=========
To Slices
=========

Break a spec, plan, or conversation into tracer-bullet vertical slices,
each a markdown file declaring its blocking edges.

Description
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The to-slices skill decomposes work into slices — narrow but complete
vertical cuts through every layer, each demoable on its own and sized to
fit a single fresh context window. Each slice file declares the slices
that block it; a slice with no blockers can start immediately.

Wide mechanical refactors are the exception to vertical slicing and are
sequenced as expand–contract instead: expand (add the new form beside
the old), migrate (batches sized by blast radius), contract (delete the
old form).

The proposed breakdown is presented to the user — granularity, blocking
edges, merge/split — and iterated until approved before any files are
written.

Triggers
--------

.. code-block:: text

   /wf:to-slices resources/agent-docs/specs/001-feature/spec.md

Also: "slice this spec", "break this into slices".

Output
------

- One file per slice:
  ``resources/agent-docs/specs/<NNN>-<slug>/slices/<NN>-<slice-slug>.md`` with
  what-to-build, blocked-by edges, status, and acceptance criteria.
- A ``## Slices`` checkbox list added to the parent ``spec.md``, ticked
  by ``implement`` as slices land.

Attribution
-----------

Adapted from the ``to-tickets`` skill in
`mattpocock/skills <https://github.com/mattpocock/skills>`_ (MIT
license). Tracker publishing replaced with markdown slice files.