# C4 Diff0 — exact observation sequence
Zero field threshold: timestamps, stack paths, generated IDs, every logged payload and event order are retained. Columns align by observation ordinal, not by a claim of identical scheduling. This is a server transcript comparison; no pixel diff applies.
| # | Before | After |
|---|---|---|
|1|2026-11-03T04:09:50.362Z
C4
**environment**
{"kind": "CONTROLLED ADAPTER HARNESS; actual adapter, mocked SDK and native stream; no model or HTTP server", "caller": "start", "boundary": false, "maxOpsBeforeYield": "default", "node": "v26.12.1"}|2026-11-03T04:09:49.408Z
C4
**environment**
{"kind": "CONTROLLED ADAPTER HARNESS; actual adapter, mocked SDK and native stream; no model or HTTP server", "caller": "start", "boundary": false, "maxOpsBeforeYield": "default", "node": "v26.12.1"}|
|2|2026-11-03T04:09:50.377Z
C4
**mock session.command sent**
{"sessionID": "native-C4", "messageID": "msg_000000000001TdxOV8TMb7T4XZ3pDMYhlccBgvkP", "command": "slow", "arguments": "330", "model": "anthropic/claude-sonnet", "parts": []}|2026-11-03T04:09:49.436Z
C4
**mock session.command sent**
{"sessionID": "native-C4", "messageID": "msg_000000000001GCq0VYRxxXLX9PZHZpWqzPFwjJuK", "command": "slow", "arguments": "330", "model": "anthropic/claude-sonnet", "parts": []}|
|3|2026-11-03T04:09:50.378Z
C4
**emit matching user receipt**
{"messageID": "msg_000000000001TdxOV8TMb7T4XZ3pDMYhlccBgvkP"}|2026-11-03T04:09:49.436Z
C4
**emit matching user receipt**
{"messageID": "msg_000000000001GCq0VYRxxXLX9PZHZpWqzPFwjJuK"}|
|4|2026-11-03T04:09:50.378Z
C4
**span.end**
{"name": "OpenCode.submitPrompt", "exit": "success", "callerSettled": false, "submitSettled": false, "receiptDone": true}|2026-11-03T04:09:49.437Z
C4
**span.end**
{"name": "OpenCode.submitPrompt", "exit": "success", "callerSettled": false, "submitSettled": false, "receiptDone": true}|
|5|2026-11-03T04:09:50.379Z
C4
**span.end**
{"name": "OpencodeAdapter.startTurn", "exit": "success", "callerSettled": false, "submitSettled": true, "receiptDone": true}|2026-11-03T04:09:49.437Z
C4
**span.end**
{"name": "OpencodeAdapter.startTurn", "exit": "success", "callerSettled": false, "submitSettled": true, "receiptDone": true}|
|6|2026-11-03T04:09:50.379Z
C4
**caller.returned**
{"exit": "success"}|2026-11-03T04:09:49.437Z
C4
**caller.returned**
{"exit": "success"}|
|7|2026-11-03T04:09:50.379Z
C4
**emit native idle before HTTP rejection**
{}|2026-11-03T04:09:49.438Z
C4
**emit native idle before HTTP rejection**
{}|
|8|2026-11-03T04:09:50.380Z
C4
**turn.terminal**
{"type": "turn.terminal", "driver": "opencode", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "providerTurnId": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "runOrdinal": 1, "status": "completed", "failure": null, "threadDisposition": "reusable"}|2026-11-03T04:09:49.438Z
C4
**turn.terminal**
{"type": "turn.terminal", "driver": "opencode", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "providerTurnId": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "runOrdinal": 1, "status": "completed", "failure": null, "threadDisposition": "reusable"}|
|9|2026-11-03T04:09:50.380Z
C4
**reject command after caller settled**
{"callerSettled": true}|2026-11-03T04:09:49.439Z
C4
**reject command after caller settled**
{"callerSettled": true}|
|10|2026-11-03T04:09:50.381Z
C4
**span.end**
{"name": "opencode.session.command", "exit": "OpenCodeRuntimeError: \n at catch (/home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/OpenCodeRuntime.ts:157:7)\n at file:///home/ubuntu/wt/pr-27677-base/node_modules/.pnpm/effect@4.0.5/node_modules/effect/dist/internal/effect.js:779:40\n at opencode.session.command (/home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/OpenCodeRuntime.ts:158:18)\n at OpenCode.submitPrompt (/home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/adapter.ts:3276:22)\n at OpenCode.submitPrompt (definition) (/home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/adapter.ts:2939:37)\n at OpencodeAdapter.startTurn (/home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/evidence-controls.test.ts:195:13)\n at OpencodeAdapter.startTurn (definition) (/home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/adapter.ts:3122:29) {\n [cause]: TypeError: fetch failed\n at /home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/evidence-controls.test.ts:296:23 {\n [cause]: HeadersTimeoutError: Headers Timeout Error\n at /home/ubuntu/wt/pr-27677-base/packages/provider-opencode/src/server/evidence-controls.test.ts:296:76\n }\n}", "callerSettled": true, "submitSettled": true, "receiptDone": true}|2026-11-03T04:09:49.439Z
C4
**span.end**
{"name": "opencode.session.command", "exit": "OpenCodeRuntimeError: \n at catch (/home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/OpenCodeRuntime.ts:157:7)\n at file:///home/ubuntu/wt/pr-27677/node_modules/.pnpm/effect@4.0.5/node_modules/effect/dist/internal/effect.js:779:40\n at opencode.session.command (/home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/OpenCodeRuntime.ts:158:18)\n at OpenCode.submitPrompt (/home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/adapter.ts:3278:22)\n at OpenCode.submitPrompt (definition) (/home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/adapter.ts:2939:37)\n at OpencodeAdapter.startTurn (/home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/evidence-controls.test.ts:195:13)\n at OpencodeAdapter.startTurn (definition) (/home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/adapter.ts:3124:29) {\n [cause]: TypeError: fetch failed\n at /home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/evidence-controls.test.ts:296:23 {\n [cause]: HeadersTimeoutError: Headers Timeout Error\n at /home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/evidence-controls.test.ts:296:76\n }\n}", "callerSettled": true, "submitSettled": true, "receiptDone": true}|
|11|2026-11-03T04:09:50.381Z
C4
**snapshot after request failure before idle**
{"turns": [{"id": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "nodeId": "node-opencode-C4", "runAttemptId": "attempt-opencode-C4", "nativeTurnRef": {"driver": "opencode", "nativeId": "msg_000000000001TdxOV8TMb7T4XZ3pDMYhlccBgvkP", "strength": "weak"}, "ordinal": 1, "status": "completed", "startedAt": "1970-01-01T00:00:00.000Z", "completedAt": "1970-01-01T00:00:00.000Z", "turnTokenUsage": {"usageScope": "main_agent", "usageStatus": "unavailable", "hasSubagents": false}}], "terminalCount": 1}|2026-11-03T04:09:49.440Z
C4
**actual adapter request-error guard evaluated**
{"receiptDone": true, "callerSettled": true, "submitSettled": true, "stack": " at Proxy.isDoneUnsafe (/home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/evidence-controls.test.ts:259:21)\n at /home/ubuntu/wt/pr-27677/packages/provider-opencode/src/server/adapter.ts:2994:24\n at file:///home/ubuntu/wt/pr-27677/node_modules/.pnpm/effect@4.0.5/node_modules/effect/dist/internal/effect.js:1417:96"}|
|12|2026-11-03T04:09:50.381Z
C4
**final snapshot**
{"turns": [{"id": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "nodeId": "node-opencode-C4", "runAttemptId": "attempt-opencode-C4", "nativeTurnRef": {"driver": "opencode", "nativeId": "msg_000000000001TdxOV8TMb7T4XZ3pDMYhlccBgvkP", "strength": "weak"}, "ordinal": 1, "status": "completed", "startedAt": "1970-01-01T00:00:00.000Z", "completedAt": "1970-01-01T00:00:00.000Z", "turnTokenUsage": {"usageScope": "main_agent", "usageStatus": "unavailable", "hasSubagents": false}}], "terminals": [{"type": "turn.terminal", "driver": "opencode", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "providerTurnId": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "runOrdinal": 1, "status": "completed", "failure": null, "threadDisposition": "reusable"}]}|2026-11-03T04:09:49.440Z
C4
**snapshot after request failure before idle**
{"turns": [{"id": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "nodeId": "node-opencode-C4", "runAttemptId": "attempt-opencode-C4", "nativeTurnRef": {"driver": "opencode", "nativeId": "msg_000000000001GCq0VYRxxXLX9PZHZpWqzPFwjJuK", "strength": "weak"}, "ordinal": 1, "status": "completed", "startedAt": "1970-01-01T00:00:00.000Z", "completedAt": "1970-01-01T00:00:00.000Z", "turnTokenUsage": {"usageScope": "main_agent", "usageStatus": "unavailable", "hasSubagents": false}}], "terminalCount": 1}|
|13|2026-11-03T04:09:50.382Z
C4
**mock session.abort**
{}|2026-11-03T04:09:49.441Z
C4
**final snapshot**
{"turns": [{"id": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "nodeId": "node-opencode-C4", "runAttemptId": "attempt-opencode-C4", "nativeTurnRef": {"driver": "opencode", "nativeId": "msg_000000000001GCq0VYRxxXLX9PZHZpWqzPFwjJuK", "strength": "weak"}, "ordinal": 1, "status": "completed", "startedAt": "1970-01-01T00:00:00.000Z", "completedAt": "1970-01-01T00:00:00.000Z", "turnTokenUsage": {"usageScope": "main_agent", "usageStatus": "unavailable", "hasSubagents": false}}], "terminals": [{"type": "turn.terminal", "driver": "opencode", "providerThreadId": "provider-thread:provider:opencode:native-thread:native-C4", "providerTurnId": "provider-turn:provider:opencode:native-turn:native-C4%3Aattempt%3Aattempt-opencode-C4", "runOrdinal": 1, "status": "completed", "failure": null, "threadDisposition": "reusable"}]}|
|14|—|2026-11-03T04:09:49.441Z
C4
**mock session.abort**
{}|