PATCHVERDICT.Candidate repairs. Recorded evidence.
New mission VERIFIED
Mission controldebug-normalization-01
Proof bundle

PATCH VERIFICATION MISSION

The username normalization utility does not remove surrounding whitespace or normalize casing consistently. Trim leading and trailing whitespace, return lowercase, and preserve internal characters.

Repositoryhttps://github.com/prahans/patchverdict-string-normalization.git
Execution status
COMPLETED
Base commit
5e42f38c3a6b639735c0af9c4ae60d4fad0ceb84
Changed files
1file
Investigation
3iterations
MISSION RECORDREASONING / EVIDENCE / VERDICT

Flight Recorder

15 events / UTC
  1. BASELINERunning reproduction test before patch
  2. BASELINEReported bug reproduced
  3. INVESTIGATINGAI investigation started
  4. INVESTIGATINGAI investigation completed
  5. PATCHINGAI patch phase started
  6. PATCHINGCandidate patch applied
  7. PATCHINGGit captured 1 changed file(s)
  8. PATCHINGGit diff captured
  9. PATCHINGVerification integrity preserved
  10. VERIFYINGRunning reproduction test after patch
  11. VERIFYINGReproduction test passes after patch
  12. VERIFYINGRunning full test suite
  13. VERIFYINGFull test suite passes
  14. VERDICTCalculating deterministic verdict
  15. COMPLETEDMission completed with verdict VERIFIED
Recorded execution eventsSAVED EVENTS

Proof Chain

RECORDED CHECKS
Evidence requirements6 passed
  1. Configured failure reproducedPassed · Baseline · exit 1
    01
  2. Candidate patch appliedPassed · 1 file changed
    02
  3. Git diff capturedPassed · Against 5e42f38
    03
  4. Integrity checksPassed · No recognized integrity concerns detected
    04
  5. Reproduction passes after patchPassed · Configured reproduction · exit 0
    05
  6. Repository test script passesPassed · Repository tests · exit 0
    06
REPAIR VERDICTVERIFIED
RECORDED VERDICT

Repair verdicts apply to the recorded requirements and execution.
Integrity checks detect recognized risks; they do not guarantee correctness.

Git evidence

Candidate patch

The candidate change captured from the sandbox working tree.

src/normalize-username.js
+1−1
diff --git a/src/normalize-username.js b/src/normalize-username.js
index 666422d..748e343 100644
--- a/src/normalize-username.js
+++ b/src/normalize-username.js
@@ -1,3 +1,3 @@
11 export function normalizeUsername(username) {
2− return username.toLowerCase();
2+ return username.trim().toLowerCase();
33 }
1 file changedBase 5e42f38

AI investigation report

AI REASONING

PROPOSED DIAGNOSIS

Investigation Report

The normalizeUsername utility in src/normalize-username.js only applies toLowerCase() and omits trimming whitespace. The authoritative baseline test failure shows that input ' Alice ' returned ' alice ' instead of the expected 'alice', confirming the missing .trim() call. Inspection of the implementation and test file confirms the mismatch between requirements and behavior.

Patch target
src/normalize-username.js
Test file
src/normalize-username.test.js
Reproduction command
npm test
3 investigation iterationsReasoning, not proof
Execution evidence

Verification evidence

Recorded command results. Expand a run to inspect its output.

Baseline reproduction

npm test
1.10sexit 1FAILURE REPRODUCED

stdout


> patchverdict-string-normalization@1.0.0 test
> vitest run


 RUN  v3.2.4 /tmp/patchverdict

 ❯ src/normalize-username.test.js (3 tests | 1 failed) 13ms
   × normalizeUsername > trims surrounding whitespace and lowercases the username 11ms
     → expected '  alice  ' to be 'alice' // Object.is equality
   ✓ normalizeUsername > lowercases uppercase usernames 0ms
   ✓ normalizeUsername > preserves internal characters 0ms

 Test Files  1 failed (1)
      Tests  1 failed | 2 passed (3)
   Start at  09:53:15
   Duration  265ms (transform 35ms, setup 0ms, collect 29ms, tests 13ms, environment 0ms, prepare 87ms)

stderr


⎯⎯⎯⎯⎯⎯⎯ Failed Tests 1 ⎯⎯⎯⎯⎯⎯⎯

 FAIL  src/normalize-username.test.js > normalizeUsername > trims surrounding whitespace and lowercases the username
AssertionError: expected '  alice  ' to be 'alice' // Object.is equality

Expected: "alice"
Received: "  alice  "

 ❯ src/normalize-username.test.js:6:44
      4| describe("normalizeUsername", () => {
      5|   it("trims surrounding whitespace and lowercases the username", () =>…
      6|     expect(normalizeUsername("  Alice  ")).toBe("alice");
       |                                            ^
      7|   });
      8| 

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯[1/1]⎯

Post-patch reproduction

npm test
1.90sexit 0PASS

stdout


> patchverdict-string-normalization@1.0.0 test
> vitest run


 RUN  v3.2.4 /tmp/patchverdict

 ✓ src/normalize-username.test.js (3 tests) 2ms

 Test Files  1 passed (1)
      Tests  3 passed (3)
   Start at  09:53:42
   Duration  253ms (transform 42ms, setup 0ms, collect 29ms, tests 2ms, environment 0ms, prepare 92ms)

stderr

(no output)

Repository test script

npm test
1.09sexit 0PASS

stdout


> patchverdict-string-normalization@1.0.0 test
> vitest run


 RUN  v3.2.4 /tmp/patchverdict

 ✓ src/normalize-username.test.js (3 tests) 2ms

 Test Files  1 passed (1)
      Tests  3 passed (3)
   Start at  09:53:43
   Duration  231ms (transform 41ms, setup 0ms, collect 45ms, tests 2ms, environment 0ms, prepare 81ms)

stderr

(no output)

Baseline labels reflect the configured failure expectation. Post-patch success uses exit code zero; the verdict also depends on patch and integrity checks.