peptide-geo-monitor v0.1.0: internal AI-visibility dashboard (#1)

New internal plugin: weekly LLM probes of core peptides (Perplexity sonar + GPT/Gemini-search via OpenRouter/CF gateway) -> custom table -> wp-admin trendline + standings. Provider interface + cost ledger w/ hard $5/mo cap + collector/panel seam (AI-visibility only). v1 = AI-visibility only.

QA: APPROVE-WITH-P2-NOTES — qa-reviews/peptide-geo-monitor/2026-06-13-f488f4a966cbb9e771d3abc20daee3fa49074520.md (P2 follow-ups: ltrim www display bug, PHPCS mandatory, dead cache)

Agent-Session: geomonitor v0.1.0 merge

CONTEXT.md

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+# Context — Domain Glossary (Peptide GEO Monitor)
+
+**Version:** 0.1.0 | **Last updated:** 2026-06-13
+
+This file is the ubiquitous-language glossary for `peptide-geo-monitor`. Every term below has a precise meaning within this codebase. AI agents and human contributors should use this terminology consistently.
+
+---
+
+## Core domain terms
+
+### AI Visibility
+Whether and where peptiderepo.com appears in AI assistant responses to peptide-related queries. The core metric this plugin measures.
+
+**Code identifiers:** `PGM_Ai_Visibility_Collector`, `PGM_Ai_Visibility_Panel`, table column `cited`, option prefix `pgm_`.
+
+### Probe
+A single server-side LLM API call with a specific `(peptide, intent, model)` combination. The result is a `PGM_Probe_Result` value object.
+
+**Code identifiers:** `PGM_Probe_Provider::probe()`, `PGM_Probe_Runner::run()`.
+
+### Probe Run
+A batch execution of all configured `peptides × prompt_intents × models`. Identified by a `run_id` (UUID). One cron tick = one run; the "Run now" button also triggers a run.
+
+**Code identifiers:** `PGM_Probe_Runner::run()`, `run_id` column in `pgm_ai_visibility`.
+
+### Peptide
+A compound being tracked (e.g. BPC-157, TB-500). Stored as a slug + label pair in the `pgm_peptides` option.
+
+**Code identifiers:** `pgm_peptides` option, `peptide_slug` + `peptide_label` columns.
+
+### Prompt Intent
+A query template describing a searcher's intent (e.g. "what is {peptide}", "{peptide} reconstitution guide"). The `{peptide}` placeholder is replaced with the peptide's label at runtime.
+
+**Code identifiers:** `pgm_prompt_intents` option, `prompt_intent` column.
+
+### Citation / Cited
+A probe is **cited** when `peptiderepo.com` appears in the LLM's source/citation list for that response. The `cited` column is `TINYINT(1)` (1 = cited, 0 = not cited).
+
+**Code identifiers:** `PGM_Citation_Detector::is_cited()`, `cited` column, `PGM_Probe_Result::is_cited()`.
+
+### Source Domains
+The list of domains returned by the LLM as its sources for a given response (e.g. `["peptiderepo.com", "examine.com"]`). Stored as JSON in `source_domains`.
+
+**Code identifiers:** `PGM_Citation_Detector::parse_domains()`, `PGM_Probe_Result::get_source_domains()`, `source_domains` column.
+
+### Our Position
+The 1-based rank of `peptiderepo.com` in the source domains list for a cited probe (`NULL` when not cited). Position 1 = we appear first.
+
+**Code identifiers:** `PGM_Citation_Detector::get_our_position()`, `our_position` column, `PGM_Probe_Result::get_our_position()`.
+
+### Visibility Score
+A composite metric summarising peptiderepo.com's AI visibility for a run.
+
+**Formula:**
+```
+base_score     = cited_probes / total_probes
+position_bonus = Σ(1 / our_position) for each cited probe / total_probes
+visibility_score = round((base_score + position_bonus) / 2, 4)
+```
+
+- **Range:** [0.0, 1.0]. Score 1.0 requires 100% citation rate at position 1 for all probes.
+- **Why position-weighted?** Being cited at position 1 is more valuable than position 10. The 1/position term gives a graduated bonus: position 1 = 1.0, position 2 = 0.5, position 5 = 0.2, etc.
+- **Stored:** Computed from aggregate DB rows per run in `PGM_Ai_Visibility_Collector::compute_score()`, not persisted as a column (recomputed on page load).
+
+**Code identifiers:** `PGM_Ai_Visibility_Collector::compute_score()`, trendline data in `collect()`.
+
+### Monthly Budget Cap
+The maximum USD spend on LLM API calls in a calendar month. Stored in `pgm_monthly_budget_usd` (default `$5.00`). The runner checks `PGM_Cost_Ledger::can_afford()` **before** each probe and stops gracefully when the cap is reached.
+
+**Code identifiers:** `PGM_Cost_Ledger`, `pgm_monthly_budget_usd` option, `PGM_DEFAULT_MONTHLY_BUDGET_USD` constant.
+
+### Provider
+An implementation of `PGM_Probe_Provider` that wraps one LLM backend. v1 ships `PGM_Perplexity_Provider` (sonar) and `PGM_OpenRouter_Provider` (parameterised).
+
+**Code identifiers:** `interface-pgm-probe-provider.php`, `PGM_Perplexity_Provider`, `PGM_OpenRouter_Provider`.
+
+### Collector / Panel Seam
+The extensibility mechanism: `PGM_Data_Collector` produces data; `PGM_Dashboard_Panel` renders it. Both are registered with `PGM_Collector_Registry`. v1 ships only the AI-visibility pair; future SEO categories add new pairs without touching the shell.
+
+**Code identifiers:** `interface-pgm-data-collector.php`, `interface-pgm-dashboard-panel.php`, `PGM_Collector_Registry`.
+
+### GEO
+Generative Engine Optimization — the practice of improving a brand's visibility in AI-generated responses. This plugin is the measurement instrument for peptiderepo.com's GEO program.
+
+### Proxy Metric
+The plugin's scores are API-probe measurements, not real-world consumer LLM usage. The admin page labels these explicitly as "a directional proxy, not the consumer ChatGPT/Gemini apps."
+
+**Code identifiers:** `PGM_Ai_Visibility_Panel::render_proxy_note()`.
+
+### MTD Cost
+Month-to-date spend in USD, summed from the `cost_usd` column for rows in the current calendar month.
+
+**Code identifiers:** `PGM_Cost_Ledger::get_month_to_date_usd()`.