WIP: docs(diffguard.toml.example): add tags and test_cases to rust.no_unwrap

[EffortlessSteven]

Closes #463

Summary

Adds missing tags and test_cases fields to rust.no_unwrap rule in diffguard.toml.example to demonstrate features that already exist in the codebase but were absent from the example file.

ADR

• ADR: adr.md (included in work item artifacts)
• Status: Accepted

Specs

• Specs: specs.md (included in work item artifacts)

What Changed

• diffguard.toml.example: Added tags = ["safety"] to rust.no_unwrap (consistent with built_in.json)
• diffguard.toml.example: Added two [[rule.test_cases]] blocks:
  • Positive case: input = "let x = y.unwrap();" with should_match = true
  • Negative case: input = "let x = y.ok();" with should_match = false

Test Results (so far)

• cargo run -p diffguard -- validate --config diffguard.toml.example passes ✓

Friction Encountered

• Prior agent created ADR/specs but did not apply the actual changes to diffguard.toml.example
• Had to implement the changes before creating PR
• PR WIP: docs(diffguard.toml.example): add tags and test_cases to rust.no_unwrap #608 was created by prior agent with wrong title/body (work-b9bc3149) but correct commits

Notes

• Draft PR — not ready for review until GREEN tests confirmed
• Work item: work-d4a75f70

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 591bc29d-6138-469e-82fd-a69e451a671f

📥 Commits

Reviewing files that changed from the base of the PR and between 3e1d9e1 and 2c59a64.

📒 Files selected for processing (12)

• crates/diffguard-analytics/src/lib.rs
• crates/diffguard-analytics/tests/edge_cases.rs
• crates/diffguard-core/tests/properties.rs
• crates/diffguard-diff/src/unified.rs
• crates/diffguard-domain/src/evaluate.rs
• crates/diffguard-domain/tests/red_tests_work_9dbac498.rs
• crates/diffguard-types/src/lib.rs
• crates/diffguard-types/tests/doc_markdown_fix.rs
• crates/diffguard-types/tests/green_edge_tests_work_2b446664.rs
• crates/diffguard-types/tests/properties.rs
• crates/diffguard-types/tests/red_tests_work_452a2701.rs
• diffguard.toml.example

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/work-d4a75f70/example-missing-testcases-tags

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[EffortlessSteven]

Snapshot Agent Findings

What This Change Does

Added tags = ["safety"] and two [[rule.test_cases]] blocks (positive and negative test cases) to the rust.no_unwrap rule in diffguard.toml.example.

Snapshots Written

Snapshot	Command	Description
snapshot_validate_example_config	validate --config diffguard.toml.example	Valid config with 3 rules
snapshot_test_example_config	test --config diffguard.toml.example	37 rules checked, 2 test cases passed
snapshot_explain_rust_no_unwrap	explain rust.no_unwrap	Rule details with patterns
snapshot_rules_example_config_head	rules --config diffguard.toml.example (first 50 lines)	Effective rules output

Coverage

• Covered: CLI outputs for validate, test, explain, and rules commands
• Not covered: Actual diff-checking behavior (requires git repository with diffs)

Test Results

✅ All 4 snapshot tests passing

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snapshot-agent