PRAWN — RECORDED LOCAL REPAIR
Recorded 14 October 2026. One deliberately broken missing-import fixture.
The video replays captured output with reading pauses; it is not real-time screen footage.
Local paths are replaced with [demo]. Test output and source bytes are otherwise unchanged.
An initial transport request used an unsupported tool alias and was rejected before repair.
The corrected request below was the only repair invocation for this fixture.

ORIGINAL SOURCE — digest.mjs
export function sha256(text) {
  return createHash('sha256').update(text, 'utf8').digest('hex');
}

BASELINE: node --test --test-reporter=tap digest.test.mjs
TAP version 13
# Subtest: empty input matches the standard SHA-256 vector
not ok 1 - empty input matches the standard SHA-256 vector
  ---
  duration_ms: 0.653792
  location: '[demo]/digest.test.mjs:5:1'
  failureType: 'testCodeFailure'
  error: 'createHash is not defined'
  code: 'ERR_TEST_FAILURE'
  name: 'ReferenceError'
  stack: |-
    sha256 (file://[demo]/digest.mjs:2:3)
    TestContext.<anonymous> (file://[demo]/digest.test.mjs:6:16)
    Test.runInAsyncScope (node:async_hooks:206:9)
    Test.run (node:internal/test_runner/test:796:25)
    Test.processPendingSubtests (node:internal/test_runner/test:526:18)
    node:internal/test_runner/harness:255:12
    node:internal/process/task_queues:140:7
    AsyncResource.runInAsyncScope (node:async_hooks:206:9)
    AsyncResource.runMicrotask (node:internal/process/task_queues:137:8)
  ...
# Subtest: abc matches the standard SHA-256 vector
not ok 2 - abc matches the standard SHA-256 vector
  ---
  duration_ms: 0.059875
  location: '[demo]/digest.test.mjs:9:1'
  failureType: 'testCodeFailure'
  error: 'createHash is not defined'
  code: 'ERR_TEST_FAILURE'
  name: 'ReferenceError'
  stack: |-
    sha256 (file://[demo]/digest.mjs:2:3)
    TestContext.<anonymous> (file://[demo]/digest.test.mjs:10:16)
    Test.runInAsyncScope (node:async_hooks:206:9)
    Test.run (node:internal/test_runner/test:796:25)
    Test.processPendingSubtests (node:internal/test_runner/test:526:18)
    Test.postRun (node:internal/test_runner/test:889:19)
    Test.run (node:internal/test_runner/test:835:12)
    async Test.processPendingSubtests (node:internal/test_runner/test:526:7)
  ...
# Subtest: repeated calls are deterministic and input-sensitive
not ok 3 - repeated calls are deterministic and input-sensitive
  ---
  duration_ms: 0.053958
  location: '[demo]/digest.test.mjs:13:1'
  failureType: 'testCodeFailure'
  error: 'createHash is not defined'
  code: 'ERR_TEST_FAILURE'
  name: 'ReferenceError'
  stack: |-
    sha256 (file://[demo]/digest.mjs:2:3)
    TestContext.<anonymous> (file://[demo]/digest.test.mjs:14:16)
    Test.runInAsyncScope (node:async_hooks:206:9)
    Test.run (node:internal/test_runner/test:796:25)
    Test.processPendingSubtests (node:internal/test_runner/test:526:18)
    Test.postRun (node:internal/test_runner/test:889:19)
    Test.run (node:internal/test_runner/test:835:12)
    async Test.processPendingSubtests (node:internal/test_runner/test:526:7)
  ...
1..3
# tests 3
# suites 0
# pass 0
# fail 3
# cancelled 0
# skipped 0
# todo 0
# duration_ms 47.447875

Exit code: 1

REPAIR SETTINGS
{
  "targetFile": "digest.mjs",
  "testCommand": "node --test --test-reporter=tap digest.test.mjs",
  "applyFix": true,
  "compactResponse": true,
  "allowCloudEscalation": false,
  "allowLocalModel": true,
  "contextFiles": [
    "digest.test.mjs"
  ]
}

REPAIR RESULT
{
  "kind": "TIER0_VERIFIED_APPLIED",
  "verification": "PASS",
  "applied": true,
  "targetFile": "digest.mjs",
  "repairsApplied": [
    "AUTO_IMPORTED_NODE_CRYPTO"
  ],
  "executionMs": 1,
  "originalSha256": "fca9112db4b11b97b5f58d6e996119bc391e0e43264cee37daad8826dd7ba2b1",
  "replacementCode": "import { createHash } from 'node:crypto';\n\nexport function sha256(text) {\n  return createHash('sha256').update(text, 'utf8').digest('hex');\n}\n",
  "replacementSha256": "393856b0d1ca7c70ce28cdc8ab1fcd2a1ce3a309594c5cdba9c6773914dab43a"
}

PATCH
--- before/digest.mjs
+++ after/digest.mjs
@@ -1,3 +1,5 @@
+import { createHash } from 'node:crypto';
+
 export function sha256(text) {
   return createHash('sha256').update(text, 'utf8').digest('hex');
 }

INDEPENDENT RERUN: node --test --test-reporter=tap digest.test.mjs
TAP version 13
# Subtest: empty input matches the standard SHA-256 vector
ok 1 - empty input matches the standard SHA-256 vector
  ---
  duration_ms: 0.598209
  ...
# Subtest: abc matches the standard SHA-256 vector
ok 2 - abc matches the standard SHA-256 vector
  ---
  duration_ms: 0.050291
  ...
# Subtest: repeated calls are deterministic and input-sensitive
ok 3 - repeated calls are deterministic and input-sensitive
  ---
  duration_ms: 0.135167
  ...
1..3
# tests 3
# suites 0
# pass 3
# fail 0
# cancelled 0
# skipped 0
# todo 0
# duration_ms 30.035

Exit code: 0

MEASUREMENTS AND LIMITS
{
  "runId": "prawn-demo-20261014",
  "baseline": {
    "tests": 3,
    "passed": 0,
    "failed": 3,
    "exitCode": 1
  },
  "independentVerification": {
    "tests": 3,
    "passed": 3,
    "failed": 0,
    "exitCode": 0
  },
  "testsUnchanged": true,
  "repairKind": "TIER0_VERIFIED_APPLIED",
  "engineReportedTransformMs": 1,
  "measuredMcpCallMs": 61.495,
  "independentTestMs": 54.756,
  "afterSha256": "393856b0d1ca7c70ce28cdc8ab1fcd2a1ce3a309594c5cdba9c6773914dab43a",
  "cloudModelRequests": 0,
  "repairApiSpendUsd": 0,
  "comparativeSavings": "not measured",
  "limitations": "One synthetic missing-import fixture, not general repair accuracy, production safety, rollback verification or client compatibility. Transform timing excludes transport and tests. Recording includes readability pauses."
}