🐱 [just] v4.0 adds PR update recipes

.github/CONTRIBUTING.md

@@ -66,8 +66,10 @@ Available recipes:
     [Process]
     branch branchname   # start a new branch
     merge               # merge PR and return to starting point
-    pr                  # PR create 3.8
+    pr                  # PR create v4.0
     pr_checks           # watch GHAs then check for Copilot suggestions
+    pr_update           # update the Done section of PR description with current commits
+    pr_verify           # add or append to Verify section from stdin
     prweb               # view PR in web browser
     release rel_version # make a release
     sync                # escape from branch, back to starting point

.just/RELEASE_NOTES.md

@@ -4,6 +4,36 @@ This file tracks the evolution of the Git/GitHub workflow automation module.
 
 ## November 2025 - The Polish Updates
 
+### v4.0 - PR Description Management (#44)
+
+Added two new recipes for managing pull request descriptions dynamically:
+
+- **`pr_update`** - Updates the "Done" section of the PR description with the
+  current list of commits from the branch. Extracts commits using `git cherry`,
+  preserves other sections (Meta, Verify, etc.), and updates the PR body via
+  `gh pr edit`. Useful when you add commits after PR creation and want to keep
+  the description in sync.
+
+- **`pr_verify`** - Adds or appends content to a "Verify" section in the PR
+  description. Reads from stdin, timestamps each entry, and formats as a code
+  block. If no Verify section exists, creates one before the Meta section. If
+  one exists, appends new timestamped entries. Perfect for logging test results
+  or verification steps.
+
+Both recipes include a new sanity check (`_on_a_pull_request`) that verifies
+you're on a branch with an active pull request before attempting updates. This
+prevents cryptic errors when running these commands outside of PR context.
+
+Other improvements in this release:
+
+- Simplified bash strict mode settings (removed `-x` tracing flag)
+- Standardized PR existence checks across recipes
+- Better error handling with exit code 103 for missing PRs
+- Initialize awk variables properly to avoid undefined behavior
+- Updated documentation to show new recipes
+
+**Related PRs:** [#44](https://github.com/fini-net/template-repo/pull/44)
+
 ### v3.9 - Shellcheck Error Fixes (#40)
 
 Before adding the shellcheck tooling in v3.8bis, we knew there were a bunch of

.just/gh-process.just

@@ -13,12 +13,11 @@ sync:
     git pull
     git status --porcelain # stp
 
-# PR create v3.9
+# PR create v4.0
 [group('Process')]
 pr: _has_commits && pr_checks
     #!/usr/bin/env bash
-    set -euxo pipefail # strict mode
-    set +x # leave tracing off...
+    set -euo pipefail # strict mode
 
     # handle optional pre-pr hook (for things like hugo)
     if [[ -e ".just/pr-hook.just" ]]; then
@@ -122,6 +121,18 @@ _main_branch:
         exit 102
     fi
 
+# error if not on a branch with a pull request
+[group('sanity check')]
+[no-cd]
+_on_a_pull_request: _on_a_branch
+    #!/bin/bash
+    set -euo pipefail # strict mode
+
+    if \! gh pr view &>/dev/null; then
+        echo "No PR found for current branch"
+        exit 103
+    fi
+
 # print UTC date in ISO format
 [group('Utility')]
 [no-cd]
@@ -135,7 +146,7 @@ release rel_version:
 
 # watch GHAs then check for Copilot suggestions
 [group('Process')]
-pr_checks:
+pr_checks: _on_a_pull_request
     #!/usr/bin/env bash
 
     gh pr checks --watch -i 5
@@ -177,3 +188,132 @@ pr_checks:
     # did Claude comment?
     echo -e "\n\n🟧🟠🔶🔸 Claude:"
     gh pr view --json comments --jq '[.comments[] | select(.author.login == "claude")] | last | .body'
+
+# update the Done section of PR description with current commits
+[group('Process')]
+pr_update: _on_a_pull_request
+    #!/usr/bin/env bash
+    set -euo pipefail # strict mode
+
+    CURRENT_BRANCH="$(git rev-parse --abbrev-ref HEAD)"
+
+    # get current PR body
+    bodyfile=$(mktemp /tmp/justfile.XXXXXX)
+    gh pr view --json body --jq '.body' > "$bodyfile"
+
+    # create new Done section
+    new_done_section=$(mktemp /tmp/justfile.XXXXXX)
+    {
+        echo "## Done"
+        echo ""
+        git cherry -v "{{ release_branch }}" "$CURRENT_BRANCH" | sed -e 's/^[+] [0-9a-f]* /- /'
+        echo ""
+    } > "$new_done_section"
+
+    # extract everything after Done section (preserve other sections)
+    other_sections=$(mktemp /tmp/justfile.XXXXXX)
+    awk '/^## Done/,/^## / {if (/^## / && !/^## Done/) {found=1}} found {print}' "$bodyfile" > "$other_sections"
+
+    # if no other sections found after Done, preserve everything after Done
+    if [ ! -s "$other_sections" ]; then
+        # look for content after the Done section's commit list
+        awk 'BEGIN {in_done=0; after_done=0; empty_count=0}
+             /^## Done/ {in_done=1; next}
+             in_done && /^$/ {empty_count++; if (empty_count >= 2) after_done=1; next}
+             in_done && /^- / {next}
+             after_done {print}' "$bodyfile" > "$other_sections"
+    fi
+
+    # combine new Done section with preserved sections
+    updated_body=$(mktemp /tmp/justfile.XXXXXX)
+    cat "$new_done_section" "$other_sections" > "$updated_body"
+
+    echo ''
+    cat "$updated_body"
+    echo ''
+
+    # update PR body
+    gh pr edit --body-file "$updated_body"
+
+    # cleanup
+    rm "$bodyfile" "$new_done_section" "$other_sections" "$updated_body"
+
+# add or append to Verify section from stdin
+[group('Process')]
+pr_verify: _on_a_pull_request
+    #!/usr/bin/env bash
+    set -euo pipefail # strict mode
+
+    # read stdin into a temp file
+    stdin_content=$(mktemp /tmp/justfile.XXXXXX)
+    cat > "$stdin_content"
+
+    # get current PR body
+    bodyfile=$(mktemp /tmp/justfile.XXXXXX)
+    gh pr view --json body --jq '.body' > "$bodyfile"
+
+    # get current datetime
+    DATETIME=$(date '+%Y-%m-%d %H:%M:%S %Z')
+
+    # check if Verify section exists
+    if grep -q '^## Verify' "$bodyfile"; then
+        # append to existing Verify section
+        updated_body=$(mktemp /tmp/justfile.XXXXXX)
+        awk -v datetime="$DATETIME" '
+            /^## Verify/ {
+                in_verify=1
+                print
+                next
+            }
+            /^## / && in_verify {
+                # found next section, insert content before it
+                print ""
+                print "### " datetime
+                print ""
+                print "```"
+                system("cat '"$stdin_content"'")
+                print "```"
+                print ""
+                in_verify=0
+            }
+            { print }
+            END {
+                # if still in verify section at end, append content
+                if (in_verify) {
+                    print ""
+                    print "### " datetime
+                    print ""
+                    print "```"
+                    system("cat '"$stdin_content"'")
+                    print "```"
+                }
+            }
+        ' "$bodyfile" > "$updated_body"
+    else
+        # create new Verify section before Meta section
+        updated_body=$(mktemp /tmp/justfile.XXXXXX)
+        awk -v datetime="$DATETIME" '
+            /^## Meta/ {
+                # insert Verify section before Meta
+                print "## Verify"
+                print ""
+                print "### " datetime
+                print ""
+                print "```"
+                system("cat '"$stdin_content"'")
+                print "```"
+                print ""
+            }
+            { print }
+        ' "$bodyfile" > "$updated_body"
+    fi
+
+    echo ''
+    cat "$updated_body"
+    echo ''
+
+    # update PR body
+    gh pr edit --body-file "$updated_body"
+
+    # cleanup
+    rm "$stdin_content" "$bodyfile" "$updated_body"