agents-reverse-engineer: Command for Claude Code

Purpose: Clean removal of work you've decided not to do, without polluting context with cancelled/deferred markers. Output: Phase deleted, all subsequent phases renumbered, git commit as historical record.

<execution_context> @.planning/ROADMAP.md @.planning/STATE.md </execution_context>

If no argument provided:

ERROR: Phase number required
Usage: /gsd:remove-phase <phase-number>
Example: /gsd:remove-phase 17

Exit.

cat .planning/STATE.md 2>/dev/null
cat .planning/ROADMAP.md 2>/dev/null

Parse current phase number from STATE.md "Current Position" section.

1. Search for ### Phase {target}: heading

2. If not found:

   ERROR: Phase {target} not found in roadmap
   Available phases: [list phase numbers]
   

   Exit.

1. Compare target phase to current phase from STATE.md
2. Target must be > current phase number

If target <= current phase:

ERROR: Cannot remove Phase {target}

Only future phases can be removed:
- Current phase: {current}
- Phase {target} is current or completed

To abandon current work, use /gsd:pause-work instead.

Exit.

1. Check for SUMMARY.md files in phase directory:

ls .planning/phases/{target}-*/*-SUMMARY.md 2>/dev/null

If any SUMMARY.md files exist:

ERROR: Phase {target} has completed work

Found executed plans:
- {list of SUMMARY.md files}

Cannot remove phases with completed work.

Exit.

1. Extract phase name from ROADMAP.md heading: ### Phase {target}: {Name}
2. Find phase directory: .planning/phases/{target}-{slug}/
3. Find all subsequent phases (integer and decimal) that need renumbering

Subsequent phase detection:

For integer phase removal (e.g., 17):

• Find all phases > 17 (integers: 18, 19, 20...)
• Find all decimal phases >= 17.0 and < 18.0 (17.1, 17.2...) → these become 16.x
• Find all decimal phases for subsequent integers (18.1, 19.1...) → renumber with their parent

For decimal phase removal (e.g., 17.1):

• Find all decimal phases > 17.1 and < 18 (17.2, 17.3...) → renumber down
• Integer phases unchanged

List all phases that will be renumbered.

Removing Phase {target}: {Name}

This will:
- Delete: .planning/phases/{target}-{slug}/
- Renumber {N} subsequent phases:
  - Phase 18 → Phase 17
  - Phase 18.1 → Phase 17.1
  - Phase 19 → Phase 18
  [etc.]

Proceed? (y/n)

Wait for confirmation.

if [ -d ".planning/phases/{target}-{slug}" ]; then
  rm -rf ".planning/phases/{target}-{slug}"
  echo "Deleted: .planning/phases/{target}-{slug}/"
fi

If directory doesn't exist, note: "No directory to delete (phase not yet created)"

For each phase directory that needs renumbering (in reverse order to avoid conflicts):

# Example: renaming 18-dashboard to 17-dashboard
mv ".planning/phases/18-dashboard" ".planning/phases/17-dashboard"

Process in descending order (20→19, then 19→18, then 18→17) to avoid overwriting.

Also rename decimal phase directories:

• 17.1-fix-bug → 16.1-fix-bug (if removing integer 17)
• 17.2-hotfix → 17.1-hotfix (if removing decimal 17.1)