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msd-core/tests
Tom Boucher 47ed26a01b fix(#3120): add register_authored_at_plan_time guard — prevent rubber-stamping legacy phases (#3142)
* fix(#3120): add register_authored_at_plan_time guard to secure-phase

Root cause: Step 3 short-circuit used threats_open: 0 as the sole
condition to skip directly to Step 6 (write clean SECURITY.md). It
did not distinguish empty-by-all-mitigated from empty-by-no-planning.
Legacy phases authored before <threat_model> blocks were canonical
received a rubber-stamped clean SECURITY.md with no audit performed.

Fix:
  Step 2c: track register_authored_at_plan_time (true iff >=1 PLAN
           file contained a parseable <threat_model> block)
  Step 3:  two-condition short-circuit:
           - threats_open:0 AND register_authored_at_plan_time:true
             -> skip to Step 6 (legitimate, all mitigated)
           - threats_open:0 AND register_authored_at_plan_time:false
             -> retroactive-STRIDE mode in Step 5 (build register
                from implementation, then verify)
  Step 5:  auditor constraint varies by mode:
           planned     -> Verify mitigations exist, do not scan
           retroactive -> Build STRIDE register first, then verify

Suite: 7039/7039. Closes #3120.

* fix(lint+changeset): allow-test-rule, drop dead regex branches, fix pr field to 3142
2026-05-05 15:02:19 -04:00
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