feat(core): write logs as state jsonl

[opencode-agent]

Summary

• move local file logging into @opencode-ai/core/effect/logger and delete packages/core/src/util/log.ts
• remove Log.init and the node Log export; CLI flags now set runtime env (OPENCODE_LOG_FILE, OPENCODE_LOG_LEVEL, OPENCODE_PRINT_LOGS) before Effect runtimes are built
• keep the default log path as $XDG_STATE_HOME/opencode/log.jsonl
• write structured JSONL records from Effect logging with ts, level, message, run_id, process_role, pid, service, and fields
• remove out-of-context startup/fatal/process logs instead of recreating an out-of-band sink

Evidence

Fresh terminal-control snapshot is posted in PR comment: #30966 (comment)

Verification

• bun test test/util/log.test.ts --timeout 30000
• bun test test/effect/app-runtime-logger.test.ts --timeout 30000
• bun test test/server/httpapi-sync.test.ts --timeout 30000
• bun typecheck in packages/core
• bun typecheck in packages/opencode
• bun typecheck in packages/desktop
• pre-push hook: bun turbo typecheck with Bun 1.3.14

[opencode-agent]

Updated per review: removed Log.init, deleted packages/core/src/util/log.ts, and moved the JSONL sink into @opencode-ai/core/effect/logger so file logging happens through Effect.log* / EffectLogger.layer. Also removed the node Log export and stripped test Log.init setup.

Fresh terminal-control evidence from the updated tree:

default log file: /tmp/opencode/log-evidence.JOiat8/state/opencode/log.jsonl
raw jsonl:
{"ts":"2026-06-05T14:29:01.372Z","level":"INFO","message":"handle hello","run_id":"6c60e90b-8330-498e-8ff4-be9d8de060da","process_role":"main","pid":9121,"service":"evidence.handle","fields":{"answer":42}}
{"ts":"2026-06-05T14:29:01.373Z","level":"WARN","message":"effect warning","run_id":"6c60e90b-8330-498e-8ff4-be9d8de060da","process_role":"main","pid":9121,"service":"evidence.effect","fields":{"session.id":"session-1"}}
parsed summary:
{"level":"INFO","message":"handle hello","service":"evidence.handle","run_id":"string","pid":9121,"process_role":"main","fields":{"answer":42}}
{"level":"WARN","message":"effect warning","service":"evidence.effect","run_id":"string","pid":9121,"process_role":"main","fields":{"session.id":"session-1"}}

Verification run after this update:

• bun test test/util/log.test.ts --timeout 30000
• bun test test/effect/app-runtime-logger.test.ts --timeout 30000
• bun test test/server/httpapi-sync.test.ts --timeout 30000
• bun typecheck in packages/core
• bun typecheck in packages/opencode
• bun typecheck in packages/desktop
• pre-push hook: bun turbo typecheck with Bun 1.3.14

[opencode-agent]

Terminal log output snapshot from this run:

INFO  2026-06-05T14:29:35 service=log.evidence answer=42 jsonl evidence
log_file=/tmp/tmp.rCzfMmNCmt/log.jsonl
{"ts":"2026-06-05T14:29:35.300Z","level":"INFO","message":"jsonl evidence","run_id":"6c60e90b-8330-498e-8ff4-be9d8de060da","process_role":"main","pid":9224,"service":"log.evidence","fields":{"answer":42}}

Verification on the pushed branch:

• bun test test/util/log.test.ts --timeout 30000: 3 pass
• bun test test/effect/app-runtime-logger.test.ts --timeout 30000: 4 pass
• bun test test/server/httpapi-sync.test.ts --timeout 30000: 2 pass, 1 skip
• bun typecheck in packages/core
• bun typecheck in packages/opencode
• bun typecheck in packages/desktop
• pre-push hook passed: bun turbo typecheck with Bun 1.3.14

[opencode-agent]

Follow-up for logger-handle removal:

• Removed the EffectLogger.create handle API and kept the concrete logger sink private to @opencode-ai/core/effect/logger.
• Replaced app/test logger handle usage with direct Effect.log* + Effect.annotateLogs(...).
• Removed out-of-Effect-context bridge logging (Effect.runSync(Effect.log*)) instead of preserving non-Effect logs.
• Deleted the remaining console Log.create util and its actor usage.
• Kept OTLP + file logging wired through EffectLogger.layerWith(...) without exporting the logger object.

Evidence:

$ grep search: EffectLogger.create|Log.create|EffectLogger.logger|Effect.runSync(Effect.log*)
# no matches in packages/**/*.ts

$ bun test test/util/log.test.ts --timeout 30000
3 pass, 0 fail

$ bun test test/effect/app-runtime-logger.test.ts --timeout 30000
4 pass, 0 fail

$ bun typecheck # packages/core
pass

$ bun typecheck # packages/opencode
pass

$ bun typecheck # packages/console/core
pass

$ PATH="/tmp/opencode/bun-1.3.14/node_modules/.bin:$PATH" git push origin feat/jsonl-log-file
pre-push: bun turbo typecheck
19 successful, 19 total

Commit: 45f257da7 refactor(core): remove logger handles

[opencode-agent]

follow-up for the logger-handle cleanup:

• converted the remaining swallowed Effect-flow failures in bus and plugin to direct Effect.logError calls
• fixed bus finalizers so Effect.logInfo("unsubscribing") actually executes instead of creating an unused Effect value
• left desktop electron-log alone because it backs desktop debug export/crash/net logs outside the Effect runtime path

verification:

• bun typecheck in packages/opencode
• bun typecheck in packages/core
• bun test test/util/log.test.ts --timeout 30000
• bun test test/effect/app-runtime-logger.test.ts --timeout 30000
• bun test test/server/httpapi-sync.test.ts --timeout 30000
• pre-push bun turbo typecheck with Bun 1.3.14