Truncate GitHub issue titles to prevent ValueTooLong error (#8370) (#8416)

The github_issues.title column is VARCHAR(255) but GitHub issue titles
can exceed that length, causing ActiveRecord::ValueTooLong errors.
Truncate to 255 characters before saving.

Also update /fix skill to use local worktrees/ directory and add it
to .gitignore.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: iHiD

.claude/skills/fix/SKILL.md

@@ -67,6 +67,7 @@ Only create the worktree **after the plan is approved**. The issue number has be
 
 ```bash
 git pull --ff-only origin main
+mkdir -p worktrees
 git worktree add worktrees/fix-<issue-number> -b fix/<issue-number>
 cd worktrees/fix-<issue-number>
 ```
@@ -78,7 +79,7 @@ ln -s /Users/iHiD/Code/exercism/website/node_modules node_modules
 ln -s /Users/iHiD/Code/exercism/website/.husky/_ .husky/_
 ```
 
-**Important:** After creating the worktree, `cd` into it immediately. All subsequent work (file edits, bash commands, tests) happens inside the worktree. The main repo stays untouched on its current branch.
+**CRITICAL:** You MUST `cd` into the worktree immediately after creating it. All subsequent work — file reads, edits, bash commands, tests — MUST happen from inside the worktree directory using `cd worktrees/fix-<issue-number> && <command>` on every Bash call. Do NOT use absolute paths to the worktree from the main repo. The main repo stays untouched on its current branch.
 
 ### Step 4: Implement the fix
 
@@ -138,6 +139,6 @@ cd /Users/iHiD/Code/exercism/website
 git worktree remove worktrees/fix-<issue-number>
 ```
 
-This removes the worktree directory and returns you to the main repo. The branch remains on the remote for the PR.
+This removes the worktree directory. The branch remains on the remote for the PR.
 
 Report the PR URL to the user.

.gitignore

@@ -62,3 +62,6 @@ vendor/bundle/
 
 # Claude local settings
 .claude/settings.local.json
+
+# Git worktrees
+worktrees/

app/commands/github/issue/create_or_update.rb

@@ -6,7 +6,7 @@ class Github::Issue::CreateOrUpdate
   def call
     issue = ::Github::Issue.create_or_find_by!(node_id:) do |i|
       i.number = attributes[:number]
-      i.title = attributes[:title]
+      i.title = title
       i.status = status
       i.repo = attributes[:repo]
       i.opened_at = attributes[:opened_at]
@@ -17,7 +17,7 @@ def call
 
     issue.update!(
       number: attributes[:number],
-      title: attributes[:title],
+      title:,
       status:,
       repo: attributes[:repo],
       opened_at: attributes[:opened_at],
@@ -35,6 +35,7 @@ def labels(issue)
     end
   end
 
+  def title = attributes[:title].to_s.truncate(255)
   def status = attributes[:state].downcase.to_sym
 
   def log_metric!(issue)

test/commands/github/issue/create_or_update_test.rb

@@ -67,6 +67,23 @@ class Github::Issue::CreateOrUpdateTest < ActiveSupport::TestCase
     assert_nil issue.opened_by_username
   end
 
+  test "truncates title longer than 255 characters" do
+    long_title = "a" * 300
+
+    issue = Github::Issue::CreateOrUpdate.(
+      "MDU6SXNzdWU3MjM2MjUwMTI=",
+      number: 999,
+      title: long_title,
+      state: "OPEN",
+      repo: "exercism/ruby",
+      labels: [],
+      opened_at: Time.parse("2020-10-17T02:39:37Z").utc,
+      opened_by_username: "SleeplessByte"
+    )
+
+    assert_equal 255, issue.title.length
+  end
+
   test "update issue if data has changed" do
     issue = create :github_issue