fix(session): restore x-opencode-* headers so Zen free tier accepts requests - #1130
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…equests
The rebrand renamed the headers sent to opencode.ai/zen to x-teamcode-* and
changed the provider guard to startsWith("teamcode"), which never matches.
Zen now rejects every free-tier request with 400 MissingSessionID
("OpenCode's free tier can only be used in OpenCode").
Headers for opencode and opencode-go providers now match upstream
(x-opencode-session/request/client, x-opencode-project when available,
User-Agent opencode/<version>). Other providers keep the teamcode
User-Agent and also gain X-Session-Id, as upstream does.
Header assembly moved to LLMHeaders.build so it can be unit tested.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Problem
Since the rebrand, every request to the OpenCode Zen free tier fails with:
Commit
1f037c3renamed the Zen headers tox-teamcode-*and changed the provider guard toproviderID.startsWith("teamcode"). No provider is namedteamcode, so the branch never runs and Zen receives onlyx-session-affinity.Fix
LLMHeaders.build(packages/teamcode/src/session/llm-headers.ts).opencodeandopencode-gosendx-opencode-session,x-opencode-request,x-opencode-client,x-opencode-project(when a project id exists) andUser-Agent: opencode/<version>, matching upstreamsst/opencode(session/llm/request.ts).User-Agent: teamcode/<version>and now also sendX-Session-Id, as upstream does.x-parent-session-idis forwarded for every provider.llm.tsfixed (unusedcfg, unnecessary non-null assertion, two unsafe type assertions). TheGitLabWorkflowLanguageModelassertion at line 223 is pre-existing and untouched.Verification
bun test test/session/llm-headers.test.ts test/session/llm.test.ts: 19 pass, 0 fail.tsc --noEmitclean forsession/llm*.teamcode run -m opencode/mimo-v2.5-free "..."completes withfinish=stopindev.log; before the patch the same model returned the 400 above.🤖 Generated with Claude Code