# BRIEFING — 2026-09-05T10:30:48Z

## Mission
Investigate system architecture, workspace structure, Python environment, PyInstaller packaging constraints, SQLite persistence, and build automation to formulate concrete recommendations for the standalone Windows .exe HAD Digital MVP.

## 🔒 My Identity
- Archetype: explorer
- Roles: explorer_survey_2
- Working directory: c:\AI Projects\Kais Project\.agents\explorer_survey_2
- Original parent: 8c700e5d-87a4-4452-ab59-6fc2e8946b0d
- Milestone: MVP Architecture & Packaging Survey

## 🔒 Key Constraints
- Read-only investigation — do NOT implement production source code
- Files for content delivery (reports, handoffs), messages for coordination
- Handoff report strictly follows 5 components: Observation, Logic Chain, Caveats, Conclusion, Verification Method
- Standalone Windows .exe requirement with zero host dependencies
- Embedded SQLite persistence separate from ephemeral _MEIPASS bundle

## Current Parent
- Conversation ID: 8c700e5d-87a4-4452-ab59-6fc2e8946b0d
- Updated: 2026-09-05T10:38:00Z

## Investigation State
- **Explored paths**: `ORIGINAL_REQUEST.md`, `DISPATCH.md`, `MVP/`, `01_System/`, `03_Architecture/`, `04_Build/`, `05_Test/`, `00_Governance framework/`, `MVP_PLAN.md`, `MVP_EXECUTION_PLAN.md`
- **Key findings**:
  1. Complete pure-Python prototype exists in `MVP/` using `http.server.BaseHTTPRequestHandler` and SQLite WAL.
  2. Fatal PyInstaller `_MEIPASS` data-loss risk identified: `config_manager.py` places SQLite database inside ephemeral temp directory unless decoupled into persistent storage.
  3. UI login defect found in `static/app.js` line 81: checks `data.ok` while `app.py` returns `{"message": "Login successful", "user": ...}`, displaying "Login failed" on valid logins.
  4. Demo credentials in `app.js` do not match `seed_demo.py` accounts.
  5. Report submission payload structure mismatch between `app.js` (multi-symptom dict) and `app.py` (single symptom fields).
  6. PyInstaller spec was `--onedir`, not single-file `--onefile`.
- **Unexplored areas**: None. Complete survey achieved.

## Key Decisions Made
- Recommended Python standard library `ThreadingHTTPServer` over Flask: zero host dependencies, zero virtualenv overhead, native PyInstaller bundling.
- Designed decoupled storage: `get_bundle_dir()` for read-only static assets, `get_data_dir()` for persistent SQLite database.
- Implemented and verified standalone verification suite (`proposed_verify.py`): 8/8 tests passed.
- Implemented build automation script (`proposed_build.py`) and PyInstaller onefile spec (`proposed_HAD_Digital_onefile.spec`).
- Produced comprehensive handoff report (`handoff.md`) and unified patch (`proposed_patches.patch`).

## Artifact Index
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\DISPATCH.md` — Received dispatch instructions
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\BRIEFING.md` — Agent briefing & working memory
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\progress.md` — Liveness & progress tracking
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\handoff.md` — Final comprehensive handoff report
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\proposed_build.py` — Build automation script
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\proposed_verify.py` — Programmatic verification test runner
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\proposed_HAD_Digital_onefile.spec` — PyInstaller single-file spec
- `c:\AI Projects\Kais Project\.agents\explorer_survey_2\proposed_patches.patch` — Unified diff patch