docs(backlog): add showcase quality working backlog

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| Topic | File | Use |
|---|---|---|
| AI excellence due diligence | [ai-excellence-due-diligence-roadmap.md](/home/hartmut/Documents/Copilot/capakraken/docs/ai-excellence-due-diligence-roadmap.md) | Frank quality assessment and cleanup roadmap toward a showcase AI-built project |
| Showcase quality backlog | [showcase-quality-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/showcase-quality-backlog.md) | Consolidated working backlog for the current quality and maintainability north star |
| Target CI/CD architecture | [cicd-target-architecture.md](/home/hartmut/Documents/Copilot/capakraken/docs/cicd-target-architecture.md) | Canonical image-based build, deploy, and rollback flow |
| Active roadmap and open gaps | [product-roadmap.md](/home/hartmut/Documents/Copilot/capakraken/docs/product-roadmap.md) | Primary backlog and current delivery order |
| Estimating system design | [estimating-extension-design.md](/home/hartmut/Documents/Copilot/capakraken/docs/estimating-extension-design.md) | Workbook analysis, field mapping, and implementation plan |
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# Showcase Quality Backlog
**Date:** 2026-04-01
**Purpose:** Canonical working backlog for the current north star: turn CapaKraken into a clean, reviewable, deterministic reference project for disciplined AI-assisted software engineering.
## North Star
The goal is not "ship more code at any cost".
The goal is:
- small ownership surfaces
- deterministic behavior and repeatable tests
- explicit permission and runtime boundaries
- clean deploy and rollback discipline
- documentation that makes the structure explainable
- visible engineering quality that holds up under fast AI-assisted change
## Canonical Inputs
This backlog consolidates the still-relevant work from:
- [ai-excellence-due-diligence-roadmap.md](/home/hartmut/Documents/Copilot/capakraken/docs/ai-excellence-due-diligence-roadmap.md)
- [architecture-hardening-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/architecture-hardening-backlog.md)
- [domain-slices-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/domain-slices-backlog.md)
- [api-router-procedure-support-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/api-router-procedure-support-backlog.md)
## Working Rules
- Every touched slice must gain regression coverage for edge, guard, or failure cases, not only happy paths.
- Prefer narrow, verifiable slices over broad refactors.
- Keep public contracts stable unless a product decision explicitly changes them.
- Avoid expanding architecture surface area while the current worktree is dirty or shared ownership is unclear.
## Current Baseline
Already materially improved:
- SSE audience scoping is under CI guardrails.
- runtime secret handling is environment-first
- assistant-tool and several router monoliths were decomposed
- image-based CI/CD and deploy flow exists
- focused test coverage around several high-risk paths has been expanded
Still open at the quality-showcase level:
- Timeline UX and live-update stability are not yet "boringly reliable".
- Some large frontend/API ownership surfaces are still too wide.
- measurable architecture and quality guardrails are not complete yet
- operational discipline still depends too much on convention and current context
## Priority Stack
### P0. Worktree Hygiene And Deterministic Test Discipline
Status: active, always-on
Done means:
- no generated or accidental artifacts stay tracked
- shared worktree changes are either validated, isolated, or explicitly left untouched
- every touched regression suite covers at least one non-happy-path case
- time- and timezone-sensitive tests are stabilized
Immediate checks:
- keep the current timeline WIP isolated until it is either validated or cleaned
- continue tightening router/read-model tests where fragile assumptions still exist
### P1. Timeline Interaction, Overlay, And SSE Stability
Status: active
Source: [domain-slices-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/domain-slices-backlog.md)
Remaining work:
- finish popover, hover, drag, and overlay stability across scroll, resize, reload, and view changes
- verify first-load, reconnect, and live-update behavior under SSE churn
- close remaining timeline test gaps with explicit edge/failure cases
- clean up the current timeline component worktree safely before broadening scope
Definition of done:
- timeline popovers and overlays behave consistently under scroll/resize/reload
- drag and selection interactions do not fight each other
- SSE reconnects do not leave the UI in a stale or empty state
### P2. Holiday/Vacation Correctness And Explainability Parity
Status: active
Source: [domain-slices-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/domain-slices-backlog.md)
Remaining work:
- close the remaining forecast/widget parity gaps for holiday-/vacation-aware derivations
- ensure UI, assistant, dashboard detail, and export views expose the same calculation basis
- keep explainability compact by default and detailed only when explicitly requested
Definition of done:
- the same holiday/vacation logic is visible and test-backed across API, assistant, widgets, and exports
### P3. Resource Read Decomposition And Smaller Ownership Surfaces
Status: next structural cleanup
Sources:
- [api-router-procedure-support-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/api-router-procedure-support-backlog.md)
- [ai-excellence-due-diligence-roadmap.md](/home/hartmut/Documents/Copilot/capakraken/docs/ai-excellence-due-diligence-roadmap.md)
Remaining work:
- split `resource-read-shared.ts` into focused read helpers without changing public contracts
- continue shrinking large timeline/frontend modules into easier ownership units
- keep top-level routers/components thin and orchestration-only
Definition of done:
- the next deep read-model hotspot is decomposed
- large ownership surfaces become easier to review and test in isolation
### P4. Notification/Task/Broadcast Reliability Residuals
Status: active but below timeline/resource cleanup
Source: [domain-slices-backlog.md](/home/hartmut/Documents/Copilot/capakraken/docs/domain-slices-backlog.md)
Remaining work:
- close the last persistence and fanout edge cases
- keep error translation stable and domain-shaped under missing-reference races
- continue moving complex orchestration toward narrower support helpers where useful
Definition of done:
- reminder, broadcast, and task workflows fail cleanly and predictably under missing-reference and retry scenarios
### P5. Measurable Guardrails In CI
Status: open
Source: [ai-excellence-due-diligence-roadmap.md](/home/hartmut/Documents/Copilot/capakraken/docs/ai-excellence-due-diligence-roadmap.md)
Remaining work:
- add file-size or ownership-surface guardrails for critical source files
- add stronger auth/permission regression coverage around sensitive routers
- add measurable package-level quality gates beyond "tests pass"
- monitor web bundle or route size where growth risk is known
Definition of done:
- CI can fail for structural regressions, not only syntax or unit failures
### P6. Operational Standardization
Status: open
Source: [ai-excellence-due-diligence-roadmap.md](/home/hartmut/Documents/Copilot/capakraken/docs/ai-excellence-due-diligence-roadmap.md)
Remaining work:
- make Redis-backed rate limiting an intentional deployed default, not a best-effort fallback
- document and rehearse one rollback path
- finish deploy/bootstrap/cleanup discipline around runtime secrets and environment-backed config
Definition of done:
- one production path, one rollback path, one runtime config source of truth
### P7. Reference-Project Artifacts
Status: open
Source: [ai-excellence-due-diligence-roadmap.md](/home/hartmut/Documents/Copilot/capakraken/docs/ai-excellence-due-diligence-roadmap.md)
Remaining work:
- add an engineering doctrine for AI-assisted changes
- add explicit AI collaboration standards for file growth, tests, and docs
- curate a small set of exemplary slices that demonstrate the intended standards end to end
Suggested artifacts:
- `docs/engineering-doctrine.md`
- `docs/ai-collaboration-standards.md`
- reference-slice documentation for one API slice and one frontend slice
## Practical Order From Here
If the goal is to keep momentum without widening risk, the recommended execution order is:
1. finish or safely isolate the current Timeline worktree changes
2. continue non-happy-path coverage on touched timeline/resource reads
3. complete the remaining holiday/vacation parity gaps
4. decompose `resource-read-shared.ts`
5. return to residual notification reliability edges
6. add the next CI guardrail instead of another broad refactor
## Exit Criteria For This Backlog
This backlog is complete when:
- the main UX-critical surfaces are stable under edge conditions
- the next major oversized ownership surfaces are reduced
- quality is enforced by CI guardrails, not memory
- operations are repeatable and documented
- the repository visibly demonstrates disciplined AI-assisted engineering rather than just fast iteration