generate-locales.mjs: an invalid --lang is only rejected after every API call has been paid for; help text names the wrong default model; no request timeout #246

Severity: low

Where: generate-locales.mjs (parseArgs only checks --lang is non-empty; langShape is tested per key inside the apply loop after all batches ran; model: process.env.OPENAI_MODEL || 'gpt-5-mini' while the help text says "default: OPENAI_MODEL or gpt-4o-mini"; callOpenAI has no timeout)

What happens

node generate-locales.mjs --lang french (or any shape langShape rejects) runs every batch against the API, then prints "Updated combined-locales.json with 0 'french' translations" and rewrites the file (reformatting it) with no change.

Suggested fix

Test langShape in parseArgs and exit 1 with the expected shape; fix the help text; add req.setTimeout.

Confidence: high.

From a line-by-line code review of the tree at 41363fd (2026-10-02). Each claim above was checked against the source before filing; the reproduction steps and line references are as of that commit.

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