Introduce multiple v1 improvements: add new decision and constraint records (DEC-0006/7/8, CON-0001/2) and a v1-improvements plan; update README with new commands and formats. CLI enhancements: add search command, show/update subcommands and filtering for plans/decisions/constraints, export --watch and new targets (windsurf, html, json), and bump CLI version. Core updates: include constraints in context and scoring, persist agent session to .intent/.agent-session.json (prepare/review flow), expose watchExport and HTML/JSON export targets, and bump core version. Misc: .intent/.gitignore updated to ignore session file.