_probe/sem/crates/target/release/sem, not /usr/bin/sem, unless a durable sem binary is installed

Machine Receipt

• shared-data/data/stack_solidification/stack_fail_closure_register.json