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feat: Pipeline Settings M1 — per-step model picker, system instructions, agent prompts (#170, v0.23.0)

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Additive per-step Pipeline Settings page. Reuses the existing model_select picker + versioned prompt registry; no migration. QA APPROVE for eea4968; CI green.

Agent-Session: pipeline-settings-m1-merge
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peptiderepo
2026-06-23 10:37:54 +07:00
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ARCHITECTURE.md
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@@ -866,6 +866,35 @@ Kept here for history. Until v0.8.2 the default image backend was FLUX.1 schnell
### #15: Optional Cloudflare AI Gateway in front of OpenRouter
We already use Cloudflare for DNS/CDN on peptiderepo.com, so layering AI Gateway in front of OpenRouter is zero marginal infrastructure. It gives us response caching (meaningful for repeated classification/scoring calls), a unified cost/latency dashboard, rate limiting, and provider fallback — all of which we would otherwise have to build ourselves to satisfy the CTO cost-tracking rules. Kept as an opt-in URL setting (`prautoblogger_ai_gateway_base_url`) so the plugin still works unchanged out of the box and can be bypassed instantly if the gateway misbehaves. The gateway is a transparent OpenRouter-compatible proxy; no new provider class is needed, and the response parsing path (`usage`, `choices[0].message.content`) is unchanged.
### #25: Pipeline Settings page — per-step model, prompts, params (v0.23.0, M1)
**Scope (M1 — additive):** A new "Pipeline" wp-admin submenu page
(`prautoblogger-pipeline`, slug `prautoblogger_page_prautoblogger-pipeline`) that
surfaces per-step configuration for every LLM stage. The page is ADDITIVE — the
existing Settings sections (AI Models, Content, Sources) remain in place. Decomposition
into stage-exclusive panels is M2.
**Classes:** `PRAutoBlogger_Pipeline_Settings_Page` (registration + asset enqueue),
`PRAutoBlogger_Pipeline_Settings_Renderer` (view data assembly + template include),
`PRAutoBlogger_Pipeline_Settings_Save_Handler` (nonce + capability + sanitize + write),
`PRAutoBlogger_Pipeline_Settings_Step_Map` (canonical step definitions + key allowlists).
**Model picker reuse:** `PRAutoBlogger_OpenRouter_Model_Field::render()` is called
directly — no fork, no new dropdown. The stage map in `get_stages_for_setting()` was
extended to include `prautoblogger_research_model → [research, llm_research]` and
`prautoblogger_image_model → [image_a, image_b]` so cost-preview is stage-accurate.
**Prompt writes:** Saving a prompt creates a new immutable row in `wp_prautoblogger_prompts`
via `PRAutoBlogger_Prompt_Registry_Writer::create_version()` and activates it.
Only the keys listed in `PRAutoBlogger_Pipeline_Settings_Step_Map::allowed_prompt_keys()`
may be updated through this page (allowlist enforced in the save handler).
**Security:** `manage_options` capability check + nonce verification on every POST.
Prompt bodies are sanitized with `sanitize_textarea_field()`.
**No new options:** M1 adds no persistent `wp_option` keys. Uninstall unchanged.
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### #22: Pipeline v2 Phase 1 substrate (v0.18.0, db 1.2.0, June 2026)