incremental-build

Required diagnosis output

For every diagnose or explain request, the final answer must explicitly cover all of these points, even when the immediate cause is simply missing Inputs/Outputs:

• the target and exact root-cause evidence;
• the actual input/output timestamp comparison;
• missing, deleted, cleaned, or rewritten outputs;
• complete inputs, including dynamic or volatile inputs;
• evaluated input/output paths and one-to-one mapping when item lists are batched;
• two identical no-change builds and the expected second-build skip/out-of-date evidence.

Do not edit unless the user asks for a fix. If a check cannot be run, label it as an unverified check rather than omitting it or claiming success. When Inputs or Outputs are absent, report timestamp comparison or one-to-one mapping as not applicable — the incremental mechanism is not engaged, not as an unverified comparison.