indexion SDD (Spec-Driven Development) Bridge indexion's quantitative spec alignment tools with SDD agent workflows (cc-sdd, codex, etc.). Provides: RFC/document → SDD draft, spec↔impl drift detection, and a validation loop that feeds indexion's quantitative results into agent-driven qualitative review. When to Use - User wants to implement an RFC or specification as a library/package - User asks to verify spec-to-implementation conformance - User wants to set up a SDD project with cc-sdd + codex + indexion - User says "run the SDD loop" or "validate against the spec" - After completes, to ch…