Deterministic instruction builder for the Instruction Compiler.
Uses shadow mode (COMPACT_SHADOW profile) to avoid duplicating
BULLETS/NEVER/CRITICAL that the CLAUDE.md / dedicated rule file carries.
Deterministic STATIC Claude Code instructions for the char-budget test: the
cold first-contact handshake surface (skeleton + shell hint + decoder +
CLAUDE.md pointer + guidance). It pins minimal=true (the dynamic
session/knowledge/gotcha payload is governed by INSTRUCTION_CAP_TOKENS, not
the char budget) plus level=Off, shadow=false (the default template) and
an empty persona block (the coding default), so the result is independent
of the developer’s local lean-ctx config and the assertion stays
deterministic (#498) for every contributor, not just clean CI.