---
phase: 16-flag-translation
plan: 01
subsystem: cli
tags: [clean, config, switch, flag-translation, safety-validation]

# Dependency graph
requires:
  - phase: 15-direct-passthrough
    provides: cmd_*.py handler pattern and dispatch structure
provides:
  - Flag translation handlers for clean, config, switch commands
  - Safety validation for destructive clean operations
  - Intent-based command dispatch for switch
affects: [16-02-tests, 17-branch-restore]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Safety validation before passthrough (clean requires -f/-n)"
    - "Flag syntax translation (--list removal, --local default)"
    - "Intent-based command selection (switch -> goto or bookmark)"

key-files:
  created:
    - cmd_clean.py
    - cmd_config.py
    - cmd_switch.py
  modified:
    - gitsl.py

key-decisions:
  - "Enforce git's safety model for clean (-f or -n required, exit 128 otherwise)"
  - "Filter -d flag for clean since sl purge handles dirs by default"
  - "Default to --local scope for config writes when no scope specified"

patterns-established:
  - "Safety validation pattern: Check required flags before executing destructive commands"
  - "Flag translation pattern: Map git flags to sl equivalents with semantic awareness"
  - "Intent dispatch pattern: Choose different sl commands based on git flag semantics"

# Metrics
duration: 8min
completed: 2026-01-19
---

# Phase 16 Plan 01: Flag Translation Command Handlers Summary

**Three command handlers with flag translation: clean (safety validation + purge), config (--list + --local default), switch (goto/bookmark dispatch)**

## Performance

- **Duration:** 8 min
- **Started:** 2026-01-19T23:30:00Z
- **Completed:** 2026-01-19T23:38:00Z
- **Tasks:** 2
- **Files modified:** 4

## Accomplishments
- Created cmd_clean.py with safety validation enforcing -f or -n requirement (exit 128 otherwise)
- Created cmd_config.py with --list flag translation and --local default for writes
- Created cmd_switch.py with intent-based dispatch (-c creates bookmark, otherwise goto)
- Updated gitsl.py with imports and dispatch routing for all three commands

## Task Commits

Each task was committed atomically:

1. **Task 1: Create 3 command handler files** - `49888c4` (feat)
2. **Task 2: Update gitsl.py dispatch routing** - `9efe62b` (feat)

## Files Created/Modified
- `cmd_clean.py` - Clean handler with safety validation, -n to --print mapping, -f/-d filtering
- `cmd_config.py` - Config handler with --list removal and --local default for writes
- `cmd_switch.py` - Switch handler with -c to bookmark dispatch, default to goto
- `gitsl.py` - Added imports and dispatch cases for clean, config, switch

## Decisions Made
- **Enforced git's safety model for clean:** Rather than passing through to sl purge directly, which has no safety requirement, we enforce git's behavior requiring -f or -n flags. Returns exit code 128 with proper error message.
- **Filter -d flag:** sl purge already handles untracked directory contents by default, so -d is filtered out rather than translated.
- **--local default for config writes:** When setting a value without a scope flag, --local is added to match git's default behavior.

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- All three command handlers are functional and tested
- Ready for 16-02 E2E tests to validate command translations
- Clean safety model properly enforced (critical for data safety)

---
*Phase: 16-flag-translation*
*Completed: 2026-01-19*
