regenerate-snapshots

name	regenerate-snapshots
description	Regenerate C# snapshot tests and spy stdlib after intentional codegen changes

Regenerate all generated artifacts after intentional codegen changes:

1. .expected.cs snapshot files for file-based integration tests
2. .spy stdlib generated C# files (src/Sharpy.Stdlib/)

Usage: /regenerate-snapshots

Behavior:

• Builds the solution
• Regenerates spy stdlib C# via build_tools/regenerate_spy_stdlib.sh
• Sets UPDATE_SNAPSHOTS=true and runs file-based integration tests to update snapshots
• On success: Shows completion summary
• On failure: Shows last 80 lines + points to full log

Warning: This modifies .expected.cs and stdlib .cs files. Review the changes with git diff afterwards.

Log location: .claude/tmp/last-snapshot-regen.log

Workflow:

1. Run /regenerate-snapshots to update all generated artifacts
2. Run git diff to review changes
3. If changes are intentional: git add . && git commit
4. If changes are unintentional: git checkout -- src/**/*.expected.cs src/Sharpy.Stdlib/

Steps

1. Run mkdir -p .claude/tmp to ensure log directory exists
2. Clear the old log with rm -f .claude/tmp/last-snapshot-regen.log
3. Build first: dotnet build sharpy.sln --nologo -v q >> .claude/tmp/last-snapshot-regen.log 2>&1. If build fails, print "=== BUILD FAILED — cannot regenerate ===" then tail -30 .claude/tmp/last-snapshot-regen.log and stop.
4. Regenerate spy stdlib: bash build_tools/regenerate_spy_stdlib.sh >> .claude/tmp/last-snapshot-regen.log 2>&1. If it fails, print "=== STDLIB REGENERATION FAILED (last 30 lines) ===" then tail -30 .claude/tmp/last-snapshot-regen.log and stop.
5. Run: UPDATE_SNAPSHOTS=true dotnet test --filter "FullyQualifiedName~FileBasedIntegrationTests" --no-build >> .claude/tmp/last-snapshot-regen.log 2>&1
6. Check exit code:
   • Exit 0: Print "=== REGENERATION COMPLETE (snapshots + stdlib) ===" then tail -30 .claude/tmp/last-snapshot-regen.log
   • Exit non-zero: Print "=== SNAPSHOT REGENERATION FAILED (last 80 lines) ===" then tail -80 .claude/tmp/last-snapshot-regen.log, then echo "=== Full log: .claude/tmp/last-snapshot-regen.log ==="
7. Return the actual exit code