# Challenges **URL:** https://forum.codecrafters.io/c/challenges/6.md [Latest](https://forum.codecrafters.io/latest.md) · [Categories](https://forum.codecrafters.io/categories.md) · [Tags](https://forum.codecrafters.io/tags.md) --- ## [About the Challenges category](https://forum.codecrafters.io/t/about-the-challenges-category/18)
**Author:** [@rohitpaulk](https://forum.codecrafters.io/u/rohitpaulk)\ **Replies:** 1\ **Last updated:** [August 8, 2024, 12:48pm UTC](https://forum.codecrafters.io/t/about-the-challenges-category/18 "2024-08-08T12:48:39Z")
Place any discussions that are specific to a challenge here. Examples: Debugging help, bug reports for the tester, questions related to stage instructions. --- ## [Continuous read tool calls](https://forum.codecrafters.io/t/continuous-read-tool-calls/16281)
**Author:** [@aargeee](https://forum.codecrafters.io/u/aargeee)\ **Replies:** 0\ **Last updated:** [September 14, 2026, 9:37pm UTC](https://forum.codecrafters.io/t/continuous-read-tool-calls/16281 "2026-09-14T21:37:47Z")
I’m stuck on Stage #FF2 My Prompt: explain what code is written in ./apple.py apple.py has simple hello world code in python The first user prompt is sent to the LLM, it responds back with a ReadFile tool call. I retu… --- ## [Test always times out, even when I just print hi](https://forum.codecrafters.io/t/test-always-times-out-even-when-i-just-print-hi/16278)
**Author:** [@adarsh-kishore786](https://forum.codecrafters.io/u/adarsh-kishore786)\ **Replies:** 1\ **Last updated:** [September 14, 2026, 3:29pm UTC](https://forum.codecrafters.io/t/test-always-times-out-even-when-i-just-print-hi/16278 "2026-09-14T15:29:37Z")
I’m stuck on Stage #ND9 of building Sqlite using Clojure. My tests are always timing out, no errors, it just times out. Locally everything is running, even your\_program.sh. $ clj -M -m sqlite.core backup.db "select co… --- ## [\[C, shell, IP1\] Empty line appears out of nowhere](https://forum.codecrafters.io/t/c-shell-ip1-empty-line-appears-out-of-nowhere/16264)
**Author:** [@zergitscher](https://forum.codecrafters.io/u/zergitscher)\ **Replies:** 1\ **Last updated:** [September 8, 2026, 1:07pm UTC](https://forum.codecrafters.io/t/c-shell-ip1-empty-line-appears-out-of-nowhere/16264 "2026-09-08T13:07:13Z")
Hello. I’d like help with the stage in the title. I get an empty line that fails the test. I’m pretty sure I don’t print it and to confirm I copied someone else’s function, namely jolly-donkey-889683/src at main · cc-cod… --- ## [I can't sumbit my test](https://forum.codecrafters.io/t/i-cant-sumbit-my-test/16249)
**Author:** [@Ahad888](https://forum.codecrafters.io/u/Ahad888)\ **Replies:** 3\ **Last updated:** [August 29, 2026, 7:57am UTC](https://forum.codecrafters.io/t/i-cant-sumbit-my-test/16249 "2026-08-29T07:57:18Z")
--- ## [Return type of #EF1 (Lists - Remove an element)](https://forum.codecrafters.io/t/return-type-of-ef1-lists-remove-an-element/16240)
**Author:** [@vilasp](https://forum.codecrafters.io/u/vilasp)\ **Replies:** 1\ **Last updated:** [August 19, 2026, 8:00pm UTC](https://forum.codecrafters.io/t/return-type-of-ef1-lists-remove-an-element/16240 "2026-08-19T20:00:03Z")
I’m running the test suite for #EF1 (Lists - Remove an element) but it seems like the return type is never accepted. If I pass an array according to docs it says expected Bulk string, and it I pass a Bulk string it says … --- ## [Duplicate keys in JSON response](https://forum.codecrafters.io/t/duplicate-keys-in-json-response/16221)
**Author:** [@aniruddhaniranjan](https://forum.codecrafters.io/u/aniruddhaniranjan)\ **Replies:** 3\ **Last updated:** [August 10, 2026, 12:02am UTC](https://forum.codecrafters.io/t/duplicate-keys-in-json-response/16221 "2026-08-10T00:02:35Z")
Hi, while implementing/testing the write tool, sometimes I’m getting a response from the OpenAI client with duplicate keys in the JSON. Please see below where function arguments have two keys “parameter” \[your\_program\] … --- ## [\#JV1 ls: \>: No such file or directory](https://forum.codecrafters.io/t/jv1-ls-no-such-file-or-directory/16217)
**Author:** [@VOIDPACKET-VP](https://forum.codecrafters.io/u/VOIDPACKET-VP)\ **Replies:** 5\ **Last updated:** [July 29, 2026, 3:38pm UTC](https://forum.codecrafters.io/t/jv1-ls-no-such-file-or-directory/16217 "2026-07-29T15:38:44Z")
I’m stuck on Stage #JV1 I’ve tried to separate the full command into 2 parts : the text (toRedirect) and the file (redirectionLocation) then used ofstream to handle the \> operator logic Here are my logs: \[tester::#JV1… --- ## [\#UN3 weird cat command error](https://forum.codecrafters.io/t/un3-weird-cat-command-error/16220)
**Author:** [@iAyman-coder](https://forum.codecrafters.io/u/iAyman-coder)\ **Replies:** 2\ **Last updated:** [July 29, 2026, 8:32am UTC](https://forum.codecrafters.io/t/un3-weird-cat-command-error/16220 "2026-07-29T08:32:51Z")
I’m stuck on Stage #QP2. I’ve tried to pass the “Builtin completion (#QP2)” stage from the “Build your own shell” tutorial. It passes the tests for this specific stage, but it shows that my implementation of the previou… --- ## [\#QP2 Tests receiving empty output/whitespace](https://forum.codecrafters.io/t/qp2-tests-receiving-empty-output-whitespace/16215)
**Author:** [@babanini95](https://forum.codecrafters.io/u/babanini95)\ **Replies:** 4\ **Last updated:** [July 27, 2026, 7:54am UTC](https://forum.codecrafters.io/t/qp2-tests-receiving-empty-output-whitespace/16215 "2026-07-27T07:54:55Z")
I’m stuck on Stage #QP2. I’ve found some issue that similar to this issue. I’m using linenoise to help me add command autocomplete feature. But somehow the test receiving whitespace when testing previous stage and I can… --- ## [README\_old.md disappeared after first execution of ls command when implementing the bash tool #oq5](https://forum.codecrafters.io/t/readme-old-md-disappeared-after-first-execution-of-ls-command-when-implementing-the-bash-tool-oq5/16208)
**Author:** [@OnTheEasiestWay](https://forum.codecrafters.io/u/OnTheEasiestWay)\ **Replies:** 2\ **Last updated:** [July 19, 2026, 11:44pm UTC](https://forum.codecrafters.io/t/readme-old-md-disappeared-after-first-execution-of-ls-command-when-implementing-the-bash-tool-oq5/16208 "2026-07-19T23:44:05Z")
I’m stuck on Stage #OQ5 for the claude-code challenge. I’ve tried to use env::current\_dir() to get the working directory. And I found the files when using ls command, but when I tried to delete the README\_old.md, the f… --- ## [I am getting Internal Server Error on Claude Code Challenge](https://forum.codecrafters.io/t/i-am-getting-internal-server-error-on-claude-code-challenge/16201)
**Author:** [@ArrivedAditya](https://forum.codecrafters.io/u/ArrivedAditya)\ **Replies:** 4\ **Last updated:** [July 12, 2026, 3:36pm UTC](https://forum.codecrafters.io/t/i-am-getting-internal-server-error-on-claude-code-challenge/16201 "2026-07-12T15:36:42Z")
Logs: ❯ codecrafters submit Submitting changes (commit: bf5c5ed)... ⚡ This is a turbo test run. https://codecrafters.io/turbo Running tests on your code. Logs should appear shortly... \[compile\] Moved ./.codecrafters/… --- ## [\#TZ2 Failing because of clash with #LC6? Need help!](https://forum.codecrafters.io/t/tz2-failing-because-of-clash-with-lc6-need-help/16199)
**Author:** [@Walheimat](https://forum.codecrafters.io/u/Walheimat)\ **Replies:** 1\ **Last updated:** [July 7, 2026, 6:41pm UTC](https://forum.codecrafters.io/t/tz2-failing-because-of-clash-with-lc6-need-help/16199 "2026-07-07T18:41:05Z")
I’m stuck on Stage #TZ2 I can’t reproduce the problem locally but it looks like there’s a clash between this task and what #LC6 (directory completion) expects? There you have to complete the first directory if there’s n… --- ## [\#lc6 Failing, not able to replicate the error locally](https://forum.codecrafters.io/t/lc6-failing-not-able-to-replicate-the-error-locally/16192)
**Author:** [@Gautam1608](https://forum.codecrafters.io/u/Gautam1608)\ **Replies:** 2\ **Last updated:** [July 2, 2026, 4:38am UTC](https://forum.codecrafters.io/t/lc6-failing-not-able-to-replicate-the-error-locally/16192 "2026-07-02T04:38:28Z")
I’m stuck on Stage #lc6 Latest Code: Gautam-Shell/app/main.py at main · Gautam1608/Gautam-Shell · GitHub Code Submit output: \[tester::#LC6\] Running tests for Stage #LC6 (Filename Completion - Directory completion) \[te… --- ## [\#GP4 failing, unsure why](https://forum.codecrafters.io/t/gp4-failing-unsure-why/16194)
**Author:** [@kylexd](https://forum.codecrafters.io/u/kylexd)\ **Replies:** 2\ **Last updated:** [July 2, 2026, 3:54am UTC](https://forum.codecrafters.io/t/gp4-failing-unsure-why/16194 "2026-07-02T03:54:05Z")
I’m stuck on Stage #GP4 I’ve tried capturing OS-specific home env vars in addition to user.home (which I expect should be all that is needed) and the home directory seems correct but the tests are failing. I think eith… --- ## [Working locally but failing submit #ue6](https://forum.codecrafters.io/t/working-locally-but-failing-submit-ue6/16188)
**Author:** [@Gautam1608](https://forum.codecrafters.io/u/Gautam1608)\ **Replies:** 3\ **Last updated:** [June 30, 2026, 6:50pm UTC](https://forum.codecrafters.io/t/working-locally-but-failing-submit-ue6/16188 "2026-06-30T18:50:57Z")
I’m stuck on Stage #ue6. Here are my logs: \[tester::#ZV2\] ✓ Prompt line matches "$ wc grape-" \[tester::#ZV2\] Pressed "\" (expecting autocomplete to "wc grape-90.txt" followed by a space) \[your-program\] $ wc grape-g… --- ## [Help needed for #PM5](https://forum.codecrafters.io/t/help-needed-for-pm5/16187)
**Author:** [@HadiSaleemi666](https://forum.codecrafters.io/u/HadiSaleemi666)\ **Replies:** 5\ **Last updated:** [June 29, 2026, 8:16pm UTC](https://forum.codecrafters.io/t/help-needed-for-pm5/16187 "2026-06-29T20:16:24Z")
So I figured out a lot of problems on this stage and attempted a lot of fixes. This specific error, though, I am not quite sure how to fix or what to do about it. import sys, os, subprocess, shlex, readline redirect… --- ## [\#QP2 submission failing because of a #UN3 failure](https://forum.codecrafters.io/t/qp2-submission-failing-because-of-a-un3-failure/16186)
**Author:** [@aniketpt](https://forum.codecrafters.io/u/aniketpt)\ **Replies:** 5\ **Last updated:** [June 28, 2026, 5:42pm UTC](https://forum.codecrafters.io/t/qp2-submission-failing-because-of-a-un3-failure/16186 "2026-06-28T17:42:29Z")
When I submitted my solution for stage #QP2, it passed the tests for the target stage, but failed for stage #UN3 (a stage from previous section). My code already passed that stage, so I am trying to understand why its fa… --- ## [Help needed for #YT5](https://forum.codecrafters.io/t/help-needed-for-yt5/16182)
**Author:** [@HadiSaleemi666](https://forum.codecrafters.io/u/HadiSaleemi666)\ **Replies:** 3\ **Last updated:** [June 26, 2026, 5:26pm UTC](https://forum.codecrafters.io/t/help-needed-for-yt5/16182 "2026-06-26T17:26:03Z")
I’m stuck on Stage #YT5 and it feels like its because of bad programming practices. ive been sitting here for I think around 8 hours straight, probably more tryna figure out what to do. I’ve tried two distinct approache… --- ## [Test not registering prompt on build your own shell in golang](https://forum.codecrafters.io/t/test-not-registering-prompt-on-build-your-own-shell-in-golang/16181)
**Author:** [@hamza-m-masood](https://forum.codecrafters.io/u/hamza-m-masood)\ **Replies:** 4\ **Last updated:** [June 24, 2026, 4:55pm UTC](https://forum.codecrafters.io/t/test-not-registering-prompt-on-build-your-own-shell-in-golang/16181 "2026-06-24T16:55:24Z")
I’m stuck on Stage #QP2 As you can see by running the same code, the prompt correctly appears. But for some reason the test fails to recognize the prompt. Are the tests open source? Can I view the code on how the test … --- ## [Question regarding #MG5](https://forum.codecrafters.io/t/question-regarding-mg5/16176)
**Author:** [@HadiSaleemi666](https://forum.codecrafters.io/u/HadiSaleemi666)\ **Replies:** 2\ **Last updated:** [June 24, 2026, 4:37am UTC](https://forum.codecrafters.io/t/question-regarding-mg5/16176 "2026-06-24T04:37:36Z")
Hello, hope everyone’s doing well. I have a question regarding #MG5. I’m currently working on a windows device and I realized after testing that the code requires the answer to be in a posix format? because when I attemp… --- ## [Potentially incorrect tests](https://forum.codecrafters.io/t/potentially-incorrect-tests/16175)
**Author:** [@hamza-m-masood](https://forum.codecrafters.io/u/hamza-m-masood)\ **Replies:** 2\ **Last updated:** [June 22, 2026, 3:41pm UTC](https://forum.codecrafters.io/t/potentially-incorrect-tests/16175 "2026-06-22T15:41:29Z")
I’m stuck on Stage #JV1 I’ve tried to correct my program but I’m pretty sure my cat command is working as expected. I can cat a file correctly, and I can also cat a file to redirect to another file. I can then cat the f… --- ## [I'm Stuck on #MG5 of the Shell Building project](https://forum.codecrafters.io/t/im-stuck-on-mg5-of-the-shell-building-project/16174)
**Author:** [@Jishnu-Ray](https://forum.codecrafters.io/u/Jishnu-Ray)\ **Replies:** 2\ **Last updated:** [June 21, 2026, 6:06pm UTC](https://forum.codecrafters.io/t/im-stuck-on-mg5-of-the-shell-building-project/16174 "2026-06-21T18:06:27Z")
I’m stuck on Stage #MG5. I have done everything write I think but the test script tests for cat tool in “/usr/bin/” directory which is not possible since I’m on Windows. Is it not possible to pass this in Windows? Ple… --- ## [C++ Build a shell runs locally but fails when using codecrafters submit](https://forum.codecrafters.io/t/c-build-a-shell-runs-locally-but-fails-when-using-codecrafters-submit/16171)
**Author:** [@Edt12](https://forum.codecrafters.io/u/Edt12)\ **Replies:** 2\ **Last updated:** [June 19, 2026, 10:23am UTC](https://forum.codecrafters.io/t/c-build-a-shell-runs-locally-but-fails-when-using-codecrafters-submit/16171 "2026-06-19T10:23:16Z")
Hi I am on stage 8 type command of the c++ shell challenge I have a working solution on my machine however when i do codecrafters submit i get the following error. \[compile\] Compilation successful. Debug = true \[tester… --- ## [My program failed and the tester's error message is not clear. Quite confusing considering information available in the instruction](https://forum.codecrafters.io/t/my-program-failed-and-the-testers-error-message-is-not-clear-quite-confusing-considering-information-available-in-the-instruction/16164)
**Author:** [@skuong](https://forum.codecrafters.io/u/skuong)\ **Replies:** 2\ **Last updated:** [June 12, 2026, 6:26am UTC](https://forum.codecrafters.io/t/my-program-failed-and-the-testers-error-message-is-not-clear-quite-confusing-considering-information-available-in-the-instruction/16164 "2026-06-12T06:26:08Z")
I’m stuck on Stage #EP2. I’ve tried testing locally with this registered specification script: #!/usr/bin/env python3 print("add") print("commit") print("branch") print("cat-file") print("remote") print("rebase") pri… --- ## [Can't proceed with Tests due to tester using wrong path?](https://forum.codecrafters.io/t/cant-proceed-with-tests-due-to-tester-using-wrong-path/16160)
**Author:** [@Bekobii](https://forum.codecrafters.io/u/Bekobii)\ **Replies:** 4\ **Last updated:** [June 5, 2026, 9:56pm UTC](https://forum.codecrafters.io/t/cant-proceed-with-tests-due-to-tester-using-wrong-path/16160 "2026-06-05T21:56:27Z")
I’m stuck on Stage #IP1 It always gives me following error: \[tester::#IP1\] Expected: “Arg #0 (program name): custom\_exe\_1165” \[tester::#IP1\] Received: “Arg #0 (program name): /tmp/dog/custom\_exe\_1165” This seems to n… --- ## [I believe that i am hitting rate limits](https://forum.codecrafters.io/t/i-believe-that-i-am-hitting-rate-limits/16158)
**Author:** [@arjav0703](https://forum.codecrafters.io/u/arjav0703)\ **Replies:** 3\ **Last updated:** [June 4, 2026, 5:52pm UTC](https://forum.codecrafters.io/t/i-believe-that-i-am-hitting-rate-limits/16158 "2026-06-04T17:52:49Z")
I’m stuck on Stage #FF2 I’ve tried getting my own openrouter api keys and testing with it (it works fine that way) Here are my logs: \[your\_program\] entering loop with messages: \[ \[your\_program\] { \[your\_program\] … --- ## [Hitting PermissionError: \[Errno 1\] Operation not permitted](https://forum.codecrafters.io/t/hitting-permissionerror-errno-1-operation-not-permitted/16153)
**Author:** [@hseelawi](https://forum.codecrafters.io/u/hseelawi)\ **Replies:** 2\ **Last updated:** [June 4, 2026, 12:05pm UTC](https://forum.codecrafters.io/t/hitting-permissionerror-errno-1-operation-not-permitted/16153 "2026-06-04T12:05:26Z")
I think the turbo runner is not running the docker container with –cap-add=SYS\_ADMINbecause I am Hitting PermissionError: \[Errno 1\] Operation not permitted. When I comment out my solution, I get a pid value that is not 1.… --- ## [Challenge: shell : pwd command working fine on my local compiled but failing due to command not found due to path for the pwd binary might not be found](https://forum.codecrafters.io/t/challenge-shell-pwd-command-working-fine-on-my-local-compiled-but-failing-due-to-command-not-found-due-to-path-for-the-pwd-binary-might-not-be-found/16143)
**Author:** [@quantumbit1](https://forum.codecrafters.io/u/quantumbit1)\ **Replies:** 2\ **Last updated:** [June 1, 2026, 12:46pm UTC](https://forum.codecrafters.io/t/challenge-shell-pwd-command-working-fine-on-my-local-compiled-but-failing-due-to-command-not-found-due-to-path-for-the-pwd-binary-might-not-be-found/16143 "2026-06-01T12:46:59Z")
tried pwd command on my local WSL environment and it is working correctly but when submitted to codecrafters it says that the command is not found. Suspecting if the path is available or not on the station wherever it ch… --- ## [\#BF7 Bittorrent challenge: torrent not found](https://forum.codecrafters.io/t/bf7-bittorrent-challenge-torrent-not-found/15692)
**Author:** [@natalka1122](https://forum.codecrafters.io/u/natalka1122)\ **Replies:** 2\ **Last updated:** [May 31, 2026, 6:11pm UTC](https://forum.codecrafters.io/t/bf7-bittorrent-challenge-torrent-not-found/15692 "2026-05-31T18:11:29Z")
It looks like test torrent is gone from the anouncer. For my request it answers Dict({'failure reason': String(b'torrent not found')}) It started a few hours ago. I passed this stage days ago, but now codecrafters tes… [Next page](https://forum.codecrafters.io/c/challenges/6.md?page=1)