fix(install): resolve git hooks dir via git plumbing, drop stale manifest fields

scripts/install.sh hardcoded $REPO_ROOT/.git/hooks, which breaks under any
git worktree checkout (.git is a file there, not a directory) — this is
what blocks every worktree-based agent from pushing cleanly. Resolve the
hooks directory via `git rev-parse --git-path hooks` instead, normalizing
to an absolute path since git returns it relative to the queried repo root
for plain checkouts but absolute for worktrees.

Also drops `agents`/`skills` fields from plugins/bin, plugins/core, and
plugins/gitea plugin.json where the referenced directories don't exist on
main yet (bin never had an agents/ dir; core and gitea's real skill/agent
content is still pending merge from an in-flight branch) — these were
failing scripts/check-manifests.sh and blocking pushes for unrelated work.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FNJWdVvdgvZCHi1hZGqgVQ

plugins/bin/plugin.json

@@ -1,5 +1,4 @@
 {
-  "agents": "agents/",
   "author": {
     "email": "defame1297@rkdr.net",
     "name": "Defame1297"

plugins/core/plugin.json

@@ -1,5 +1,4 @@
 {
-  "agents": "agents/",
   "author": {
     "email": "defame1297@rkdr.net",
     "name": "Defame1297"
@@ -16,8 +15,5 @@
   "license": "MIT",
   "mcpServers": ".mcp.json",
   "name": "core",
-  "skills": [
-    "skills/"
-  ],
   "version": "1.0.0"
 }

plugins/gitea/plugin.json

@@ -1,5 +1,4 @@
 {
-  "agents": "agents/",
   "author": {
     "email": "defame1297@rkdr.net",
     "name": "Defame1297"
@@ -16,8 +15,5 @@
   "license": "MIT",
   "mcpServers": ".mcp.json",
   "name": "gitea",
-  "skills": [
-    "skills/"
-  ],
   "version": "1.0.0"
 }

scripts/install.sh

@@ -30,10 +30,16 @@ done
 # Install git hooks into the current repo checkout
 HOOKS_SRC="$REPO_ROOT/scripts/git-hooks"
 if [[ -d "$HOOKS_SRC" ]]; then
+  # Unset inherited GIT_DIR/GIT_WORK_TREE — set by git when this script runs as
+  # a hook (e.g. pre-push), they override -C's directory-based discovery and
+  # would resolve against the invoking repo instead of $REPO_ROOT.
+  GIT_HOOKS_DIR="$(env -u GIT_DIR -u GIT_WORK_TREE git -C "$REPO_ROOT" rev-parse --git-path hooks)"
+  [[ "$GIT_HOOKS_DIR" = /* ]] || GIT_HOOKS_DIR="$REPO_ROOT/$GIT_HOOKS_DIR"
+  mkdir -p "$GIT_HOOKS_DIR"
   for hook_file in "$HOOKS_SRC"/*; do
     [[ -f "$hook_file" ]] || continue
     hook_name="$(basename "$hook_file")"
-    dest_hook="$REPO_ROOT/.git/hooks/$hook_name"
+    dest_hook="$GIT_HOOKS_DIR/$hook_name"
     cp "$hook_file" "$dest_hook"
     chmod +x "$dest_hook"
   done

tests/test-git-hooks-install.sh

@@ -22,7 +22,7 @@ TEMP_HOME="$(mktemp -d)"
 trap 'rm -rf "$TEMP_REPO" "$TEMP_HOME"' EXIT
 
 mkdir -p "$TEMP_REPO/scripts"
-mkdir -p "$TEMP_REPO/.git/hooks"
+git -C "$TEMP_REPO" init -q
 
 # Minimal deploy-manifest.sh — empty deploy lists so install.sh reaches the
 # hook-copy block without attempting to copy files that don't exist in the
@@ -90,6 +90,28 @@ else
 fi
 rmdir "$HOOKS_SRC/not-a-hook"
 
+# ---------------------------------------------------------------------------
+echo ""
+echo "--- hook install: resolves correctly when GIT_DIR is inherited (hook context) ---"
+# ---------------------------------------------------------------------------
+
+# Git sets GIT_DIR/GIT_WORK_TREE for child processes when this script itself
+# runs as a hook (e.g. pre-push). Simulate that and confirm install.sh still
+# resolves hooks against $TEMP_REPO, not the inherited GIT_DIR.
+OTHER_REPO="$(mktemp -d)"
+git -C "$OTHER_REPO" init -q
+if HOME="$TEMP_HOME" GIT_DIR="$OTHER_REPO/.git" GIT_WORK_TREE="$OTHER_REPO" \
+    bash "$TEMP_REPO/scripts/install.sh" > /dev/null 2>&1; then
+  if [[ -f "$TEMP_REPO/.git/hooks/post-push" ]]; then
+    pass "resolves \$TEMP_REPO/.git/hooks/ even with inherited GIT_DIR"
+  else
+    fail "installed into inherited GIT_DIR instead of \$TEMP_REPO"
+  fi
+else
+  fail "install.sh failed when GIT_DIR/GIT_WORK_TREE were inherited"
+fi
+rm -rf "$OTHER_REPO"
+
 # ---------------------------------------------------------------------------
 echo ""
 echo "--- hook install: idempotent ---"