Executes the `unify-to-tickets` decision (personal-wiki #23), reworking
this PR from "add /to-plan" into the full planning-skills unification.
- Rename /to-prd → /to-spec. "spec" is now the single through-line term
(the skill still opens with "you may know this document as a PRD" for
discoverability).
- Merge /to-plan + /to-issues into one /to-tickets skill; delete
/to-issues. /to-tickets emits a set of tickets, each declaring its
blocking edges — one medium-agnostic artifact that reads as a
sequential plan (local `tickets.md`, edges as text) or a parallelizable
DAG (real tracker, native blocking links). The edges live in the ticket
either way; the medium only decides whether anything acts on them in
parallel.
- ask-matt now routes idea → /to-spec → /to-tickets → /implement.
- Sweep every cross-reference (docs pages, chain diagrams, CONTEXT.md,
ADRs, .agents, setup templates) to the new names and vocabulary.
- Rewrite the changeset to describe the unification.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
