Add verify/check mode documentation and list-skills script

.out-of-scope/setup-skill-verify-mode.md

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+# Verify/Check Mode for `setup-matt-pocock-skills`
+
+This project will not add a dedicated verify/check mode (or a separate verify skill) for `setup-matt-pocock-skills`.
+
+## Why this is out of scope
+
+A second skill — or a `--verify` flag — for checking whether `docs/agents/*.md` artifacts still match the seed-template schema would duplicate work the existing setup skill already handles in conversation.
+
+The intended workflow is: **run `/setup-matt-pocock-skills` and tell it to verify your current setup.** The skill is prompt-driven, so the maintainer can scope it to a verification pass ("don't rewrite anything, just check my existing files against the current seed templates and report drift") without needing a separate code path. Adding a flag or a sibling skill would split the surface area of a feature that's already expressible through the natural-language entry point.
+
+Keeping configuration management to a single skill also avoids the maintenance cost of two skills drifting from each other when seed templates evolve.
+
+## Prior requests
+
+- #106 — Feature request: verify/check mode for setup-matt-pocock-skills

scripts/list-skills.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO="$(cd "$(dirname "$0")/.." && pwd)"
+
+cd "$REPO"
+find . -name SKILL.md -not -path '*/node_modules/*' | sed 's|^\./||' | sort