The code viewer for the agentic era.

Browse files and review what agents change: diffs, commits, branches, and the walkthroughs agents publish. Read-only and lean. Local, or a remote box served to your laptop.

$curl -fsSL https://raw.githubusercontent.com/flexdinesh/zero/main/scripts/install.sh | sh

If zero is taken, confirm zero-cli in your terminal or choose --name. Install details

Get started Read the docs

zero ~/code/apisynthetic demo

routes.ts· step 1 of 4session.tsREADME.md

src/routes.tsagent/session-expiry+3−2Viewed

4141 export function route(app) {

42- app.get("/orders", checkExpiry, orders)

43- app.get("/billing", billing)

42+ app.use(requireFreshSession)

43+ app.get("/orders", orders)

44+ app.get("/billing", billing)

4445 }

1Session expiry fix · step 1 of 4

The agent moved the expiry check into one middleware, so every route shares it. /billing was unprotected before.

4546

4647 export function health(app) {

4748 app.get("/health", ok)

4849 }

agent/session-expiry → main3 commits · 4 filesread-only

browse

Browse any file.

Every file in a folder, one command away. Markdown and images render, JSON and YAML format on demand, and everything else opens as highlighted source. Search names and content; go to definition through your language servers.

$ zero .

Browsing

zero ~/code/apisynthetic demo

README.mdconfig.yamllogo.pngPreviewSource

Explorer

api

docs

internal

config.yaml

logo.png

README.md

server.go

api

Routes requests to handlers. Start the server, then open the dashboard.

server:
  port: 8080
  timeout: 30s

Markdown2.1 KB

diffs

Review like a pull request.

Uncommitted work, commits, branches against any base, and commit ranges in one stacked diff, with line counts and Viewed marks. Changes refresh live while an agent works.

Source Control

zero ~/code/api · source controlsynthetic demo

Base: main

Uncommitted · 1

M routes.ts

Commits · 3

9f3c2e1 expire by age

41ab0d7 add middleware

c02e9f4 session tests

Branches

agent/session-expiry

routes.ts+3−2Viewed

4141 export function route(app) {

42- app.get("/orders", checkExpiry, orders)

43- app.get("/billing", billing)

42+ app.use(requireFreshSession)

43+ app.get("/orders", orders)

44+ app.get("/billing", billing)

4445 }

middleware/session.ts+11Viewed

1+ const maxAge = 30 * 60 * 1000

3+ export function requireFreshSession(

4+ req, res, next,

5+ ) {

6+ const at = req.session?.issuedAt ?? 0

7+ if (Date.now() - at > maxAge) {

8+ return res.status(401).end()

9+ }

10+ next()

11+ }

session.test.ts+41Viewed

main…agent/session-expiry4 files+59−21 / 4 viewed

walkthroughs

Agents walk you through their changes.

An agent publishes a guided tour of the files and diffs it touched. Each step opens its lines with the note inline. Steps pinned to a commit never move; if code drifts, the step says so instead of guessing.

$ zero walkthrough publish walkthrough.json

Ctrl → next stepCtrl ← previous

Walkthroughs Agent skill

zero ~/code/api · walkthroughssynthetic demo

Walkthroughs · 3

Session expiry fix4

Cache invalidation6

Billing retries3

Steps

1 · routes.ts

2 · session.ts

3 · session.test.ts

4 · README.md

session.ts· step 2 of 4routes.ts

12export function requireFreshSession(req, res, next) {

13 const age = Date.now() - req.session.issuedAt

14 if (age > MAX_AGE) return res.redirect("/login")

2Step 2 of 4

Age is measured from issuedAt, not last activity, so long sessions now expire on schedule.

15 next()

16}

pinned to 9f3c2e1read-only

remote

Serve a remote box to your laptop.

Run zero with --remote beside the files, then zero connect on your computer. The desktop app opens that machine in its own window over pinned TLS with a token. The host needs only the CLI.

Remote hosts

on the host · ssh dee@boxsynthetic demo

$ zero ~/code/foo --remote
  zero 1.4.0
  serving directory: /home/dee/code/foo

  on your computer, run:
  zero connect 10.0.0.5:7971/<credential>

on your laptop

$ zero connect 10.0.0.5:7971/<credential>

zero://r-3f9a1c2b7d4e/· foo

foo

cmd

README.md

foo

Served from the host over pinned TLS with a token, in its own window, tabs, and settings.

lean

Lean by construction.

One Go binary with its web app embedded. The desktop app uses the OS web view, not Electron. Files are never written, and git objects are read directly, never through the git binary.

$curl -fsSL https://raw.githubusercontent.com/flexdinesh/zero/main/scripts/install.sh | sh

If zero is taken, confirm zero-cli in your terminal or choose --name. Install details

Get started Read the docs

zero · factssynthetic demo

facts

Read-only: files never change
1 binary: Go, web app embedded
No Electron: desktop uses the OS web view
No git binary: reads git objects directly
No CDN: every asset bundled
Idle exit: daemon stops after 30 idle min

$ which zero
/home/dee/.local/bin/zero
$ zero daemon status
zero daemon 1.4.0 (protocol 1) at /run/user/1000/zero/daemon.sock, pid 4182, 2 roots

one binaryidle exit after 30 min