For each issue anchor present in BASE 63279301bc non-test .py and absent on HEAD, the BASE comment/docstring block was re-attached at the HEAD location of the code it explained (matched by the distinctive code line / enclosing def). Sentences already covered by an existing HEAD comment were deduped; the issue number always survives. Insert-only: no code lines changed.
The 15 rolling micro-compaction methods (cursor resolution, exchange
serialization, one-exchange summarization, defrag, splice, DB sync, telemetry)
move verbatim into MicroCompactionMixin, mixed into ContextCompressor
(MRO: ContextCompressor -> MicroCompactionMixin -> ContextEngine). Origin
constants and call_llm are imported lazily so tests patching
agent.context_compressor.X still apply; logger name parity is kept.
