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+## Pre-Feature Development Project Tree
+
+```bash
+.
+├── AGENTS.md
+├── CHANGELOG.md
+├── Dockerfile
+├── Makefile
+├── README.md
+├── deployment
+│   ├── after-install.sh
+│   └── appspec.yml
+├── docker-compose.yml
+├── extract_tests.ts
+├── getTestList.sh
+├── jest.config.js
+├── keys
+├── package.json
+├── src
+│   ├── @appquality-wp-auth.d.ts
+│   ├── __mocks__
+│   ├── app.ts
+│   ├── avatar-initials.d.ts
+│   ├── config.ts
+│   ├── constants.ts
+│   ├── features
+│   ├── index.ts
+│   ├── middleware
+│   ├── parse-comments.d.ts
+│   ├── php-unserialize.d.ts
+│   ├── reference
+│   ├── routes
+│   ├── schema.ts
+│   └── types.d.ts
+├── test-codex.sh
+├── tsconfig.json
+└── yarn.lock
+```
+
+## Relevant Files
+
+- `src/routes/users/me/campaigns/_get/index.ts` - Endpoint for listing campaigns
+- `src/features/db/class/Campaigns.ts` - Database class for campaign logic
+- `src/features/db/class/CustomUserFieldData.ts` - Access tester CUF values
+
+### Proposed New Files
+
+- `src/routes/users/me/campaigns/_get/cuf.spec.ts` - Unit tests for CUF-based visibility
+
+### Existing Files Modified
+
+- `src/routes/users/me/campaigns/_get/index.ts` - Filter campaigns by CUF rules
+- `src/features/db/class/Campaigns.ts` - Retrieve CUF rules from dossier
+- `src/reference/openapi.yml` - Document CUF visibility behavior
+
+### Notes
+
+- Unit tests live beside their implementation files.
+- Update `CHANGELOG.md` with a summary line of the feature addition.
+- Consider performance when querying CUF values from `@appquality/tryber-database`.
+
+## Tasks
+
+- [ ] 1.0 Retrieve CUF rules from the dossier
+  - [ ] 1.1 Extend `Campaigns.getTargetRules` to query `campaign_dossier_data_cuf`
+  - [ ] 1.2 Map each rule to `{cuf_id, cuf_value_id}`
+- [ ] 2.0 Enforce CUF rules in campaign listing
+  - [ ] 2.1 Fetch tester CUF values using `CustomUserFieldData`
+  - [ ] 2.2 Skip rules referencing missing CUFs
+  - [ ] 2.3 Filter campaigns when tester values do not match
+- [ ] 3.0 Add tests for CUF visibility logic
+  - [ ] 3.1 Create `cuf.spec.ts` covering rule match, mismatch, and missing field cases
+- [ ] 4.0 Update documentation
+  - [ ] 4.1 Describe CUF filtering in `openapi.yml`
+  - [ ] 4.2 Add changelog entry
+_End of document_