GeezerVison

Summary

• Record the top-level names returned by the existing CPython module scanner, the discovered names deliberately ignored, and names passed to its error callback.
• Report explicit truncation when a name is not an exact string or the bounded manifest cannot retain all observations. Existing comparison fields are retained.
• Keep focused reporting-tool tests together in scripts/tests/test_whatsleft.py. Per review, this PR adds no CI test step.

The manifest covers only names returned by the existing top-level scanner. It does not prove that every installable module was discovered, and it does not by itself distinguish every successful reference import from a failed one. It is coverage evidence for future checks, not an enabled signature gate or a claim of signature parity. The implementation performs no extra module imports or attribute lookups, but recording evidence necessarily adds ordinary allocations and references.

Validation

• Five CPython 3.15 reporting-tool tests pass, including scanner errors, ignored and failed names, evaluation order, bounded output, and a hostile string subclass.
• A CPython 3.15 self-scan reported 292 selected scanner names, 5 deliberately ignored names, no scanner errors and no truncation. All prior JSON fields matched a same-environment main control.
• Review follow-through preserves all five test bodies and 12 assertions byte-for-byte while renaming the module, and removes only this PR’s three-line discovery test CI step. Existing scanner and cron behavior are unchanged.
• Baseline, canonical-file, and wildcard CPython unittest discovery pass. Independent review, Ruff formatting/import checks, YAML parsing, diff checks, and normal repository hooks pass. Local zizmor/actionlint were unavailable, so hosted workflow validation remains pending.
• RustPython was not executed locally. This change adds no CI gate or signature-parity claim.

This change overlaps reporter integration lines in #9565 and #9628 and will require careful composition if those land first.

Assisted-by: dot:frontier-intelligence