provider: fledge-alpha-free tool-call deltas missing id/name abort the turn #52975

Description

opencode/fledge-alpha-free returns OpenAI Chat tool-call deltas with no id or function.name, so the turn aborts with Error: OpenAI Chat tool call delta is missing id or name (provider.invalid-output). HTTP status is 200, so this is a malformed stream from the inference gateway, not a transport or auth failure.

The recorded chunk carries finish_reason: "tool_calls" while its delta has no tool_calls array at all:

{"id":"2352e6df92724bb9b6ea77c2651bcc39","object":"chat.completion.chunk","created":1791047735,"model":"fledge-alpha-free","choices":[{"index":0,"finish_reason":"tool_calls","logprobs":null,"delta":{"reasoning_content":null}}]}

provider.invalid-output is not retried, so a single malformed chunk ends the whole turn. 3 of 3 tool-using turns failed for me on 2026-10-03 (sessions ses_efd3c854cffe2hynyFUOGQnOdJ, ses_efd3c8aecffeugK1ak5mrV61RI), then 4 of 4 isolated retries succeeded, so it is intermittent rather than a hard capability gap.

Possibly a duplicate of #52691 and #52700; I have fresh chunk ids if they help.

Plugins

One local plugin file, ~/.config/opencode/plugins/crg-plugin.ts (code-review-graph). No other plugin entries configured.

OpenCode version

2.0.22

Steps to reproduce

1. Select model `opencode/fledge-alpha-free` (or `opencode run --auto -m 'opencode/fledge-alpha-free#max' "..."`).
2. Send a prompt that makes the model call a tool.
3. Intermittently the turn fails with "OpenAI Chat tool call delta is missing id or name". Retry — it may succeed.

Screenshot and/or share link

No share link. Offending chunk is quoted above.

Operating System

macOS, Darwin 27.0.0 arm64

Terminal

Apple Terminal, TERM=xterm-256color