# Session-03 Child Session Plan

## Status

- Parent task: `2026-06-24-character-consistency`
- Session: `session-03`
- Runtime role: Codex thread-level child session
- Worker profile: `video-slide-production`
- Running mode: `prompt and generate`
- Assigned slide: `s21` only
- Resolved slide version: `s21-v3`
- Review: disabled
- Status: packet prepared; thread-level `Agent S-21` launch required

## Parent Task

This session restarts the S-21 character-consistency test using Codex thread-level child mechanics. Previous child/session ids must not be reused:

- Deprecated child session id: `019ef77d-552b-7343-abe4-88921b35d7ea`
- Previous multi-agent child id: `019ef7ca-413a-7662-9633-7fb126b7ef35`

This child session must start a separate thread-level single-slide worker named `Agent S-21` if thread tools are available. If that launch is not possible, the session must record `runtime fallback required` and stop. The child session must not write the prompt or generate the image as a fallback.

## Assigned Slides

| Slide | Scope | Version | Running mode | Review |
| --- | --- | --- | --- | --- |
| `s21` | `S-21: 那一簇火，指引方向` | `s21-v3` | `prompt and generate` | disabled |

No `s14`, `s25`, or other slide is in scope.

## Shared Context Read

- `AGENTS.md`
- `VIDEO_WORKBENCH.md`
- `docs/workflows/slide-task-orchestration.md`
- `docs/workflows/slide-task-templates.md`
- `projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/task-plan.md`
- `projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/task-log.md`
- `projects/2026-06-23-在路上/project.md`
- `projects/2026-06-23-在路上/execution-plan.md`
- `projects/2026-06-23-在路上/visual-system/visual-system.md`
- `projects/2026-06-23-在路上/visual-system/style/style-prompt-master.md`
- `projects/2026-06-23-在路上/visual-system/characters/character-reference-registry.md`
- `projects/2026-06-23-在路上/intake/阶段五-人物一致性单镜.md`
- `projects/2026-06-23-在路上/slides/slides.md`
- `projects/2026-06-23-在路上/slides/broad-generation-self-audit-v1.md`
- `investigations/2026-06-24-s14-reference-capable-generation/reviews/summary-and-rule-implications.md`
- `C:\Users\wangq\.agents\skills\gpt-image-2\SKILL.md`

## Artifact Version / Write Policy

Version scan result from `projects/2026-06-23-在路上/slides/s21/`:

- Existing: `s21-v1-image.png`
- Existing: `s21-v2-brief.md`
- Next unused version: `s21-v3`

Overwrite allowed: no.

Before writing, the following target paths were checked clear:

- `projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/session-03/child-session-plan.md`
- `projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/session-03/child-session-handoff.md`
- `projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/session-03/packets/s21-v3-slide-agent-packet.md`
- `projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/session-03/returns/s21-v3-slide-agent-return.md`
- `projects/2026-06-23-在路上/slides/s21/s21-v3-brief.md`
- `projects/2026-06-23-在路上/slides/s21/s21-v3-prompt.md`
- `projects/2026-06-23-在路上/slides/s21/s21-v3-image.png`
- `projects/2026-06-23-在路上/slides/s21/s21-v3-review.md`

The child session writes only the plan, brief, packet, and handoff. `Agent S-21` owns the prompt, image, and return.

## Per-Slide Work Order

1. Resolve next unused `s21-vN` version from existing `s21-v*-*` files.
2. Write `projects/2026-06-23-在路上/slides/s21/s21-v3-brief.md`.
3. Write `projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/session-03/packets/s21-v3-slide-agent-packet.md`.
4. Start one separate thread-level slide worker named `Agent S-21`.
5. Give `Agent S-21` the packet path and require it to write only `s21-v3-prompt.md`, `s21-v3-image.png`, and `session-03/returns/s21-v3-slide-agent-return.md`.
6. Poll for the return if possible.
7. Write `child-session-handoff.md`.

## Agent Packet Path

```text
projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/session-03/packets/s21-v3-slide-agent-packet.md
```

## Stop Conditions

- A target output file already exists.
- Thread-level `Agent S-21` cannot be started.
- `Agent S-21` cannot load the real character reference image into visible generation context.
- `gpt-image-2` mode check no longer supports host/advisor prompt work.
- Host image generation is unavailable.
- A review artifact would be required or created despite review being disabled.