Merge origin/main into to-plan-skill

.changeset/wayfinder-collaborative-tracker.md

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+---
+"mattpocock-skills": minor
+---
+
+Make **`wayfinder`** collaborative by moving the map off a local Markdown file and onto the repo's issue tracker.
+
+The map is now a single `wayfinder:map` issue whose tickets are its child issues — one shared URL the whole team can watch and comment on. Blocking, claiming (`wayfinder:claimed`), and the frontier query all use native tracker semantics, so a session loads the map at low resolution (Notes + one context pointer per closed ticket + Fog prose) and zooms into individual tickets on demand, instead of loading the whole map every time.
+
+Wayfinder stays tracker-agnostic: the per-tracker mechanics live behind a pointer in `docs/agents/issue-tracker.md`, so `setup-matt-pocock-skills` now seeds a "Wayfinding operations" section for GitHub, GitLab, and local-markdown. Absent that doc, Wayfinder defaults to local-markdown.

.changeset/wayfinder-map-index.md

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+---
+"mattpocock-skills": minor
+---
+
+Make **`wayfinder`**'s no-duplication contract explicit: the map is an **index**, not a store.
+
+Adopting "index" as the leading word for the map's role fixes two duplication risks. The map now states up front that a decision lives in exactly one place — its ticket — so it only ever gists and links, never restates the answer (previously this rule was implied inside an HTML comment in the map-body template). And graduating fog into a ticket now clears the graduated patch from the Fog, so a suspected question can't linger in both places at once.

.changeset/wayfinding-rename.md

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+---
+"mattpocock-skills": minor
+---
+
+Rename the **`decision-mapping`** skill to **`wayfinder`**, invoked as `/wayfinder`.
+
+"Decision map" was jargony and inaccurate — only one of the skill's four ticket types (Grilling) is actually a decision. The reframe charts a route through a foggy problem, resolving investigation tickets one at a time until the way to the goal is clear. This makes one coherent leading-word frame (fog of war / frontier / the map) instead of mixing an invented term on top of it.
+
+Also a pruning pass: unified `node`→`ticket`, bound "the frontier" to the unblocked tickets, dropped the duplicated "one question at a time" (owned by `/grilling`), and trimmed intro no-ops.