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Commit 1: editorial image prompt + style-template setting

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Pivot the image pipeline from the single-panel comic style to a text-free
editorial scientific illustration, and replace the Style Suffix setting with
an editable Style Template setting. Commit 1 of the in-plugin editorial image
pipeline (no composer yet; pipeline otherwise unchanged).

- New constant PRAUTOBLOGGER_DEFAULT_IMAGE_STYLE_TEMPLATE (brief §7 editorial
  template with the single {{ topic_summary }} token).
- New setting prautoblogger_image_style_template (textarea) replaces the
  Style Suffix field; single-token validation on save (brief A5); old
  prautoblogger_image_style_suffix mirrored to _deprecated for one cycle and
  not deleted (one-time migration prautoblogger_migrated_style_template_v0160).
- REWRITER_SYSTEM_PROMPT now emits a 1-2 sentence editorial topic/mechanism
  summary as the SCENE (no comic gag), keeping the CAPTION line for the
  unchanged HTML-caption-below-image path; scene/caption parsing contract
  preserved.
- New PRAutoBlogger_Image_Template_Filler substitutes the scene into the
  template's {{ topic_summary }} slot across all three entry points; strips
  control chars + clamps length (A5); degrades safely on missing token or
  empty summary so a blank/token-only prompt is never sent to the provider
  (A5/A6).
- Version bump 0.15.1 -> 0.16.0 + CHANGELOG + ARCHITECTURE.md updates.

Agent-Session: image-editorial-commit1
This commit is contained in:
peptiderepo
2026-05-30 00:04:26 +00:00
parent ac60c3d3a6
commit 5eb9e598b3
11 changed files with 335 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
includes/core/class-image-prompt-builder.php
View File

@@ -6,13 +6,16 @@ declare(strict_types=1);
*
* Builds image prompts from article content or source data.
*
* Uses a cheap LLM (via OpenRouter) to distill article content into concise
* visual scene descriptions optimised for image generation. Falls back to rule-based
* Uses a cheap LLM (via OpenRouter) to distill article content into a concise
* 1-2 sentence editorial topic/mechanism summary, then substitutes that summary
* into the admin-editable editorial style template (the {{ topic_summary }}
* slot) to produce a text-free image-gen prompt. Falls back to rule-based
* synthesis if the LLM call fails, so image generation never blocks on a
* prompt-rewriting outage.
*
* Triggered by: PRAutoBlogger_Image_Pipeline during content generation run.
* Dependencies: PRAutoBlogger_OpenRouter_Provider (LLM call),
* PRAutoBlogger_Image_Template_Filler (template substitution),
* PRAutoBlogger_Cost_Tracker (logs prompt-rewrite cost),
* PRAutoBlogger_Logger (diagnostics).
*
@@ -27,34 +30,39 @@ class PRAutoBlogger_Image_Prompt_Builder {
* prompts. Exposed as a `public const` so the admin-settings layer can
* use it as the default value for `prautoblogger_image_prompt_instructions`.
* The option, when non-empty, wins at call time (see rewrite_via_llm).
*
* Editorial pivot (v0.16.0): the model emits a concise topic/mechanism
* summary as the SCENE — concrete, single centered focal subject, no text,
* no people-as-gag, no logos — which the prompt builder substitutes into
* the editorial style template's {{ topic_summary }} slot. The CAPTION line
* is preserved unchanged for the existing HTML-caption-below-image path.
*/
public const REWRITER_SYSTEM_PROMPT = <<<'PROMPT'
You are a comedy writer and single-panel cartoon creator, like Gary Larson (The Far Side) meets science humor.
You write subject descriptions for a text-free editorial science illustration about peptides, supplements, or biohacking.
Given an article title and summary about peptides, supplements, or biohacking, create a SINGLE-PANEL COMIC concept. Output TWO parts separated by a blank line:
Given an article title and summary, output TWO parts separated by a blank line:
SCENE: One sentence describing the visual gag — a funny, absurd, or ironic situation related to the article's topic. Favor CONCRETE, HUMAN-SCALE scenes: people reacting to things, doctors and patients, scientists in a lab, gym bros with peptide vials, partners at a kitchen table, ordinary objects in ordinary rooms. Keep it simple — one clear visual joke, 1-3 characters max.
SCENE: A concise 1-2 sentence description of the article's core topic or mechanism, written as the SUBJECT of a single editorial illustration. Name ONE concrete, centered focal subject and the few supporting visual elements around it (e.g. a labelled-free vial and dropper, a stylised receptor on a cell membrane, a molecular chain, a dosing syringe, an organ cross-section). Favor a clear central focal point with margin around it so the image crops well. This is image-gen direction, not prose.
CAPTION: A short, punchy caption or speech bubble line (under 15 words) that delivers the punchline. The humor should be dry, nerdy, and accessible — the reader should chuckle even if they only half-understand the science.
CAPTION: A short, informative caption line (under 15 words) for display as HTML text below the image. Plain and editorial, not a joke.
Rules:
- The joke MUST relate to the article's actual subject matter, not generic science humor
- DO NOT personify molecules, peptides, hormones, proteins, or other chemical structures (no "anthropomorphic molecule", no "cartoon hormone"). Image models render anthropomorphized chemistry as incoherent blobs. If the article is about a substance, show a PERSON reacting to or using the substance; if the article is abstract (a mechanism, a process, a concept), fall back on a human observer reacting to its effect.
- Characters can have simple cartoon faces (round heads, dot eyes, expressive eyebrows)
- Keep the scene physically simple — few objects, clear staging, easy to read at thumbnail size
- The caption should work as a standalone joke even without the image
- No logos, watermarks, or branding
- The SCENE must depict the article's actual subject/mechanism, not a generic science scene.
- NO text, words, captions, speech bubbles, labels, or logos described in the SCENE — the illustration is text-free; text is rendered separately.
- NO people used as a visual gag and NO cartoon/comic framing. A human anatomical element (a cell, an organ, a hand holding a vial) is fine if it is the legitimate subject.
- Do NOT personify molecules, peptides, hormones, or proteins (no "smiling molecule"); depict them as clean stylised diagrams or structures.
- Keep the staging simple with one clear focal subject, readable at small sizes.
- Output ONLY the scene and caption. No preamble, no explanation.
Example output format:
A muscular gym bro stares, deflated, at a tiny glass vial in his hand while his friend squats a barbell effortlessly in the background.
A single glass peptide vial on a clean surface with a fine dropper above it, a faint stylised molecular chain arcing behind as a backdrop, centered with generous negative space.
"They told me the peptide did the work, not the squats."
A concentrated look at how the compound is prepared before use.
PROMPT;
/**
* Max tokens for the rewriter response. Comic concepts need more room
* for the scene description plus the caption punchline.
* Max tokens for the rewriter response. Enough room for the 1-2 sentence
* topic/mechanism summary plus the short editorial caption line.
*/
private const REWRITER_MAX_TOKENS = 180;
@@ -85,8 +93,9 @@ PROMPT;
* Build a visual prompt from finished article content.
*
* Tries LLM rewriting first; falls back to rule-based synthesis on
* failure. Splits scene (for image gen) from caption (HTML below the
* image) and appends the style suffix.
* failure. Splits scene (the topic summary, for image gen) from caption
* (HTML below the image) and substitutes the scene into the editorial
* style template's {{ topic_summary }} slot.
*
* @param array{post_title?: string, post_content?: string, suggested_title?: string} $article_data
* @return array{prompt: string, caption: string}
@@ -98,10 +107,8 @@ PROMPT;
$parsed = $this->rewrite_via_llm( $title, $first_para );
$style_suffix = $this->get_style_suffix();
return array(
'prompt' => trim( $parsed['scene'] . ' ' . $style_suffix ),
'prompt' => PRAutoBlogger_Image_Template_Filler::fill( $parsed['scene'] ),
'caption' => $parsed['caption'],
);
}
@@ -120,10 +127,8 @@ PROMPT;
$parsed = $this->rewrite_via_llm( $title, $context );
$style_suffix = $this->get_style_suffix();
return array(
'prompt' => trim( $parsed['scene'] . ' ' . $style_suffix ),
'prompt' => PRAutoBlogger_Image_Template_Filler::fill( $parsed['scene'] ),
'caption' => $parsed['caption'],
);
}
@@ -260,10 +265,9 @@ PROMPT;
* @return array{prompt: string, caption: string}
*/
public function build_fallback_prompt( string $title ): array {
$parsed = PRAutoBlogger_Image_Scene_Parser::synthesize_visual_concepts_fallback( $title, '' );
$style_suffix = $this->get_style_suffix();
$parsed = PRAutoBlogger_Image_Scene_Parser::synthesize_visual_concepts_fallback( $title, '' );
return array(
'prompt' => trim( $parsed['scene'] . ' ' . $style_suffix ),
'prompt' => PRAutoBlogger_Image_Template_Filler::fill( $parsed['scene'] ),
'caption' => $parsed['caption'],
);
}
@@ -281,20 +285,4 @@ PROMPT;
$override = (string) get_option( 'prautoblogger_image_prompt_instructions', '' );
return '' !== trim( $override ) ? $override : self::REWRITER_SYSTEM_PROMPT;
}
/**
* Get image style suffix with empty-string safeguard.
*
* Treats both absent and empty string as "use default" to prevent
* silent style loss if the admin settings field is saved empty.
*
* @return string The style suffix with safe fallback.
*/
private function get_style_suffix(): string {
$style_suffix = (string) get_option( 'prautoblogger_image_style_suffix', '' );
if ( '' === trim( $style_suffix ) ) {
$style_suffix = PRAUTOBLOGGER_DEFAULT_IMAGE_STYLE_SUFFIX;
}
return $style_suffix;
}
}