Stacked PRs that stay stacked
Forge rebases, re-checks and re-routes reviewers as the stack changes. Land the bottom, the rest follows.
v4.2 Merge queues now rebase stacked PRs
Ship the PR.Skip the wait.
Forge runs only the tests your diff touches, reviews every line before a human does, and lands the merge in about ninety seconds. Works with the GitHub repo you already have.
Merging 2.1 million PRs a month for 3,400 engineering teams
- Linear Labs
- northwind
- PARCEL
- Halcyon
- tessellate
- Orbital
- kiln.dev
- Quanta
01 · Anatomy of a merge
From push to prod,
one minute twenty-eight.
Every step below is a real span from PR #4182 in the acme/api monorepo — 1.4M lines, 61 services, 180 engineers.
- 00:00Push
PR opened from your branch
Forge reads the diff, the dependency graph and the CODEOWNERS file before CI even starts.
- 00:04Select
214 of 9,812 tests selected
Test impact analysis maps every changed symbol to the tests that exercise it. The other 9,598 stay cached.
- 00:11Build
Remote cache hit, 11 seconds
Content-addressed build artifacts are shared across every branch, so the second build is almost free.
- 00:52Review
Auto-review leaves two suggestions
Forge comments like a careful staff engineer: idempotency, missing indexes, unhandled errors. Never style nits.
- 01:14Approve
A human signs off
Reviewers are routed by ownership and load. Hot files with incident history pull in a second reviewer automatically.
- 01:28Merge
Queued, rebased, merged, deployed
The merge queue batches compatible PRs, re-runs only what changed after rebase and promotes to production.
02 · Auto-review
Reviews that read the code,
not the linter output.
Forge checks for the bugs that page people at 3 a.m. — race conditions, missing idempotency, unbounded queries — and stays silent about semicolons.
4141 export async function rotateSession(userId: string) {
4242 const current = await db.session.findActive(userId);
43- await db.session.revoke(current.id);
44- return db.session.create({ userId });
43+ return db.transaction(async (tx) => {
44+ await tx.session.revoke(current.id);
45+ const next = await tx.session.create({ userId });
46+ audit.emit("session.rotated", { userId });
47+ return next;
48+ });
4549 }
03 · The ninety-second merge
Same PR. Ten times sooner.
Forge0:00
Same PR on full-suite CI0:00
Checkout + diff4s
Build (cached)11s
Unit · 214 tests38s
Integration · 4152s
Auto-review37s
Human approval22s
Merge queue + deploy14s
04 · Built for the merge queue
Less waiting.
More shipping.
Flake quarantine
Tests that fail then pass on retry are isolated, owned and ticketed — never blocking your merge.
Shared build cache
Content-addressed artifacts across every branch and laptop. Cold builds become a rounding error.
Cycle time you’ll actually open on Monday
PR cycle time, review latency and flake rate per team — measured from the same spans that run your CI.
05 · Integrations
Fits the stack
you won’t migrate.
Forge is a GitHub App and a single YAML file. No runners to babysit, no agents in your VPC unless you want them.
GitHubChecks, merge queue, CODEOWNERSGitLabMR pipelines and approvalsSlackReview requests that respect focus timeLinearIssue status follows the PRJiraTransitions on merge and deployPagerDutyIncident history weights reviewsDatadogDeploy markers and test tracesSentryRegressions linked to the PRVercelPreview URLs on every commitAWSOIDC deploys to ECS and LambdaBazelRemote execution and cacheTerraformPlan diffs as review comments
- 14m → 90s
- median pipeline after enabling test selection
- −41%
- PR cycle time in the first 30 days
- 0.3%
- of auto-review comments dismissed as noise
- SOC 2
- Type II · code never used for training
“We used to batch merges at 4 p.m. because CI took fifteen minutes. Now people merge whenever they’re done, and the queue just… keeps up.”
Priya AnandHead of Platform, Tessellate · 240 engineers06 · Pricing
Per seat.
CI minutes included.
Hobby
Open source and side projects.
$0
- Public repos, unlimited
- 3 private repos
- 2,000 CI minutes / mo
- Auto-review on 50 PRs / mo
Team
Most teamsMerge queues, test selection, unlimited review.
$456/ mo
24 seats × $19 billed yearly
- Unlimited private repos
- 25,000 CI minutes / seat pool
- Smart test selection
- Merge queue + stacked PRs
- SAML SSO
Enterprise
Self-hosted runners and custom retention.
Custom
- Runners in your VPC
- SCIM, audit log streaming
- 99.95% uptime SLA
- Dedicated solutions engineer
Your next PR could already be merged.
Install the GitHub App, add one YAML file, push. Most teams see their first sub-two-minute merge the same afternoon.
Good call wrapping revoke + create in a transaction. Retries from the mobile client will still mint two sessions though — key the transaction on
request.idempotencyKey.Include the previous session id so dashboards can split rotations from logouts.
- audit.emit("session.rotated", { userId });+ audit.emit("session.rotated", { userId, prev: current.id });This file had 14 incidents last quarter — glad it pulled me in. Approving once the key lands.