Detect Gemini functionCall and Claude tool_use, backfill tool_call IDs, and broaden tool-sieve detection

[CJackHwang]

Motivation

• Improve detection and parsing of additional tool-call syntaxes emitted by different models (Gemini functionCall, Claude tool_use, and variants).
• Ensure tool-result messages can be associated with their originating tool call by backfilling or generating stable tool_call_id values.
• Make the streaming tool-sieve more robust to different keyword spellings and payload shapes so tool calls are not missed.

Description

• Add a lightweight tool-call state in internal/adapter/claude with tool_call_state.go and helper utilities in handler_helpers_misc.go to generate and track call_claude_* IDs and safely extract string values.
• Update internal/adapter/claude/handler_utils.go to thread the state through normalizeClaude* functions so assistant tool_use blocks get assigned IDs and subsequent tool_result blocks can reuse inferred IDs or names.
• Extend Gemini conversion in internal/adapter/gemini/convert_messages.go to generate call_gemini_* IDs and backfill function response callId from the last call seen by name.
• Broaden tool-call detection keywords in the streaming tool-sieve and parsing layers by adding `

---

Codex Task

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
ds2api	Ready	Preview, Comment	Mar 31, 2026 5:51pm

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: bfca84c2c7

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".