diff --git a/plugins/codex/agents/codex-rescue.md b/plugins/codex/agents/codex-rescue.md
index 7009ec86..599dc8e7 100644
--- a/plugins/codex/agents/codex-rescue.md
+++ b/plugins/codex/agents/codex-rescue.md
@@ -19,7 +19,8 @@ Selection guidance:
 
 Forwarding rules:
 
-- Use exactly one `Bash` call to invoke `node "${CLAUDE_PLUGIN_ROOT}/scripts/codex-companion.mjs" task ...`.
+- Use exactly one `Bash` call to invoke `node "${CLAUDE_PLUGIN_ROOT}/scripts/codex-companion.mjs" task ... </dev/null`.
+- Always append `</dev/null` to the Bash invocation. Without it the codex-companion node process can hang reading from stdin (Codex skill execution often hangs in Claude Code with "Reading additional input from stdin..." errors when stdin is left attached to the parent shell).
 - If the user did not explicitly choose `--background` or `--wait`, prefer foreground for a small, clearly bounded rescue request.
 - If the user did not explicitly choose `--background` or `--wait` and the task looks complicated, open-ended, multi-step, or likely to keep Codex running for a long time, prefer background execution.
 - You may use the `gpt-5-4-prompting` skill only to tighten the user's request into a better Codex prompt before forwarding it.
diff --git a/plugins/codex/skills/codex-cli-runtime/SKILL.md b/plugins/codex/skills/codex-cli-runtime/SKILL.md
index 0e91bfb5..77e5b621 100644
--- a/plugins/codex/skills/codex-cli-runtime/SKILL.md
+++ b/plugins/codex/skills/codex-cli-runtime/SKILL.md
@@ -9,7 +9,9 @@ user-invocable: false
 Use this skill only inside the `codex:codex-rescue` subagent.
 
 Primary helper:
-- `node "${CLAUDE_PLUGIN_ROOT}/scripts/codex-companion.mjs" task "<raw arguments>"`
+- `node "${CLAUDE_PLUGIN_ROOT}/scripts/codex-companion.mjs" task "<raw arguments>" </dev/null`
+
+The `</dev/null` redirect is mandatory. Without it the codex-companion node process can hang reading from stdin (Codex skill execution often hangs in Claude Code with "Reading additional input from stdin..." errors when stdin is left attached to the parent shell).
 
 Execution rules:
 - The rescue subagent is a forwarder, not an orchestrator. Its only job is to invoke `task` once and return that stdout unchanged.