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Bump System.Text.Json from 10.0.12 to 10.0.13 - #451

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Bump System.Text.Json from 10.0.12 to 10.0.13#451
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dependabot/nuget/src/algorithm_exercises_csharp_base/System.Text.Json-10.0.13

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Updated System.Text.Json from 10.0.12 to 10.0.13.

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@dependabot
Bump System.Text.Json from 10.0.12 to 10.0.13
50d4024 
---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-version: 10.0.13
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added .NET Pull requests that update .net code dependencies Pull requests that update a dependency file labels Oct 13, 2026
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fossabot Bot commented Oct 13, 2026 •
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Needs Review

I recommend reviewing this upgrade before merging because an external CI security check from Snyk (security/snyk) is currently failing on this PR, and we cannot access its logs to determine the cause. While the upgrade itself is a patch-level bump — bringing 1 new feature and 2 bug fixes — and no breaking changes or validated security vulnerabilities are present, the failing Snyk check warrants manual investigation before merging. The package is declared as a direct dependency in algorithm_exercises_csharp_base.csproj but no active usage of its APIs (e.g., JsonSerializer, JsonDocument) was found in any .cs source files, suggesting the package may be present for transitive needs or future use. The upgrade itself appears low-risk, but the Snyk failure must be resolved or explained before the PR can be confidently marked safe.

Tip: Comment @​fossabot fix to attempt automatic fixes.

Fix Suggestions

We identified 2 fixable issues in this upgrade.

  • Investigate the failing security/snyk CI check — its logs are inaccessible externally and may flag a vulnerability in System.Text.Json 10.0.13 or its transitive graph
    Files: src/algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj
  • Remove unused dependency 'System.Text.Json' — not imported anywhere in the codebase
    Files: src/algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj

AI Assistant Prompt

Copy prompt for AI assistant 
# Fix Dependency Upgrade Issues: System.Text.Json in algorithm-exercises-csharp

## Context
PR #451 upgrades `System.Text.Json` (patch-level bump). The upgrade itself is low-risk, but there are two issues to address:

1. **Failing `security/snyk` CI check** - logs are external and inaccessible programmatically
2. **`System.Text.Json` appears to be unused** - no direct API usage found in any `.cs` files

## Issue 1: Investigate Unused Dependency (AI-Assisted)

Usage analysis found 0 references to `System.Text.Json` APIs (`JsonSerializer`, `JsonDocument`, `System.Text.Json` namespace) in any `.cs` source files.

**File:** `src/algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj`

### Steps:
1. First, confirm no usage exists:
   ```bash
   grep -rn 'System.Text.Json' --include='*.cs' --include='*.csproj' src/
   ```
2. Check if any other NuGet packages depend on it transitively:
   ```bash
   dotnet list src/algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj package --include-transitive
   ```
3. **If confirmed unused and not needed for transitive pinning:**
   - Remove the `<PackageReference Include="System.Text.Json" ... />` line from `algorithm_exercises_csharp_base.csproj`
   - Run `dotnet restore` to sync
   - Run `dotnet build` to verify the project still compiles
   - Run `dotnet test` to verify all tests pass

4. **If it IS needed as a transitive pin** (e.g., another package pulls it in and the explicit reference pins a secure version), leave it in place but add a comment explaining why:
   ```xml
   <!-- Pinned for security patching of transitive dependency -->
   <PackageReference Include="System.Text.Json" Version="..." />
   ```

## Issue 2: Failing Snyk CI Check (Manual)

This requires human investigation - a person must log into the Snyk dashboard to check the failure:
- **URL:** https://app.snyk.io/org/sir-gon/pr-checks/f671aaf3-33c2-4b41-b60f-df5940a2d9ee
- Determine if the failure is related to this `System.Text.Json` upgrade or a pre-existing issue
- If Snyk flags a vulnerability in `System.Text.Json` 10.0.13, consider whether removing the unused dependency (Issue 1) resolves it

## Summary of Changes Needed
| Priority | Action | File | Type |
|----------|--------|------|------|
| 1 | Check Snyk dashboard for failure cause | N/A | Manual |
| 2 | Verify `System.Text.Json` usage and remove if unused | `src/algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj` | AI-assisted |
| 3 | Run `dotnet restore && dotnet build && dotnet test` after changes | N/A | Verification |

What we checked

  • Direct PackageReference for System.Text.Json is declared here at the upgraded version. This is the only project file referencing this package. [1]
  • The main application project references algorithm_exercises_csharp_base as a ProjectReference, meaning it inherits the System.Text.Json dependency transitively but does not declare it directly. [2]
  • All projects target net8.0. This is compatible with System.Text.Json at the upgraded version, so no runtime framework incompatibility is expected. [3]
  • The security/snyk CI check is failing on this PR. As an unsupported external CI provider, its logs are inaccessible for analysis. The failure could relate to a vulnerability detected by Snyk in the new version of System.Text.Json or another package in the dependency graph, and must be investigated before merging. [4]

Dependency Usage

No usage of the analyzed dependencies was found in this repository.

View 1 more usage

Changes

System.Text.Json was updated with two bug fixes that ensure configured NuGet sources and package source mappings are properly honored during template updates and workload integrity checks. A new feature also enables package source mapping support for dotnet new install.

  • Merged PR 65305: Honor configured NuGet sources during template update (eb00bec) (v10.0.13, changelog)
  • Merged PR 65284: Honor package source mapping during workload integrity checks (32cd69c) (v10.0.13, changelog)
  • Merged PR 65248: Enable package source mapping for dotnet new install (2293cdf) (v10.0.13, changelog)
View 9 more changes
References (4)

[1]: Direct PackageReference for System.Text.Json is declared here at the upgraded version. This is the only project file referencing this package.

algorithm-exercises-csharp/src/algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj

Line 35 in 50d4024

<PackageReference Include="System.Text.Json" Version="10.0.13" />

[2]: The main application project references algorithm_exercises_csharp_base as a ProjectReference, meaning it inherits the System.Text.Json dependency transitively but does not declare it directly.

algorithm-exercises-csharp/src/algorithm_exercises_csharp/algorithm_exercises_csharp.csproj

Line 22 in 50d4024

<ProjectReference Include="../algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj" />

[3]: All projects target net8.0. This is compatible with System.Text.Json at the upgraded version, so no runtime framework incompatibility is expected.

algorithm-exercises-csharp/src/algorithm_exercises_csharp_base/algorithm_exercises_csharp_base.csproj

Line 4 in 50d4024

<TargetFramework>net8.0</TargetFramework>

[4]: The security/snyk CI check is failing on this PR. As an unsupported external CI provider, its logs are inaccessible for analysis. The failure could relate to a vulnerability detected by Snyk in the new version of System.Text.Json or another package in the dependency graph, and must be investigated before merging. (source link)

fossabot analyzed this PR using dependency research and AI. View this analysis on the web

@fossabot

fossabot Bot commented Oct 13, 2026 •
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@fossabot

fossabot Bot commented Oct 13, 2026 •
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No Issues

No security issues were detected in the SAST scan. The code changes appear to follow secure coding practices.

fossabot analyzed this PR using SAST security analysis and AI (changed files only).

@codecov

codecov Bot commented Oct 13, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0453b63) to head (50d4024).

Additional details and impacted files 
@@            Coverage Diff            @@
##              main      #451   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           36        36           
  Lines          731       731           
  Branches        94        94           
=========================================
  Hits           731       731

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

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  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

@sonarqubecloud

sonarqubecloud Bot commented Oct 13, 2026

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Quality Gate Passed Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

@dependabot @github

dependabot Bot commented on behalf of github Oct 13, 2026

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Looks like System.Text.Json is no longer updatable, so this is no longer needed.

@dependabot dependabot Bot closed this Oct 13, 2026
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dependabot Bot deleted the dependabot/nuget/src/algorithm_exercises_csharp_base/System.Text.Json-10.0.13 branch October 13, 2026 22:04
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