Merge remote-tracking branch 'origin/master' into codex/skill-system

# Conflicts:
#	docs/rfc/INDEX.md
#	examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl
#	examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl
#	examples/acp-agent/tests/snapshots/text-turn/session.jsonl
#	packages/README.md

tsconfig.base.json

@@ -54,6 +54,7 @@
         "./packages/timeout/*/src",
         "./packages/todo/*/src",
         "./packages/cordis/*/src",
+        "./packages/sandbox/*/src",
         "./packages/hooks/*/src",
         "./packages/session-persistence/*/src",
         "./packages/ui/*/src",