[Kire (kireadmin)]

PR Summary

Index hashtable closing-brace offsets once before scanning tokens, replacing a full hashtable scan for every closing brace with constant-time membership checks. Add a regression test confirming script-block brace pairing remains correct in a script containing a hashtable.

Validation

• dotnet build Engine/Engine.csproj --no-restore --framework net8 --configuration PSV7Debug — passed (0 warnings, 0 errors).
• Focused PowerShell runtime check against the built Engine assembly — passed.
• Full Pester suite not run: this environment has Pester 3.4.0, while the repository requires Pester 6; the normal build script also expects .NET SDK 8.0.419, which is not installed. NuGet restore for the Engine project succeeded using nuget.org.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all .cs, .ps1 and .psm1 files have the correct copyright header
• Make sure you've added a new test if existing tests do not effectively test the code changed and/or updated documentation
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, add the prefix WIP: to the title and remove the prefix when it is ready.

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[Copilot]

🟡 Changes recommended

The brace-pairing test never exercises hashtable filtering and still passes if that filtering is removed, leaving the intended regression undetected.

1 open issue

• Add a hashtable inside the if block to test brace pairing · New

What changed in this PR

This PR optimizes brace pairing in the analyzer’s token operations by indexing hashtable closing-brace offsets instead of repeatedly scanning hashtable ASTs.

Changes:

• Replace per-brace scans with hash-set membership checks.
• Add a test for script-block brace pairing in a script containing a hashtable.

File	Description
Tests/​Engine/​TokenOperations.tests.ps1	Adds assertions for script-block brace pairing alongside a hashtable.
Engine/​TokenOperations.cs	Indexes hashtable end offsets for constant-time closing-brace checks.

_{Review effort: Balanced}