AutomateVersions

The rules to determine if the release version identifier X.Y is raised or not, are as follows:

the major number X increments whenever a backwards incompatible change is made
the minor number Y increments whenever any other change is made; it is reset to 0 when major number increments
either the major number X or the minor number Y increases at most once per release

Interface Version Matrix

This table shows all interface versions to date and the particular monotone releases which implemented them:

interface versions	0.0	0.1	0.2	1.0	1.1	2.0	2.1	2.2	3.0	3.1	4.0	4.1	4.3	5.0	6.0	7.0	8.0	9.0	10.0	11.0	12.0	12.1
monotone releases	0.17	0.18	0.19	0.20-0.23	0.24-0.25	0.26	0.27	0.28	0.29	0.30	0.31-0.33	0.34	0.35	0.36	0.37-0.38	0.39-0.40	0.41	0.42-0.43	0.44	0.45	0.46-0.47	0.48

The following table gives you an overview at which time certain functionalities have been added or altered in monotone's automation interface:

interface versions	0.0	0.1	0.2	1.0	1.1	2.0	2.1	2.2	3.0	3.1	4.0	4.1	4.3	5.0	6.0	7.0 ¹	8.0	9.0	10.0	11.0	12.0	12.1
ancestors			A
ancestry_difference		A
branches								A
cert												A
certs				A																C
children			A
common_ancestors							A
content_diff																		B
descendents		A
drop_attribute														A
drop_db_variables																A
erase_ancestors		A
file_merge																		A
genkey																			C	C
get_attributes									A					C						C
get_base_revision_id						A
get_content_changed											A
get_corresponding_path											A
get_current_revision																A
get_current_revision_id						A
get_db_variables												A				C
get_file				A
get_file_of
get_manifest_of						A
get_option										A
get_revision				A												C
get_workspace_root																	A
graph			A
heads	A
identify													A
interface_version	A
inventory				A											C	C	C
keys					A														C	C
leaves		A
lua																		A
packet_for_fdata						A
packet_for_fdelta						A
packet_for_rdata						A
packets_for_certs						A
parents			A
pull																					A
push																					A
put_file												A
put_revision												A
read_packets																		A
remote																					A
remote_stdio																					A
roots													A
select			A
show_conflicts																	A	C
set_attribute														A
set_db_variable												A				C
stdio				A						B											C
sync																					A
tags								A												C
toposort		A
update																						A

Legend

A = Addition, B = Backwards-compatible change, C = Backwards-incompatible change

Notes

¹ While the format of several command has not been changed between 0.39 and 0.40, the output of the commands (f.e. automate inventory) may differ because the interpretation of the --depth option changed in 0.40 (previously: 0 = the node + its immediate children, now: 0 = only this node)

If you like to get more information about certain command / format changes, please consult monotone's Automation documentation.