Repository has accumulated 17 obsolete branches that need removal while preserving main.

Changes

Created deletion automation with three execution paths:

• .github/workflows/cleanup-old-branches.yml - Manual-trigger workflow that deletes all 17 branches atomically. Uses exact ref matching (refs/heads/$branch$) to prevent false positives.

• scripts/delete-old-branches.sh - Interactive bash script with confirmation prompt. Lists deleted/failed branches and shows final remote state via git ls-remote.

• docs/BRANCH_CLEANUP.md - Execution guide covering workflow trigger, script usage, and manual GitHub UI deletion.

Branches to Remove

container
copilot/add-ai-chatbot-agent
copilot/add-copilot-seats-view
copilot/add-github-copilot-integration
copilot/add-github-export-tool
copilot/add-team-usage-report-page
copilot/fix-29985769-1145060471-3d22a403-533a-4231-ba2c-189bc9958005
copilot/implement-ndjson-ingestion-pipeline
dependabot/npm_and_yarn/api/npm_and_yarn-aa68fbd092
feature-4
feature-chatbot-agent
feature-code-quality-security
feature-enhancements
feature-visual-refinements
main-1
test-chat-agent-interactions
testing-file-fetch

Execution

After merge, trigger cleanup via Actions tab → "Cleanup Old Branches" → "Run workflow", or run ./scripts/delete-old-branches.sh locally with push access.

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