yoi/.yoi/tickets/closed/20260608-103842-remove-legacy-ticket-schema-fields/resolution.md

Implemented and merged.

Summary:

• Removed legacy_ticket from the current Ticket schema, metadata, summary, tool input/output, and CLI show/list/create surfaces.
• Removed needs_preflight from current schema/API/panel/tool output surfaces.
• Removed legacy workflow_state: intake compatibility; parser/tests now reject intake instead of normalizing it to planning.
• Migrated local .yoi/tickets/**/item.md frontmatter to remove obsolete legacy_ticket entries, including non-null values explicitly authorized as obsolete migration breadcrumbs.
• Preserved historical thread/resolution prose as audit history where it is not current schema/API input.

Implementation:

• Coder commit: 934a4b5 ticket: remove legacy schema fields
• Merge commit: de8e973 merge: remove legacy ticket schema fields
• Reviewer approved with no blocking findings.

Validation:

• cargo fmt --check
• git diff --check
• cargo run -q -p yoi -- ticket doctor
• cargo check --workspace
• nix build .#yoi