refactor: unify image-backend resolution with preferred_image_backend preference

Replaces the stateless ask-once backend rule with a 4-step resolution
(current-request override > saved preference > auto-select > ask) and
adds a single `preferred_image_backend` field (auto | ask | <backend-id>)
to every image-consuming skill's EXTEND.md schema. Runtime-native tools
(Codex `imagegen`, Hermes `image_generate`, ...) win by default; absent
field equals `auto` so existing user EXTEND.md files stay valid with no
schema version bump.

Each image-consuming skill also gains a top-level `## Changing
Preferences` section as a first-class surface for pinning a backend and
editing common one-line preferences.

Applies across:
  - baoyu-infographic (reverts in-progress two-field image_backend_mode design)
  - baoyu-comic
  - baoyu-cover-image
  - baoyu-image-cards
  - baoyu-article-illustrator
  - baoyu-slide-deck
  - baoyu-xhs-images
  - docs/image-generation-tools.md (canonical author-side doc)
This commit is contained in:
Jim Liu 宝玉
2026-04-21 16:43:58 -05:00
parent a4bd37c390
commit adb783ae6d
21 changed files with 258 additions and 72 deletions
@@ -142,13 +142,13 @@ preferred_tone: [selected tone or null]
preferred_layout: null
preferred_aspect: null
language: [selected or null]
preferred_image_backend: auto
character_presets: []
---
```
`preferred_image_backend: auto` is the baked-in default — first-time setup does not ask about it. The `## Image Generation Tools` rule in SKILL.md then picks the runtime-native tool (Codex `imagegen`, Hermes `image_generate`, etc.) when available, and falls back to installed backends.
## Modifying Preferences Later
Users can edit EXTEND.md directly or run setup again:
- Delete EXTEND.md to trigger setup
- Edit YAML frontmatter for quick changes
- Full schema: `config/preferences-schema.md`
See the `## Changing Preferences` section in `SKILL.md` for the canonical list of common edits (pin backend, change defaults, retrigger setup). Full schema: `config/preferences-schema.md`.
@@ -23,6 +23,8 @@ preferred_aspect: null # 3:4|4:3|16:9
language: null # zh|en|ja|ko|auto
preferred_image_backend: auto # auto|ask|<backend-id>
character_presets:
- name: my-characters
roles:
@@ -46,6 +48,7 @@ character_presets:
| `preferred_layout` | string | null | Layout preference or null |
| `preferred_aspect` | string | null | Aspect ratio (3:4, 4:3, 16:9) |
| `language` | string | null | Output language (null = auto-detect) |
| `preferred_image_backend` | string | `auto` | Image backend selection. `auto` = prefer runtime-native tool, fall back to the only installed backend, ask if multiple non-native are present. `ask` = always confirm on every run. `<backend-id>` (e.g., `codex-imagegen`, `baoyu-imagine`, `image_generate`) = pin this backend when available; fall back to `auto` when it isn't. Absent = `auto`. Resolution logic is documented in `SKILL.md`'s `## Image Generation Tools` section. |
| `character_presets` | array | [] | Preset character roles for styles like ohmsha |
## Art Style Options
@@ -122,6 +125,8 @@ preferred_aspect: "3:4"
language: zh
preferred_image_backend: codex-imagegen
character_presets:
- name: tech-tutorial
roles: