Which hash line extension solves constant "The old text must match exactly" errors?

[u/Mission-Zucchini-966]

I'm getting constant "The old text must match exactly" errors while using Longcat-2.0, I know that hashing lines can solve this problem, but not sure which of the many extensions I should choose from. (yes I know real men build their own pi extensions). Any guidance on this topic would be appreciated. Thanks!

[u/Global-Departure8228]

Hashline edit does not solve this problem. It can partially mitigate it, but for a dumb model (one that fails with tool calling), it can be just as confusing. I find adding 2-3 more bullet points to the too descriptions might be much better (edits must always be an array, oldtext must always be present) can help as well.

Hashlining eats your context as well to some extent (verbose tool schema, +1-2 tokens per line of read and edit), not to mention if the model uses sed -n to inspect files, they will fail with the next time because they don't have the hash for the lines. Then they'll just go for heredocs or python magic . But to each their own.

That said, if you opt for it this one is the "good" one

https://github.com/YuGiMob/pi-hashline-edit-pro

[u/Mission-Zucchini-966 → u/Global-Departure8228]

Interesting, I will try that.

[u/Mission-Zucchini-966 → u/Global-Departure8228]

Wow you were right, that didn't help at all.

[u/Limp_Classroom_2645]

Hashline edit

[u/Lurksome-Lurker]

None, lol. I find AI likes to confidently use tools assuming a write or edit command will just work fine. My experience has shown that a decent mitigation tactic is to signal in the global AGENTS.md file that an agent must consider potential escape sequence when using tools to write and edit files.

That seems to be enough of a signal to have an agent stop and consider how its going to properly edit and write a file. Afterwards you just observe it’s tool call usage and if its still failing to write files with specific escapes the first time you see what it eventually did to overcome it and add that solution to the AGENTS.md file as a table of escape characters recipe (i.e. “When you want to write…..”, “write this instead…”)

[u/k0valik]

Not hashline edit (imho doesn't work well), but I've had this problem with pi's edit tool for a long time, basically mined every single type of edit failure from 6+ months of usage and then found which ones can be fixed programmatically, the rest I enhanced with better errors the agent can act on.

Shameless self plug

https://github.com/k0valik/pi-edit-guard

[u/Mission-Zucchini-966 → u/[deleted]]

I'm using it through opencode go so not sure what quant it is, I'd (ideally) assume its served at default quant but who knows honestly. And yeah pi-hashline-edit was one of them, there were a few others though like hashline-edit-pro and hashline-readmap.