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OmniRoute/tests/unit
NomenAK 7e7faad079 fix(claude): sanitize tool schemas + cloak third-party tool names on native Claude OAuth
Native Claude OAuth (claude->claude passthrough) forwards client tool
definitions verbatim. Anthropic's first-party Messages API then rejects:
  - invalid tool input_schemas (deep-truncation placeholders such as
    `enum: "[MaxDepth]"`, or index-keyed objects where arrays are required), and
  - tool names it fingerprints as a third-party agent harness (specific
    blacklisted names like `mixture_of_agents`, or a large enough set of
    recognizable snake_case agent tool names),
both surfaced as a misleading `400 You're out of extra usage` placeholder
(the SSE stream is refused — not a real billing event). The same request
succeeds on translator-backed providers (OpenAI/Codex), which already sanitize
and re-shape tool payloads — so the gap is specific to the native passthrough.

Adds the missing guards on the native Claude OAuth path (executors/base.ts):
  - sanitizeClaudeToolSchemas(): coerce/drop invalid draft-2020-12 constructs
    (non-array enum/required/anyOf/..., placeholder schema slots -> {}).
  - cloakThirdPartyToolNames(): deterministically alias non-Claude-Code tool
    names (Claude Code canonical mapping where one exists, else PascalCase),
    tracked in the existing per-request _toolNameMap so remapToolNamesInResponse
    restores the caller's original names. Opt out via
    CLAUDE_DISABLE_TOOL_NAME_CLOAK=true.

Genuine Claude Code tool names (PascalCase) and already-valid schemas are
left untouched, so existing first-party traffic is unaffected.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-05-30 12:56:35 +00:00
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