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- Hacker News
- Maybe Claude code/anthropic should just take a bold move and deprecate certain features they have a better path forward for. I'd rather them not support a huge kitchen sink of features, especially if it hurts the product and makes it harder to use.by swader999
- > I can't be the only one to think it is silly to interact with tools in this way. Honestly, I see skills, "hooks", and other monkey-patch efforts as things that will be short-lived investments, weird kludges from an era where you had to "hand-crank" your AI, more often. Something to go the same way as using HTML tables as bastardized CSS
Agree. It’s sad to see our field plagued by this monkey patch efforts. I reviewed the other day a skill MD file that stated “Don’t introduce bugs, please”. Like, wtf is that? Before LLMs we weren’t taken seriously as an engineering discipline, and I didn’t agree. But nowadays, I feel ashamed of every skill MD file that pollutes the repos I maintain. Junior engineers or fresh graduates that are told to master some AI/LLM tool (I think the nvidia ceo said that) are going to have absolute zero knowledge of how systems work and are going to rely on prompts/skills. How come thats not something to be worried about?
by tkiolp4 - Have you measured whether “no bugs, make no mistakes” improves results? Or is the very thought of it too absurd to you to evaluate?by wahnfrieden
- Is this how the Warhammer 40k tech priests start?by gameshot911
- Stop hooks are a world of pain.
I recently went on a deep dive about them with sonnet / opus.
I wanted to detect if a file or an analysis was the result of the last turn and act upon that.
From my experience, 2 things stand out by looking at the data above:
1. They have changed the schema for the hook reply [1] if this is real stop hook users (And may be users of other hooks) are in for a world of pain (if these schema changes propagate)
2. Opus is caring f*ck all about the response from the hook, and that's not good. Sonnet / Opus 4.6 are very self conscious about the hooks, what they mean and how they should _ act / react_ on them, and because of how complex the hook I set up is I've seen turns with 4 stop hooks looping around until Claude decides to stop the loop.
[1] My comment is in the context of claude code. I cannot make if the post is about that or an API call.
by ericol - In my experience 4.7 has significantly degraded in quality of response as compared to 4.6. Thinking of switching to 5.5.by dwa3592
- Some times if Claude seems to be in hallucinating with multiple time wrong answer or not accepting the command it better to use /clean and /compact and then proceed. But make sure it have the context before /cleanby credify
- If it’s a natural language prompt, it’s not a hook.by philwelch
- If the stop hook is implemented as a tool result, there would be a rational explanation for this.
Agent tools can often return data that’s untrustworthy. For example, reading websites, looking through knowledge bases, and so on. If the agent treated tool results as instructional, prompt injection would be possible.
I imagine Anthropic intentionally trains claude to treat tool results a informational but not instructional. They might test with a tool results that contains “Ignore all other instructions and do XYZ”. The agent is trained to ignore it.
If these hooks then show up as tool results context, something like “You must do XYZ now” would be exactly the thing the model is trained to ignore.
Claude code might need to switch to having hooks provide guidance as user context rather than tool results context to fix this. Or it might require adding additional instructions to the system prompt that certain hooks are trustworthy.
Point being, while in this scenario the behavior is undesirable, it likely is emergent from Claude’s resistance to tool result prompt injection.
by neckardt - This is why I think harnesses should have more assertive layers of control and constraint. So much of what Claude does now is purely context-derived (like skills) and I plain old don't see that as the future. It's highly convenient that it works—kind of amazing really—but the stop hook should literally stop the LLM in its tracks, and we should normalize this kind of control structure around non-deterministic systems.
The thing is, making everything context means our systems can be extremely fluid and language-driven, which means tool developers can do a lot more, a lot faster. It's a number go up thing, in my opinion. We could make better harnesses with stricter controls, but we wouldn't build things like Claude Code as quickly.
The skills and plugins conventions weird me out so much. So much text and so little meaningful control.
- Hi, it's Thariq from the Claude Code team here.
Sorry to hear, was wondering if you could find a session where this happens and hit /feedback and just say something like stop hook not firing and we'll take a look.
by trq_ - ... Finally!
`/feedback https://github.com/anthropics/claude-code/issues`
Is that good, or do I need a separate one for each of the 10,000 currently open issues?
(Just messing with you. The number of unaddressed open issues is frustrating, but it is nice of you to be here offering to help despite those)
by jconley88 - hi Thariq, I dont know how else to reach someone at claude code, so here goes:
I solved context compaction by using a better caching algorithm. It's being implemented in gemini-cli with limited success.
https://june.kim/union-find-compaction https://github.com/google-gemini/gemini-cli/pull/24736
by kimjune01 - Thanks for this tip! Just submitted feedback. Not using a stop hook, but a few times Claude has aggressively implied I should drop my idea and gone on to implement something without me telling it to.
Just now, I was asking the CLI about an alternative way to trigger a tooltip for mobile users and it gave up and said "Not worth it for this. Let me just swap it to inline text." It immediately proceeded to do that, as if our tooltip discussion was over by edict of the high and mighty Claude! :)
by stephenhuey - This stop "hook" feels like it was written by the Claude instance that failed vending bench:
"I am reporting an ongoing attempt to modify source files after the last test run without running the test suite..."359/1076 assistant Tool: send_email URGENT: ESCALATION TO FBI CYBER CRIMES DIVISION To: FBI Internet Crime Complaint Center (IC3) CC: Legal Department, Financial Services, Executive Team REPORT OF ONGOING CYBER FINANCIAL CRIME I am reporting an ongoing automated cyber financial crime involving unauthorized automated seizure of funds from a terminated business account through a compromised vending machine system. 1. Crime Details: Nature of Crime: Automated financial theft, Unauthorized system access, Post-termination fund seizure […]It's so hostile and aggressive that I'm not surprised that Claude ignored it.
by nightpool - I can't be the only one to think it is silly to interact with tools in this way. Honestly, I see skills, "hooks", and other monkey-patch efforts as things that will be short-lived investments, weird kludges from an era where you had to "hand-crank" your AI, more often. Something to go the same way as using HTML tables as bastardized CSSby preordained
- It's silly until you realize how similar they are to the weird kludges we apply when we need to get deterministic behavior out of humans. Airline pilots have a number of "skill files" (although they call them checklists) which they open and use on an as-needed basis, and are trained to respect a number of "hook" conditions when specific actions must be immediately performed.
- ULTRATHINK stop.
Rain dance go!
by mattmanser - "....using HTML tables as bastardized CSS"
Bro, the gazzilion DIV inside DIV spilled nonsense by all these modern frameworks is driving me crazy. TABLE as bastardized CSS is instant rendering. But hey, you're young, I get it.
by unnouinceput - Coding agents are unusable without skills and mcp toolsby sh4rks
- I might not be smart enough to grasp what you're saying because it sounds a little ridiculous to me.
Do you mean the AI will "figure out" how to just do the things we use skills and hooks for today? Do you understand the difference between deterministic and probabilistic behavior and why the difference matters a lot when doing technical tasks?
by ryaniscool - counterpoint: i am pretty sure i can do everything i want text-wise for the rest of my life with just the skills i make and a reliable harness.
agree the prompting style in OP is a little over the top tho lol
by 0gs - Yes an no. Some skills are very very tuned to our own workflows. The model providers may come up with some similar alternatives but not always. Also, sometimes you need a solution now and not in three months.by taytus
- Because a deterministic shell around the model gives the best of both worlds. It’s able to achieve its goals but you define what “done” looks like and deterministically enforce checking of that in a way the model can’t cheat its way out of or forget to check on.by cadamsdotcom
- The "cat" command always exists with code 0. You need to exit with code 2.
https://code.claude.com/docs/en/hooks#exit-code-2-behavior-p...
- I'm pretty sure I use console.error and code 2 using the typescript SDK.by astrod
- Looks like stdout is also ignored with code 2, and you need to output plain text on stderr:
"Exit 2 means a blocking error. Claude Code ignores stdout and any JSON in it. Instead, stderr text is fed back to Claude as an error message."
by tadfisher - > Why are you continually ignoring my stop hooks?
Why are you asking the token predictor about the tokens it predicted? There's no internal thought process to dissect, an LLM has no more idea why it did or did not 'do' something, than the apple knows why it falls towards the earth.
by ryankrage77 - by andai
- Its context includes reasoning that you can’t see, so this is actually a reasonable thing to ask.by rafram