nx_builder_authors_claude_meter.nx

nx_builder_authors_claude_meter.nx -- the BUILDER authors the S6 CLAUDE-USE METER (operator: "get our measured use of claude to the minimal we can till we have our own llm"). The meter reads DURABLE sources only (tutoring docs, [LLM] roadmap rungs, the synthesis corpus) and appends an epoch-stamped METER line to knowledge/status/claude_meter.log -- the PM reads a TREND, the Examiner grades it, a rising open-rung count is a flagged regression. license_tier: ORIGINAL