v0.12.215 — recover GPT-5.4 plain-text tool calls (#193)

v0.12.215 — June 30, 2026

Recover tool calls that GPT 5.4 emits as plain JSON / function-call-looking text instead of structured tool_calls (#193, thanks @0xCheetah1).

GPT-5.4 plain-text tool calls now become real tool calls

• Symptom: through the OpenAI-compatible path, GPT 5.4 sometimes emits a tool call as assistant text instead of structured tool_calls — e.g. {"type":"function","name":"terminal","parameters":{"cmd":"ls -alh /home/Blockrun"}}, {"name":"session_search","parameters":{…}}, read_file(parameters={"path":"…"}), or a terminal\nCOMMAND\n[/terminal] block. Downstream chat surfaces (seen in Chermes/Telegram) then displayed the raw text to the user instead of dispatching the tool — the same class of failure as the Gemini #189/#190 fix, but with GPT-specific shapes.
• Fix: added a fourth recognizer to src/textual-tool-calls.ts (which already synthesizes structured calls from OpenClaw <tool_call>, Anthropic <function_calls>, and Gemini [Called function …] text shapes). The GPT extractor recovers: whole-content {"name":…,"parameters":…}, whole-content {"type":"function",…} (incl. pretty-printed), whole-content NAME(parameters={…}), a trailing JSON object after prose only when "type":"function" is explicit, and the terminal\n…\n[/terminal] block. Guardrails: prose JSON examples only fire when the whole content is a call; an incomplete terminal block or a non-function type (e.g. a JSON schema "type":"object") is rejected; the terminal cmd arg is mirrored to command (preserving cmd) for OpenClaw's terminal tool. It runs only when the tag-based extractors find nothing, so it can't interfere with tagged content. Both call sites — streaming and non-streaming in proxy.ts — share this function.
• Tests: 14 new cases in src/textual-tool-calls.test.ts (all five shapes plus no-mis-fire on prose examples, missing parameters, incomplete terminal block, non-function type, and cmd→command normalization). Full suite 645 passed, lint + typecheck + prettier + build clean.