fix(kickoff): stop --force-reinitting hook-config.json on every worktree + container start

crosslink/resources/container/entrypoint.sh

@@ -125,10 +125,15 @@ fi
 
 # --- Crosslink init ---
 # Set up hooks, skills, and policy in the workspace so container agents are
-# bound by the same rules as host agents.
+# bound by the same rules as host agents. Plain `init` (no --force) is
+# idempotent: it short-circuits when `.crosslink/` and `.claude/` already
+# exist in the worktree (the common case, since both are git-committed and
+# arrive with the worktree checkout). This is what prevents the entrypoint
+# from re-templating `hook-config.json` on every container start and leaking
+# spurious diffs into agent PRs. See GH#583.
 if [ -n "$WORKSPACE" ] && command -v crosslink &>/dev/null; then
     echo "[crosslink-entrypoint] Initializing crosslink hooks in workspace..."
-    gosu agent bash -c "cd '$WORKSPACE' && crosslink init --force" 2>&1 || true
+    gosu agent bash -c "cd '$WORKSPACE' && crosslink init" 2>&1 || true
 fi
 
 echo "[crosslink-entrypoint] Setup complete. Running command as agent..."

crosslink/src/commands/kickoff/launch.rs

@@ -433,10 +433,17 @@ pub(super) fn init_worktree_agent(
     crosslink_dir: &Path,
     compact_name: &str,
 ) -> Result<String> {
-    // Run crosslink init --force in the worktree
+    // Run `crosslink init` in the worktree. Plain init (no --force) is
+    // idempotent: it short-circuits when `.crosslink/` and `.claude/` already
+    // exist, which is the common case for a worktree freshly checked out
+    // from a branch that has both committed. We keep `--skip-signing` and
+    // `--defaults` to suppress the TUI walkthrough on the rare path where
+    // init actually has work to do. Dropping `--force` here prevents the
+    // worktree's `hook-config.json` from being re-templated and leaking a
+    // spurious diff into every agent-produced PR. See GH#583.
     let output = Command::new("crosslink")
         .current_dir(worktree_dir)
-        .args(["init", "--force", "--skip-signing", "--defaults"])
+        .args(["init", "--skip-signing", "--defaults"])
         .output()
         .context("Failed to run crosslink init in worktree")?;