[GH-ISSUE #2078] kt run splits string advanced.sglang_args into single-character argv entries #1268

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opened 2026-10-29 14:50:42 +00:00 by bsakaguchi · 0 comments

bsakaguchi commented

2026-10-29 14:50:42 +00:00

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Originally created by @VectorPeak on GitHub (Jul 7, 2026).
Original GitHub issue: https://github.com/kvcache-ai/ktransformers/issues/2078

## Problem

kt run appends configured advanced.sglang_args directly to the SGLang launch argv with cmd.extend(extra_args).

When users configure this value as a natural command-line string, for example:

kt config set advanced.sglang_args "--log-level warning"

_parse_value() keeps the value as a string. Since Python strings are iterable, cmd.extend(extra_args) expands it into single-character argv entries such as '-', '-', 'l', 'o', ... instead of the intended ['--log-level', 'warning'].

Impact

The configuration appears to save successfully, but the generated launch command is silently malformed. Users may only see the failure later when sglang.launch_server receives the broken argv.

Expected behavior

kt run should normalize configured SGLang args into real argv tokens, or reject unsupported config types with a clear error, before extending the launch command.

Originally created by @VectorPeak on GitHub (Jul 7, 2026). Original GitHub issue: https://github.com/kvcache-ai/ktransformers/issues/2078 ## Problem `kt run` appends configured `advanced.sglang_args` directly to the SGLang launch argv with `cmd.extend(extra_args)`. When users configure this value as a natural command-line string, for example: ```bash kt config set advanced.sglang_args "--log-level warning" ``` `_parse_value()` keeps the value as a string. Since Python strings are iterable, `cmd.extend(extra_args)` expands it into single-character argv entries such as `'-', '-', 'l', 'o', ...` instead of the intended `['--log-level', 'warning']`. ## Impact The configuration appears to save successfully, but the generated launch command is silently malformed. Users may only see the failure later when `sglang.launch_server` receives the broken argv. ## Expected behavior `kt run` should normalize configured SGLang args into real argv tokens, or reject unsupported config types with a clear error, before extending the launch command.

bsakaguchi closed this issue

2026-10-29 14:50:43 +00:00