agents-reverse-engineer: Command for Claude Code

Uses decimal numbering (72.1, 72.2, etc.) to preserve the logical sequence of planned phases while accommodating urgent insertions.

Purpose: Handle urgent work discovered during execution without renumbering entire roadmap.

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

Example: /gsd:insert-phase 72 Fix critical auth bug → after = 72 → description = "Fix critical auth bug"

Validation:

if [ $# -lt 2 ]; then
  echo "ERROR: Both phase number and description required"
  echo "Usage: /gsd:insert-phase <after> <description>"
  echo "Example: /gsd:insert-phase 72 Fix critical auth bug"
  exit 1
fi

Parse first argument as integer:

after_phase=$1
shift
description="$*"

# Validate after_phase is an integer
if ! [[ "$after_phase" =~ ^[0-9]+$ ]]; then
  echo "ERROR: Phase number must be an integer"
  exit 1
fi

if [ -f .planning/ROADMAP.md ]; then
  ROADMAP=".planning/ROADMAP.md"
else
  echo "ERROR: No roadmap found (.planning/ROADMAP.md)"
  exit 1
fi

Read roadmap content for parsing.

1. Search for "### Phase {after_phase}:" heading

2. If not found:

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

   Exit.

3. Verify phase is in current milestone (not completed/archived)

1. Search for all "### Phase {after_phase}.N:" headings
2. Extract decimal suffixes (e.g., for Phase 72: find 72.1, 72.2, 72.3)
3. Find the highest decimal suffix
4. Calculate next decimal: max + 1

Examples:

• Phase 72 with no decimals → next is 72.1
• Phase 72 with 72.1 → next is 72.2
• Phase 72 with 72.1, 72.2 → next is 72.3

Store as: decimal_phase="$(printf "%02d" $after_phase).${next_decimal}"

slug=$(echo "$description" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/-/g' | sed 's/--*/-/g' | sed 's/^-//;s/-$//')

Phase directory name: {decimal-phase}-{slug} Example: 06.1-fix-critical-auth-bug (phase 6 insertion)

phase_dir=".planning/phases/${decimal_phase}-${slug}"
mkdir -p "$phase_dir"

Confirm: "Created directory: $phase_dir"

1. Find insertion point: immediately after Phase {after_phase}'s content (before next phase heading or "---")

2. Insert new phase heading with (INSERTED) marker:

   ### Phase {decimal_phase}: {Description} (INSERTED)
   
   **Goal:** [Urgent work - to be planned]
   **Depends on:** Phase {after_phase}
   **Plans:** 0 plans
   
   Plans:
   - [ ] TBD (run /gsd:plan-phase {decimal_phase} to break down)
   
   **Details:**
   [To be added during planning]
   

3. Write updated roadmap back to file

The "(INSERTED)" marker helps identify decimal phases as urgent insertions.

Preserve all other content exactly (formatting, spacing, other phases).

1. Read .planning/STATE.md
2. Under "## Accumulated Context" → "### Roadmap Evolution" add entry:

   - Phase {decimal_phase} inserted after Phase {after_phase}: {description} (URGENT)
   

If "Roadmap Evolution" section doesn't exist, create it.

Add note about insertion reason if appropriate.