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Show HN: Quibbler – A critic for your coding agent that learns what you want

114 points - last Friday at 12:43 AM

Source
  • p0w3n3d

    last Friday at 7:32 AM

    In other words, the Quibbler siphons wrackspurts away from your code.

    • mouse_

      last Friday at 12:03 PM

      There's so many agents to handle my agents, I'm gonna need agents for my agent agents soon.

    • benzible

      today at 6:23 AM

      Cool concept, but I picture Quibbler as an off-brand Batman villain.

      • janpio

        last Friday at 9:47 AM

        The demo video in the GH page didn't work for me, but there is also one on Twitter/X: https://xcancel.com/fulcrumML/status/1984054489851310191

        • gexla

          last Friday at 3:50 AM

          More explanation here that I found by Googling around. Though not sure it has more info than the Github page.

          https://fulcrumresearch.ai/2025/10/22/introducing-orchestra-...

          • nberkman

            last Friday at 2:04 PM

            Submitted a PR with AWS Bedrock support: https://github.com/fulcrumresearch/quibbler/pull/5/files (credits!)

            • stacktraceyo

              last Saturday at 8:12 AM

              Can the same concept be used for non coding tasks?

              • balleddog

                last Friday at 8:54 AM

                Is an anthropic api key really necessary? A major roadblock for taking a test drive. Already have a Claud Max subscription but an anthropic api key still need at least 5$/mon extra.

                  • epiccoleman

                    last Friday at 2:27 PM

                    I really want Anthropic to let me make an API token that pulls from the same pool of usage that my Pro subscription does with the official clients. It would be cool to be able to run experiments with alternate clients and automation and stuff without having to go swipe the card at the ol' API token refilling station.

                    • asn0

                      last Friday at 11:23 AM

                      You could use the prompts in the code to create a Claude Code sub-agent[1], which would do the same thing without an API key

                      1. https://docs.claude.com/en/docs/claude-code/sub-agents

                        • threecheese

                          last Saturday at 7:42 PM

                          How would you invoke the subagent? Can a HookResponse cause a subagent to be invoked, to perform analysis on the action taken and then inject that back into the main loop?

                          Or would the hook invoke another instance of claude code?

                          I just read through the hook docs and I’m a bit fuzzy on the bidirectionality of it.

                      • thenthenthen

                        last Friday at 9:36 AM

                        Sounds like video streaming services…

                    • selfawareMammal

                      last Friday at 7:51 AM

                      An agent's agent?

                        • hikarudo

                          last Friday at 9:15 AM

                          A gentleman's gentleman!

                          • oneandonley1

                            last Friday at 2:15 PM

                            Sounds like a wip to me, "do it better or get punished"

                        • agarttha

                          last Friday at 5:46 PM

                          Replace the middle manager

                          • etherio

                            last Friday at 4:26 AM

                            hey HN! happy to answer any questions

                            this kind of tool is especially useful in longer running tasks to enforce your intent without having to check in on your agent all the time

                              • anonymous908213

                                last Friday at 4:52 AM

                                Can users stack Quibblers, so Quibbler 2 corrects Quibbler 1 if, say, it fabricates an issue in the code it's reviewing? If so, have you found an optimum number of Quibblers for the Quibbler stack? Also, might users form a Quibbler council such that multiple Quibblers review the same thing and form a consensus before proceeding?

                                  • Balinares

                                    last Friday at 7:54 AM

                                    I love the pixel-perfect precision with which this comment is straddling the Poe's Law line.

                                    That aside I also love the concept of Quibbler Council and I'd get a kick out of seeing it in action.

                                      • sheepscreek

                                        last Friday at 12:29 PM

                                        MoQs - Mixture of Quibblers? Would be convenient to have them run on dedicated FGPAs. Then they can facilitate near real-time quibbing at the network level across all packets.

                            • anonymous908213

                              last Friday at 4:46 AM

                              But who polices the vibe police?

                                • Brajeshwar

                                  last Friday at 5:48 AM

                                  “Well, who’s gonna monitor the monitors of the monitors?” — Enemy of the State (Movie)

                              • qq66

                                last Friday at 4:43 AM

                                > We’ve found Quibbler useful in preventing agents from: 1) fabricating results without running commands

                                What a world we've created for ourselves

                                  • N_Lens

                                    last Friday at 6:40 AM

                                    Next step is critics for the critics.

                                      • CoastalCoder

                                        last Friday at 11:03 AM

                                        Until they reach critical mass.

                                • last Friday at 1:25 AM

                                  • cjonas

                                    last Friday at 3:33 AM

                                    Vibeception