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+#!/usr/bin/env bun
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+
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+import { $ } from "bun"
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+import { createOpencode } from "@opencode-ai/sdk"
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+import { parseArgs } from "util"
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+
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+export const team = [
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+ "actions-user",
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+ "opencode",
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+ "rekram1-node",
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+ "thdxr",
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+ "kommander",
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+ "jayair",
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+ "fwang",
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+ "adamdotdevin",
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+ "iamdavidhill",
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+ "opencode-agent[bot]",
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+]
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+
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+export async function getLatestRelease() {
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+ return fetch("https://api.github.com/repos/sst/opencode/releases/latest")
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+ .then((res) => {
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+ if (!res.ok) throw new Error(res.statusText)
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+ return res.json()
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+ })
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+ .then((data: any) => data.tag_name.replace(/^v/, ""))
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+}
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+
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+export async function getCommits(from: string, to: string) {
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+ const fromRef = from.startsWith("v") ? from : `v${from}`
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+ const toRef = to === "HEAD" ? to : to.startsWith("v") ? to : `v${to}`
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+ const log =
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+ await $`git log ${fromRef}..${toRef} --oneline --format="%h %s" -- packages/opencode packages/sdk packages/plugin packages/desktop packages/app`.text()
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+ return log.split("\n").filter((line) => line && !line.match(/^\w+ (ignore:|test:|chore:|ci:)/i))
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+}
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+
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+export async function generateChangelog(from: string, to: string, commits: string[]) {
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+ const opencode = await createOpencode()
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+ const session = await opencode.client.session.create()
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+ console.log("generating changelog since " + from)
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+
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+ const raw = await opencode.client.session
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+ .prompt({
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+ path: {
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+ id: session.data!.id,
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+ },
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+ body: {
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+ model: {
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+ providerID: "opencode",
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+ modelID: "claude-sonnet-4-5",
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+ },
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+ parts: [
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+ {
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+ type: "text",
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+ text: `
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+ Analyze these commits and generate a changelog of all notable user facing changes, grouped by area.
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+
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+ Each commit below includes:
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+ - [author: username] showing the GitHub username of the commit author
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+ - [areas: ...] showing which areas of the codebase were modified
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+
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+ Commits between ${from} and ${to}:
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+ ${commits.join("\n")}
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+
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+ Group the changes into these categories based on the [areas: ...] tags (omit any category with no changes):
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+ - **TUI**: Changes to "opencode" area (the terminal/CLI interface)
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+ - **Desktop**: Changes to "app" or "tauri" areas (the desktop application)
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+ - **SDK**: Changes to "sdk" or "plugin" areas (the SDK and plugin system)
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+ - **Extensions**: Changes to "extensions/zed", "extensions/vscode", or "github" areas (editor extensions and GitHub Action)
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+ - **Other**: Any user-facing changes that don't fit the above categories
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+
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+ Excluded areas (omit these entirely unless they contain user-facing changes like refactors that may affect behavior):
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+ - "nix", "infra", "script" - CI/build infrastructure
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+ - "ui", "docs", "web", "console", "enterprise", "function", "util", "identity", "slack" - internal packages
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+
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+ Rules:
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+ - Use the [areas: ...] tags to determine the correct category. If a commit touches multiple areas, put it in the most relevant user-facing category.
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+ - ONLY include commits that have user-facing impact. Omit purely internal changes (CI, build scripts, internal tooling).
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+ - However, DO include refactors that touch user-facing code - refactors can introduce bugs or change behavior.
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+ - Do NOT make general statements about "improvements", be very specific about what was changed.
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+ - For commits that are already well-written and descriptive, avoid rewording them. Simply capitalize the first letter, fix any misspellings, and ensure proper English grammar.
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+ - DO NOT read any other commits than the ones listed above (THIS IS IMPORTANT TO AVOID DUPLICATING THINGS IN OUR CHANGELOG).
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+ - If a commit was made and then reverted do not include it in the changelog. If the commits only include a revert but not the original commit, then include the revert in the changelog.
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+ - Omit categories that have no changes.
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+ - For community contributors: if the [author: username] is NOT in the team list, add (@username) at the end of the changelog entry. This is REQUIRED for all non-team contributors.
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+ - The team members are: ${team.join(", ")}. Do NOT add @ mentions for team members.
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+
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+ IMPORTANT: ONLY return the grouped changelog, do not include any other information. Do not include a preamble like "Based on my analysis..." or "Here is the changelog..."
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+
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+ <example>
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+ ## TUI
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+ - Added experimental support for the Ty language server (@OpeOginni)
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+ - Added /fork slash command for keyboard-friendly session forking (@ariane-emory)
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+ - Increased retry attempts for failed requests
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+ - Fixed model validation before executing slash commands (@devxoul)
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+
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+ ## Desktop
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+ - Added shell mode support
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+ - Fixed prompt history navigation and optimistic prompt duplication
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+ - Disabled pinch-to-zoom on Linux (@Brendonovich)
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+
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+ ## Extensions
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+ - Added OIDC_BASE_URL support for custom GitHub App installations (@elithrar)
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+ </example>
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+ `,
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+ },
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+ ],
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+ },
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+ })
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+ .then((x) => x.data?.parts?.find((y) => y.type === "text")?.text)
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+ opencode.server.close()
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+ return raw
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+}
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+
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+export async function getContributors(from: string, to: string) {
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+ const fromRef = from.startsWith("v") ? from : `v${from}`
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+ const toRef = to === "HEAD" ? to : to.startsWith("v") ? to : `v${to}`
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+ const compare =
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+ await $`gh api "/repos/sst/opencode/compare/${fromRef}...${toRef}" --jq '.commits[] | {login: .author.login, message: .commit.message}'`.text()
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+ const contributors = new Map<string, string[]>()
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+
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+ for (const line of compare.split("\n").filter(Boolean)) {
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+ const { login, message } = JSON.parse(line) as { login: string | null; message: string }
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+ const title = message.split("\n")[0] ?? ""
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+ if (title.match(/^(ignore:|test:|chore:|ci:|release:)/i)) continue
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+
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+ if (login && !team.includes(login)) {
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+ if (!contributors.has(login)) contributors.set(login, [])
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+ contributors.get(login)?.push(title)
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+ }
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+ }
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+
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+ return contributors
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+}
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+
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+export async function buildNotes(from: string, to: string) {
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+ const notes: string[] = []
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+ const commits = await getCommits(from, to)
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+
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+ if (commits.length === 0) {
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+ return notes
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+ }
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+
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+ const timeout = new Promise<null>((resolve) => setTimeout(() => resolve(null), 120_000))
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+ const raw = await Promise.race([generateChangelog(from, to, commits), timeout])
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+
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+ if (raw) {
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+ for (const line of raw.split("\n")) {
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+ if (line.startsWith("- ")) {
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+ notes.push(line)
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+ }
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+ }
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+ console.log("---- Generated Changelog ----")
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+ console.log(notes.join("\n"))
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+ console.log("-----------------------------")
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+ } else {
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+ console.log("Changelog generation timed out, using raw commits")
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+ for (const commit of commits) {
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+ const message = commit.replace(/^\w+ /, "")
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+ notes.push(`- ${message}`)
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+ }
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+ }
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+
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+ const contributors = await getContributors(from, to)
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+
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+ if (contributors.size > 0) {
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+ notes.push("")
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+ notes.push(`**Thank you to ${contributors.size} community contributor${contributors.size > 1 ? "s" : ""}:**`)
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+ for (const [username, userCommits] of contributors) {
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+ notes.push(`- @${username}:`)
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+ for (const commit of userCommits) {
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+ notes.push(` - ${commit}`)
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+ }
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+ }
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+ }
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+
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+ return notes
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+}
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+
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+// CLI entrypoint
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+if (import.meta.main) {
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+ const { values } = parseArgs({
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+ args: Bun.argv.slice(2),
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+ options: {
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+ from: { type: "string", short: "f" },
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+ to: { type: "string", short: "t", default: "HEAD" },
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+ help: { type: "boolean", short: "h", default: false },
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+ },
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+ })
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+
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+ if (values.help) {
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+ console.log(`
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+Usage: bun script/changelog.ts [options]
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+
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+Options:
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+ -f, --from <version> Starting version (default: latest GitHub release)
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+ -t, --to <ref> Ending ref (default: HEAD)
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+ -h, --help Show this help message
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+
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+Examples:
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+ bun script/changelog.ts # Latest release to HEAD
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+ bun script/changelog.ts --from 1.0.200 # v1.0.200 to HEAD
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+ bun script/changelog.ts -f 1.0.200 -t 1.0.205
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+`)
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+ process.exit(0)
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+ }
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+
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+ const to = values.to!
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+ const from = values.from ?? (await getLatestRelease())
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+
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+ console.log(`Generating changelog: v${from} -> ${to}\n`)
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+
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+ const notes = await buildNotes(from, to)
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+ console.log("\n=== Final Notes ===")
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+ console.log(notes.join("\n"))
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+}
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Aiden Cline