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  1. Home
  2. /Discussion
  3. /Show HN: Quibbler – A critic for your coding agent that learns what you want
  1. Home
  2. /Discussion
  3. /Show HN: Quibbler – A critic for your coding agent that learns what you want
Last activity 24 days agoPosted Oct 30, 2025 at 8:43 PM EDT

Quibbler – a Critic for Your Coding Agent That Learns What You Want

etherio
114 points
27 comments

Mood

calm

Sentiment

mixed

Category

other

Key topics

AI Agents
Code Review
LLM
Debate intensity60/100

Quibbler is a tool that acts as a critic for coding agents, learning what the user wants and providing feedback; the discussion revolves around its utility, potential applications, and the implications of using such a tool.

Snapshot generated from the HN discussion

Discussion Activity

Very active discussion

First comment

3h

Peak period

23

Day 1

Avg / period

9

Comment distribution27 data points
Loading chart...

Based on 27 loaded comments

Key moments

  1. 01Story posted

    Oct 30, 2025 at 8:43 PM EDT

    27 days ago

    Step 01
  2. 02First comment

    Oct 30, 2025 at 11:33 PM EDT

    3h after posting

    Step 02
  3. 03Peak activity

    23 comments in Day 1

    Hottest window of the conversation

    Step 03
  4. 04Latest activity

    Nov 3, 2025 at 1:23 AM EST

    24 days ago

    Step 04

Generating AI Summary...

Analyzing up to 500 comments to identify key contributors and discussion patterns

Discussion (27 comments)
Showing 27 comments
etherioAuthor
27 days ago
1 reply
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
27 days ago
1 reply
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
27 days ago
1 reply
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
27 days ago
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.
qq66
27 days ago
1 reply
> 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
27 days ago
1 reply
Next step is critics for the critics.
CoastalCoder
27 days ago
Until they reach critical mass.
anonymous908213
27 days ago
1 reply
But who polices the vibe police?
Brajeshwar
27 days ago
“Well, who’s gonna monitor the monitors of the monitors?” — Enemy of the State (Movie)
selfawareMammal
27 days ago
2 replies
An agent's agent?
hikarudo
27 days ago
A gentleman's gentleman!
oneandonley1
27 days ago
Sounds like a wip to me, "do it better or get punished"
balleddog
27 days ago
3 replies
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.
asn0
27 days ago
1 reply
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
25 days ago
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.

epiccoleman
27 days ago
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.
thenthenthen
27 days ago
Sounds like video streaming services…
mouse_
27 days ago
1 reply
There's so many agents to handle my agents, I'm gonna need agents for my agent agents soon.
vismit2000
26 days ago
Reminds of factory factory factory! https://factoryfactoryfactory.net/
p0w3n3d
27 days ago
In other words, the Quibbler siphons wrackspurts away from your code.
stacktraceyo
26 days ago
Can the same concept be used for non coding tasks?
cjonas
27 days ago
Vibeception
janpio
27 days ago
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
benzible
24 days ago
Cool concept, but I picture Quibbler as an off-brand Batman villain.
gexla
27 days ago
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
27 days ago
Submitted a PR with AWS Bedrock support: https://github.com/fulcrumresearch/quibbler/pull/5/files (credits!)
agarttha
26 days ago
Replace the middle manager
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ID: 45767162Type: storyLast synced: 11/20/2025, 5:51:32 PM

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