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Route Copilot's fast tier to gpt-5.6-luna and unpin capable - #332

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scgopi merged 1 commit into
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copilot-fast-luna
Sep 9, 2026
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Route Copilot's fast tier to gpt-5.6-luna and unpin capable#332
scgopi merged 1 commit into
mainfrom
copilot-fast-luna

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@scgopi scgopi commented Sep 9, 2026

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Summary

  • Copilot's fast tier now passes --model gpt-5.6-luna (loop sessions pinned fast or auto-routed fast, the summary beat rewrite, and the pass board composer).
  • Copilot's capable tier passes no --model flag, like standard, so Copilot's own default applies.
  • Claude Code, Codex and OpenCode mappings are unchanged.

Why

Copilot CLI 1.0.84's accepted id list (copilot help config) no longer contains claude-opus-4.6, so a Copilot loop pinned to capable, or a turn-based loop with model auto-select on, launched with an id Copilot rejects. The ids were read off 0.0.410 and the list turns over faster than a release cycle.

Test plan

  • CopilotBackendTests and SummaryStoreTests updated to the new ids and passing (27 tests, exit 0) in a private-DerivedData worktree build
  • swiftlint 0 errors, swift format lint clean on the changed files

🤖 Generated with Claude Code

https://claude.ai/code/session_01MK7LqRQyrEoJzFoVRCiNSW

Copilot's --model list turns over faster than a release cycle: the
capable tier's claude-opus-4.6 is already absent from 1.0.84, so a
capable-pinned loop failed to launch. Fast now names gpt-5.6-luna, and
capable joins standard in passing no flag so Copilot's own default
applies.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MK7LqRQyrEoJzFoVRCiNSW
@scgopi
scgopi merged commit 5ee17d1 into main Sep 9, 2026
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