---
phase: 02-env-audit-and-cli-polish
plan: 01
subsystem: cli
tags: [flag-parsing, dry-run, check-mode, cli-ux]
dependency_graph:
  requires: []
  provides: [SKIP_AUDIT, DRY_RUN, CHECK_MODE, CLAUDE_ARGS]
  affects: [02-02]
tech_stack:
  added: []
  patterns: [while-shift-flag-parsing, early-exit-modes]
key_files:
  modified: [claudebox.sh]
decisions:
  - "export SKIP_AUDIT to satisfy shellcheck SC2034 (unused variable) since Plan 02 consumes it"
metrics:
  duration: 2min
  completed: "2026-04-09T15:11:34Z"
  tasks: 3
  files: 1
---

# Phase 02 Plan 01: Flag Parsing and CLI Modes Summary

Refactored claudebox flag parsing from single-flag for/shift/break to multi-flag while/shift with CLAUDE_ARGS accumulator, then added --check and --dry-run early-exit diagnostic modes.

## Completed Tasks

| # | Task | Commit | Key Changes |
|---|------|--------|-------------|
| 1 | Refactor flag parsing to while/shift with CLAUDE_ARGS | `07096ae` | Replaced for-loop with while/shift, added SKIP_AUDIT/DRY_RUN/CHECK_MODE flags, CLAUDE_ARGS accumulator |
| 2 | Add --dry-run mode | `3903667` | Prints full bwrap command with all env and mount flags to stderr, exits 0 |
| 3 | Add --check mode | `cc6bd5b` | Verifies bwrap/claude/git/curl/nix binaries, ~/.claudebox dir, ANTHROPIC_API_KEY presence |

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] shellcheck SC2034 for SKIP_AUDIT**
- **Found during:** Task 3 (nix build verification)
- **Issue:** shellcheck flagged SKIP_AUDIT as unused since Plan 02 hasn't consumed it yet
- **Fix:** Added `export SKIP_AUDIT` after flag parsing loop with comment noting Plan 02 dependency
- **Files modified:** claudebox.sh
- **Commit:** `cc6bd5b`

## Verification Results

- `grep -c CLAUDE_ARGS claudebox.sh` returns 5 (declaration + 2 accumulations + 2 usages)
- All three flag variables (SKIP_AUDIT, DRY_RUN, CHECK_MODE) present in claudebox.sh
- `nix build` succeeds (shellcheck validation passes)

## Threat Surface Scan

T-02-02 mitigated: --check mode only tests `[[ -v ANTHROPIC_API_KEY ]]` for presence, never prints the value.

## Self-Check: PASSED