runtime/hints: add since() helper for hint templates #48
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Summary
Add a generic
since(from,to)function to the hint template FuncMap that returns the number of seconds between two timestamps (to - from). This enables downstream services to conditionally show duration-aware hints (e.g., "this may take a minute" for windows exceeding 6 months).Changes
runtime/agent/runtime/hints/hints.go: Addsincehelper +parseTimestampsupporting RFC3339 strings andtime.Timevaluesruntime/agent/runtime/hints/hints_test.go: Table-driven tests forsinceviaCompileHintTemplatesAGENTS.md: Expand repo-wide coding guidelinesExample usage
Test evidence
make lint✅make test✅