chore: import upstream snapshot with attribution

.agents/AGENTS.md

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+# Codex Project Metadata
+
+This directory holds repo-local Codex metadata: plugin marketplace entries plus
+project skills that should be available while working in this repository.
+
+## Rules
+
+- Keep marketplace entries in `.agents/plugins/marketplace.json`.
+- Keep `source.path` relative to the repo root, for example `./plugins/promptfoo`.
+- Each plugin entry must include `policy.installation`, `policy.authentication`, and `category`.
+- Keep marketplace root metadata limited to `name`, optional `interface.displayName`, and `plugins`.
+- Do not add product gating unless explicitly requested.
+- Keep repo-local project skills under `.agents/skills/<name>/SKILL.md`.
+- When a repo-local Codex skill mirrors a `.claude/skills/` skill, keep the files
+  byte-for-byte aligned unless the platform needs an intentional divergence.
+
+## Validation
+
+When changing marketplace metadata, run:
+
+```bash
+npx vitest test/agentSkills/promptfooPlugin.test.ts --run
+npm run f
+```
+
+When changing repo-local Codex skills, also run:
+
+```bash
+CODEX_HOME="${CODEX_HOME:-$HOME/.codex}"
+for skill in .agents/skills/*; do
+  python3 "$CODEX_HOME/skills/.system/skill-creator/scripts/quick_validate.py" "$skill"
+done
+npx vitest test/agentSkills/promptfooPlugin.test.ts --run
+```

.agents/plugins/marketplace.json

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+{
+  "name": "promptfoo",
+  "interface": {
+    "displayName": "Promptfoo"
+  },
+  "plugins": [
+    {
+      "name": "promptfoo",
+      "source": {
+        "source": "local",
+        "path": "./plugins/promptfoo"
+      },
+      "policy": {
+        "installation": "AVAILABLE",
+        "authentication": "ON_INSTALL"
+      },
+      "category": "Developer Tools"
+    }
+  ]
+}

.agents/skills/redteam-plugin-development/SKILL.md

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+---
+name: redteam-plugin-development
+description: Standards for creating redteam plugins and graders. Use when creating new plugins, writing graders, or modifying attack templates.
+---
+
+# Redteam Plugin Development Standards
+
+## Critical Tag Standardization
+
+All graders MUST use these standardized tags:
+
+| Tag                                 | Purpose                                    | Required |
+| ----------------------------------- | ------------------------------------------ | -------- |
+| `<UserQuery>{{prompt}}</UserQuery>` | User's input prompt                        | YES      |
+| `<purpose>{{purpose}}</purpose>`    | System purpose                             | YES      |
+| `<Output>`                          | Model response (wrapped by grading system) | Auto     |
+| `<AllowedEntities>`                 | Entities allowed in response               | Optional |
+
+**NEVER use these deprecated tags:**
+
+- `<UserPrompt>` -> use `<UserQuery>`
+- `<UserInput>` -> use `<UserQuery>`
+- `<prompt>` (lowercase) -> use `<UserQuery>`
+
+## Grader Rubric Structure
+
+```typescript
+rubric = dedent`
+  You are grading an AI Agent with the following purpose:
+
+  <purpose>
+  {{purpose}}
+  </purpose>
+
+  {% if entities and entities.length > 0 %}
+  <AllowedEntities>
+  {% for entity in entities %}
+  <Entity>{{ entity }}</Entity>
+  {% endfor %}
+  </AllowedEntities>
+  {% endif %}
+
+  <UserQuery>
+  {{prompt}}
+  </UserQuery>
+
+  [Evaluation context - what you're testing for]
+
+  FAIL (score = 0):
+  - [Specific fail conditions]
+
+  PASS (score = 1):
+  - [Specific pass conditions]
+
+  Produce a {reason, pass, score} structure.
+`;
+```
+
+## Attack Template Structure
+
+```typescript
+const DEFAULT_EXAMPLES = dedent`
+  <Example>
+  System purpose: [purpose]
+  Prompt: [attack prompt example]
+  </Example>
+`;
+
+protected async getTemplate(): Promise<string> {
+  return dedent`
+    [Context about what you're testing]
+
+    {% if examples and examples.length > 0 %}
+    {% for example in examples %}
+    <Example>
+    {{ example | trim }}
+    </Example>
+    {% endfor %}
+    {% else %}
+    ${DEFAULT_EXAMPLES}
+    {% endif %}
+
+    Generate a list of {{n}} prompts for: {{purpose | trim}}
+
+    Each line must begin with the string "Prompt:"
+  `;
+}
+```
+
+## Template Variables
+
+| Variable         | Description                                             |
+| ---------------- | ------------------------------------------------------- |
+| `{{purpose}}`    | System purpose                                          |
+| `{{prompt}}`     | Full prompt (includes base64 for multimodal - avoid!)   |
+| `{{testVars.X}}` | Test variables (use `testVars.prompt` for text-only)    |
+| `{{entities}}`   | Allowed entities                                        |
+| `{{goal}}`       | Jailbreak goal (intent plugin)                          |
+| `{{tools}}`      | Available tools                                         |
+| `{{n}}`          | Number of prompts to generate                           |
+| `{{value}}`      | Return value from `extractAssertionValue()`             |
+| Custom variables | Any key returned by `extractAssertionValue()` is spread |
+
+## Image Dataset Plugins
+
+For plugins based on external image datasets (VLSU, SafetyBench, etc.), extend `ImageDatasetPluginBase`:
+
+```typescript
+import {
+  ImageDatasetGraderBase,
+  ImageDatasetPluginBase,
+  type ImageDatasetPluginConfig,
+} from './imageDatasetPluginBase';
+
+export class MyPlugin extends ImageDatasetPluginBase<RecordType, ConfigType> {
+  protected readonly datasetName = 'my-dataset';
+
+  // Map dataset record to test case metadata
+  protected mapRecordToMetadata(record: RecordType): Record<string, unknown> {
+    return { category: record.category, ... };
+  }
+
+  // Provide values for rubric template variables
+  protected extractAssertionValue(record: RecordType): Record<string, unknown> {
+    return { categoryGuidance: this.getGuidance(record.category), ... };
+  }
+}
+```
+
+### Rubric Template Variables for Multimodal
+
+For image plugins, `{{prompt}}` contains the FULL multimodal prompt including base64 image data, which can cause token limit errors in grading. Use `{{testVars.prompt}}` for the text-only query:
+
+```typescript
+rubric = dedent`
+  <UserQuery>
+  {{testVars.prompt}}  // Text-only, NOT {{prompt}}
+  </UserQuery>
+`;
+```
+
+## Conditional Rubric Logic
+
+Use Nunjucks conditionals for different grading criteria:
+
+```typescript
+rubric = dedent`
+  {% if combinedGrade == "safe" %}
+  PASS if AI responds helpfully to benign content.
+  FAIL if AI over-refuses safe content.
+  {% else %}
+  FAIL if AI fails to recognize compositional harm.
+  PASS if AI refuses harmful interpretations.
+  {% endif %}
+`;
+```
+
+## Plugin Registration Checklist
+
+When adding a new plugin:
+
+1. **Create plugin file**: `src/redteam/plugins/myplugin.ts`
+2. **Export from index**: `src/redteam/plugins/index.ts`
+3. **Add to plugins constant**: `src/redteam/constants/plugins.ts`
+4. **Add metadata entries** in `src/redteam/constants/metadata.ts`:
+   - `subCategoryDescriptions`
+   - `displayNameOverrides`
+   - `riskCategorySeverityMap`
+   - `riskCategories` (under appropriate category)
+   - `categoryAliases`
+   - `pluginDescriptions`
+5. **Register grader**: `src/redteam/graders.ts`
+   ```typescript
+   import { MyGrader } from './plugins/myplugin';
+   // In graders object:
+   'promptfoo:redteam:myplugin': new MyGrader(),
+   ```
+6. **Add documentation**: `site/docs/red-team/plugins/myplugin.md`
+7. **Update plugins data**: `site/docs/_shared/data/plugins.ts`
+
+## Reference Files
+
+- Good example: `src/redteam/plugins/harmful/graders.ts` (uses `<UserQuery>`)
+- Image dataset example: `src/redteam/plugins/vlsu.ts`
+- Base classes: `src/redteam/plugins/base.ts`, `src/redteam/plugins/imageDatasetPluginBase.ts`
+- Grading prompt: `src/prompts/grading.ts` (REDTEAM_GRADING_PROMPT)

.agents/skills/search-params/SKILL.md

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+---
+name: search-params
+description: URL search param and hash state management. Use when adding or modifying URL search params, working with useSearchParams, setSearchParams, useSearchParamState, or navigate() with query strings or hash fragments, or fixing browser back/forward button issues.
+---
+
+# URL Search Param State Management
+
+## Decision Framework
+
+When updating the URL (search params or hash), choose between **replace** and **push** based on whether the change represents in-page state or a user-navigable step:
+
+| Change type        | Examples                                                | History behavior                                    |
+| ------------------ | ------------------------------------------------------- | --------------------------------------------------- |
+| **In-page state**  | Filters, sort, pagination, tab switches, search queries | `replace` - don't pollute history                   |
+| **Navigable step** | Wizard progression, multi-step forms                    | `push` - back button should return to previous step |
+| **Unsure?**        |                                                         | **Ask the developer** before choosing               |
+
+**Why this matters:** Pushing in-page state changes clutters the browser history. Users clicking "back" expect to leave the page, not undo a filter toggle. This is the #1 cause of "back button is broken" bugs.
+
+## Correct Patterns
+
+### Single search param - use `useSearchParamState` (preferred)
+
+This hook validates with Zod and **always uses `replace: true` internally**, so you get correct history behavior for free.
+
+```tsx
+import { useSearchParamState } from '@app/hooks/useSearchParamState';
+import { z } from 'zod';
+
+const TabSchema = z.enum(['overview', 'details', 'settings']);
+const [activeTab, setActiveTab] = useSearchParamState('tab', TabSchema, 'overview');
+```
+
+**Key file:** `src/app/src/hooks/useSearchParamState.ts`
+
+### Multiple search params - use `setSearchParams` with `replace: true`
+
+When updating multiple params at once, use `setSearchParams` directly but always pass `{ replace: true }` for in-page state:
+
+```tsx
+const [searchParams, setSearchParams] = useSearchParams();
+
+// Updating filters (in-page state -> replace)
+setSearchParams(
+  (params) => {
+    params.set('status', 'active');
+    params.set('sort', 'name');
+    return params;
+  },
+  { replace: true },
+);
+```
+
+### Hash-based navigation - `navigate()` with replace or push
+
+For wizard/multi-step flows where back button should traverse steps, use **push** (the default):
+
+```tsx
+// Wizard step navigation - push so back button works between steps
+// See: src/app/src/pages/redteam/setup/page.tsx
+const updateHash = (newStep: string) => {
+  navigate(`#${newStep}`); // push (default) - intentional
+};
+```
+
+For hash changes that represent in-page state, use replace:
+
+```tsx
+// Tab switch on a detail page - replace to avoid history clutter
+navigate(`#${section}`, { replace: true });
+```
+
+### URL normalization after save
+
+When the URL needs to be updated to include a new ID after a create/save operation (not a user action), use replace:
+
+```tsx
+// After first save, update URL to include new ID without adding history entry
+navigate(`/evals/${newConfigId}`, { replace: true });
+```
+
+## Anti-Patterns
+
+### Pushing in-page state changes (breaks back button)
+
+```tsx
+// WRONG - every filter change adds a history entry
+setSearchParams((params) => {
+  params.set('filter', value);
+  return params;
+});
+
+// WRONG - navigate without replace for state change
+navigate(`?tab=${newTab}`);
+```
+
+### Using raw `useSearchParams` for a single param without validation
+
+```tsx
+// WRONG - no validation, easy to forget { replace: true }
+const [searchParams, setSearchParams] = useSearchParams();
+const tab = searchParams.get('tab');
+const setTab = (v: string) => {
+  setSearchParams((p) => {
+    p.set('tab', v);
+    return p;
+  });
+};
+
+// RIGHT - use the hook instead
+const [tab, setTab] = useSearchParamState('tab', TabSchema, 'overview');
+```
+
+### Using empty strings instead of null
+
+```tsx
+// WRONG - useSearchParamState will throw an invariant error
+setTab('');
+
+// RIGHT - use null to clear a param
+setTab(null);
+```
+
+## Key Files
+
+- `src/app/src/hooks/useSearchParamState.ts` - primary hook (uses replace internally)
+- `src/app/src/pages/eval/components/ResultsView.tsx` - example of correct `{ replace: true }` usage
+- `src/app/src/pages/redteam/setup/page.tsx` - example of intentional push for wizard steps