wayfinder: tighten blocking rule, update GH/GL templates

Concision pass on the blocking rule (fold the "wherever the tracker has
one" clause into the fallback sentence; drop restatements). Bring the
GitHub and GitLab issue-tracker templates up to the same standard: the
GitHub template now carries the native issue-dependencies recipe and
frontier query; the GitLab template names the native /blocked_by link
(Premium/Ultimate) with the body-convention fallback.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.changeset/wayfinder-native-blocking-rationale.md

@@ -0,0 +1,7 @@
+---
+"mattpocock-skills": patch
+---
+
+Sharpen Wayfinder's blocking rule to prefer the tracker's native dependency relationship, and update the GitHub and GitLab issue-tracker templates to match.
+
+Native blocking is essential rather than cosmetic: it renders the frontier visually in the tracker's own UI, so the human sees what's takeable at a glance without opening the map. `wayfinder`'s SKILL.md now states that preference and rationale; the GitHub template spells out the native issue-dependencies recipe (`gh api .../dependencies/blocked_by`, frontier query on `issue_dependencies_summary.blocked_by`), and the GitLab template names the native `/blocked_by` blocking link (Premium/Ultimate) with the body-convention fallback. Both keep the body fallback for trackers that lack native blocking.

skills/engineering/setup-matt-pocock-skills/issue-tracker-github.md

@@ -39,7 +39,7 @@ Used by `/wayfinder`. The **map** is a single issue with **child** issues as tic
 
 - **Map**: a single issue labelled `wayfinder:map`, holding the Notes / Decisions-so-far / Fog body. `gh issue create --label wayfinder:map`.
 - **Child ticket**: an issue linked to the map as a GitHub sub-issue (`gh api` on the sub-issues endpoint). Where sub-issues aren't enabled, add the child to a task list in the map body and put `Part of #<map>` at the top of the child body. Labels: `wayfinder:<type>` (`research`/`prototype`/`grilling`/`task`), plus `wayfinder:claimed` once claimed.
-- **Blocking**: native issue relationships where available; otherwise a `Blocked by: #<n>, #<n>` line at the top of the child body. A ticket is unblocked when every issue it lists is closed.
-- **Frontier query**: list the map's open children (`gh issue list --state open`, scoped to the map's sub-issues / task list), drop any with an open `Blocked by` issue or the `wayfinder:claimed` label; first in map order wins.
+- **Blocking**: GitHub's **native issue dependencies** — the canonical, UI-visible representation. Add an edge with `gh api --method POST repos/<owner>/<repo>/issues/<child>/dependencies/blocked_by -F issue_id=<blocker-db-id>`, where `<blocker-db-id>` is the blocker's numeric **database id** (`gh api repos/<owner>/<repo>/issues/<n> --jq .id`, _not_ the `#number` or `node_id`). GitHub reports `issue_dependencies_summary.blocked_by` (open blockers only — the live gate). Where dependencies aren't available, fall back to a `Blocked by: #<n>, #<n>` line at the top of the child body. A ticket is unblocked when every blocker is closed.
+- **Frontier query**: list the map's open children (`gh issue list --state open`, scoped to the map's sub-issues / task list), drop any with an open blocker (`issue_dependencies_summary.blocked_by > 0`, or an open issue in the `Blocked by` line) or the `wayfinder:claimed` label; first in map order wins.
 - **Claim**: `gh issue edit <n> --add-label wayfinder:claimed` — the session's first write.
 - **Resolve**: `gh issue comment <n> --body "<answer>"`, then `gh issue close <n>`, then append a context pointer (gist + link) to the map's Decisions-so-far.

skills/engineering/setup-matt-pocock-skills/issue-tracker-gitlab.md

@@ -40,7 +40,7 @@ Used by `/wayfinder`. The **map** is a single issue with **child** issues as tic
 
 - **Map**: a single issue labelled `wayfinder:map`, holding the Notes / Decisions-so-far / Fog body. `glab issue create --label wayfinder:map`. (On GitLab tiers with native epics, an epic may hold the map instead; a labelled issue works everywhere.)
 - **Child ticket**: an issue carrying `Part of #<map>` at the top of its description and labels `wayfinder:<type>` (`research`/`prototype`/`grilling`/`task`), plus `wayfinder:claimed` once claimed.
-- **Blocking**: GitLab's native `/blocked_by #<n>` quick action (or a `Blocked by: #<n>, #<n>` line in the description as fallback). A ticket is unblocked when every issue it lists is closed.
-- **Frontier query**: `glab issue list -F json` scoped to the map's children, drop any with an open blocker or the `wayfinder:claimed` label; first in map order wins.
+- **Blocking**: GitLab's **native blocking link** — the canonical, UI-visible representation. Add it with the `/blocked_by #<n>` quick action, posted as a note (`glab issue note <child> --message "/blocked_by #<blocker>"`). Native blocking links are a Premium/Ultimate feature; on the free tier (or where unavailable) fall back to a `Blocked by: #<n>, #<n>` line at the top of the description. A ticket is unblocked when every blocker is closed.
+- **Frontier query**: `glab issue list -F json` scoped to the map's children, drop any with an open blocker — a native `blocked_by` link to an open issue (`glab api projects/:id/issues/:iid/links`), or an open issue in the `Blocked by` line — or the `wayfinder:claimed` label; first in map order wins.
 - **Claim**: `glab issue update <n> --label wayfinder:claimed` — the session's first write.
 - **Resolve**: `glab issue note <n> --message "<answer>"`, then `glab issue close <n>`, then append a context pointer (gist + link) to the map's Decisions-so-far.

skills/engineering/tdd/SKILL.md

@@ -33,4 +33,4 @@ Ask: "What's the public interface, and which seams should we test?"
 
 - **Red before green.** Write the failing test first, then only enough code to pass it. Don't anticipate future tests or add speculative features.
 - **One slice at a time.** One seam, one test, one minimal implementation per cycle.
-- **Refactoring is not part of the loop.** It belongs to the review stage (see the `review` skill), not the red → green implementation cycle.
+- **Refactoring is not part of the loop.** It belongs to the review stage (see the `code-review` skill), not the red → green implementation cycle.

skills/in-progress/wayfinder/SKILL.md

@@ -52,7 +52,7 @@ Two label families:
 - `wayfinder:<type>` — one of `research`, `prototype`, `grilling`, `task` (see [Ticket Types](#ticket-types)).
 - `wayfinder:claimed` — a session sets this **first**, before any work, so concurrent sessions skip it.
 
-Blocking uses the tracker's native semantics. A ticket is **unblocked** when every ticket blocking it is closed. The **frontier** is the open, unblocked, unclaimed children — the edge of the known.
+Blocking uses the tracker's **native** dependency relationship — essential because it renders the frontier _visually_ in the tracker's own UI, so the human sees what's takeable without opening the map. Only a tracker that lacks native blocking falls back to a body convention. A ticket is **unblocked** when every ticket blocking it is closed; the **frontier** is the open, unblocked, unclaimed children — the edge of the known.
 
 The answer isn't part of the body — it's recorded on resolution (see [Work through the map](#work-through-the-map)). Assets created while resolving a ticket are linked from the issue, not pasted in.