models: ♻️ Route prose to Opus and review lanes to sol

[yasyf]

Context: The owner changed model routing on October 5, 2026. Claude Opus 5.5 now writes all prose and copy, and astra writes none. Non-prose work that used to go to astra moves to gpt-6.1-sol through codex at xhigh on the standard tier: code and diff review, security review, bug diagnosis, sweeps, shell-heavy work, and second opinions. Astra and Fable are for exceptional cases only, root orchestrators run Opus, and Fable is kept for the most sensitive implementation. The general pack's model hooks still enforced the old table. prose_spawn_gate blocked an Opus subagent that wrote its own PR body or changelog, and it allowed only spawns that sent the writing to astra.

Summary: Invert the prose hooks and move the review and sweep lanes from astra to sol.

• prose_spawn_gate now blocks a prose spawn routed to codex, a codex-wrapper agent, astra, or a sonnet, haiku, or fable pin. A spawn pinned to opus, or with no pin, skips the judge entirely. That covers ship-pr and any Opus agent that writes a PR body. The codex|astra skip and the codex-wrapper exemption are gone, and a prompt that mentions codex now goes to the judge instead of skipping it.
• prose_workflow_nudge asks prose stages to pin model: 'opus' or stay unpinned. A deterministic skip leaves alone any script that has no non-Opus pin and no codex or astra mention.
• review_routing_spawn_nudge, review_routing_workflow_nudge, and implementation_spawn_nudge name gpt-6.1-sol on the standard tier where they named gpt-6-astra. Fable is never a review or diagnosis lane and is limited to the most sensitive implementation.
• DelegatedSpawn.unpinned_note reads "opus". The workflow script header and the inline-edit and browser rubrics describe an Opus root instead of a Fable main loop.

Motivation: The old gate blocked the exact work the owner now wants. If an Opus agent drafted a changelog or PR body, the gate told it to hand the writing to astra. The review nudges also pointed every finder at a model that is now reserved for exceptional cases.

Details: The inline tests follow the new rules. Blocks: sonnet, haiku, and fable pins, a codex:codex-wrapper rewrite, and an Opus orchestrator that delegates every sentence to astra. Allows: opus pins (including claude-opus-5-5), unpinned spawns, ship-pr with or without an opus pin, a codex-wrapper review that returns findings, and an Opus prompt where codex only reviews. All 106 inline cases pass, capt-hook lint is clean, and tests/test_builtin_inline.py, test_contexts.py, test_packs.py, test_review_fix.py, and test_hook_lint.py pass locally.

This PR leaves CLAUDE.md alone. cc-guides renders it from cc-skills:claude-rules, the cc-skills routing change updates that source, and the guides workflow re-renders it here.