feat(C++): add C++/CMake/MSBuild/PowerShell command handlers

[isink17]

C++ / MSBuild / PowerShell handler support

Adds token filtering for C++ build toolchains and PowerShell commands
used in Windows-native MSVC development workflows.

New handlers

Command	Filter	Savings
cmake --build	GCC/Clang errors only	~85%
cmake -B	CMake errors + key settings	~70%
ctest	Failed tests only	~85%
make / ninja	Build errors only	~80%
msbuild	MSVC C/LNK errors only	~80%
codegraph index	Summary line only	~90%
rtk grep on MSBuild log	97.39% (308 KB → 8 KB)	real log
rtk read on MSBuild log	97.16% (308 KB → 8.7 KB)	real log

Benchmarks measured on a real 308 KB UTF-16 LE MSBuild solution log.

PowerShell auto-rewrites

Raw	Rewritten to
Select-String -Path f -Pattern p	rtk grep p f
Get-Content <file>	rtk read <file>
GC <file>	rtk read <file>
Remove-Item <path> -Force	ok <basename>
msbuild ... *> file.log	redirect hint + log path

Key implementation notes

• MSBuild stderr capture — link.exe writes to stderr; handler
  merges both streams so LNK errors are never silently dropped
• UTF-16 LE support — MSBuild logs on Windows are UTF-16 LE;
  rtk read now detects BOM, transcodes, then applies MSBuild filter
• MSBuild log auto-detection — rtk read samples first 200 lines
  to detect MSBuild format and route through the msbuild filter pipeline
• make install/clean exclusion — implemented procedurally since the
  regex crate has no negative lookahead
• codegraph — MCP tool calls (context_for_task, find_callers etc.)
  bypass the bash hook entirely; only CLI commands are filtered

Known limitation

*> PowerShell redirect is detected at rewrite time and emits a log
path hint, but RTK cannot intercept the build output in transit — the
shell consumes *> before the hook runs. Workflow: build with *>,
then rtk read <logfile>.

Tests

1643 pass, 0 fail. cargo fmt --check clean.
11 fixtures in tests/fixtures/cpp/.

[CLAassistant]

All committers have signed the CLA.

[pszymkowiak]

[w] wshm · Automated triage by AI

📊 Automated PR Analysis

✨ Type	feature
🟡 Risk	medium

Summary

Adds comprehensive C++/CMake/MSBuild/PowerShell command handlers to RTK, including token-filtering for build toolchain output (cmake, make, ninja, msbuild, ctest, codegraph) and automatic rewriting of PowerShell commands (Select-String, Get-Content, Remove-Item) into RTK equivalents. Includes UTF-16 LE support for MSBuild logs, stderr merging for link.exe, and MSBuild log auto-detection.

Review Checklist

• Tests present
• Breaking change
• Docs updated

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Analyzed automatically by wshm · This is an automated analysis, not a human review.

[mgerhardy]

googletest would be great, too - but this is already really helpful - thanks a lot

[isink17]

googletest would be great, too - but this is already really helpful - thanks a lot

Added a narrow ctest/GoogleTest-style output filter. It keeps failure blocks + failed summaries, drops passing-test noise, handles ctest -V prefixes, and filters combined stdout/stderr.

[isink17]

I've noticed potential room for optimization so adding a commit for it as well