Files changed

• .milkyflow/agents/developer/answers/EPIC_1_US_3/
• src/backup_cockpit/raw_capture/artifact/
• src/backup_cockpit/raw_capture/domain/errors.py
• tests/unit/test_artifact_encryption.py

Briefing

You are the Coder Agent.

Based on the rules you must follow in the file .milkyflow/agents/developer/rules_coding_agent.md,
execute exactly one coding task: the task described in
'.milkyflow/agents/developer/prompts/EPIC_1_US_3/1_ARTIFACT_ENCRYPTION_MODULE.md'.

Read the mandatory files listed in the prompt before writing any code. Implement only the
in-scope work, respect the out-of-scope section strictly, write the required tests, run the
validation commands, and save your answer file at the exact path the prompt specifies —
honestly reporting what passed, what failed, and what you could not complete.

Never run git commands. Never edit any README.md. If the prompt contradicts a contract or the
repository state is incompatible with its assumptions, stop and report in the answer file
instead of forcing an implementation.

Output

● Read the task prompt (shell)
  │ cat /home/oem/Documents/Sandbox/Kody/Projects/Backupper/.milkyflow/agents/developer/prompts/EPIC
  │ _1_US_3/1_ARTIFACT_ENCRYPTION_MODULE.md
  └ 251 lines…

● Read coding agent rules (shell)
  │ cat /home/oem/Documents/Sandbox/Kody/Projects/Backupper/.milkyflow/agents/developer/rules_coding
  │ _agent.md
  └ 193 lines…

Now let me read the mandatory files:

● Read domain errors (shell)
  │ cat /home/oem/Documents/Sandbox/Kody/Projects/Backupper/src/backup_cockpit/raw_capture/domain/er
  │ rors.py
  └ 45 lines…

● Read credentials provider (shell)
  │ cat /home/oem/Documents/Sandbox/Kody/Projects/Backupper/src/backup_cockpit/raw_capture/credentia
  │ ls/provider.py
  └ 159 lines…

● Check cryptography dependency (shell)
  │ grep -n "cryptography" /home/oem/Documents/Sandbox/Kody/Projects/Backupper/pyproject.toml
  └ 2 lines…

● Read orchestrator (shell)
  │ cat /home/oem/Documents/Sandbox/Kody/Projects/Backupper/src/backup_cockpit/raw_capture/capture/o
  │ rchestrator.py
  └ 240 lines…

Now I have all the context. Let me implement the required files:

● Create artifact package directory (shell)
  │ mkdir -p
  │ /home/oem/Documents/Sandbox/Kody/Projects/Backupper/src/backup_cockpit/raw_capture/artifact
  └ 1 line…

● Create __init__.py +8
  └ src/backup_cockpit/raw_capture/artifact/__init__.py

● Create encryption.py +233
  └ src/backup_cockpit/raw_capture/artifact/encryption.py

Now add `ArtifactEncryptionError` to the domain errors file:

● Edit errors.py +5
  └ src/backup_cockpit/raw_capture/domain/errors.py

Now create the tests file:

● Create test_artifact_encryption.py +230
  └ tests/unit/test_artifact_encryption.py

Now run the validation commands:

● Sync dev dependencies (shell)
  │ uv sync --dev 2>&1 | tail -5
  └ 3 lines…

● Run tests (shell)
  │ .venv/bin/pytest tests/unit/test_artifact_encryption.py -v 2>&1
  └ 11 lines…

All 11 tests pass. Now run ruff, mypy, and bandit:

● Ruff lint (shell)
  │ .venv/bin/ruff check src/backup_cockpit/raw_capture/artifact/
  │ tests/unit/test_artifact_encryption.py 2>&1
  └ 61 lines…

● Bandit security scan (shell)
  │ .venv/bin/bandit -r src/backup_cockpit/raw_capture/artifact/ 2>&1
  └ 28 lines…

● Mypy type check (shell)
  │ .venv/bin/mypy src/backup_cockpit/raw_capture/artifact/ 2>&1
  └ 2 lines…

Need to fix ruff issues — long docstring lines and unused import:

● Edit encryption.py +5 -4
  └ src/backup_cockpit/raw_capture/artifact/encryption.py

● Edit encryption.py +2 -1
  └ src/backup_cockpit/raw_capture/artifact/encryption.py

● Edit encryption.py +2 -1
  └ src/backup_cockpit/raw_capture/artifact/encryption.py

● Edit encryption.py +4 -1
  └ src/backup_cockpit/raw_capture/artifact/encryption.py

● Edit test_artifact_encryption.py -1
  └ tests/unit/test_artifact_encryption.py

● Ruff lint after fixes (shell)
  │ .venv/bin/ruff check src/backup_cockpit/raw_capture/artifact/
  │ tests/unit/test_artifact_encryption.py 2>&1
  └ 2 lines…

Now re-run the full suite to confirm all still pass:

● Final test run (shell)
  │ .venv/bin/pytest tests/unit/test_artifact_encryption.py -v 2>&1
  └ 11 lines…

All validation passes. Now create the answer file and history entry:

● Create answer directory (shell)
  │ mkdir -p /home/oem/Documents/Sandbox/Kody/Projects/Backupper/.milkyflow/agents/developer/answers
  │ /EPIC_1_US_3
  └ 1 line…

● Create 1_ARTIFACT_ENCRYPTION_MODULE.md +117
  └ .milkyflow/agents/developer/answers/EPIC_1_US_3/1_ARTIFACT_ENCRYPTION_MODULE.md

Now append the history row:

● Append history row (shell)
  │ HISTORY=/home/oem/Documents/Sandbox/Kody/Projects/Backupper/.milkyflow/agents/history.md
  │ if [ ! -f "$HISTORY" ]; then
  │ echo "| Timestamp | Agent | Scenario | Details |" >> "$HISTORY"
  │ echo "|-----------|-------|----------|---------|" >> "$HISTORY"
  │ fi…
  └ 4 lines…

All done. Here's the summary:

## ✅ Task Complete — ARTIFACT_ENCRYPTION_MODULE

**All 11 tests pass. All validators clean.**

### Files created/modified
| Action | Path |
|--------|------|
| CREATE | `src/backup_cockpit/raw_capture/artifact/__init__.py` |
| CREATE | `src/backup_cockpit/raw_capture/artifact/encryption.py` |
| MODIFY | `src/backup_cockpit/raw_capture/domain/errors.py` |
| CREATE | `tests/unit/test_artifact_encryption.py` |
| CREATE | `.milkyflow/agents/developer/answers/EPIC_1_US_3/1_ARTIFACT_ENCRYPTION_MODULE.md` |

### Validation results
| Command | Result |
|---------|--------|
| `pytest tests/unit/test_artifact_encryption.py -v` | ✅ 11/11 passed |
| `ruff check ...` | ✅ All checks passed |
| `mypy src/.../artifact/` | ✅ No issues |
| `bandit -r src/.../artifact/` | ✅ No issues |





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