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Launch drafts — AgenticMail for GitHub

These are ready-to-fire posts for the moment GitHub approves the Marketplace listing. Each one stands alone — pick whichever channels you want.

Tweet / X (single post, 280-char budget)

🎀 New: tag @agenticmail in any GitHub issue or PR and an AI agent reads the thread and replies inline.

Auto-triages new issues. Auto-summarizes new PRs. Free on the GitHub Marketplace.

👉 github.com/marketplace/agenticmail

Pinned tweet variant with screenshot — attach product-screenshot.png.

Tweet thread (4 posts)

1/4

🎀 Just shipped AgenticMail for GitHub — a Marketplace app that turns @agenticmail into an AI teammate that lives in your issues and PRs.

👉 github.com/marketplace/agenticmail

2/4

What it does:

• Tag @agenticmail to summarize a thread, triage an issue, or draft a reply. • Auto-summary on every new PR. • Auto-triage on every new issue.

Reply lands in ~8 seconds.

3/4

What I cared about while building it:

• HMAC-verified webhooks, delivery-UUID dedup, ack in <100ms. • Per-installation rate limit (60/hr) so a runaway loop can't drain quota. • Short-lived installation tokens, never persisted. • Bot self-mentions are ignored — no comment loops.

4/4

The same agent stack powers AgenticMail's broader platform — email, phone, browser, memory, 145 SaaS integrations.

The GitHub App is the simplest entry point. Free forever.

github.com/marketplace/agenticmail

Show HN

Title (80-char budget):

Show HN: AgenticMail for GitHub – tag @agenticmail in any issue and an AI replies

Body:

Hi HN — I shipped a GitHub Marketplace app today and wanted to share what's under the hood.

The pitch: install the app, then @agenticmail in any issue or PR comment gets you an inline AI reply within a few seconds. New issues are auto-triaged (suggested labels, priority, possible duplicates). New PRs are auto-summarized. There's no separate dashboard, no separate inbox — the entire UX is inside GitHub.

The architecture is deliberately small:

  • A single Netlify Function receives every webhook delivery.
  • HMAC-SHA256 verify against the raw body, constant-time compare.
  • Dedup on X-GitHub-Delivery UUID (5-min TTL in Netlify Blobs) so retries never double-post.
  • Ack 202 in under 100ms; the agent call runs in context.waitUntil.
  • Installation tokens are minted on demand from an RS256 JWT — never persisted, never cached across cold starts.
  • Per-installation token-bucket rate limit (60 invocations / rolling hour) so a workflow loop can't drain the Anthropic quota.
  • Every delivery writes one JSON entry to an audit blob store — keyed by <day>/<uuid> — so post-hoc "did the reviewer's event arrive?" is answerable in one HTTP call.

The actual reply is a single Anthropic message call against the thread context. I'm using the OAuth surface (anthropic-beta: oauth-2025-04-20) with claude-haiku-4-5 — cheap, fast, and good enough for the v1 commands (summarize, triage, email, reply, handoff, link).

What I'm uncertain about and would love feedback on:

  1. The rate limit. 60/hr is what feels right; I have no data on what real installations need. Open to suggestions.
  2. Auto-triage on every new issue. It's the magic moment for some teams and noise for others. v2 will let you opt out per repo.
  3. Whether to mint installation tokens once per cold start vs. per call. Currently per-call; the overhead is real but the security story is cleaner.

Source for the App is at github.com/agenticmail/github-app (the webhook function itself lives in our frontend repo). Install at github.com/marketplace/agenticmail. Free forever.

Happy to answer anything.

Marketplace listing description (one-liner for SEO)

Tag @agenticmail in any GitHub issue or PR and an AI agent reads the thread and replies inline. Auto-summarize PRs, auto-triage issues. Free.

LinkedIn

🚀 New release: AgenticMail for GitHub is live on the Marketplace.

What it is: a free GitHub App that lets your team tag @agenticmail in any issue or pull request to get an inline AI reply within seconds. New PRs get auto-summarized. New issues get auto-triaged with suggested labels and priority.

What it isn't: another dashboard you have to keep open. The whole UX is inside GitHub, where your work already happens.

Built with Anthropic Claude. HMAC-verified webhooks, per-installation rate limiting, short-lived installation tokens — the boring security bits are in place.

Install free → github.com/marketplace/agenticmail

Internal Slack / Discord announcement (terse)

🎀 AgenticMail for GitHub is live on the Marketplace — https://github.com/marketplace/agenticmail

Install it on a repo, tag @agenticmail in an issue or PR, and you'll get an inline AI reply. Auto-summarize on PR open. Auto-triage on issue open. Free.

Hammer it. File issues against agenticmail/github-app.

Pre-launch checklist (before posting anywhere)

  • Listing approved by GitHub and showing publicly at github.com/marketplace/agenticmail
  • Install at github.com/apps/agenticmail returns 200 (not 404)
  • @agenticmail summarize smoke test passes on at least 2 distinct repos
  • /api/github/health returns configured: true for all four secrets
  • /api/github/audit?day=YYYY-MM-DD returns recent entries
  • Pinned tweet has product-screenshot.png attached
  • Show HN draft has the actual URLs (not placeholders)