The spec settles what was decided; the plan breaks it into 9 tasks
with the code each one needs.
Task order is the dependency order: the service learns to write a
negative quantity, a pure resolver learns to map a pasted line to a
stock item, a bulk service learns to apply and mirror, and only then
does the MCP tool, the agent prompt, the approval card, the composer
shortcut and the till tile hang off it.
Two corrections to the spec while writing the plan: the approval card
receives dotted MCP names, not model-facing ones, and the description
match takes the top candidate unless two are tied at the top - a bare
threshold would report 'ambiguous' for almost every description and
defeat the feature.
