v1.2.10

1.2.10

Fixed

• Free models were unusable again: every request returned 403 FreeTierError
  because the gate now validates a second header, x-opencode-session-id, that
  freeTierHeaders did not send (verified against opencode 2.0.29).
• Free models outside the gpt / grok / muse families (cat-jam-free,
  deepseek-v4.1-flash-free, mimo-v2.6-flash-free, ...) returned
  400 ModelProtocolUnsupported. modelFromZen forced every free model onto
  OpenAI Responses, but the gateway serves each one on a fixed protocol:
  Responses for those three families, Chat Completions for the rest.
• Chat Completions free models rejected pi's own request shape with
  403 FreeTierError. The gate only accepts a title-generator-shaped
  conversation, so a run of three or more user messages (what pi sends for a
  system-reminder-annotated prompt) and native assistant.tool_calls / tool
  turns (what pi sends after a tool run) were both refused. The Completions path
  now flattens the history into one transcript, like the Responses path did, and
  the marker prompt text was resynced with the live one.