fix(cli): let at-completion recover from a failed crawl or search (Fixes #3373) - #3394
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Included review availability: Your plan provides up to 4 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe completion hook centralizes debounced pattern work, retries changed patterns after errors, and clears timer state consistently. Tests now verify loading before crawl and search failures settle into error states. ChangesAt-completion recovery
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The change is localized and keeps retries bounded, but the crawl-failure tests may not deterministically exercise recovery from the ERROR state if the pattern changes too early; merge is reasonable with explicit owner follow-up to make that assertion reliable. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Linked Issues checkExplanation The implementation satisfies issue [ Full details: Description checkExplanation The description includes the required TLDR, detailed rationale, reviewer test plan, testing matrix, and linked issue. It provides clear behavior, scope, test coverage, and validation results. The matrix contains some untested platform entries, but the description is otherwise complete. ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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WalkthroughBefore this change, a single transient failure during Release NotesBug Fixes
Refactor
Tests
Changes
Sequence DiagramsequenceDiagram
User->>usePatternChangeHandler: types @pattern
usePatternChangeHandler->>atCompletionReducer: dispatch INITIALIZE
atCompletionReducer->>useInitializationHandler: status = INITIALIZING
useInitializationHandler->>FileSearchFactory: createFileSearcher(config, cwd)
FileSearchFactory->>FileSearch: create and initialize
FileSearch-->>useInitializationHandler: throws
useInitializationHandler->>atCompletionReducer: dispatch ERROR
atCompletionReducer->>usePatternChangeHandler: status = ERROR
User->>usePatternChangeHandler: types another character
usePatternChangeHandler->>atCompletionReducer: dispatch RESET
atCompletionReducer->>usePatternChangeHandler: state = IDLE
usePatternChangeHandler->>atCompletionReducer: dispatch INITIALIZE
atCompletionReducer->>useInitializationHandler: status = INITIALIZING
useInitializationHandler->>FileSearchFactory: createFileSearcher(config, cwd)
FileSearchFactory->>FileSearch: create and initialize
FileSearch-->>useInitializationHandler: success
useInitializationHandler->>atCompletionReducer: dispatch INITIALIZE_SUCCESS
atCompletionReducer->>usePatternChangeHandler: status = READY
usePatternChangeHandler->>atCompletionReducer: dispatch SEARCH
atCompletionReducer->>useSearchHandler: status = SEARCHING
useSearchHandler->>performSearch: fileSearch.search(pattern)
performSearch->>FileSearch: search(pattern, signal)
FileSearch-->>performSearch: results
performSearch->>atCompletionReducer: dispatch SEARCH_SUCCESS
Magnitude🎯 1 (S) Related
Pre-merge Checks
Walkthrough generated by LLxprt PR Review. Planner issue: #2256 |
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Inline comments:
In `@packages/cli/src/ui/hooks/useAtCompletion.test.ts`:
- Around line 399-423: Update the affected useAtCompletion tests to use a
deferred initialize rejection and resolve it inside await act(...) before
rerendering with the new pattern. Await the resulting ERROR state explicitly so
each test changes patterns from ERROR rather than INITIALIZING, including the
analogous cases at the other referenced test blocks.
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packages/cli/src/ui/hooks/useAtCompletion.test.tspackages/cli/src/ui/hooks/useAtCompletion.ts
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@coderabbitai on the "wait for the crawl failure before changing the pattern" finding: the premise does not hold in this hook, but the tests now pin that fact rather than relying on it implicitly. The predicate cannot match the values the hook starts with. There is also no intermediate state that satisfies the predicate. While the status is Independent evidence from the retry-bound tests: Changed in 459093b: each of the four affected tests now asserts Declining the deferred-rejection rewrite: it would add a manual promise and an |
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Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain🏁 Script executed: #!/bin/bash
set -euo pipefail
ast-grep outline packages/cli/src/ui/hooks/useAtCompletion.ts --items all --view expanded
ast-grep outline packages/cli/src/ui/hooks/useAtCompletion.test.ts --items all --view expanded
printf '\n--- reducer and loading synchronization ---\n'
rg -n -C 12 'INITIALIZE|INITIALIZE_SUCCESS|SET_LOADING|ERROR|RESET|useSyncLoadingState|isLoading' \
packages/cli/src/ui/hooks/useAtCompletion.ts
printf '\n--- recovery and retry-bound tests ---\n'
rg -n -C 20 'crawl failure|retries at most once per distinct normalized pattern|does not loop when a retry fails again|isLoadingSuggestions.*toBe\(true\)|waitFor' \
packages/cli/src/ui/hooks/useAtCompletion.test.ts
printf '\n--- commit availability and changed test lines ---\n'
git show --no-ext-diff --format=fuller --stat 459093b --
git show --no-ext-diff --format= --unified=12 459093b -- packages/cli/src/ui/hooks/useAtCompletion.test.tsLength of output: 53155
The retry-count assertions provide independent confirmation that the retry tests enter I withdraw the finding. The deferred-rejection rewrite is not needed. 🐇🔍 ✏️ Learnings added
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#3373) useAtCompletion had no transition out of AtCompletionStatus.ERROR on a pattern change, so a single failed file-system crawl or search left `@` completion silently empty for the rest of the session in that directory. Typing more characters looked like it should retry and did not; the only escape was deleting the `@` or changing cwd. A pattern change from ERROR now re-enters initialization. The retry is bounded by the normalized pattern that work was last started for, so a genuinely broken directory retries once per distinct pattern rather than on every render, and a retry that fails again does not loop. The debounce-and-dispatch body shared by the search path and the new retry path is extracted into startPatternWork, and the three copies of the timer teardown into clearDebounceTimer, which keeps the effect within the lint limits for function length and cognitive complexity.
Review follow-ups on the #3373 retry path. The retry now dispatches RESET rather than INITIALIZE. INITIALIZE leaves state.pattern alone, so on the search-failure path useInitializationHandler would replay a search for the pattern that had just failed as soon as the retry crawl succeeded. RESET clears it and hands control to the IDLE branch, the state machine's existing entry point. The attempted pattern is now recorded when the retry dispatches instead of when it is scheduled. A debounced retry can still be cancelled by the effect cleanup, which a case-only edit arriving inside the debounce window does; recording early marked that cancelled retry as made and left completion stuck in ERROR. Adds coverage for both: the search-count assertion in the search-failure test pins the absent replay, and two new tests cover a case-only edit cancelling the pending retry and a retry whose own search fails again.
The at-completion recovery tests wait for the loading flag to clear as their signal that the crawl has failed. They now assert the flag is set first, which rules out the wait passing on the value the hook holds before initialization is dispatched.
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TLDR
useAtCompletionhad no transition out ofAtCompletionStatus.ERRORon a pattern change. One failed file-system crawl or search left@completion silently empty for the rest of the session in that working directory: typing more characters looked like it should retry and dispatched nothing. The only escapes were deleting the@, disabling the hook, or changingcwd.A pattern change from
ERRORnow dispatchesRESET, which returns the machine toIDLE, whose existing branch re-enters initialization and then search. The retry is bounded to one attempt per distinct normalized pattern, so a genuinely broken directory does not re-crawl on every render and a retry that fails again does not loop.Reviewers should look at two decisions in
usePatternChangeHandler: why the retry dispatchesRESETinstead ofINITIALIZE, and why the attempted pattern is recorded when the action dispatches rather than when it is scheduled. Each has a test that fails without it.Dive Deeper
ERRORis reachable two ways, and they leave the state differently:useInitializationHandlercatches a rejectedcreateFileSearcher.state.patternis stillnullhere, because only theSEARCHaction writes it.performSearchcatches a rejectedFileSearch.search.state.patternholds the pattern that failed.Both now recover.
Why
RESETand notINITIALIZE.INITIALIZEleavesstate.patternalone. On the search-failure path that value is the pattern that just failed, so as soon as the retry crawl succeededuseInitializationHandlerwould dispatch aSEARCHfor it: a wasted search of a pattern the user has already typed past. Its result is discarded by theshouldDispatchResultguard, so nothing wrong reaches the screen, but the work is pointless.RESETclears the pattern and hands control to theIDLEbranch, which is the state machine's existing entry point. The search-failure test assertsFileSearch.searchwas called exactly twice; dispatchingINITIALIZEthere makes it three.Why the retry bound is a ref and not
state.pattern. On the initialization-failure pathstate.patternisnull, so anormalizedPattern !== state.patternguard would be true forever and the hook would re-crawl on every render, spinning without end on a directory that is genuinely broken.attemptedPatternRefrecords the normalized pattern that work was last started for, and theERRORbranch fires only when the current pattern differs from it.Why the bound is written at dispatch time. The retry is debounced by the existing
SEARCH_DEBOUNCE_MS(150 ms), and a debounced action can still be cancelled by the effect cleanup. A case-only edit arriving inside that window (alphthenALPH) cancels the pending retry and normalizes to the same value, so a bound written at schedule time would record a retry that never happened and leave completion stuck inERROR. Writing it inside the dispatch closure fixes that.Refactor. The debounce-and-dispatch body is now shared by the search path and the retry path, so it was extracted into
startPatternWork, and the three copies of the timer teardown intoclearDebounceTimer. This is a behavior-preserving extraction of code that already existed; it was required because adding theERRORbranch pushedusePatternChangeHandlerpast the repository'smax-lines-per-function(80) andsonarjs/cognitive-complexity(30) limits.Out of scope and deliberately not done: surfacing the error in the UI (there is no error affordance today), time-based retry, backoff, and retry counters.
Acceptance criteria and the reasoning behind each are recorded in
project-plans/issue3373-at-completion-error-recovery.md.Reviewer Test Plan
Six behavioral tests were added to
packages/cli/src/ui/hooks/useAtCompletion.test.ts, all driving the real hook against a real temp directory withFileSearchFactory.createstubbed only to inject the failure:initialize,cwdunchanged.search, plus the assertion that the failed pattern is not replayed.FileSearchFactory.createcalled once acrossalp,alp,ALP, with the clock driven past the debounce).ERRORwithout spinning (createcalled exactly twice).To confirm they bite, each was run against the unfixed code:
main, tests 1, 2, 5, and 6 fail.RESETdecision toINITIALIZEfails test 2.normalizedPattern !== state.patternfails test 4.Manual check: point the CLI at a directory whose crawl can be made to fail, type
@, then keep typing. Before this change the list stays empty forever; after it, the next character retries and suggestions appear.Full local cycle on the candidate head:
npm run test,npm run lint,npm run typecheck,npm run format,npm run build, and thestepfun-37startup smoke all pass.Testing Matrix
Linked issues / bugs
Fixes #3373
Related to #2019, whose
ERROR-path coverage was limited tocwd-change recovery precisely because same-directory recovery did not work.Summary by CodeRabbit