Python String Template: Missing Values Are Not Safe Output
Use Python string Template with explicit placeholders, strict substitution, context-aware escaping, and tests that catch incomplete rendered output.
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Python UUID: Choose Identifier Semantics Before a Version
Use Python UUID with deliberate version choices, canonical parsing, uniqueness constraints, privacy checks, and authorization separate from identifiers.
Git For-Each-Ref: Build Reports From Explicit Ref Fields
Use Git for-each-ref for scoped local reports, explicit fields and sorting, annotated-tag handling, and data-safe parsing without executing metadata.
Git Check-Ignore: Explain the Rule Behind a Hidden Path
Use Git check-ignore to trace ignore-rule sources, distinguish tracked paths and negation, and build reliable diagnostics without treating ignores as security.
PostgreSQL pg_stat_activity: Read Session State in Context
Use PostgreSQL pg_stat_activity to distinguish active queries, idle transactions, waits, snapshot freshness, and permission-limited diagnostic evidence.
PostgreSQL Jsonb_set: Update Paths Without Inventing Shape
Use PostgreSQL jsonb_set with explicit paths, existing-parent checks, JSON null rules, atomic updates, and concurrency tests for document changes.
Kubernetes Pod Termination: Drain Within the Real Budget
Plan Kubernetes Pod termination around shared grace time, preStop hooks, endpoint propagation, signal handling, sidecar ordering, and measured drain tests.
Docker Inspect: Explain Runtime State Without Leaking Data
Use Docker inspect to select exact object types, compare runtime state with deployment intent, interpret mounts and ports, and redact sensitive evidence.
HTTP 422 Unprocessable Content: Return Actionable Errors
Use HTTP 422 Unprocessable Content for semantic validation failures, stable field errors, privacy-aware messages, and clients that correct rather than retry.
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