H-5877: Add MIR builder testing framework to HashQL skill documentation

[indietyp]

Add MIR Builder Testing Support to HashQL Testing Documentation

🌟 What is the purpose of this PR?

This PR adds documentation and skill configuration for the MIR Builder testing approach in HashQL. It introduces a new testing strategy for MIR passes that allows programmatic construction of MIR bodies for unit testing.

🔍 What does this change?

• Adds MIR Builder to the skill-rules.json description for HashQL testing
• Updates the testing-hashql skill documentation to include MIR Builder as a fourth testing approach
• Adds a comprehensive MIR Builder guide with examples and patterns
• Updates the testing strategy table to include MIR pass unit tests

🛡 What tests cover this?

• Documentation changes only, no tests required

❓ How to test this?

1. Review the new MIR Builder guide to ensure it provides clear instructions
2. Verify the skill rules correctly identify MIR Builder related keywords and patterns
3. Check that the main skill documentation properly introduces the MIR Builder approach

Pre-Merge Checklist 🚀

🚢 Has this modified a publishable library?

This PR:

• does not modify any publishable blocks or libraries, or modifications do not need publishing

📜 Does this require a change to the docs?

The changes in this PR:

• are internal and do not require a docs change

🕸️ Does this require a change to the Turbo Graph?

The changes in this PR:

• do not affect the execution graph

[cursor]

PR Summary

Adds MIR Builder testing documentation, updates quick reference and references, and introduces a comprehensive guide for programmatic MIR test construction.

• Documentation (HashQL testing skill):
  • MIR Builder Tests: New section in .claude/skills/testing-hashql/SKILL.md with purpose, usage, and a quick example; adds MIR pass unit tests to the quick reference table.
  • References: Updates reference links to resources/* in SKILL.md.
• Guide:
  • Adds .claude/skills/testing-hashql/references/mir-builder-guide.md with detailed API, patterns, and test harness examples for building MIR bodies programmatically.

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[indietyp]

• BE-253: HashQL: Optimize away special casing for logical operators in MIR #8199
• BE-248, BE-252: HashQL: Implement Dead Local Elimination (DLE) and use bump allocator throughout passes #8198
• H-5877: Add MIR builder testing framework to HashQL skill documentation #8197 👈 (View in Graphite)
• BE-251: HashQL: Add benchmarks for MIR transformation passes #8196
• Update Rust toolchains to nightly-2025-12-15 #8172
• BE-249: Remove dependence on nightly allocator api in dependencies and modularize heap #8193
• H-5880: Adopt open Agent Skills standard #8201
• main

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[graphite-app]

Merge activity

• Dec 19, 4:16 PM UTC: Graphite rebased this pull request, because this pull request is set to merge when ready.