Enhance propose-spec: docs-only scope, architecture prompt, update detection

Update README workflow diagrams to match current plugin state

Improve propose-spec skill: broader trigger, remove implementation steps

Update installation instructions to use GitHub source

Remove duplicate hooks field from plugin.json

Enter plan mode instead of printing full cycle plan in propose-* skills

Bump version to 1.7.1

Broaden propose-architecture trigger to all design decisions

Replace /plan suggestion with full cycle plan in propose-spec and propose-architecture

Add /plan suggestion after recording in propose-spec and propose-architecture

Bump version to 1.7.0

Add /audit-history retroactive documentation procedure to techlead-workflow

Extend propose-architecture to intercept pre-implementation architecture changes

Add skill routing behavioral evals for techlead-workflow

Update eval results with new behavioral evals for 5 skills