dominant language inconsistency: reports PLAINTEXT while composition table shows JAVASCRIPT 53.8% #2555

Summary

Scan of expressjs/express (141 .js files, examples/lib/test dirs) reports internally inconsistent language classification:

Observed (MACRO STATE):

• Dominant Lang: PLAINTEXT

Expected (COMPOSITION table same report):

• JAVASCRIPT: 43 files / 1167 LOC / 53.8% (highest by both file count and LOC)
• PLAINTEXT: 5 files / 1 LOC / 6.2%

The dominant-language field is computed over a different population than the scanned/composition population, producing a contradiction within a single report.

Reproduction

galaxyscope --llm-only /path/to/expressjs/express
# Scanner: examples, lib, test directories (141 .js files total)
# Expected: Dominant Lang should be JAVASCRIPT, not PLAINTEXT

Engine: GitGalaxy Scope vlatest (Delta Mode), contemporary with main 8880281.

Secondary defect: .js file over-exclusion

Same scan shows EXCLUDED ARTIFACTS section lists:

• .js: 98x "Excluded (System Exclusion, Hidden Directory, or Dynamic Ignored Dir)"

This excludes 98 of 141 .js files (69%), silently dropping most of test/ and examples/ directories. Same over-exclusion family as #2512 and #2415 (aperture/census gates).

Tertiary defect: extension string artifact

Same exclusion section logs:

• no_extension: 1x "Excluded (Unsupported Extension: '.txt"')"

Extension string carries a trailing double-quote character, suggesting a quoting artifact in extension extraction.

Labels

• bug
• core-engine
• threat: false-negative