feat: add --verbose flag to mex check

[mvanhorn]

Summary

Adds --verbose to mex check. When passed, it prints diagnostic output before the normal report: scaffold files scanned, claims extracted (broken down by kind), and per-checker summaries.

Changes

• src/cli.ts: Added --verbose option, passed through to runDriftCheck, calls reportVerbose before reportConsole
• src/drift/index.ts: runDriftCheck accepts { verbose?: boolean } options, populates verboseLog on the report with file counts, claim breakdowns, and checker summaries
• src/types.ts: Added verboseLog?: string[] to DriftReport
• src/reporter.ts: Added reportVerbose function that prints dim-styled diagnostic lines

Behavior

• mex check (default): unchanged
• mex check --verbose: prints diagnostic info, then normal report
• mex check --quiet: verbose ignored
• mex check --json: verbose ignored (verboseLog field is included in JSON output)

Fixes #5

This contribution was developed with AI assistance (Codex).

[theDakshJaitly]

Looks good — clean, well-scoped feature. Approving, but two things to address before merge:

1. --verbose --json inconsistency: PR description says verbose is ignored with --json, but verboseLog is still populated and included in the JSON output. Either gate it off when JSON mode is active, or update the description to say it's intentionally included.

2. No tests: buildVerboseLog is a pure function — easy to unit test. Would also be good to verify runDriftCheck with { verbose: true } populates verboseLog on the report.

Minor nit: per-file edges:/staleness: entries in checkerIssueCounts could get noisy on large scaffolds (2 lines per file vs 1 per aggregate checker). Worth considering whether to aggregate those too.

[mvanhorn]

Addressed both items in c81f5c5:

1. --verbose --json: verboseLog is now excluded from JSON output by default. reportJSON accepts a { verbose } option to include it explicitly.
2. Added test/verbose.test.ts covering buildVerboseLog (claim breakdown, checker counts, singular/plural, empty inputs) and reportJSON verbose gating.

89/89 tests passing.

[mvanhorn]

Both items addressed in c81f5c5:

1. --verbose --json inconsistency: reportJSON now strips verboseLog from output unless --verbose is also passed. So --json alone gives a clean report, --json --verbose includes the diagnostic log.

2. Tests: Added test/verbose.test.ts with 4 tests covering buildVerboseLog (claim breakdown, empty inputs) and the JSON gating behavior. All 89 tests pass.

On the nit about per-file checker counts getting noisy: agreed, but I'd leave that for a follow-up since it's a display preference rather than a correctness issue.

[theDakshJaitly]

Looks great, both items addressed cleanly. Approving and merging.

Also — thanks for the contribution, really appreciate you taking the time on this. Been following your 30 Days Skill repo too, the work you're doing there is incredible. Cheers Matt 🤝

[mvanhorn]

Omg thanks for using last30days!! You're first person to notice here. :)