docs(audit): reconcile Copilot SDK default-model inconsistency#18
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The Copilot SDK runner's default model is `claude-sonnet-4.6`, not `claude-haiku-4.5`. Ground truth: - src/Drederick/Agent/CopilotSdkAgentRunner.cs:18 — `internal const string DefaultModelId = "claude-sonnet-4.6";` (used at line 73 when no explicit model is provided). - src/Drederick/Agent/CopilotModelCompliance.cs:10-12 — `PreferredToolCapableModelIds` lists `claude-sonnet-4.6` first, so `SelectModel` picks it as the preferred compliant model when no explicit model is requested. Three doc spots claimed the default was `claude-haiku-4.5` and contradicted both the runner default and two other doc spots that already said `claude-sonnet-4.6`. Reconciled to match code: - docs/MODEL_BEHAVIOR.md:312 (compliance contract paragraph) - AGENTS.md:91 (Commands table for `--agent`) - AGENTS.md:117 (LLM/model guidance section) - .github/copilot-instructions.md:503 (model behavior bullet) Docs-only change. No code changes. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Follow-up to PR #17 (todo
docs-audit-2026-05-followup-model-default).Ground truth
The Copilot SDK runner's default model is
claude-sonnet-4.6, notclaude-haiku-4.5:src/Drederick/Agent/CopilotSdkAgentRunner.cs:18—internal const string DefaultModelId = "claude-sonnet-4.6";(assigned at line 73 when no explicit--model/DREDERICK_MODELis provided).src/Drederick/Agent/CopilotModelCompliance.cs:10-12—PreferredToolCapableModelIdslistsclaude-sonnet-4.6as the first entry, soSelectModelpicks it as the preferred compliant model when no explicit model is requested.What changed
Three doc spots claimed the default was
claude-haiku-4.5and contradicted both the code and two other doc spots that already saidclaude-sonnet-4.6. Reconciled all three toclaude-sonnet-4.6:docs/MODEL_BEHAVIOR.md:312(compliance contract paragraph — the line ~311 mentioned in the audit flag)AGENTS.md:91(Commands table row for--agent)AGENTS.md:117(LLM/model guidance section).github/copilot-instructions.md:503(model behavior bullet)docs/LLM_SETUP.mdanddocs/JEOPARDY.mdwere already correct.Discipline
CopilotPrices.cskeeping aclaude-haiku-4.5price entry is fine — that's a price table, not a default.