codex-rescue agent references stale gpt-5-4-prompting skill; effort hint omits max/ultra (default model is now gpt-5.6-sol)

Summary

Since the GPT-5.6 rollout, codex login + a cache refresh makes gpt-5.6-sol the default Codex model (family: Sol/Terra/Luna). But the codex-rescue subagent — the only place in the plugin that reshapes a user request into a Codex-bound prompt — still points at a gpt-5-4-prompting skill. GPT-5.6's official guidance is materially different from the 5.4 era (leaner, outcome-first contracts; 5.6 is more concise by default), so prompts get shaped in the wrong direction for the model that actually runs them.

Ref: https://developers.openai.com/api/docs/guides/prompt-guidance-gpt-5p6

Where (plugin v1.0.5)

1. Stale prompting skill (primary)

agents/codex-rescue.md:

• frontmatter: skills: [codex-cli-runtime, gpt-5-4-prompting]
• body: "You may use the gpt-5-4-prompting skill only to tighten the user's request into a better Codex prompt before forwarding it."

skills/ ships only gpt-5-4-prompting — there is no gpt-5-6/gpt-5-5 variant.

2. Effort hint omits current tiers (secondary, cosmetic)

commands/rescue.md (arg hint):
--effort <none|minimal|low|medium|high|xhigh>
The GPT-5.6 API supports max, and the Codex CLI exposes ultra for Sol/Terra — neither is discoverable from the hint.

Impact

Every /codex:rescue that uses the agent's prompt-tightening step optimizes the forwarded prompt against 5.4-era guidance while gpt-5.6-sol executes it. Silent quality regression, not an error.

Suggested fix

• Add a gpt-5-6-prompting skill (or rename/update the existing one) reflecting the official 5.6 guidance, and update the skills: list + body reference in agents/codex-rescue.md.
• If a single skill should cover multiple generations, make its scope explicit (e.g. codex-prompting) so it doesn't pin to one model version.
• Update the --effort hint in commands/rescue.md to include max (and note ultra for Sol/Terra where applicable).

Environment

• Plugin codex v1.0.5 (openai/codex-plugin-cc)
• Codex CLI 0.144.1
• Default model gpt-5.6-sol, effort high

Start with agents/codex-rescue.md and skills/gpt-5-4-prompting, then compare their scope with the linked GPT-5.6 prompt guidance. Inspect commands/rescue.md for the effort argument hint. Done means the rescue agent no longer references stale 5.4 guidance and the hint reflects max and the applicable ultra tier.