Contract key errors: validate

Codes that start with seampact/validate/ say a key or a value is not allowed. The message gives the fix, often the list of keys you may write.

Code	Cause and fix
seampact/validate/unknown-keyword	The key is not allowed at that place. Remove it, or fix its spelling: the message may say Did you mean .... A key written one level too far left becomes a setting of the node above: check the indent.
seampact/validate/missing-keyword	A required key is absent. Add the key the message names.
seampact/validate/wrong-type	The value has the wrong type, for example a list where a mapping goes. Write the type the message names.
seampact/validate/invalid-value	The value is not allowed. Write one of the values the message lists, or a number in the range it gives.
seampact/validate/invalid-name	Schema names start with an uppercase letter (Note), other names with a lowercase one (notes); then letters, digits or _.
seampact/validate/reason-required	A safety exception needs a reason: access: { public: "Anyone may call this api." }.
seampact/validate/conflicting-keywords	Two keys exclude each other. Keep one.

See the grammar for every key.