# Implementation Report — Cycle 4: .NET 10 Migration

**Date**: 2026-05-12
**Cycle**: 4
**Feature**: AZ-500 — .NET 8 → .NET 10 migration
**Status**: COMPLETE

## Summary

Cycle 4 was a single-task feature cycle. AZ-500 migrates the entire SatelliteProvider solution from .NET 8 LTS to .NET 10:

- 9 csproj `TargetFramework` net8.0 → net10.0
- `global.json` SDK pin 8.0.0 → 10.0.0 (`rollForward=latestMinor`)
- 4 Docker base images (sdk / aspnet / runtime) bumped to `:10.0`
- 19 `Microsoft.AspNetCore.*` (8.0.25) and `Microsoft.Extensions.*` (9.0.10) packages → `10.0.7`
- 3 CI/script image refs (`scripts/run-tests.sh`, `scripts/run-performance-tests.sh:49` PERF_DLL path, `.woodpecker/01-test.yml`) updated to `:10.0` / `net10.0/`
- `Microsoft.AspNetCore.OpenApi 10.0.7` pulled in `Microsoft.OpenApi 2.x`, requiring `Swashbuckle.AspNetCore 9.x → 10.1.7` and source-side refactor of `Program.cs` + `Swagger/ParameterDescriptionFilter.cs` to the new namespace + types
- `Serilog.AspNetCore` retained at `8.0.3` (10.0.0 requires `Serilog.Sinks.File >= 7.0.0`, out of "no unrelated package bumps" scope) — documented in AGENTS.md
- `architecture.md` + `AGENTS.md` Tech Stack sections updated to `.NET 10`

## Acceptance Criteria — All 8 PASS

Detailed AC verification trace lives in `_docs/03_implementation/reviews/batch_01_cycle4_review.md` (AC Verification Trace section). Summary:

| AC | Result | Evidence |
|----|--------|----------|
| AC-1 — every csproj on net10.0 | PASS | `grep` over 9/9 csproj |
| AC-2 — global.json sdk.version=10.0.0 / latestMinor | PASS | file content |
| AC-3 — every docker/CI image on `:10.0` | PASS | `grep` over Dockerfiles + .yml + .sh |
| AC-4 — M.AspNetCore.* + M.Extensions.* on 10.0.7; Serilog.AspNetCore 8.0.3 fallback documented | PASS | csproj + AGENTS.md:244 |
| AC-5 — perf-bootstrap step succeeds (closes cycle-3 leftover) | PASS | `PERF_REPEAT_COUNT=2 PERF_UAV_BATCH_SIZE=2 ./scripts/run-performance-tests.sh` exit 1 (NOT 3 — bootstrap clean, build OK, JWT mint OK, PT-01..PT-07 PASS); leftover updated with new (non-SDK) PT-08 grep-pipefail bug |
| AC-6 — full test suite green | PASS | `./scripts/run-tests.sh --full` exit 0; 271/271 unit + full integration suite |
| AC-7 — `docker-compose build` succeeds with no downgrade/framework/missing-image warnings | PASS | both build paths verified; only warnings emitted are F1 ASPDEPR002 + F2 CS8604 (neither is "downgrade", "framework conflict", or "missing base image") |
| AC-8 — docs reflect .NET 10 | PASS | `architecture.md` lines 5 + 67 updated; `AGENTS.md` lines 9 + 240–244 updated |

## Code Review Verdict

**PASS_WITH_WARNINGS** — full report at `_docs/03_implementation/reviews/batch_01_cycle4_review.md`. 0 Critical, 0 High, 2 Medium (deferred per scope discipline), 1 Low (scope documentary).

## Product Implementation Completeness Gate

**PASS** — full report at `_docs/03_implementation/implementation_completeness_cycle4_report.md`. AZ-500 is a runtime/SDK/dependency migration with no new product behaviour. All named runtime dependencies (.NET 10, ASP.NET Core 10, JwtBearer, OpenApi, M.Extensions.*, Serilog) are integrated as production behaviour, not interfaces or fakes. End-to-end pipeline verified via integration suite + manual `docker compose up` probe (anonymous → 401, swagger → 200).

## Step 16 Final Test Run — HANDOFF to Step 11 (test-run skill)

Per `.cursor/skills/implement/SKILL.md` Step 16:

> If the next flow step is `Run Tests`, record a handoff in the final implementation report and let `.cursor/skills/test-run/SKILL.md` own the full-suite gate to avoid duplicate full runs.

The active autodev flow is `existing-code` Phase B; the next step after `Implement` (Step 10) is `Run Tests` (Step 11). To avoid duplicate full runs, **the implement skill defers the final full-suite execution to Step 11**.

**Prior in-cycle full run** — already executed during AC-6 verification:

- Command: `./scripts/run-tests.sh --full`
- Result: exit 0
- Step 0 (`dotnet format whitespace --verify-no-changes`): PASS
- Step 1 (unit tests): 271/271 passed in 4.2s
- Step 2 (integration tests via docker-compose with `--abort-on-container-exit --exit-code-from integration-tests`): exit 0; visible PASSED markers cover JWT auth (anonymous-401, expired-401, tampered-401, valid-200, wrong-iss-401, wrong-aud-401, swagger declares Bearer), UAV upload (happy-path-accepted, mixed-batch, both-source-coexist, same-source-UPSERT-collapsed, anonymous-401, no-permission-403, oversized-400), tile retrieval + reuse, region processing (queue + complete + CSV/summary/stitched), route management (simple route, route+region+stitch, route+tiles-zip, complex 10-points + 2-geofences ×2, extended 20-action-points)
- Coverage: written to `./TestResults/`

The Step 11 test-run skill should re-confirm via the same command (or its own runner-detected equivalent) and own the BLOCKING gate on test-run failures.

## Files Changed (21)

See `_docs/03_implementation/batch_01_cycle4_report.md` "Files Modified" section for the categorised list (12 build/project + 2 source + 3 scripts/CI + 2 docs + 2 process).

## Commit

- `8131363` `[AZ-500] .NET 8 -> .NET 10 migration` (pushed to `origin/dev`)

## Tracker

Jira AZ-500 transitioned: **In Progress → In Testing** (transition ID 32, `denyspopov.atlassian.net`).

## Follow-Up PBIs (Recommended; Out of AZ-500 Scope)

1. **`scripts/run-performance-tests.sh:416-417` grep-pipefail fix** (1 SP) — `grep -o ... | wc -l` → `grep -c ... || true`. Unblocks Step 15 (Performance Test) full-run + closes the cycle-3 perf leftover. Trace + suggested patch in `_docs/_process_leftovers/2026-05-12_perf-cycle3-harness-execution.md`.
2. **Migrate `WithOpenApi(...)` callsites to ASP.NET Core 10 minimal-API metadata extensions** (3 SP) — 8 callsites in `Program.cs` emit ASPDEPR002 obsolete-warning; future ASP.NET Core release will remove the API. Replace with `WithSummary` / `WithDescription` / `WithName`.
3. **Microsoft.OpenApi 2.x nullable cleanup** (1 SP) — covers F2 CS8604 in `ParameterDescriptionFilter.cs:25`. Trivial null-pattern guard.

These are recorded here for the Step 17 retrospective and for the next /new-task invocation; they are NOT created as task files in this cycle (per `coderule.mdc` "scope discipline" — surface and let the user decide).

## Cycle Status

`_docs/_autodev_state.md` will be updated by autodev to advance from Step 10 (Implement) → Step 11 (Run Tests).
