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fix: models-dev user agent is evaluated at module load, leaking host OPENCODE_CLIENT into requests #47512
Description
Description
The models-dev catalog fetcher builds its User-Agent once at module load. Hosts that set OPENCODE_CLIENT before importing (desktop sets it to "desktop") silently send the wrong client identifier on every models.dev request, and the test suite asserting the "/cli" suffix fails on those hosts.
Steps to reproduce
OPENCODE_CLIENT=desktop bun test packages/core/test/models.test.ts- The user-agent assertion fails with "opencode/local/local/desktop" instead of "/cli"
Fix incoming in PR #47510 (lazy per-request evaluation + regression test); filing per the Issue First policy so the drive-by fix is referenceable.
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neriousy commentedon Oct 19, 2026
In v2, the models.dev catalog request builds its User-Agent from app metadata passed in when the server starts, and
packages/coreno longer readsOPENCODE_CLIENTitself. Running the core models test withOPENCODE_CLIENT=desktopset therefore no longer changes the User-Agent it checks.