arc-agentic-economy-foundationsarc-anthropic-vs-openai-comparativearc-constraints-as-leveragearc-context-architecture-evolutionarc-engineering-manager-identityarc-evaluation-frontierarc-junior-collapse-high-agencyarc-middle-management-paradoxarc-moat-migrationarc-silent-failure-taxonomyarc-speakers-numerical-fingerprintarc-spec-and-intent-bottleneckarc-trust-evidence-collapse