chore: add local path leak pre-commit guard

.githooks/pre-commit

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+set -eu
+
+scripts/check-local-path-leaks.sh --cached

AGENTS.md

@@ -3,6 +3,8 @@
 ## Project Structure & Module Organization
 `cmd/silo` contains the main server entrypoint. Backend code lives in `internal/`, organized by domain (`api`, `catalog`, `metadata`, `playback`, `scanner`, `jellycompat`, etc.); keep new code in the package that owns the behavior instead of creating catch-all helpers. Database changes belong in `migrations/` as paired numbered `.up.sql` and `.down.sql` files. The React frontend lives in `web/src/`, with feature code split across `components/`, `pages/`, `hooks/`, `player/`, and `lib/`. Reference material belongs in `docs/architecture/` or `docs/superpowers/{specs,plans}/`; ad hoc SQL helpers live in `scripts/`.
 
+When creating or editing `docs/superpowers/specs/` or `docs/superpowers/plans/`, never include local absolute filesystem paths or transient worktree IDs. Use repository-relative paths and wording like "Commands assume the repository root is the cwd."
+
 This repository is a VERY EARLY WIP. Proposing sweeping changes that improve long-term maintainability is encouraged.
 
 

Makefile

@@ -1,4 +1,4 @@
-.PHONY: frontend build dev-frontend dev-backend dev-proxy dev-transcode lint clean jellyfin-web-bundle migrate-continuum-check
+.PHONY: frontend build dev-frontend dev-backend dev-proxy dev-transcode lint clean jellyfin-web-bundle migrate-continuum-check verify-local-paths install-hooks
 
 GIT_COMMON_DIR := $(strip $(shell git rev-parse --git-common-dir 2>/dev/null))
 MAIN_CHECKOUT_ROOT := $(if $(GIT_COMMON_DIR),$(abspath $(GIT_COMMON_DIR)/..))
@@ -43,6 +43,14 @@ lint:
 	golangci-lint run
 	cd web && pnpm run lint
 
+# Check committed content for local machine path leaks.
+verify-local-paths:
+	scripts/check-local-path-leaks.sh
+
+# Install repo-local git hooks for this checkout/worktree.
+install-hooks:
+	git config core.hooksPath .githooks
+
 # Fetch and build the pinned Jellyfin Web bundle
 jellyfin-web-bundle:
 	JELLYFIN_WEB_OUTPUT_DIR=$(JELLYFIN_WEB_OUTPUT_DIR) scripts/fetch-jellyfin-web.sh

scripts/check-local-path-leaks.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+usage() {
+	printf 'usage: %s [--cached]\n' "${0##*/}" >&2
+}
+
+cached=0
+case "${1:-}" in
+	"")
+		;;
+	--cached)
+		cached=1
+		;;
+	-h|--help)
+		usage
+		exit 0
+		;;
+	*)
+		usage
+		exit 2
+		;;
+esac
+
+repo_root=$(git rev-parse --show-toplevel)
+cd "$repo_root"
+
+failed=0
+t3_worktree_dir='\.t3'/'worktrees'
+t3_worktree_id_prefix='t3''code-'
+
+check_pattern() {
+	local label=$1
+	local pattern=$2
+	shift 2
+
+	local matches
+	if [[ "$cached" -eq 1 ]]; then
+		matches=$(git grep --cached -n -I -E "$pattern" -- "$@" 2>/dev/null) || return 0
+	else
+		matches=$(git grep -n -I -E "$pattern" -- "$@" 2>/dev/null) || return 0
+	fi
+
+	if [[ -n "$matches" ]]; then
+		printf '%s\n' "local path leak check failed: $label" >&2
+		printf '%s\n\n' "$matches" >&2
+		failed=1
+	fi
+}
+
+check_pattern \
+	"T3 worktree path or generated worktree id" \
+	"(${t3_worktree_dir}|/Users/[^[:space:]]*/${t3_worktree_dir}/|${t3_worktree_id_prefix}[0-9a-f]{8})" \
+	.
+
+check_pattern \
+	"absolute /Users path in generated superpowers docs" \
+	'/Users/[^[:space:]]+' \
+	docs/superpowers/specs docs/superpowers/plans
+
+if [[ "$failed" -ne 0 ]]; then
+	printf '%s\n' "Remove local machine paths from committed content. Use repository-relative paths instead." >&2
+	exit 1
+fi