feat(prompts): add versioning and last amended information to prompt files

Author: stefaniuk

.github/prompts/speckit.implement.prompt.md

@@ -33,3 +33,8 @@ Before marking implementation as complete, verify:
 - [ ] All `### Show & Tell` steps executed successfully for each phase
 - [ ] Repository-template capabilities are present and up to date (see [.github/skills/repository-template/SKILL.md](/.github/skills/repository-template/SKILL.md))
 - [ ] `make lint` and `make test` complete with zero errors and zero warnings
+
+---
+
+> **Version**: 1.5.1
+> **Last Amended**: 2026-01-21

.github/prompts/speckit.plan.prompt.md

@@ -29,7 +29,7 @@ Before marking `plan.md` as complete, verify:
 
 - [ ] Plan addresses all requirements from `spec.md`
 - [ ] All architectural decisions have corresponding ADRs
-- [ ] Toolchain versions are specified
+- [ ] Toolchain versions are specified, verified online during planning, and confirmed as the latest stable releases
 - [ ] Repository-template capabilities are planned using the skill at [.github/skills/repository-template/SKILL.md](/.github/skills/repository-template/SKILL.md), including at minimum:
   - [ ] Core Make System
   - [ ] Pre-commit Hooks
@@ -40,3 +40,8 @@ Before marking `plan.md` as complete, verify:
   - [ ] Tool Version Management
 - [ ] Each phase and user story includes a `### Show & Tell` subsection
 - [ ] Show & Tell subsections are placed at the end of each phase or user story
+
+---
+
+> **Version**: 1.5.1
+> **Last Amended**: 2026-01-21

.github/prompts/speckit.tasks.prompt.md

@@ -53,3 +53,8 @@ Before marking `tasks.md` as complete, verify:
 - [ ] Test tasks are listed before their corresponding implementation tasks
 - [ ] Each phase and user story ends with a task that runs `make lint` and `make test`
 - [ ] Each phase and user story includes a `### Show & Tell` subsection with executable steps
+
+---
+
+> **Version**: 1.5.1
+> **Last Amended**: 2026-01-21

.specify/extensions/prompts/speckit.implement.prompt.ext.md

@@ -29,3 +29,8 @@ Before marking implementation as complete, verify:
 - [ ] All `### Show & Tell` steps executed successfully for each phase
 - [ ] Repository-template capabilities are present and up to date (see [.github/skills/repository-template/SKILL.md](/.github/skills/repository-template/SKILL.md))
 - [ ] `make lint` and `make test` complete with zero errors and zero warnings
+
+---
+
+> **Version**: 1.5.1
+> **Last Amended**: 2026-01-21

.specify/extensions/prompts/speckit.plan.prompt.ext.md

@@ -36,3 +36,8 @@ Before marking `plan.md` as complete, verify:
   - [ ] Tool Version Management
 - [ ] Each phase and user story includes a `### Show & Tell` subsection
 - [ ] Show & Tell subsections are placed at the end of each phase or user story
+
+---
+
+> **Version**: 1.5.1
+> **Last Amended**: 2026-01-21

.specify/extensions/prompts/speckit.tasks.prompt.ext.md

@@ -49,3 +49,8 @@ Before marking `tasks.md` as complete, verify:
 - [ ] Test tasks are listed before their corresponding implementation tasks
 - [ ] Each phase and user story ends with a task that runs `make lint` and `make test`
 - [ ] Each phase and user story includes a `### Show & Tell` subsection with executable steps
+
+---
+
+> **Version**: 1.5.1
+> **Last Amended**: 2026-01-21

scripts/patch-speckit.sh

@@ -184,11 +184,24 @@ function patch-file() {
 
   local upstream_content
   local extension_content
+  local extension_body
+  local extension_footer
   local patched_content
 
   upstream_content=$(cat "$upstream_file")
   extension_content=$(cat "$ext_file")
-  patched_content=$(inject-extension "$upstream_content" "$extension_content" "$injection_point")
+
+  # Separate extension body from footer (footer starts with --- followed by version block)
+  extension_body=$(extract-extension-body "$extension_content")
+  extension_footer=$(extract-extension-footer "$extension_content")
+
+  # Inject extension body at the configured location
+  patched_content=$(inject-extension "$upstream_content" "$extension_body" "$injection_point")
+
+  # Append footer at the very end if present
+  if [[ -n "$extension_footer" ]]; then
+    patched_content=$(append-footer "$patched_content" "$extension_footer")
+  fi
 
   echo "$patched_content" > "$target_file"
 
@@ -452,6 +465,134 @@ function inject-prepend() {
   return 0
 }
 
+# Extract the body of an extension file (everything before the footer).
+# The footer is identified by a line containing only "---" followed by
+# lines starting with "> **Version**:" and "> **Last Amended**:".
+# Arguments:
+#   $1=[extension content]
+# Returns:
+#   Extension body without footer (via stdout)
+function extract-extension-body() {
+  local content="$1"
+  local result=""
+  local footer_start_line=""
+  local line_num=0
+  local lines=()
+
+  # Read content into array
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    lines+=("$line")
+  done <<< "$content"
+
+  local total_lines=${#lines[@]}
+
+  # Scan backwards to find footer pattern: --- followed by Version and Last Amended
+  local i=$((total_lines - 1))
+  while [[ $i -ge 0 ]]; do
+    local line="${lines[$i]}"
+    if [[ "$line" == "---" ]]; then
+      # Check if following lines match footer pattern
+      local next_idx=$((i + 1))
+      if [[ $next_idx -lt $total_lines ]]; then
+        local next_line="${lines[$next_idx]}"
+        if [[ "$next_line" =~ ^\>\ \*\*Version\*\*: ]]; then
+          footer_start_line=$i
+          break
+        fi
+      fi
+    fi
+    ((i--))
+  done
+
+  # Output body (everything before footer)
+  if [[ -n "$footer_start_line" ]]; then
+    # Remove trailing blank lines before footer
+    local end_idx=$((footer_start_line - 1))
+    while [[ $end_idx -ge 0 ]] && [[ -z "${lines[$end_idx]}" ]]; do
+      ((end_idx--))
+    done
+    for ((j = 0; j <= end_idx; j++)); do
+      result+="${lines[$j]}"$'\n'
+    done
+  else
+    # No footer found, return entire content
+    result="$content"$'\n'
+  fi
+
+  # Remove trailing newline
+  result="${result%$'\n'}"
+  echo "$result"
+
+  return 0
+}
+
+# Extract the footer from an extension file.
+# The footer is identified by a line containing only "---" followed by
+# lines starting with "> **Version**:" and "> **Last Amended**:".
+# Arguments:
+#   $1=[extension content]
+# Returns:
+#   Footer content (via stdout), empty if no footer found
+function extract-extension-footer() {
+  local content="$1"
+  local result=""
+  local footer_start_line=""
+  local lines=()
+
+  # Read content into array
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    lines+=("$line")
+  done <<< "$content"
+
+  local total_lines=${#lines[@]}
+
+  # Scan backwards to find footer pattern: --- followed by Version and Last Amended
+  local i=$((total_lines - 1))
+  while [[ $i -ge 0 ]]; do
+    local line="${lines[$i]}"
+    if [[ "$line" == "---" ]]; then
+      # Check if following lines match footer pattern
+      local next_idx=$((i + 1))
+      if [[ $next_idx -lt $total_lines ]]; then
+        local next_line="${lines[$next_idx]}"
+        if [[ "$next_line" =~ ^\>\ \*\*Version\*\*: ]]; then
+          footer_start_line=$i
+          break
+        fi
+      fi
+    fi
+    ((i--))
+  done
+
+  # Output footer if found
+  if [[ -n "$footer_start_line" ]]; then
+    for ((j = footer_start_line; j < total_lines; j++)); do
+      result+="${lines[$j]}"$'\n'
+    done
+  fi
+
+  # Remove trailing newline
+  result="${result%$'\n'}"
+  echo "$result"
+
+  return 0
+}
+
+# Append footer to the end of patched content.
+# Arguments:
+#   $1=[patched content]
+#   $2=[footer content]
+# Returns:
+#   Content with footer appended (via stdout)
+function append-footer() {
+  local content="$1"
+  local footer="$2"
+
+  echo "${content}"$'\n'$'\n'"${footer}"
+
+  return 0
+}
+
 # ==============================================================================
 
 # Check if an argument is truthy (true, yes, y, on, 1).