chore: re-sync agent skills to upstream mattpocock/skills

Local snapshots dated 2026-09-16; upstream has moved on since. Refreshes
7 SKILL.md files (code-review, diagnosing-bugs, implement, tdd, grilling,
handoff, teach): tracker-doc references generalized, CONTEXT.md renamed
GLOSSARY.md, implement gains ticket-fetch step + Skill-tool invocation,
grilling question wording rule, handoff names the OS temp dir, teach
workspace-path resolution + quiz answer-position rules, tdd seam notes.
find-skills (vercel-labs) and prototype already current. Skill updates
take effect next session (discovery runs at startup).

agent/skills/code-review/SKILL.md

@@ -10,7 +10,7 @@ Two-axis review of the diff between `HEAD` and a fixed point the user supplies:
 
 Both axes run as **parallel sub-agents** so they don't pollute each other's context, then this skill aggregates their findings.
 
-The issue tracker should have been provided to you. If `docs/agents/issue-tracker.md` is missing, tell the user to run `/setup-matt-pocock-skills`.
+The issue tracker should have been provided to you. If not, tell the user to run `/setup-matt-pocock-skills`.
 
 ## Process
 
@@ -26,14 +26,14 @@ Before going further, confirm the fixed point resolves (`git rev-parse <fixed-po
 
 Look for the originating spec, in this order:
 
-1. Issue references in the commit messages (`#123`, `Closes #45`, GitLab `!67`, etc.), fetched via the workflow in `docs/agents/issue-tracker.md`.
+1. Issue references in the commit messages (`#123`, `Closes #45`, GitLab `!67`, etc.), fetched via the workflow in the tracker doc.
 2. A path the user passed as an argument.
 3. A spec file under `docs/`, `specs/`, or `.scratch/` matching the branch name or feature.
 4. If nothing is found, ask the user where the spec is. If they say there isn't one, the **Spec** sub-agent will skip and report "no spec available".
 
 ### 3. Identify the standards sources
 
-Anything in the repo that documents how code should be written, such as `CODING_STANDARDS.md` or `CONTRIBUTING.md`.
+Search the repo for every file that documents how code should be written. When `CODING_STANDARDS.md` or `CONTRIBUTING.md` exists, it must be on the list.
 
 On top of whatever the repo documents, the Standards axis always carries the **smell baseline** below: a fixed set of Fowler code smells (_Refactoring_, ch.3) that applies even when a repo documents nothing. Two rules bind it:
 
@@ -57,6 +57,8 @@ Each smell reads *what it is* → *how to fix*; match it against the diff:
 
 ### 4. Spawn both sub-agents in parallel
 
+Issue both sub-agent calls together, in the foreground, and aggregate the reports they return.
+
 **Standards sub-agent prompt** should include:
 
 - The full diff command and commit list.