fix: normalize phase input at command entry points

Commands accept both padded (08) and unpadded (8) phase numbers.
Normalization happens in step 1/2 before any directory lookups.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

agents/gsd-plan-checker.md

@@ -244,8 +244,9 @@ issue:
 Gather verification context from the phase directory and project state.
 
 ```bash
-# Phase directory (provided in prompt)
-PHASE_DIR=".planning/phases/${PHASE_ARG}"
+# Normalize phase and find directory
+PADDED_PHASE=$(printf "%02d" ${PHASE_ARG} 2>/dev/null || echo "${PHASE_ARG}")
+PHASE_DIR=$(ls -d .planning/phases/${PADDED_PHASE}-* .planning/phases/${PHASE_ARG}-* 2>/dev/null | head -1)
 
 # List all PLAN.md files
 ls "$PHASE_DIR"/*-PLAN.md 2>/dev/null

commands/gsd/plan-phase.md

@@ -37,13 +37,7 @@ Phase number: $ARGUMENTS (optional - auto-detects next unplanned phase if not pr
 - `--gaps` — Gap closure mode (reads VERIFICATION.md, skips research)
 - `--skip-verify` — Skip planner → checker verification loop
 
-Check for existing research and plans:
-
-```bash
-ls .planning/phases/${PHASE}-*/*-RESEARCH.md 2>/dev/null
-ls .planning/phases/${PHASE}-*/*-PLAN.md 2>/dev/null
-```
-
+Normalize phase input in step 2 before any directory lookups.
 </context>
 
 <process>
@@ -56,7 +50,7 @@ ls .planning/ 2>/dev/null
 
 **If not found:** Error - user should run `/gsd:new-project` first.
 
-## 2. Parse Arguments
+## 2. Parse and Normalize Arguments
 
 Extract from $ARGUMENTS:
 
@@ -68,6 +62,24 @@ Extract from $ARGUMENTS:
 
 **If no phase number:** Detect next unplanned phase from roadmap.
 
+**Normalize phase to zero-padded format:**
+
+```bash
+# Normalize phase number (8 → 08, but preserve decimals like 2.1 → 02.1)
+if [[ "$PHASE" =~ ^[0-9]+$ ]]; then
+  PHASE=$(printf "%02d" "$PHASE")
+elif [[ "$PHASE" =~ ^([0-9]+)\.([0-9]+)$ ]]; then
+  PHASE=$(printf "%02d.%s" "${BASH_REMATCH[1]}" "${BASH_REMATCH[2]}")
+fi
+```
+
+**Check for existing research and plans:**
+
+```bash
+ls .planning/phases/${PHASE}-*/*-RESEARCH.md 2>/dev/null
+ls .planning/phases/${PHASE}-*/*-PLAN.md 2>/dev/null
+```
+
 ## 3. Validate Phase
 
 ```bash
@@ -79,14 +91,13 @@ grep -A5 "Phase ${PHASE}:" .planning/ROADMAP.md 2>/dev/null
 ## 4. Ensure Phase Directory Exists
 
 ```bash
-# Match both zero-padded (05-*) and unpadded (5-*) folders
-PADDED_PHASE=$(printf "%02d" ${PHASE})
-PHASE_DIR=$(ls -d .planning/phases/${PADDED_PHASE}-* .planning/phases/${PHASE}-* 2>/dev/null | head -1)
+# PHASE is already normalized (08, 02.1, etc.) from step 2
+PHASE_DIR=$(ls -d .planning/phases/${PHASE}-* 2>/dev/null | head -1)
 if [ -z "$PHASE_DIR" ]; then
-  # Create phase directory from roadmap name with zero-padded phase number
+  # Create phase directory from roadmap name
   PHASE_NAME=$(grep "Phase ${PHASE}:" .planning/ROADMAP.md | sed 's/.*Phase [0-9]*: //' | tr '[:upper:]' '[:lower:]' | tr ' ' '-')
-  mkdir -p ".planning/phases/${PADDED_PHASE}-${PHASE_NAME}"
-  PHASE_DIR=".planning/phases/${PADDED_PHASE}-${PHASE_NAME}"
+  mkdir -p ".planning/phases/${PHASE}-${PHASE_NAME}"
+  PHASE_DIR=".planning/phases/${PHASE}-${PHASE_NAME}"
 fi
 ```
 

commands/gsd/research-phase.md

@@ -26,17 +26,23 @@ Research how to implement a phase. Spawns gsd-phase-researcher agent with phase
 <context>
 Phase number: $ARGUMENTS (required)
 
-Check for existing research:
-```bash
-ls .planning/phases/${PHASE}-*/*RESEARCH.md 2>/dev/null
-```
+Normalize phase input in step 1 before any directory lookups.
 </context>
 
 <process>
 
-## 1. Parse and Validate Phase
+## 1. Normalize and Validate Phase
 
 ```bash
+# Normalize phase number (8 → 08, but preserve decimals like 2.1 → 02.1)
+if [[ "$ARGUMENTS" =~ ^[0-9]+$ ]]; then
+  PHASE=$(printf "%02d" "$ARGUMENTS")
+elif [[ "$ARGUMENTS" =~ ^([0-9]+)\.([0-9]+)$ ]]; then
+  PHASE=$(printf "%02d.%s" "${BASH_REMATCH[1]}" "${BASH_REMATCH[2]}")
+else
+  PHASE="$ARGUMENTS"
+fi
+
 grep -A5 "Phase ${PHASE}:" .planning/ROADMAP.md 2>/dev/null
 ```
 
@@ -118,7 +124,7 @@ Before declaring complete, verify:
 </quality_gate>
 
 <output>
-Write to: .planning/phases/{phase}-{slug}/{phase}-RESEARCH.md
+Write to: .planning/phases/${PHASE}-{slug}/${PHASE}-RESEARCH.md
 </output>
 ```
 
@@ -146,7 +152,7 @@ Continue research for Phase {phase_number}: {phase_name}
 </objective>
 
 <prior_state>
-Research file: @.planning/phases/{phase}-{slug}/{phase}-RESEARCH.md
+Research file: @.planning/phases/${PHASE}-{slug}/${PHASE}-RESEARCH.md
 </prior_state>
 
 <checkpoint_response>