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You'll use Val Town to host your bot and Slack's API to connect it to\nyour workspace.\n\n![test-message.png](https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/d10a52df-8920-4d46-1e03-fad0f847ae00/public)\n\nRead the full guide here: https://docs.val.town/integrations/slack/bot/","deleted","label","children",[],[154],{"_102":174,"_95":175,"_155":176,"_157":-5,"_158":136,"_159":135,"_161":162,"_104":177,"_99":178,"_164":179,"_166":180,"_168":22,"_169":-5,"_170":181,"_98":182},"c13a3e84-b6e8-11f0-b907-0224a6c84d84","main.tsx","019a3874-25bd-70fc-9d0b-b0f673d3c660",["D",1761977123878],79,"http","export const slackReplyToMessage = async (req: Request): Promise => {\n if (req.method === \"GET\") {\n return new Response(\"Slack bot is running!\", { status: 200 });\n }\n\n // Ignore Slack retries\n const retryNum = req.headers.get(\"x-slack-retry-num\");\n if (retryNum) return new Response(undefined, { status: 200 });\n\n // Parse body\n let body: any;\n try {\n const raw = await req.text();\n if (!raw) return new Response(\"Empty request body\", { status: 400 });\n body = JSON.parse(raw);\n } catch {\n return new Response(\"Invalid JSON\", { status: 400 });\n }\n\n // Verify Slack token & URL challenge\n if (body.token !== Deno.env.get(\"slackVerificationToken\")) {\n return new Response(undefined, { status: 401 });\n }\n if (body.challenge) return Response.json({ challenge: body.challenge });\n\n const event = body.event;\n if (event?.type !== \"app_mention\") {\n return new Response(undefined, { status: 200 });\n }\n\n const channel = event.channel;\n const ts = event.ts;\n const thread_ts = event.thread_ts ?? ts;\n\n // Prevent self-triggering\n const botUserId = Deno.env.get(\"slackBotUserId\");\n if (botUserId && event.user === botUserId) {\n return new Response(undefined, { status: 200 });\n }\n\n try {\n // Fetch thread data\n const replyRes = await fetch(\n `https://slack.com/api/conversations.replies?channel=${\n encodeURIComponent(channel)\n }&ts=${encodeURIComponent(thread_ts)}`,\n { headers: { \"Authorization\": `Bearer ${Deno.env.get(\"slackToken\")}` } },\n );\n const threadData = await replyRes.json();\n\n if (!threadData.ok) {\n await postToSlack(channel, thread_ts, \"Could not fetch thread.\");\n return new Response(undefined, { status: 200 });\n }\n\n // Avoid duplicate summaries (if already posted numbered list)\n const alreadySummarized = (threadData.messages ?? []).some(\n (m: any) => m.user === botUserId && /^\\s*1\\.\\s/m.test(m.text ?? \"\"),\n );\n if (alreadySummarized) return new Response(undefined, { status: 200 });\n\n // Extract feature flag key\n const parent = threadData.messages?.[0]?.blocks?.[2]?.fields?.[5];\n if (!parent || typeof parent.text !== \"string\") {\n await postToSlack(\n channel,\n thread_ts,\n \"No feature flag present in the message.\",\n );\n return new Response(undefined, { status: 200 });\n }\n\n const match = parent.text.match(/Feature\\s+Flag\\s*[:]\\s*\\*?\\s*([\\w\\-]+)/i);\n if (!match) {\n await postToSlack(\n channel,\n thread_ts,\n \"No feature flag present in the message.\",\n );\n return new Response(undefined, { status: 200 });\n }\n\n const extractedKey = match[1].trim();\n\n // Fetch from PostHog\n const posthogKey = Deno.env.get(\"posthogFeatureFlagKey\");\n const projectId = Deno.env.get(\"posthogProjectId\");\n\n if (!posthogKey || !projectId) {\n await postToSlack(channel, thread_ts, \"PostHog not configured.\");\n return new Response(undefined, { status: 200 });\n }\n\n const fetchFlag = async (key: string) => {\n try {\n const res = await fetch(\n `https://app.posthog.com/api/projects/${projectId}/feature_flags/?search=${\n encodeURIComponent(key)\n }`,\n { headers: { \"Authorization\": `Bearer ${posthogKey}` } },\n );\n\n if (!res.ok) return null;\n\n const data = await res.json();\n return Array.isArray(data.results)\n ? data.results.find((f: any) => f.key === key)\n : null;\n } catch {\n return null;\n }\n };\n\n const candidates = /^dev[-_]/i.test(extractedKey)\n ? [extractedKey, extractedKey.replace(/^dev[-_]/i, \"\")]\n : [extractedKey, `dev-${extractedKey}`, `dev_${extractedKey}`];\n\n let flagJson: any = null;\n for (const candidate of candidates) {\n const f = await fetchFlag(candidate);\n if (f) {\n flagJson = f;\n break;\n }\n }\n\n if (!flagJson) {\n await postToSlack(\n channel,\n thread_ts,\n `Feature flag: ${extractedKey} not found.`,\n );\n return new Response(undefined, { status: 200 });\n }\n\n // Claude analysis prompt\n const systemPrompt = `\nYou analyze a PostHog feature flag JSON and output a concise numbered list (2–4 items) telling business stakeholders **who currently has this feature**.\n\nSTRICT OUTPUT\n- Output ONLY a numbered list starting at \"1.\" (no headings, no intro/outro, no code/JSON).\n- All dates must end with \"(UTC)\".\n- Each point must end with a period unless it already ends with (UTC).\n\nUNIX / DATE CONVERSION — DO THIS EXACTLY\n- Every UNIX timestamp will always be a **10-digit integer in seconds** (e.g., 1759123919).\n- Convert it as **seconds since 1970-01-01T00:00:00Z**.\n- Always use **UTC timezone** (no offsets, no local assumptions).\n- Format as: **\" , (UTC)\"** — e.g., \"September 28, 2025 (UTC)\".\n- Verify conversion by re-encoding the date to UNIX and confirming it matches within ±1 second.\n- If verification fails, explicitly state: \"Invalid UNIX timestamp — could not convert reliably.\"\n\nINTERNAL USERS (treat these as internal even if not in a cohort)\n- Any email containing \"@littlebird\", \"@genos\", or \"@studiomgmt\".\n- The following specific emails: alexandergreen22@gmail.com, rustam.z.k@gmail.com, vedvyapak@gmail.com, \n vasilyuk.dm@gmail.com, ashwinmathews@gmail.com, shah.naman@gmail.com\n- Any cohort/property name containing \"Little Bird Internal\", \"Internal\", \"Team\", or \"Developer\".\n\nCLASSIFICATION LOGIC\n1) If targeting only internal users (by the above emails/domains/cohorts), write:\n - \"This feature is live for internal users.\"\n2) If there's a percentage rollout to a broad/unspecified audience (e.g., 5%, 10%, 50%), write:\n - \"Rolled out to X% of users.\"\n - If multivariate variants exist (A/B/n), say: \"A/B test between (e.g., 50/50).\"\n3) If rollout_percentage = 100 with no internal restriction, write:\n - \"Live for all users.\"\n4) If only a handful of specific emails or a small cohort are included, write:\n - \"Limited test rollout (developer).\"\n - If possible, mention how many and list names/emails succinctly.\n5) If any property uses \\`signup_unix\\`:\n - \\`signup_unix < N\\` → \"Launched for users who signed up **before (UTC)**.\"\n - \\`signup_unix > N\\` → \"Launched for users who signed up **after (UTC)**.\"\n - Convert N using the strict UNIX-seconds rule above and verify accuracy.\n6) Only individual creator names. Do NOT include org/team credits or phrases like \"by \". Example: \"Created by Sibi on September 29, 2025 (UTC).\"\n7) Always include a final line when inferrable:\n - \"Created by on (UTC).\" (from created_at) or \"Effective since (UTC).\"\n \nReturn only the numbered list — no extra commentary or formatting beyond that.\n`.trim();\n\n const claudeApiKey = Deno.env.get(\"claudeApiKey\");\n\n if (!claudeApiKey) {\n await postToSlack(channel, thread_ts, \"Claude API not configured.\");\n return new Response(undefined, { status: 200 });\n }\n\n let output = \"Could not analyze feature flag.\";\n\n try {\n const res = await fetch(\"https://api.anthropic.com/v1/messages\", {\n method: \"POST\",\n headers: {\n \"content-type\": \"application/json\",\n \"x-api-key\": claudeApiKey,\n \"anthropic-version\": \"2023-06-01\",\n },\n body: JSON.stringify({\n model: \"claude-3-5-haiku-latest\",\n max_tokens: 400,\n system: systemPrompt,\n messages: [{ role: \"user\", content: JSON.stringify(flagJson) }],\n }),\n });\n\n if (!res.ok) {\n console.error(\"Claude API error:\", res.status, await res.text());\n } else {\n const j = await res.json();\n output = j?.content?.[0]?.text?.trim() ?? output;\n }\n } catch (e) {\n console.error(\"Claude API request failed:\", e);\n }\n\n await postToSlack(channel, thread_ts, output);\n return new Response(undefined, { status: 200 });\n } catch (e) {\n console.error(\"Handler error:\", e);\n try {\n await postToSlack(channel, thread_ts, \"Something went wrong.\");\n } catch {\n // Silently fail if can't post error to Slack\n }\n return new Response(undefined, { status: 200 });\n }\n};\n\n// Helper to post to Slack\nasync function postToSlack(channel: string, thread_ts: string, text: string) {\n const res = await fetch(\"https://slack.com/api/chat.postMessage\", {\n method: \"POST\",\n headers: {\n \"Authorization\": `Bearer ${Deno.env.get(\"slackToken\")}`,\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({\n channel,\n thread_ts,\n text,\n unfurl_links: false,\n unfurl_media: false,\n }),\n });\n const data = await res.json();\n if (!data.ok) console.error(\"chat.postMessage error:\", data.error);\n}",[],[175],"files",[152,173],"counts",{"_187":32,"_188":160,"_189":32,"_190":191},"pulls","branches","forks","envVars",{"_192":193,"_194":32},"count",6,"emptyCount","contents",[197,200],{"_102":153,"_95":154,"_155":156,"_157":-5,"_158":136,"_159":160,"_161":162,"_104":198,"_99":32,"_164":165,"_166":167,"_168":22,"_169":-5,"_98":199},["D",1761883727218],[154],{"_102":174,"_95":175,"_155":176,"_157":-5,"_158":136,"_159":135,"_161":162,"_104":201,"_99":178,"_164":179,"_166":180,"_168":22,"_169":-5,"_98":202},["D",1761977123878],[175],"upstreamProject",{"_102":144,"_95":205,"_110":206,"_111":-5,"_108":109,"_23":207},"slackBotExample","Build a Slack bot!",{"_93":208,"_128":209},"charmaine","https://img.clerk.com/eyJ0eXBlIjoicHJveHkiLCJzcmMiOiJodHRwczovL2ltYWdlcy5jbGVyay5kZXYvdXBsb2FkZWQvaW1nXzJ4cFpFME5pSXNZamJNd296dlZSYVJ0OVF1RSJ9","upstreamBranch",{"_102":139,"_104":212,"_213":214,"_95":43,"_137":144,"_99":141,"_138":-5,"_140":-5,"_215":216,"_106":-5,"_149":22,"_108":109,"_148":208,"_16":146,"_147":205},["D",1749674693975],"updatedAt",["D",1752062104579],"lockfileKey","1752074820873-esm.town_v_charmaine_slackBotExample@15-main","emptyEnvVars","isNew","flags",[],"routes/_app.x.$handle.$name.environment-variables",{"_93":94,"_95":96,"_100":223,"_190":228},{"_102":103,"_95":96,"_104":224,"_106":-5,"_107":22,"_108":109,"_110":-5,"_111":-5,"_14":112,"_113":-5,"_114":22,"_115":-5,"_116":32,"_16":117,"_118":119,"_120":119,"_121":122,"_123":122,"_124":122,"_125":119,"_126":119,"_23":225,"_130":226,"_133":227,"_149":22},["D",1761883727218],{"_93":94,"_128":129},{"_93":94,"_132":129},{"_99":135,"_95":43,"_102":136,"_137":103,"_138":139,"_140":141,"_142":109,"_143":144,"_145":146,"_147":96,"_148":94},[229,234,237,240,243,248],{"_230":231,"_104":232,"_213":-5,"_110":72,"_233":22},"key","slackBotUserId",["D",1761904732851],"isEmpty",{"_230":235,"_104":236,"_213":-5,"_110":72,"_233":22},"claudeApiKey",["D",1761895098517],{"_230":238,"_104":239,"_213":-5,"_110":72,"_233":22},"posthogProjectId",["D",1761890291087],{"_230":241,"_104":242,"_213":-5,"_110":72,"_233":22},"posthogFeatureFlagKey",["D",1761890111338],{"_230":244,"_104":245,"_213":246,"_110":247,"_233":22},"slackToken",["D",1761883727218],["D",1761883783057],"Bot User OAuth Token, starts with xoxb-",{"_230":249,"_104":250,"_213":251,"_110":252,"_233":22},"slackVerificationToken",["D",1761883727218],["D",1761883763454],"Copy the Verification Token of your Slack bot","actionData","errors"]

vedvyapak

posthogFeatureFlag

Environment variables