Research-Stack/6-Documentation/docs/external_sem_entity_diff_probe_2026-05-09.md

External sem Entity-Diff Probe

Date: 2026-05-09

Decision

• Status: OPTIONAL_AUDIT_AID_READY
• No implementation code was imported.
• No repository dependency was added.
• Use only as an optional external audit aid unless explicitly vendored later.

Why It Helps

• Primary fit: FAIL-WORKTREE-SCOPE-007, because entity-level diffs reduce broad dirty-tree risk.
• Secondary fit: FAIL-RECEIPT-GATE-006, because entity IDs can be attached to receipt and rollback checklists.
• It does not close security, coefficient, topology prediction, or FPGA transport gates by itself.

Tool Boundary

• Source: https://github.com/Ataraxy-Labs/sem
• License: MIT OR Apache-2.0
• Requested binary: /tmp/sem_probe/sem/crates/target/release/sem
• Version result: sem 0.5.3
• /usr/bin/sem collision: True

Entity Probe

4-Infrastructure/shim/stack_fail_closure_register.py

• Status: PASS
• function load_json lines 20-21
• function ticket lines 24-43
• function build_register lines 46-215
• function build_doc lines 218-252
• function main lines 255-261

4-Infrastructure/shim/tang9k_uart_beacon_probe.py

• Status: PASS
• function read_port lines 18-50
• function main lines 53-83

4-Infrastructure/shim/stack_solidification_audit.py

• Status: PASS
• class CmdResult lines 43-49
• function rel lines 52-53
• function run_cmd lines 56-72
• function load_json lines 75-76
• function file_sha256 lines 79-86
• function json_gate lines 89-105
• function py_compile_gate lines 108-111
• function compiler_gate lines 114-127
• function tri_cycle_gate lines 130-150
• function lean_gate lines 153-157
• function hardware_bitstream_gate lines 160-168
• function worktree_gate lines 171-194
• function build_doc lines 197-259
• function main lines 262-290

4-Infrastructure/shim/rrc_tri_cycle_audit.py

• Status: PASS
• class CmdResult lines 106-112
• function run_cmd lines 115-131
• function load_json lines 134-135
• function load_uart_beacon_diagnostics lines 138-194
• function scan_less_solid_surfaces lines 197-216
• function bucket_for_line lines 219-231
• function run_q16_witnesses lines 234-308
• function summarize_rrc lines 311-331
• function bucket_counts lines 334-338
• function active_gate_register lines 341-347
• function build_doc lines 350-419
• function main lines 422-491

Machine Receipt

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