diff --git a/vscode/src/git/release.ts b/vscode/src/git/release.ts
new file mode 100644
index 0000000..b7b9ff9
--- /dev/null
+++ b/vscode/src/git/release.ts
@@ -0,0 +1,159 @@
+/**
+ * 发布分支管理的纯 git 逻辑：切发布点、统计未发布提交、cherry-pick 修复到发布分支。
+ * 不依赖 VS Code API；所有写操作只碰远端引用和临时 worktree，不改用户工作区。
+ */
+import { execFile } from 'node:child_process'
+import { mkdtemp, rm } from 'node:fs/promises'
+import * as os from 'node:os'
+import * as path from 'node:path'
+
+const DEFAULT_PREFIX = 'release/'
+
+export interface ReleaseStatus {
+  devBranch: string
+  /** 当期发布分支全名（含前缀）；远端没有任何发布分支时为 undefined */
+  current: string | undefined
+  /** 未发布提交数；current 为 undefined 时为 0 */
+  unreleased: number
+  /** 结构性不可用（fetch 失败 / devBranch 远端不存在），带原因 */
+  unavailable?: string
+}
+
+export interface UnreleasedCommit {
+  sha: string
+  subject: string
+  author: string
+  date: string
+}
+
+export class ReleaseError extends Error {
+  constructor(message: string, public readonly detail?: string) {
+    super(message)
+    this.name = 'ReleaseError'
+  }
+}
+
+interface Run { ok: boolean, stdout: string, stderr: string }
+
+function runGit(cwd: string, args: string[], timeoutMs = 30_000): Promise<Run> {
+  return new Promise((resolve) => {
+    execFile('git', ['-C', cwd, ...args], { timeout: timeoutMs, encoding: 'utf8' }, (err, stdout, stderr) => {
+      resolve({ ok: !err, stdout: stdout ?? '', stderr: stderr ?? '' })
+    })
+  })
+}
+
+const tail = (s: string, n = 400): string => s.trim().slice(-n)
+
+async function mustGit(cwd: string, args: string[], failLabel: string): Promise<string> {
+  const r = await runGit(cwd, args)
+  if (!r.ok)
+    throw new ReleaseError(`${failLabel}：${tail(r.stderr)}`, r.stderr)
+  return r.stdout.trim()
+}
+
+export function normalizeReleasePrefix(raw: string): string {
+  const t = raw.trim()
+  if (!t)
+    return DEFAULT_PREFIX
+  return t.endsWith('/') ? t : `${t}/`
+}
+
+export function todayReleaseBranch(prefix: string, now = new Date()): string {
+  const y = now.getFullYear()
+  const m = String(now.getMonth() + 1).padStart(2, '0')
+  const d = String(now.getDate()).padStart(2, '0')
+  return `${prefix}${y}-${m}-${d}`
+}
+
+/** 发布分支名是 ISO 日期，字典序即时间序，不解析日期 */
+export function pickCurrentRelease(prefix: string, remoteBranches: string[]): string | undefined {
+  return remoteBranches.filter(b => b.startsWith(prefix)).sort().at(-1)
+}
+
+async function remoteBranchNames(cwd: string, prefix: string): Promise<string[]> {
+  const out = await mustGit(cwd, ['for-each-ref', '--format=%(refname:strip=3)', `refs/remotes/origin/${prefix}`], '读取远端发布分支失败')
+  return out ? out.split('\n') : []
+}
+
+async function remoteRefExists(cwd: string, branch: string): Promise<boolean> {
+  return (await runGit(cwd, ['show-ref', '--verify', '--quiet', `refs/remotes/origin/${branch}`])).ok
+}
+
+/** 左边是发布分支、右边是开发分支：只数右边独有、且补丁内容没被 cherry-pick 过去的提交 */
+const unreleasedRange = (current: string, devBranch: string): string => `origin/${current}...origin/${devBranch}`
+
+export async function getReleaseStatus(o: { cwd: string, devBranch: string, prefix: string }): Promise<ReleaseStatus> {
+  const base = { devBranch: o.devBranch, current: undefined, unreleased: 0 }
+  const fetched = await runGit(o.cwd, ['fetch', 'origin', '--prune'])
+  if (!fetched.ok)
+    return { ...base, unavailable: `拉取远端失败：${tail(fetched.stderr)}` }
+  if (!await remoteRefExists(o.cwd, o.devBranch))
+    return { ...base, unavailable: `远端没有 ${o.devBranch}` }
+  const current = pickCurrentRelease(o.prefix, await remoteBranchNames(o.cwd, o.prefix))
+  if (!current)
+    return base
+  const count = await mustGit(
+    o.cwd,
+    ['rev-list', '--count', '--right-only', '--cherry-pick', '--no-merges', unreleasedRange(current, o.devBranch)],
+    '统计未发布提交失败',
+  )
+  return { devBranch: o.devBranch, current, unreleased: Number(count) }
+}
+
+/** 新→旧；不 fetch，调用方自己决定何时刷新远端 */
+export async function listReleaseBranches(o: { cwd: string, prefix: string }): Promise<string[]> {
+  const names = await remoteBranchNames(o.cwd, o.prefix)
+  return names.filter(b => b.startsWith(o.prefix)).sort().reverse()
+}
+
+export async function listUnreleasedCommits(o: { cwd: string, devBranch: string, current: string }): Promise<UnreleasedCommit[]> {
+  const out = await mustGit(
+    o.cwd,
+    ['log', '--right-only', '--cherry-pick', '--no-merges', '--format=%H%x00%s%x00%an%x00%as', unreleasedRange(o.current, o.devBranch)],
+    '读取未发布提交失败',
+  )
+  if (!out)
+    return []
+  return out.split('\n').map((line) => {
+    const [sha, subject, author, date] = line.split('\0')
+    return { sha, subject, author, date }
+  })
+}
+
+/** 纯远端切分支；返回该分支相对上一个发布点的提交数（无上一个则为 0） */
+export async function cutRelease(o: { cwd: string, devBranch: string, branch: string }): Promise<number> {
+  await mustGit(o.cwd, ['fetch', 'origin', '--prune'], '拉取远端失败')
+  if (await remoteRefExists(o.cwd, o.branch))
+    throw new ReleaseError(`发布分支 ${o.branch} 已存在`)
+  const prefix = o.branch.slice(0, o.branch.lastIndexOf('/') + 1)
+  const prev = pickCurrentRelease(prefix, await remoteBranchNames(o.cwd, prefix))
+  await mustGit(o.cwd, ['push', 'origin', `origin/${o.devBranch}:refs/heads/${o.branch}`], `推送 ${o.branch} 失败`)
+  if (!prev)
+    return 0
+  const count = await mustGit(o.cwd, ['rev-list', '--count', `origin/${prev}..origin/${o.devBranch}`], '统计提交数失败')
+  return Number(count)
+}
+
+/** 在临时 worktree 里按给定顺序（旧→新）cherry-pick，成功才推远端；无论成败都清理 worktree */
+export async function cherryPickToRelease(o: { cwd: string, branch: string, shas: string[] }): Promise<void> {
+  await mustGit(o.cwd, ['fetch', 'origin', '--prune'], '拉取远端失败')
+  const tmp = await mkdtemp(path.join(os.tmpdir(), 'sw-release-'))
+  try {
+    await mustGit(o.cwd, ['worktree', 'add', '--detach', tmp, `origin/${o.branch}`], '创建临时 worktree 失败')
+    for (const sha of o.shas) {
+      const picked = await runGit(tmp, ['cherry-pick', '-x', sha])
+      if (!picked.ok) {
+        await runGit(tmp, ['cherry-pick', '--abort'])
+        const subject = (await runGit(tmp, ['log', '-1', '--format=%s', sha])).stdout.trim()
+        throw new ReleaseError(`${sha.slice(0, 7)} ${subject} 冲突，请手动处理`, picked.stderr)
+      }
+    }
+    await mustGit(tmp, ['push', 'origin', `HEAD:refs/heads/${o.branch}`], `推送 ${o.branch} 失败`)
+  }
+  finally {
+    await runGit(o.cwd, ['worktree', 'remove', '--force', tmp])
+    await rm(tmp, { recursive: true, force: true })
+    await runGit(o.cwd, ['worktree', 'prune'])
+  }
+}
diff --git a/vscode/test/git/release.test.ts b/vscode/test/git/release.test.ts
new file mode 100644
index 0000000..9a63350
--- /dev/null
+++ b/vscode/test/git/release.test.ts
@@ -0,0 +1,110 @@
+import { execFileSync } from 'node:child_process'
+import { promises as fsp, rmSync, writeFileSync } from 'node:fs'
+import * as os from 'node:os'
+import * as path from 'node:path'
+import { afterEach, describe, expect, it } from 'vitest'
+import {
+  cherryPickToRelease,
+  cutRelease,
+  getReleaseStatus,
+  listReleaseBranches,
+  listUnreleasedCommits,
+  normalizeReleasePrefix,
+  pickCurrentRelease,
+  todayReleaseBranch,
+} from '../../src/git/release'
+
+const gitEnv = { ...process.env, GIT_CONFIG_NOSYSTEM: '1', GIT_CONFIG_GLOBAL: '/dev/null', GIT_TERMINAL_PROMPT: '0', GIT_AUTHOR_NAME: 't', GIT_AUTHOR_EMAIL: 't@t', GIT_COMMITTER_NAME: 't', GIT_COMMITTER_EMAIL: 't@t' }
+const git = (cwd: string, args: string[]) => execFileSync('git', ['-C', cwd, ...args], { encoding: 'utf8', env: gitEnv }).trim()
+
+interface Fx { root: string, origin: string, repo: string, peer: string }
+async function setup(): Promise<Fx> {
+  const root = await fsp.mkdtemp(path.join(os.tmpdir(), 'sw-release-'))
+  const origin = path.join(root, 'origin.git')
+  git(root, ['init', '--bare', '-b', 'main', origin])
+  const peer = path.join(root, 'peer')
+  git(root, ['clone', origin, peer])
+  commit(peer, 'a.txt', 'a', 'init')
+  git(peer, ['push', '-u', 'origin', 'main'])
+  const repo = path.join(root, 'repo')
+  git(root, ['clone', origin, repo])
+  return { root, origin, repo, peer }
+}
+function commit(cwd: string, file: string, content: string, msg: string): string {
+  writeFileSync(path.join(cwd, file), `${content}\n`)
+  git(cwd, ['add', file])
+  git(cwd, ['commit', '-m', msg])
+  return git(cwd, ['rev-parse', 'HEAD'])
+}
+let fx: Fx | undefined
+afterEach(() => {
+  if (fx)
+    rmSync(fx.root, { recursive: true, force: true })
+  fx = undefined
+})
+
+describe('纯函数', () => {
+  it('normalizeReleasePrefix', () => {
+    expect(normalizeReleasePrefix('')).toBe('release/')
+    expect(normalizeReleasePrefix(' rel ')).toBe('rel/')
+    expect(normalizeReleasePrefix('release/')).toBe('release/')
+  })
+  it('todayReleaseBranch', () => {
+    expect(todayReleaseBranch('release/', new Date(2026, 7, 31))).toBe('release/2026-08-31')
+  })
+  it('pickCurrentRelease 取前缀内字典序最大', () => {
+    expect(pickCurrentRelease('release/', ['main', 'release/2026-08-01', 'release/2026-08-31', 'hotfix/2027'])).toBe('release/2026-08-31')
+    expect(pickCurrentRelease('release/', ['main'])).toBeUndefined()
+  })
+})
+
+describe('集成', () => {
+  it('无发布分支 → current undefined，unreleased 0', async () => {
+    fx = await setup()
+    const s = await getReleaseStatus({ cwd: fx.repo, devBranch: 'main', prefix: 'release/' })
+    expect(s).toMatchObject({ devBranch: 'main', current: undefined, unreleased: 0 })
+    expect(s.unavailable).toBeUndefined()
+  })
+  it('cutRelease 纯远端切分支，不建本地分支', async () => {
+    fx = await setup()
+    const { repo, origin } = fx
+    await cutRelease({ cwd: repo, devBranch: 'main', branch: 'release/2026-08-31' })
+    expect(git(origin, ['rev-parse', 'release/2026-08-31'])).toBe(git(origin, ['rev-parse', 'main']))
+    expect(() => git(repo, ['rev-parse', '--verify', 'refs/heads/release/2026-08-31'])).toThrow()
+    await expect(cutRelease({ cwd: repo, devBranch: 'main', branch: 'release/2026-08-31' })).rejects.toThrow(/已存在/)
+  })
+  it('unreleased 计数忽略已 cherry-pick 的提交；cherryPickToRelease 推远端并清理 worktree', async () => {
+    fx = await setup()
+    await cutRelease({ cwd: fx.repo, devBranch: 'main', branch: 'release/2026-08-31' })
+    const fix = commit(fx.peer, 'b.txt', 'b', 'fix b')
+    commit(fx.peer, 'c.txt', 'c', 'feat c')
+    git(fx.peer, ['push', 'origin', 'main'])
+    let s = await getReleaseStatus({ cwd: fx.repo, devBranch: 'main', prefix: 'release/' })
+    expect(s).toMatchObject({ current: 'release/2026-08-31', unreleased: 2 })
+    const list = await listUnreleasedCommits({ cwd: fx.repo, devBranch: 'main', current: 'release/2026-08-31' })
+    expect(list.map(c => c.subject)).toEqual(['feat c', 'fix b'])
+    await cherryPickToRelease({ cwd: fx.repo, branch: 'release/2026-08-31', shas: [fix] })
+    expect(git(fx.origin, ['log', '--format=%s', 'release/2026-08-31'])).toBe('fix b\ninit')
+    expect(git(fx.repo, ['worktree', 'list']).split('\n')).toHaveLength(1)
+    s = await getReleaseStatus({ cwd: fx.repo, devBranch: 'main', prefix: 'release/' })
+    expect(s.unreleased).toBe(1)
+  })
+  it('cherry-pick 冲突 → 抛错、远端不变、worktree 已清理', async () => {
+    fx = await setup()
+    await cutRelease({ cwd: fx.repo, devBranch: 'main', branch: 'release/2026-08-31' })
+    commit(fx.peer, 'a.txt', 'a2', 'change a')
+    const conflict = commit(fx.peer, 'a.txt', 'a3', 'change a again')
+    git(fx.peer, ['push', 'origin', 'main'])
+    const before = git(fx.origin, ['rev-parse', 'release/2026-08-31'])
+    await expect(cherryPickToRelease({ cwd: fx.repo, branch: 'release/2026-08-31', shas: [conflict] })).rejects.toThrow(/冲突/)
+    expect(git(fx.origin, ['rev-parse', 'release/2026-08-31'])).toBe(before)
+    expect(git(fx.repo, ['worktree', 'list']).split('\n')).toHaveLength(1)
+  })
+  it('listReleaseBranches 新→旧', async () => {
+    fx = await setup()
+    await cutRelease({ cwd: fx.repo, devBranch: 'main', branch: 'release/2026-08-01' })
+    await cutRelease({ cwd: fx.repo, devBranch: 'main', branch: 'release/2026-08-31' })
+    git(fx.repo, ['fetch', 'origin'])
+    expect(await listReleaseBranches({ cwd: fx.repo, prefix: 'release/' })).toEqual(['release/2026-08-31', 'release/2026-08-01'])
+  })
+})