# Runtime evidence for [#33105](https://git.cafe/pingdotgg/t3code/pull/33105)

Before: [4c361199](https://git.cafe/pingdotgg/t3code/commit/4c361199f47f6ea32a2c14835df392640d0f7c63); after: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Linux 6.8.0-117-generic x86_64; Node v26.12.1; Claude Code 2.1.321. Same installed executable on both sides. Real T3 dev servers used fresh revision-owned databases under this scratch directory, started with `T3CODE_DEV_SEED=0`. No live database or credentials were copied.

Only `CLAUDE_CODE_ENTRYPOINT`, `CLAUDE_CODE_ARTIFACT`, and `claude_code_artifact` are recorded from child environments; JSON null means absent. Wrapper PID/parent and CLI child PID are synthetic-run process identifiers. All model identifiers, session/account identifiers, unrelated tools and output are removed. Original stdout remains private. These are actual process and init captures, not test expectations.

Claude was reached through its native CLI with a synthetic API credential and a deliberately unreachable loopback API endpoint. No model response or successful authentication is claimed. The wrapper forwards CLI stdout unmodified and terminates its owned CLI after observing init; code 143 is that intentional stop, not auth failure. C2 capability probes have control initialization but no prompt/init tool list. C3 uses JSON output, with a five-second owned-child stop after spawn-env capture; no answer is required. Artifact counts are exactly the names `Artifact`, `ArtifactComments`, `ArtifactData` in real `system/init` events.

AI-assisted; verified with the tests and tools listed above.


# Head C1 precedence controls

H is set on the actual server process; I is set through the provider-instance environment in server.updateSettings. U means absent. Each control uses a fresh synthetic Claude home/project. No direct CLI assignment is used as evidence of instance precedence. The head controls are intentionally head-only, as required by the matrix.

## E1: H=U, I=0

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `final-E1-head-20261110T072803Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-304121.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "0", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "final-E1-head", "pid": 304121, "ppid": 302504, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 304126}

{"artifactToolCount": 0, "artifactTools": [], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```

## E2: H=U, I=1

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `final-E2-head-20261110T072804Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-304327.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "1", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "final-E2-head", "pid": 304327, "ppid": 302504, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 304336}

{"artifactToolCount": 3, "artifactTools": ["Artifact", "ArtifactComments", "ArtifactData"], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```

## E3: H=0, I=U

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `authoritative-head-host-off-20261110T072912Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-308603.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "0", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "authoritative-head-host-off", "pid": 308603, "ppid": 306983, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 308612}

{"artifactToolCount": 0, "artifactTools": [], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```

## E4: H=0, I=0

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `authoritative-E4-head-20261110T073020Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-308816.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "0", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "authoritative-E4-head", "pid": 308816, "ppid": 306983, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 308831}

{"artifactToolCount": 0, "artifactTools": [], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```

## E5: H=1, I=0

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `authoritative-E5-head-20261110T072943Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-308661.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "0", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "authoritative-E5-head", "pid": 308661, "ppid": 305627, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 308665}

{"artifactToolCount": 0, "artifactTools": [], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```

## E6: H=1, I=U

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `authoritative-head-host-on-20261110T072837Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-306764.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "1", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "authoritative-head-host-on", "pid": 306764, "ppid": 305627, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 306785}

{"artifactToolCount": 3, "artifactTools": ["Artifact", "ArtifactComments", "ArtifactData"], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```

## E7: H=0, I=1

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `authoritative-E7-head-20261110T073020Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-308938.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "1", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "authoritative-E7-head", "pid": 308938, "ppid": 306983, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 308944}

{"artifactToolCount": 3, "artifactTools": ["Artifact", "ArtifactComments", "ArtifactData"], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```

## E8: H=1, I=1

Commit: [1bc13bdd](https://git.cafe/pingdotgg/t3code/commit/1bc13bddf86515d310344be3e7e4820a851fa1bb). Full SHA is recorded below. `claude --version`: `2.1.321 (Claude Code)`.

Run: `authoritative-E8-head-20261110T072943Z`. Synthetic settings: `{}`.

Captured wrapper record `spawn-308730.jsonl`:

```jsonl

{"argvSummary": {"hasJsonSchema": false, "hasSessionId": false, "outputFormat": "stream-json", "print": false, "toolsArgumentPresent": false}, "claudeVersion": "2.1.321 (Claude Code)", "commit": "1bc13bddf86515d310344be3e7e4820a851fa1bb", "env": {"CLAUDE_CODE_ARTIFACT": "1", "CLAUDE_CODE_ENTRYPOINT": "t3-code", "claude_code_artifact": null}, "event": "spawn", "fixture": "authoritative-E8-head", "pid": 308730, "ppid": 305627, "route": "C1 session or C2 capability probe", "settings": {}}

{"event": "exec-child", "pid": 308738}

{"artifactToolCount": 3, "artifactTools": ["Artifact", "ArtifactComments", "ArtifactData"], "event": "system/init", "modelField": "removed", "sessionId": "removed", "unrelatedTools": "removed"}

{"code": 143, "event": "exit", "initObserved": true}

```