Path names: the serve's cwd is DATA_PATH/opencode_server, not opencode-sidecar. Two comments said
otherwise and would send the next reader to a directory that does not exist.
Version pin: the comment claimed "verified live against 1.17.9" as though that were a property of the
code. It is a property of whichever binary is installed, and this project already runs two — 1.17.9 here,
1.18.11 on the other machine. Says so now, and points at the test as the thing that actually enforces it.
Tests, the first on the OpenCode path. `runner.ts`'s NDJSON → ChatEvent mapping was described as pure and
untested; it was untested but not pure — it lived inside `handleLine` as a closure over `emit`, the
accumulated cost and a reported-session flag, so it could not be called without spawning a binary.
Extracted as `mapRunLine`, genuinely pure: line in, {sessionId, events, costDelta} out. The two concerns
that span lines stay with the caller, because they are not properties of a line — emitting the session id
exactly once, and accumulating cost across steps. Behaviour is unchanged.
11 tests over what the mapping forwards, what it drops and what it must not turn into NaN. The last one
matters: a missing `cost` on a step_finish would otherwise propagate NaN into the turn total.
Phase 1 is complete: dead code deleted (previous commit), comments corrected, tests added.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
pastilhasandClaude Opus 5
8b409e8af8