A clearly scoped story is added to an existing application — broken into individual, manageable slices instead of loading the entire codebase at once.
Case study in full
Synthetic example — illustrative magnitudes, not a measurement.
Stack profile: typescript-node-20-express · Data origin: Synthetic example, not a reference run. · Measurement period: —
An existing application is to gain one clearly scoped story — for example an additional API field with matching validation and persistence. The codebase is too large to load in full for a single editing step; the change instead has to break down into individual, manageable slices.
Out of scope — not automated: Not automated: formulating the story and prioritizing it in the tracker remain a human decision, as does approving the plan before execution and the merge decision at the end.
Prerequisites
A tracker connected to the repository, holding the story to be worked.
A stack profile describing language, framework and layering of the existing code.
Guardrails for the existing conventions (naming, layer boundaries, test obligation).
Approval of the plan derived from the story by a project member.
Workflow
The story is read from the tracker and broken down into a plan with individual slices.
Each slice touches one bounded portion of the codebase, without loading the entire codebase.
Implementation and validation run per slice, with tests for the new code path.
Slices that fail validation are reworked before they flow into the overall state.
The result goes out as a pull request to the repository, linked to the original story.
Result artifacts
New and changed files per slice, traceable in the commit history.
Tests run and their status documented per slice.
One pull request referencing the originating story in the tracker.
Feedback on whether the change was accepted or needs further rework.
Key figures
Scope
Stories/tickets
1
Slices
7
Files/modules
19
Throughput
Validated slices
7
Retries
2
Human approvals
2
Quality
Checks run
Unit Tests, Integration Tests, Lint
Gates passed
4
Gates failed
0
Remaining debt
No open debt recorded for this slice.
Resources — no pricing
Prompt tokens
100000
Completion tokens
40000
Cache tokens
130000
Model calls
40
Sandbox runtime
15 minutes
Model/stack context
Stack: Node.js with TypeScript, layered architecture (profile typescript-node-express-layered).
Every example on this page was created for illustration. It is not a promise about the duration, quality or cost of a future run of your own — your own figures appear in the cockpit after logging in, within your own tenant context.
