TODO and roadmap
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Purpose
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This page tracks unfinished work, technical debt, future experiments, refactoring ideas,
and implementation notes that must remain visible to current and future developers.

Recommended content
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* fixes still pending;
* protocol experiments;
* timing investigations;
* hardware-specific issues;
* refactoring targets;
* migration steps for future versions.

Maintenance rule
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Entries should describe both:

* the current limitation;
* the intended future direction.

This helps the page act not merely as a task dump, but as a development roadmap.