Readiness Scorecard

This chapter ties GERC readiness to the current hardening ladder instead of general optimism.

Overall Posture

GERC should currently be read as:

• strong on source-only lowering fundamentals
• strong on deterministic emission and emitted-crate generation
• strong on conservative rejection of unsupported shapes
• useful and increasingly hardened on evidence-aware large surfaces
• still dependent on host availability for the biggest OpenSSL and Linux-system evidence ladders

For Level 1 production, that posture should be read as Linux/ELF-first and canonical-corpus-backed, with Apple and Windows serving as confidence-raising secondary targets.

That is a good release posture for a young lowering crate, but it is not yet a claim that every ugly native surface will lower cleanly.

Subsystem Scorecard

• source-first intake: high
• gate and refusal diagnostics: high
• lowering and typemapping: high
• deterministic source emission: high
• emitted crate output: high
• raw rustc argument rendering: high
• source-only large-surface confidence: high
• evidence-aware large-surface confidence: medium-high
• conservative rejection on difficult layouts: high

Canonical Readiness Anchors

The release posture should be judged against these anchors first:

• source-only sqlite3
• source-only zlib
• source-only libpng
• emitted crate output from deterministic fixtures
• source-only pointer-only opaque-handle lowering
• evidence-aware framework link rendering
• packed union acceptance with explicit representation evidence
• OpenSSL link directives
• libxml2 link directives
• Windows system-library link directives
• combined Linux event-loop link directives

If those anchors drift, the scorecard should drop even if the smaller unit tests still look healthy.

For the Level 1 production claim, the hermetic subset of those anchors is the minimum production floor. The host-dependent anchors are confidence raises, not the only basis for trust.