For software & web development agencies
TWINJAM checks every Slack request, Jira ticket and pull request against the signed SOW, so the SSO flow nobody contracted arrives with a price instead of a weekend.
Dana Whitlock Thu 4:12 PM
Field crews keep asking for Sign in with Apple and Google. Can we add both before the first crews get the app?
Private to #pm-scope-alerts · RWU-FIELD
Assumption A-2 Authentication is email and password with optional MFA. Third-party identity providers are out of scope.
Where engineering margin goes
In fixed-fee engineering, the expensive requests rarely look expensive. They arrive as one-line Slack messages and turn into auth providers, new services and extra release cycles.
The client switches payment provider mid-build, or asks you to “also pull history from the old ERP”. A PR adds a new SDK and nobody connects it to the contract.
SSO, social login, role hierarchies and magic links. Each one touches security review, testing and the release pipeline.
Typical size: 20 to 60 hrs
“Can the export be a branded PDF?” “Can we add one more chart for the board?” Reports are the most common quiet add-on.
The contract says three UAT rounds. Round four starts because a new stakeholder joined. TWINJAM counts rounds and flags the one beyond the cap before it begins.
Real-world case walkthrough
Stackwell Labs signed a $96,000 fixed-fee contract to build a field inspection app for Ridgeway Utilities. By week four, burn was running ahead of delivered milestones. Here is what TWINJAM caught, and when.
Read the full Stackwell Labs storyPrepared for
Ridgeway Utilities
| Item | Hours | Amount |
|---|---|---|
| Sign in with Apple & Google SSOAssumption A-2 | 26 | $4,160 |
| Offline capture & background syncAssumption A-4 | 48 | $7,680 |
| Branded PDF compliance exportSOW §5.3 | 22 | $3,520 |
| Fourth staging QA roundSOW §7.1 | 19 | $3,040 |
The delivery lead uploads the signed SOW. TWINJAM extracts 31 deliverables, 9 exclusions and 12 technical assumptions, including online-first capture, email-and-password auth and three staging QA rounds. Review takes 12 minutes.
The client asks for Sign in with Apple and Google in the shared channel. The PM sees the flag in #pm-scope-alerts with assumption A-2 attached, and sends a priced option the next morning.
Change order$4,160
A Jira ticket for offline capture is created after a call. TWINJAM matches it against assumption A-4 and correlates a draft PR that adds a local database layer. The client signs in two days.
Change order$7,680
The SOW lists CSV and on-screen reports. The client wants a branded PDF for regulators. The PM offers it as a fixed-price add-on with the clause quoted.
Change order$3,520
A new UAT round is scheduled after a stakeholder change. TWINJAM flags it against the three-round cap, and the client approves it as a change order rather than an assumption.
Change order$3,040
All four change orders were signed for $18,400 across 115 hours at the contract rate of $160. The project closed on margin, and the mobile squad's unplanned weekend hours dropped sharply.
Engineering realization
Margin Telemetry reads time from Harvest, Toggl Track or Clockify and splits every sprint into contracted work, approved change orders and unbilled scope. Switch teams to see where realization moved after rollout.
Agencies in our onboarding audit reclaimed an average of 18.4% of project margin on fixed-fee work (TWINJAM onboarding audit, 2026).
Realization S11 to S13
82.1%
Realization S14 to S17
96.6%
Billed via change order
115 h
“Our developers no longer get roped into weekend marathons for client favors. That alone changed how the team feels about fixed-fee work.”
FAQ
TWINJAM reads pull request metadata through a read-only GitHub connection: titles, descriptions, labels, changed file paths and linked issues. That is enough to detect new modules, services or SDKs that fall outside contracted assumptions. It never trains models on your code or client IP.
Estimates come from comparable closed tickets in your own Jira or Linear history, adjusted by the role-based or blended rate on the contract. PMs can edit every estimate before a change order is sent.
No. Flags go to a private PM channel and the triage feed, not to engineers. Developers keep working in Jira, Linear and GitHub exactly as before.
Yes. If the SOW caps QA or UAT rounds, TWINJAM tracks them from Jira releases, labels or Slack and flags the request that would open a round beyond the cap.
Upload one live SOW and connect Slack and Jira. See the out-of-scope requests your engineers are building for free this sprint.
