feat: DAWN_Exxxx error-code registry — linkable, self-documenting failures#357

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blove merged 7 commits into

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feat/error-code-registry

Jul 13, 2026

Commits on Jul 13, 2026

docs(spec+plan): error-code registry
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feat(sdk): DAWN_Exxxx error-code registry

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feat(cli): CliError carries an error code + prints the docs link

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feat: adopt error codes at the high-value failure sites (check/sandbox/permissions/model/tool-discovery)

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docs: generated /docs/errors reference + drift guard

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chore: changeset for error-code registry (patch)

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ci: build sandbox with its deps so the new @dawn-ai/sdk import resolves in the gated lanes
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