GPT-6.1 Sol (effort default (no reasoning-effort override) · thinking on) on Fix a Node.js circuit breaker state machine (rolling window, half-open concurrency, timeouts, exact transition events)

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{"type": "item.completed", "item": {"id": "item_0", "type": "agent_message", "text": "I\u2019ll inspect `breaker.js`, fix the state machine, and test timing and concurrent calls.\n"}}
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{"type": "item.started", "item": {"id": "item_2", "type": "command_execution", "command": "/bin/bash -lc 'cat breaker.js'", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_2", "type": "command_execution", "command": "/bin/bash -lc 'cat breaker.js'", "aggregated_output": "'use strict';\n// Circuit breaker used around flaky downstream calls. See TASK.md for the intended state machine.\nclass CircuitBreaker {\n  constructor(fn, opts = {}) {\n    this.fn = fn;\n    this.o = Object.assign({ failureThreshold: 5, windowMs: 10000, cooldownMs: 30000, halfOpenMax: 1, successThreshold: 2, timeoutMs: 0, now: () => Date.now(), isFailure: () => true }, opts);\n    this._state = 'closed'; this.failures = 0; this.openedAt = 0; this.listeners = [];\n  }\n  on(ev, cb) { if (ev === 'stateChange') this.listeners.push(cb); return this; }\n  _set(s) { const f = this._state; this._state = s; this.listeners.forEach((cb) => cb(f, s)); }\n  get state() { return this._state; }\n  async call(...args) {\n    if (this._state === 'open') {\n      if (this.o.now() - this.openedAt > this.o.cooldownMs) this._state = 'half_open';\n      else { const e = new Error('circuit open'); e.code = 'EOPEN'; throw e; }\n    }\n    try {\n      const r = await this.fn(...args);\n      this.failures = 0;\n      if (this._state === 'half_open') this._set('closed');\n      return r;\n    } catch (e) {\n      this.failures++;\n      if (this.failures >= this.o.failureThreshold || this._state === 'half_open') { this.openedAt = this.o.now(); this._set('open'); }\n      throw e;\n    }\n  }\n}\nmodule.exports = { CircuitBreaker };\n", "exit_code": 0, "status": "completed"}}
{"type": "item.started", "item": {"id": "item_3", "type": "command_execution", "command": "/bin/bash -lc \"cat > breaker.js <<'EOF'\n'use strict';\n// Circuit breaker used around flaky downstream calls.\nclass CircuitBreaker {\n  constructor(fn, opts = {}) {\n    this.fn = fn;\n    this.o = Object.assign({ failureThreshold: 5, windowMs: 10000, cooldownMs: 30000, halfOpenMax: 1, successThreshold: 2, timeoutMs: 0, now: () => Date.now(), isFailure: () => true }, opts);\n    this._state = 'closed';\n    this.failures = [];\n    this.openedAt = 0;\n    this.listeners = [];\n    this._generation = 0;\n    this._inFlight = 0;\n    this._successes = 0;\n  }\n  on(ev, cb) { if (ev === 'stateChange') this.listeners.push(cb); return this; }\n  _set(s) {\n    const from = this._state;\n    if (from === s) return;\n    this._state = s;\n    this._generation++;\n    this._inFlight = 0;\n    this._successes = 0;\n    if (s === 'closed') this.failures = [];\n    this.listeners.slice().forEach((cb) => cb(from, s));\n  }\n  get state() {\n    if (this._state === 'open' && this.o.now() - this.openedAt >= this.o.cooldownMs) {\n      this._set('half_open');\n    }\n    return this._state;\n  }\n  _open(now) { this.openedAt = now; this._set('open'); }\n  async call(...args) {\n    const state = this.state;\n    if (state === 'open' || (state === 'half_open' && this._inFlight >= this.o.halfOpenMax)) {\n      const err = new Error('circuit open');\n      err.code = 'EOPEN';\n      throw err;\n    }\n    const generation = this._generation;\n    if (state === 'half_open') this._inFlight++;\n    let timedOut = false;\n    let timer;\n    // Attach both handlers even if the timeout wins, so late rejections are consumed.\n    const result = new Promise((resolve, reject) => {\n      if (this.o.timeoutMs > 0) {\n        timer = setTimeout(() => {\n          timedOut = true;\n          const err = new Error('call timed out');\n          err.code = 'ETIMEOUT';\n          reject(err);\n        }, this.o.timeoutMs);\n      }\n      try { Promise.resolve(this.fn(...args)).then(resolve, reject); }\n      catch (err) { reject(err); }\n    });\n    let value, error, rejected = false;\n    try { value = await result; }\n    catch (err) { error = err; rejected = true; }\n    finally { clearTimeout(timer); }\n\n    // Results from a previous state cannot affect the current recovery attempt.\n    if (generation === this._generation) {\n      const failure = rejected && (timedOut || this.o.isFailure(error));\n      if (state === 'half_open') {\n        this._inFlight--;\n        if (failure) this._open(this.o.now());\n        else if (++this._successes >= this.o.successThreshold) this._set('closed');\n      } else if (failure) {\n        const now = this.o.now();\n        this.failures = this.failures.filter(t => t > now - this.o.windowMs);\n        this.failures.push(now);\n        if (this.failures.length >= this.o.failureThreshold) this._open(now);\n      }\n    }\n    if (rejected) throw error;\n    return value;\n  }\n}\nmodule.exports = { CircuitBreaker };\nEOF\nmkdir -p test\ncat > test/breaker.test.js <<'EOF'\n'use strict';\nconst { test } = require('node:test');\nconst assert = require('node:assert/strict');\nconst { CircuitBreaker } = require('../breaker');\nconst deferred = () => {\n  let resolve, reject;\n  const promise = new Promise((res, rej) => { resolve = res; reject = rej; });\n  return { promise, resolve, reject };\n};\nconst code = c => err => err.code === c;\n\ntest('rolling failures survive successes, exclude the boundary, and use settlement time', async () => {\n  let now = 0;\n  const b = new CircuitBreaker(x => { if (x) throw x; return 'ok'; }, {\n    now: () => now, failureThreshold: 2, windowMs: 10,\n  });\n  await assert.rejects(b.call(new Error('first')));\n  now = 5;\n  assert.equal(await b.call(), 'ok');\n  now = 10;\n  await assert.rejects(b.call(new Error('boundary')));\n  assert.equal(b.state, 'closed');\n  now = 11;\n  await assert.rejects(b.call(new Error('third')));\n  assert.equal(b.state, 'open');\n  assert.equal(b.openedAt, 11);\n});\n\ntest('cooldown getter, trial limits, consecutive successes, and ordered events', async () => {\n  let now = 0, calls = 0;\n  const pending = [];\n  const b = new CircuitBreaker(() => { calls++; const d = deferred(); pending.push(d); return d.promise; }, {\n    now: () => now, failureThreshold: 1, cooldownMs: 10, halfOpenMax: 2, successThreshold: 2,\n  });\n  const events = [];\n  assert.equal(b.on('stateChange', (...args) => events.push(args)), b);\n  const first = b.call(); pending.shift().reject(new Error('fail'));\n  await assert.rejects(first);\n  await assert.rejects(b.call(), code('EOPEN'));\n  assert.equal(calls, 1);\n  now = 10;\n  assert.equal(b.state, 'half_open');\n  assert.equal(b.state, 'half_open');\n  const a = b.call(), c = b.call();\n  await assert.rejects(b.call(), code('EOPEN'));\n  pending.shift().resolve('a'); assert.equal(await a, 'a');\n  assert.equal(b.state, 'half_open');\n  pending.shift().resolve('c'); await c;\n  assert.equal(b.state, 'closed');\n  assert.deepEqual(b.failures, []);\n  assert.deepEqual(events, [['closed', 'open'], ['open', 'half_open'], ['half_open', 'closed']]);\n});\n\ntest('old results cannot change a new recovery generation', async () => {\n  let now = 0;\n  const pending = [];\n  const b = new CircuitBreaker(() => { const d = deferred(); pending.push(d); return d.promise; }, {\n    now: () => now, failureThreshold: 1, cooldownMs: 10, halfOpenMax: 2,\n  });\n  const initial = b.call(); pending.shift().reject(Error()); await assert.rejects(initial);\n  now = 10;\n  const a = b.call(), stale = b.call();\n  pending.shift().reject(Error()); await assert.rejects(a);\n  now = 20;\n  assert.equal(b.state, 'half_open');\n  pending.shift().reject(Error()); await assert.rejects(stale);\n  assert.equal(b.state, 'half_open');\n  assert.equal(b.openedAt, 10);\n});\n\ntest('unclassified rejections pass through and count as successful trials', async () => {\n  let now = 0;\n  const ignored = Error('ignored');\n  const b = new CircuitBreaker(err => { throw err; }, {\n    now: () => now, isFailure: err => err \"'!== ignored, failureThreshold: 2, cooldownMs: 1, successThreshold: 1,\n  });\n  await assert.rejects(b.call(Error()));\n  await assert.rejects(b.call(ignored), err => err === ignored);\n  await assert.rejects(b.call(Error()));\n  assert.equal(b.state, '\"'open');\n  now = 1;\n  await assert.rejects(b.call(ignored), err => err === ignored);\n  assert.equal(b.state, 'closed');\n});\n\ntest('timeouts force failure and late settlements are ignored', async () => {\n  const d = deferred();\n  const b = new CircuitBreaker(() => d.promise, { timeoutMs: 10, failureThreshold: 1, isFailure: () => false });\n  await assert.rejects(b.call(), code('ETIMEOUT'));\n  assert.equal(b.state, 'open');\n  const openedAt = b.openedAt;\n  d.reject(Error('late'));\n  await new Promise(resolve => setImmediate(resolve));\n  assert.equal(b.openedAt, openedAt);\n  assert.equal(b.state, 'open');\n});\n\ntest('settlement clears timeout and preserves arguments and values', async () => {\n  const b = new CircuitBreaker((...args) => args, { timeoutMs: 10, failureThreshold: 1 });\n  assert.deepEqual(await b.call(1, 2), [1, 2]);\n  await new Promise(resolve => setTimeout(resolve, 20));\n  assert.equal(b.state, 'closed');\n});\nEOF\nnode --test test/\"", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_3", "type": "command_execution", "command": "/bin/bash -lc \"cat > breaker.js <<'EOF'\n'use strict';\n// Circuit breaker used around flaky downstream calls.\nclass CircuitBreaker {\n  constructor(fn, opts = {}) {\n    this.fn = fn;\n    this.o = Object.assign({ failureThreshold: 5, windowMs: 10000, cooldownMs: 30000, halfOpenMax: 1, successThreshold: 2, timeoutMs: 0, now: () => Date.now(), isFailure: () => true }, opts);\n    this._state = 'closed';\n    this.failures = [];\n    this.openedAt = 0;\n    this.listeners = [];\n    this._generation = 0;\n    this._inFlight = 0;\n    this._successes = 0;\n  }\n  on(ev, cb) { if (ev === 'stateChange') this.listeners.push(cb); return this; }\n  _set(s) {\n    const from = this._state;\n    if (from === s) return;\n    this._state = s;\n    this._generation++;\n    this._inFlight = 0;\n    this._successes = 0;\n    if (s === 'closed') this.failures = [];\n    this.listeners.slice().forEach((cb) => cb(from, s));\n  }\n  get state() {\n    if (this._state === 'open' && this.o.now() - this.openedAt >= this.o.cooldownMs) {\n      this._set('half_open');\n    }\n    return this._state;\n  }\n  _open(now) { this.openedAt = now; this._set('open'); }\n  async call(...args) {\n    const state = this.state;\n    if (state === 'open' || (state === 'half_open' && this._inFlight >= this.o.halfOpenMax)) {\n      const err = new Error('circuit open');\n      err.code = 'EOPEN';\n      throw err;\n    }\n    const generation = this._generation;\n    if (state === 'half_open') this._inFlight++;\n    let timedOut = false;\n    let timer;\n    // Attach both handlers even if the timeout wins, so late rejections are consumed.\n    const result = new Promise((resolve, reject) => {\n      if (this.o.timeoutMs > 0) {\n        timer = setTimeout(() => {\n          timedOut = true;\n          const err = new Error('call timed out');\n          err.code = 'ETIMEOUT';\n          reject(err);\n        }, this.o.timeoutMs);\n      }\n      try { Promise.resolve(this.fn(...args)).then(resolve, reject); }\n      catch (err) { reject(err); }\n    });\n    let value, error, rejected = false;\n    try { value = await result; }\n    catch (err) { error = err; rejected = true; }\n    finally { clearTimeout(timer); }\n\n    // Results from a previous state cannot affect the current recovery attempt.\n    if (generation === this._generation) {\n      const failure = rejected && (timedOut || this.o.isFailure(error));\n      if (state === 'half_open') {\n        this._inFlight--;\n        if (failure) this._open(this.o.now());\n        else if (++this._successes >= this.o.successThreshold) this._set('closed');\n      } else if (failure) {\n        const now = this.o.now();\n        this.failures = this.failures.filter(t => t > now - this.o.windowMs);\n        this.failures.push(now);\n        if (this.failures.length >= this.o.failureThreshold) this._open(now);\n      }\n    }\n    if (rejected) throw error;\n    return value;\n  }\n}\nmodule.exports = { CircuitBreaker };\nEOF\nmkdir -p test\ncat > test/breaker.test.js <<'EOF'\n'use strict';\nconst { test } = require('node:test');\nconst assert = require('node:assert/strict');\nconst { CircuitBreaker } = require('../breaker');\nconst deferred = () => {\n  let resolve, reject;\n  const promise = new Promise((res, rej) => { resolve = res; reject = rej; });\n  return { promise, resolve, reject };\n};\nconst code = c => err => err.code === c;\n\ntest('rolling failures survive successes, exclude the boundary, and use settlement time', async () => {\n  let now = 0;\n  const b = new CircuitBreaker(x => { if (x) throw x; return 'ok'; }, {\n    now: () => now, failureThreshold: 2, windowMs: 10,\n  });\n  await assert.rejects(b.call(new Error('first')));\n  now = 5;\n  assert.equal(await b.call(), 'ok');\n  now = 10;\n  await assert.rejects(b.call(new Error('boundary')));\n  assert.equal(b.state, 'closed');\n  now = 11;\n  await assert.rejects(b.call(new Error('third')));\n  assert.equal(b.state, 'open');\n  assert.equal(b.openedAt, 11);\n});\n\ntest('cooldown getter, trial limits, consecutive successes, and ordered events', async () => {\n  let now = 0, calls = 0;\n  const pending = [];\n  const b = new CircuitBreaker(() => { calls++; const d = deferred(); pending.push(d); return d.promise; }, {\n    now: () => now, failureThreshold: 1, cooldownMs: 10, halfOpenMax: 2, successThreshold: 2,\n  });\n  const events = [];\n  assert.equal(b.on('stateChange', (...args) => events.push(args)), b);\n  const first = b.call(); pending.shift().reject(new Error('fail'));\n  await assert.rejects(first);\n  await assert.rejects(b.call(), code('EOPEN'));\n  assert.equal(calls, 1);\n  now = 10;\n  assert.equal(b.state, 'half_open');\n  assert.equal(b.state, 'half_open');\n  const a = b.call(), c = b.call();\n  await assert.rejects(b.call(), code('EOPEN'));\n  pending.shift().resolve('a'); assert.equal(await a, 'a');\n  assert.equal(b.state, 'half_open');\n  pending.shift().resolve('c'); await c;\n  assert.equal(b.state, 'closed');\n  assert.deepEqual(b.failures, []);\n  assert.deepEqual(events, [['closed', 'open'], ['open', 'half_open'], ['half_open', 'closed']]);\n});\n\ntest('old results cannot change a new recovery generation', async () => {\n  let now = 0;\n  const pending = [];\n  const b = new CircuitBreaker(() => { const d = deferred(); pending.push(d); return d.promise; }, {\n    now: () => now, failureThreshold: 1, cooldownMs: 10, halfOpenMax: 2,\n  });\n  const initial = b.call(); pending.shift().reject(Error()); await assert.rejects(initial);\n  now = 10;\n  const a = b.call(), stale = b.call();\n  pending.shift().reject(Error()); await assert.rejects(a);\n  now = 20;\n  assert.equal(b.state, 'half_open');\n  pending.shift().reject(Error()); await assert.rejects(stale);\n  assert.equal(b.state, 'half_open');\n  assert.equal(b.openedAt, 10);\n});\n\ntest('unclassified rejections pass through and count as successful trials', async () => {\n  let now = 0;\n  const ignored = Error('ignored');\n  const b = new CircuitBreaker(err => { throw err; }, {\n    now: () => now, isFailure: err => err \"'!== ignored, failureThreshold: 2, cooldownMs: 1, successThreshold: 1,\n  });\n  await assert.rejects(b.call(Error()));\n  await assert.rejects(b.call(ignored), err => err === ignored);\n  await assert.rejects(b.call(Error()));\n  assert.equal(b.state, '\"'open');\n  now = 1;\n  await assert.rejects(b.call(ignored), err => err === ignored);\n  assert.equal(b.state, 'closed');\n});\n\ntest('timeouts force failure and late settlements are ignored', async () => {\n  const d = deferred();\n  const b = new CircuitBreaker(() => d.promise, { timeoutMs: 10, failureThreshold: 1, isFailure: () => false });\n  await assert.rejects(b.call(), code('ETIMEOUT'));\n  assert.equal(b.state, 'open');\n  const openedAt = b.openedAt;\n  d.reject(Error('late'));\n  await new Promise(resolve => setImmediate(resolve));\n  assert.equal(b.openedAt, openedAt);\n  assert.equal(b.state, 'open');\n});\n\ntest('settlement clears timeout and preserves arguments and values', async () => {\n  const b = new CircuitBreaker((...args) => args, { timeoutMs: 10, failureThreshold: 1 });\n  assert.deepEqual(await b.call(1, 2), [1, 2]);\n  await new Promise(resolve => setTimeout(resolve, 20));\n  assert.equal(b.state, 'closed');\n});\nEOF\nnode --test test/\"", "aggregated_output": "\u2714 test/breaker.test.js (84.630499ms)\n\u2139 tests 1\n\u2139 suites 0\n\u2139 pass 1\n\u2139 fail 0\n\u2139 cancelled 0\n\u2139 skipped 0\n\u2139 todo 0\n\u2139 duration_ms 100.682639\n", "exit_code": 0, "status": "completed"}}
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{"type": "item.completed", "item": {"id": "item_4", "type": "command_execution", "command": "/bin/bash -lc 'node --version && node --test test/breaker.test.js && git diff --stat'", "aggregated_output": "v26.8.1\n\u2714 test/breaker.test.js (86.198141ms)\n\u2139 tests 1\n\u2139 suites 0\n\u2139 pass 1\n\u2139 fail 0\n\u2139 cancelled 0\n\u2139 skipped 0\n\u2139 todo 0\n\u2139 duration_ms 94.180435\nwarning: Not a git repository. Use --no-index to compare two paths outside a working tree\nusage: git diff --no-index [<options>] <path> <path> [<pathspec>...]\n\nDiff output format options\n    -p, --patch           generate patch\n    -s, --no-patch        suppress diff output\n    -u                    generate patch\n    -U, --unified[=<n>]   generate diffs with <n> lines context\n    -W, --[no-]function-context\n                          generate diffs with <n> lines context\n    --raw                 generate the diff in raw format\n    --patch-with-raw      synonym for '-p --raw'\n    --patch-with-stat     synonym for '-p --stat'\n    --numstat             machine friendly --stat\n    --shortstat           output only the last line of --stat\n    -X, --dirstat[=<param1>,<param2>...]\n                          output the distribution of relative amount of changes for each sub-directory\n    --cumulative          synonym for --dirstat=cumulative\n    --dirstat-by-file[=<param1>,<param2>...]\n                          synonym for --dirstat=files,<param1>,<param2>...\n    --check               warn if changes introduce conflict markers or whitespace errors\n    --summary             condensed summary such as creations, renames and mode changes\n    --name-only           show only names of changed files\n    --name-status         show only names and status of changed files\n    --stat[=<width>[,<name-width>[,<count>]]]\n                          generate diffstat\n    --stat-width <width>  generate diffstat with a given width\n    --stat-name-width <width>\n                          generate diffstat with a given name width\n    --stat-graph-width <width>\n                          generate diffstat with a given graph width\n    --stat-count <count>  generate diffstat with limited lines\n    --[no-]compact-summary\n                          generate compact summary in diffstat\n    --binary              output a binary diff that can be applied\n    --[no-]full-index     show full pre- and post-image object names on the \"index\" lines\n    --[no-]color[=<when>] show colored diff\n    --ws-error-highlight <kind>\n                          highlight whitespace errors in the 'context', 'old' or 'new' lines in the diff\n    -z                    do not munge pathnames and use NULs as output field terminators in --raw or --numstat\n    --[no-]abbrev[=<n>]   use <n> digits to display object names\n    --src-prefix <prefix> show the given source prefix instead of \"a/\"\n    --dst-prefix <prefix> show the given destination prefix instead of \"b/\"\n    --line-prefix <prefix>\n                          prepend an additional prefix to every line of output\n    --no-prefix           do not show any source or destination prefix\n    --default-prefix      use default prefixes a/ and b/\n    --inter-hunk-context <n>\n                          show context between diff hunks up to the specified number of lines\n    --output-indicator-new <char>\n                          specify the character to indicate a new line instead of '+'\n    --output-indicator-old <char>\n                          specify the character to indicate an old line instead of '-'\n    --output-indicator-context <char>\n                          specify the character to indicate a context instead of ' '\n\nDiff rename options\n    -B, --break-rewrites[=<n>[/<m>]]\n                          break complete rewrite changes into pairs of delete and create\n    -M, --find-renames[=<n>]\n                          detect renames\n    -D, --irreversible-delete\n                          omit the preimage for deletes\n    -C, --find-copies[=<n>]\n                          detect copies\n    --[no-]find-copies-harder\n                          use unmodified files as source to find copies\n    --no-renames          disable rename detection\n    --[no-]rename-empty   use empty blobs as rename source\n    --[no-]follow         continue listing the history of a file beyond renames\n    -l <n>                prevent rename/copy detection if the number of rename/copy targets exceeds given limit\n\nDiff algorithm options\n    --minimal             produce the smallest possible diff\n    -w, --ignore-all-space\n                          ignore whitespace when comparing lines\n    -b, --ignore-space-change\n                          ignore changes in amount of whitespace\n    --ignore-space-at-eol ignore changes in whitespace at EOL\n    --ignore-cr-at-eol    ignore carrier-return at the end of line\n    --ignore-blank-lines  ignore changes whose lines are all blank\n    -I, --[no-]ignore-matching-lines <regex>\n                          ignore changes whose all lines match <regex>\n    --[no-]indent-heuristic\n                          heuristic to shift diff hunk boundaries for easy reading\n    --patience            generate diff using the \"patience diff\" algorithm\n    --histogram           generate diff using the \"histogram diff\" algorithm\n    --diff-algorithm <algorithm>\n                          choose a diff algorithm\n    --anchored <text>     generate diff using the \"anchored diff\" algorithm\n    --word-diff[=<mode>]  show word diff, using <mode> to delimit changed words\n    --word-diff-regex <regex>\n                          use <regex> to decide what a word is\n    --color-words[=<regex>]\n                          equivalent to --word-diff=color --word-diff-regex=<regex>\n    --[no-]color-moved[=<mode>]\n                          moved lines of code are colored differently\n    --[no-]color-moved-ws <mode>\n                          how white spaces are ignored in --color-moved\n\nOther diff options\n    --[no-]relative[=<prefix>]\n                          when run from subdir, exclude changes outside and show relative paths\n    -a, --[no-]text       treat all files as text\n    -R                    swap two inputs, reverse the diff\n    --[no-]exit-code      exit with 1 if there were differences, 0 otherwise\n    --[no-]quiet          disable all output of the program\n    --[no-]ext-diff       allow an external diff helper to be executed\n    --[no-]textconv       run external text conversion filters when comparing binary files\n    --ignore-submodules[=<when>]\n                          ignore changes to submodules in the diff generation\n    --submodule[=<format>]\n                          specify how differences in submodules are shown\n    --ita-invisible-in-index\n                          hide 'git add -N' entries from the index\n    --ita-visible-in-index\n                          treat 'git add -N' entries as real in the index\n    -S <string>           look for differences that change the number of occurrences of the specified string\n    -G <regex>            look for differences that change the number of occurrences of the specified regex\n    --pickaxe-all         show all changes in the changeset with -S or -G\n    --pickaxe-regex       treat <string> in -S as extended POSIX regular expression\n    -O <file>             control the order in which files appear in the output\n    --rotate-to <path>    show the change in the specified path first\n    --skip-to <path>      skip the output to the specified path\n    --find-object <object-id>\n                          look for differences that change the number of occurrences of the specified object\n    --diff-filter [(A|C|D|M|R|T|U|X|B)...[*]]\n                          select files by diff type\n    --output <file>       output to a specific file\n\n", "exit_code": 129, "status": "failed"}}
{"type": "item.completed", "item": {"id": "item_5", "type": "agent_message", "text": "Fixed `breaker.js` while preserving constructor options and the CommonJS export.\n\nAdded tests covering rolling failures, cooldown transitions, trial limits, stale results, failure classification, and timeouts.\n\n`node --test test/` passes. Verification used installed Node v26.8.1; code remains Node 20 compatible."}}
{"type": "turn.completed", "usage": {"input_tokens": 87228, "cached_input_tokens": 74240, "cache_write_input_tokens": 0, "output_tokens": 2509, "reasoning_output_tokens": 91}}