Add CLAUDE.md for Claude Code guidance

[bobstrecansky]

Summary

• Add CLAUDE.md with build/test commands, monorepo architecture overview, auto-instrumentation patterns, and code style conventions
• Helps Claude Code be productive in this repository without extensive codebase exploration

Test plan

• Verify CLAUDE.md content is accurate and useful

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.56%. Comparing base (1d302df) to head (c030adc).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #548      +/-   ##
============================================
+ Coverage     77.32%   82.56%   +5.24%     
- Complexity      475     2306    +1831     
============================================
  Files            27      156     +129     
  Lines          1654     8571    +6917     
============================================
+ Hits           1279     7077    +5798     
- Misses          375     1494    +1119     

Flag	Coverage Δ
Aws	93.37% <ø> (?)
Context/Swoole	0.00% <ø> (?)
Exporter/Instana	49.80% <ø> (ø)
Instrumentation/AwsSdk	82.14% <ø> (?)
Instrumentation/CakePHP	20.42% <ø> (?)
Instrumentation/CodeIgniter	79.31% <ø> (?)
Instrumentation/Curl	86.88% <ø> (?)
Instrumentation/Doctrine	92.82% <ø> (?)
Instrumentation/ExtAmqp	88.80% <ø> (?)
Instrumentation/Guzzle	76.25% <ø> (?)
Instrumentation/HttpAsyncClient	78.94% <ø> (?)
Instrumentation/HttpConfig	28.76% <ø> (ø)
Instrumentation/IO	0.00% <ø> (?)
Instrumentation/Laravel	76.03% <ø> (?)
Instrumentation/MongoDB	76.84% <ø> (?)
Instrumentation/MySqli	93.39% <ø> (?)
Instrumentation/OpenAIPHP	86.71% <ø> (?)
Instrumentation/PDO	85.67% <ø> (?)
Instrumentation/PostgreSql	91.36% <ø> (?)
Instrumentation/Psr14	77.41% <ø> (?)
Instrumentation/Psr15	89.74% <ø> (?)
Instrumentation/Psr16	97.43% <ø> (?)
Instrumentation/Psr18	79.41% <ø> (?)
Instrumentation/Psr3	67.70% <ø> (?)
Instrumentation/Psr6	97.56% <ø> (?)
Instrumentation/Session	94.28% <ø> (?)
Instrumentation/Slim	84.21% <ø> (?)
Logs/Monolog	100.00% <ø> (?)
Propagation/CloudTrace	90.69% <ø> (ø)
Propagation/Instana	98.07% <ø> (ø)
Propagation/ServerTiming	94.73% <ø> (ø)
Propagation/TraceResponse	94.73% <ø> (?)
ResourceDetectors/Azure	91.66% <ø> (?)
ResourceDetectors/Container	93.02% <ø> (?)
ResourceDetectors/DigitalOcean	100.00% <ø> (?)
Sampler/Xray	78.38% <ø> (?)
Shims/OpenTracing	92.99% <ø> (?)
SqlCommenter	95.58% <ø> (?)
Symfony	88.14% <ø> (?)
Utils/Test	87.79% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.
see 129 files with indirect coverage changes

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