opencode 1.16.2 has a non-deterministic silent-exit mode that fires on
short stdin prompts (observed 0-byte / <200-byte run logs, ~32% stall
rate on FoundingEngineer wake-payload-only runs). The root cause lives
in the opencode binary, not the adapter. As a server-side workaround,
ensure every prompt is at least 256 bytes by appending a deterministic
Paperclip Runtime Context block when the joined sections fall short.
- New exported helper padShortPrompt(input) in execute.ts
- New exported constant OPENCODE_PROMPT_MIN_LENGTH_CHARS = 256
- New promptMetrics.promptPadded (0/1) so the server can observe how
often the workaround fires
- Four new unit tests cover the long-prompt, short-prompt, empty-cwd,
and trailing-newline paths
Refs: ORA-284, ORA-275, ORA-276
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Paperclip