Law Tech Rants, the latest writing by Law Wen Feng
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Portable ACS Policies Need Azure Profile Validation
A portable ACS policy is not proof that a specific Azure provider profile supports or enforces every declared control.
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Azure Blueprints October 31, 2026 Readiness
Read: Azure Blueprints: October 31, 2026 ReadinessCheck Azure Blueprint definitions and assignments, preserve export evidence, and assign owners before the October 31, 2026 change boundary.
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What a Microsoft Foundry Toolbox Promotion Actually Establishes
Read: What a Microsoft Foundry Toolbox Promotion Actually EstablishesA source-grounded distinction between documented Toolbox promotion behavior and compatibility, rollback, and orchestration assumptions the documentation does not establish.
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Moving an Azure VM Between Virtual Networks The Delete-and-Recreate Constraint
Read: Moving an Azure VM Between Virtual Networks: The Delete-and-Recreate ConstraintAzure does not support in-place VNet moves for VMs; only disks survive a delete-and-recreate. Here is what the documentation explicitly guarantees, what it does not, and…
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Terraform Refresh-Only Mode Reconciling State With Out-of-Band Changes
Read: Terraform Refresh-Only Mode: Reconciling State With Out-of-Band ChangesWhen an incident forces a manual cloud edit, normal planning proposes to undo it. Refresh-only mode is the narrow tool that absorbs the change into state…
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PostgreSQL MVCC vs DDL When Migrations Silently Break Long-Running Snapshots
Read: PostgreSQL MVCC vs DDL: When Migrations Silently Break Long-Running SnapshotsPostgreSQL marks TRUNCATE and table-rewriting ALTER TABLE as not MVCC-safe. A long-running transaction that has not yet touched the table can see it empty after the…
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Reading Prompt Caching and Latency Together Across Microsoft Foundry Deployment Types
Read: Reading Prompt Caching and Latency Together Across Microsoft Foundry Deployment TypesEngineers on Microsoft Foundry who see TTLT fall but cached_tokens stay flat cannot tell cache work from throughput changes. Here is how to read the six…
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Speculative vs. Saved Terraform Plans Making CI Approval Match Execution
Read: Speculative vs. Saved Terraform Plans: Making CI Approval Match ExecutionA source-grounded Terraform CI pattern that separates plan exit codes, saved-plan approval and execution, while retaining backend-locking qualifications.
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