Completly deletes all MILESTONES within a given project

github.milestone.delete

/*
Before running:
  1. Go to your GitHub Settings > Developer Settings > Personal Access Tokens (classic).
     [https://github.com/settings/tokens]
  2. GENERATE NEW TOKEN -> GENERATE NEW TOKEN [not classic!]
  3. name it "labels"
  4. Experation: tommorow
  5. Select ONLY SELECT REPOSITORIES: your target repository
  6. + ADD PERMISSIONS
  7. Select ISSUES
  
  NOTE:
For a token to be granted "Read and write" access to Issues
  8. ACCESS: Read and Write
  9. GENERATE TOKEN
 10. Review your settings -> GENERATE TOKENS
 11. Copy token
 12. Paste that token into the YOUR_TOKEN_HERE.
 
 13. go to your MILESTONES page
     [yourname/your_project/milestones/]
 14. Open the browser CONSOLE
 15. paste the modified script
 16. run script and select JSON file
 17. verify it placed issues as expected
 
Use the sample JSON file to see how this works, than modify the JSON
to add your own issues, desc, etc.
NOTE:
 - All fields are required
 - DESC must be less than 100 characters
*/

github.milestone.delete.js

//DELETE MILESTONES

// 1. CONFIGURATION
// Generate a token at: https://github.com/settings/tokens
// Scope required: 'repo' (or 'public_repo' if public)
const CONFIG = {
    token: "YOUR_ACCESS_TOKEN_HERE", 
    owner: "USERNAME_OR_ORG",
    repo: "REPOSITORY_NAME"
};

// 2. THE SCRIPT
async function nukeMilestones() {
    const headers = {
        "Authorization": `token ${CONFIG.token}`,
        "Accept": "application/vnd.github.v3+json"
    };

    try {
        console.log("🔄 Fetching milestone list...");
        let milestones = [];
        let page = 1;
        
        // Step 1: Fetch ALL milestones (Open AND Closed)
        // We must loop to handle pagination if you have >100 milestones
        while (true) {
            const url = `https://api.github.com/repos/${CONFIG.owner}/${CONFIG.repo}/milestones?state=all&per_page=100&page=${page}`;
            const res = await fetch(url, { headers });
            if (!res.ok) throw new Error(`Fetch failed: ${res.status} ${res.statusText}`);
            
            const data = await res.json();
            if (data.length === 0) break;
            
            milestones = milestones.concat(data);
            page++;
        }

        if (milestones.length === 0) {
            console.log("✅ No milestones found to delete.");
            return;
        }

        console.log(`⚠️ Found ${milestones.length} milestones. Starting deletion...`);

        // Step 2: Delete one by one
        let deletedCount = 0;
        for (const ms of milestones) {
            console.log(`[${deletedCount + 1}/${milestones.length}] Deleting: "${ms.title}" (ID: ${ms.number})`);
            
            const deleteUrl = `https://api.github.com/repos/${CONFIG.owner}/${CONFIG.repo}/milestones/${ms.number}`;
            
            const delRes = await fetch(deleteUrl, { 
                method: "DELETE", 
                headers 
            });

            if (delRes.ok || delRes.status === 204) {
                deletedCount++;
            } else {
                console.error(`❌ Failed to delete "${ms.title}": ${delRes.status}`);
            }

            // Brief pause to be kind to the API
            await new Promise(r => setTimeout(r, 300));
        }

        console.log(`🏁 Operation Complete: ${deletedCount} milestones deleted.`);
        
    } catch (err) {
        console.error("❌ Error:", err.message);
        console.log("Double-check your Token and Repo/Owner names.");
    }
}

// 3. RUN
nukeMilestones();

sample.json

[
  {
    "title": "📑 [M1] Spec Resolution & Registry",
    "description": "\ud83c\udfc1 Milestone 1: The Blueprint\n\n\ud83c\udfaf Objective\nTransform OpenAPI 3.1 YAML into executable intent by resolving all references and building a frozen registry.\n\n\u2705 Definition of Done (DoD)\n- CLI loads a multi-file spec and outputs a registry preview.\n- Resolved `/openapi.json` endpoint serves full spec.\n- All $refs resolved and frozen.\n\n\ud83d\udce6 Acceptance Checks\n- CLI output shows full operation map (paths + security).\n- $ref errors cause readable CLI failure.\n- Registry is immutable after startup.\n\n\ud83d\udd17 Related Exec FRD\n- Contract Integrity\n- Spec Validation\n\n\ud83d\udee0\ufe0f Technical Guardrails\n- Python 3.11+, Pydantic v2\n- JSON Schema 2020-12 support\n- SpecLoader must not mutate spec at runtime.",
    "dueOn": "2026-02-06T00:00:00Z"
  }
]